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echotel ? model 961/962 ultrasonic level switches d e s c r i p t i o n increasing demands for compliance with safety systems and overfill protection has mandated more reliable point level measurement. echotel ? models 961 & 962 ultrasonic level switches meet these demands with advanced trans- ducer designs, extensive hazardous location approvals, and a new self-test technology. model 961 offers the ultimate solution to reliable single point liquid level measurement. this advanced switch uses pulsed signal technology for superior performance in difficult process conditions, and to provide excellent immunity from sources of electrical noise interference. extensive self-testing of the electronics and transducer make this advanced switch suitable for use in safety integrity level (sil) 2 loops. model 962 is a dual point switch that can be used as a level controller, or to control pumps in an auto fill or auto empty mode. the tip sensitive lower gap performs well in aerated or foamy liquids, and can measure to within 1 M 4 " of the vessel bottom. the rigidity of the unique flow-through upper gap allows separations of up to 128" (325 cm) between the upper and lower transducer gaps. f e a t u r e s ? single or dual point liquid level measurement ? advanced self-test technology provides unsurpassed testing of electronics, transducer, piezoelectric crystals, and electromagnetic noise ? adjustable time delay for turbulent aerated liquids ? relay output or ma current shift with separate malfunction indication ? integral or remote mount electronics ? pulsed signal technology ? extensive fm, csa, and atex explosion proof and intrinsically safe approvals ? suitable for safety integrity level (sil) 2 loops model 961 model 962 a p p l i c a t i o n s ? high level alarm ? low level alarm ? overfill protection ? pump protection ? seal pot level ? pump control i n d u s t r i e s ? chemical ? petrochemical ? pulp and paper ? food and pharmaceutical ? power ? water and wastewater
p u l s e d s i g n a l t e c h n o l o g y c h a l l e n g i n g p r o c e s s c o n d i t i o n s s u c h a s a e r a t i o n , s u s p e n d e d s o l i d s , a n d h i g h v i s c o s i t i e s a r e e a s i l y h a n d l e d w i t h t h e p u l s e d s i g n a l t e c h n o l o g y u t i l i z e d i n t h e 9 6 1 / 9 6 2 s w i t c h e s . p u l s e d s i g n a l c i r c u i t r y d r i v e s t h e t r a n s m i t p i e z o e l e c t r i c c r y s t a l t o p r o d u c e p o w e r f u l p u l s e s o f h i g h - f r e q u e n c y u l t r a s o n i c e n e r g y . t h e s e u l t r a s o n i c p u l s e s a r e r e a d i l y t r a n s m i t t e d t h r o u g h l i q u i d s , b u t a r e a t t e n u a t e d w h e n t h e t r a n s d u c e r g a p i s d r y . t h i s t e c h n o l o g y a l s o p r o v i d e s e x c e l l e n t i m m u - n i t y f r o m e l e c t r o m a g n e t i c n o i s e i n t e r f e r e n c e . p u l s e d s i g n a l t e c h n o l o g y m a k e s t h e 9 6 1 / 9 6 2 u n i t s m o r e r e l i a b l e t h a n o l d e r c o n t i n u o u s w a v e u l t r a s o n i c s w i t c h e s . u n l i k e m a n y t u n i n g f o r k s , p u l s e d s i g n a l u l t r a s o n i c s w i t c h e s d o n o t n e e d t o b e c o n f i g u r e d f o r d i f f e r e n t m e d i a d e n s i t i e s , m a k i n g t h e s e u n i t s t h e m o s t u n i v e r s a l l y a p p l i e d l e v e l s w i t c h e s o n t h e m a r k e t t o d a y . m o d e l 9 6 1 / 9 6 2 s w i t c h e s u t i l i z e u l t r a s o n i c e n e r g y t o d e t e c t t h e p r e s e n c e o r a b s e n c e o f l i q u i d i n a s i n g l e o r d u a l p o i n t t r a n s d u c e r . u l t r a s o n i c c o n t a c t l e v e l t e c h n o l o g y u s e s h i g h - f r e q u e n c y s o u n d w a v e s t h a t a r e e a s i l y t r a n s m i t t e d a c r o s s a t r a n s d u c e r g a p i n t h e p r e s e n c e o f a l i q u i d m e d i a , b u t a r e a t t e n u a t e d w h e n t h e g a p i s d r y . m o d e l 9 6 1 / 9 6 2 s w i t c h e s u s e a n u l t r a s o n i c f r e q u e n c y o f 2 m h z t o p e r f o r m t h i s l i q u i d l e v e l m e a s u r e m e n t i n a w i d e v a r i e t y o f p r o c e s s m e d i a a n d a p p l i c a t i o n c o n d i t i o n s . t h e t r a n s d u c e r u s e s a p a i r o f p i e z o e l e c t r i c c r y s t a l s t h a t a r e e n c a p s u l a t e d i n e p o x y a t t h e t i p o f t h e t r a n s d u c e r . t h e c r y s t a l s a r e m a d e o f a c e r a m i c m a t e r i a l t h a t v i b r a t e s a t a g i v e n f r e q u e n c y w h e n s u b j e c t e d t o a n a p p l i e d v o l t a g e . t h e t r a n s m i t c r y s t a l c o n v e r t s t h e a p p l i e d v o l t a g e f r o m t h e e l e c t r o n i c s i n t o a n u l t r a s o n i c s i g n a l . w h e n l i q u i d i s p r e s e n t i n t h e g a p , t h e r e c e i v e c r y s t a l s e n s e s t h e u l t r a s o n i c s i g n a l f r o m t h e t r a n s m i t c r y s t a l a n d c o n v e r t s i t b a c k t o a n e l e c - t r i c a l s i g n a l . t h i s s i g n a l i s s e n t t o t h e e l e c t r o n i c s t o i n d i - c a t e t h e p r e s e n c e o f l i q u i d i n t h e t r a n s d u c e r g a p . w h e n t h e r e i s n o l i q u i d p r e s e n t , t h e u l t r a s o n i c s i g n a l i s a t t e n u - a t e d a n d i s n o t d e t e c t e d b y t h e r e c e i v e c r y s t a l . ultrasonic transducer transmit crystal receive crystal ultrasonic signal transmission across transducer gap t e c h n o l o g y b a s i c o p e r a t i o n 2 s a f e t y i n t e g r i t y l e v e l ( s i l ) c r i t i c a l p r o c e s s c o n t r o l a p p l i c a t i o n s d e m a n d r e l i a b l e i n s t r u - m e n t s t h a t p r o v i d e h i g h l e v e l s o f s a f e t y . t h e i n t r o d u c t i o n o f s t a n d a r d s s u c h a s i e c 6 1 5 0 8 , i e c 6 1 5 1 1 a n d i s a 8 4 , h a v e g e n e r a t e d i n t e r e s t i n u s i n g s a f e t y i n s t r u m e n t e d s y s t e m s ( s i s ) a s a m e a n s t o d e f i n e t h e r e l i a b i l i t y o f i n s t r u m e n t s i n a c o n t r o l l o o p . a l l v e r s i o n s o f t h e m o d e l 9 6 1 / 9 6 2 s w i t c h e s u n d e r g o a d e t a i l e d p e r f o r m a n c e e v a l u a t i o n c a l l e d a f a i l u r e m o d e s , e f f e c t s a n d d i a g n o s t i c s a n a l y s i s ( f m e d a ) . t h r e e k e y c o m p o n e n t s o f t h e f m e d a a r e t h e s a f e t y i n t e g r i t y l e v e l ( s i l ) , s a f e f a i l u r e f r a c t i o n ( s f f ) a n d t h e a v e r a g e p r o b a b i l i t y o f f a i l u r e o n d e m a n d ( p f d a v g ) . 9 6 1 r e l a y 9 6 1 c u r r e n t s h i f t 9 6 2 r e l a y 9 6 2 c u r r e n t s h i f t s i l 2 a s 1 o o 1 2 a s 1 o o 1 2 a s 1 o o 1 2 a s 1 o o 1 s f f 9 2 . 0 % 9 1 . 4 % 9 1 . 5 % 9 1 . 8 % p f d a v g 1 . 7 7 e - 0 4 1 . 6 1 e - 0 4 2 . 3 1 e - 0 4 1 . 8 7 e - 0 4
3 a d v a n c e d s e l f - t e s t a n d d i a g n o s t i c s u l t r a s o n i c s w i t c h e s a r e o f t e n u s e d a s t h e l a s t m e a n s o f d e t e c t i n g w h e t h e r a p r o c e s s v e s s e l w i l l o v e r f l o w a n d c a u s e a s p i l l o f p o t e n t i a l l y h a z a r d o u s l i q u i d s , o r e m p t y o u t a n d p o s s i b l y c a v i t a t e t h e p u m p s . i n t h e s e c r i t i c a l a p p l i c a t i o n s i t i s d e s i r a b l e t o h a v e a m e t h o d o f p e r i o d i c a l l y t e s t i n g t h e u l t r a s o n i c s w i t c h t o e n s u r e t h a t i t i s f u n c t i o n i n g p r o p e r l y . m o d e l 9 6 1 / 9 6 2 s w i t c h e s f e a t u r e a n a d v a n c e d s e l f - t e s t t e c h n o l o g y t h a t n o t o n l y t e s t s t h e e l e c t r o n i c s , t r a n s d u c e r , a n d p i e z o e l e c t r i c c r y s t a l s , b u t a l s o t e s t s f o r t h e p r e s e n c e o f i n d u s t r i a l s o u r c e s o f e n v i r o n m e n t a l n o i s e . s h o u l d t h e s w i t c h d e t e c t a n y p r o b l e m s a m a l f u n c t i o n o u t p u t i s g e n - e r a t e d t o a l a r m t h e u s e r , a n d a r e d l e d i s l i t t o i n d i c a t e a n a l a r m c o n d i t i o n . s e l f - t e s t i s p e r f o r m e d a u t o m a t i c a l l y a n d c o n t i n u o u s l y s e v - e r a l t i m e s p e r s e c o n d t o v e r i f y p r o p e r o p e r a t i o n o f 9 6 1 / 9 6 2 s w i t c h e s . i n a d d i t i o n , a p u s h b u t t o n i s p r o v i d e d t o i n i t i a t e a m a n u a l s e l f - t e s t m o d e . p r e s s i n g t h i s t e s t b u t t o n s t o p s a l l t r a n s m i t p u l s e s , w h i c h s i m u l a t e s a n e l e c t r o n i c s f a i l u r e . t h i s f a i l u r e i s r e p o r t e d a s : ? 3 . 6 o r 2 2 m a ( s e l e c t a b l e ) w i t h c u r r e n t s h i f t o u t p u t u n i t s ? s p d t m a l f u n c t i o n r e l a y d e - e n e r g i z e s w i t h r e l a y o u t p u t u n i t s t a k i n g d i a g n o s t i c s o n e s t e p f u r t h e r i s t h e u n i q u e n o i s e s e l f - t e s t m o d e f e a t u r e t h a t i s s t a n d a r d i n a l l 9 6 1 / 9 6 2 s w i t c h e s . t h i s t e s t s f o r e l e c t r o m a g n e t i c a n d a c o u s t i c a l n o i s e t h a t c a n i n f l u e n c e m a n y i n s t r u m e n t a t i o n t e c h n o l o - g i e s . i f h i g h l e v e l s o f e n v i r o n m e n t a l n o i s e a r e d e t e c t e d , t h e e l e c t r o n i c s r e p o r t s a f a u l t c o n d i t i o n t o a l e r t t h e u s e r o f p o t e n t i a l i n s t r u m e n t a t i o n r e l i a b i l i t y c o n c e r n s . a m i c r o p r o c e s s o r i n t h e 9 6 1 / 9 6 2 e l e c t r o n i c s c o n t i n u o u s l y m o n i t o r s a l l s e l f - t e s t d a t a . s h o u l d a f a u l t o c c u r , t h e m i c r o - p r o c e s s o r c a n d e t e r m i n e w h e t h e r t h e m a l f u n c t i o n i s d u e t o t h e e l e c t r o n i c s , t r a n s d u c e r , p i e z o e l e c t r i c c r y s t a l s , o r t h e p r e s e n c e o f e n v i r o n m e n t a l n o i s e . a p u s h b u t t o n a n d f a u l t l e d i s u s e d t o a s s i s t i n t r o u b l e s h o o t i n g t h e s w i t c h : o n e f l a s h o f t h e f a u l t l e d i n d i c a t e s a p r o b l e m w i t h t h e t r a n s d u c e r o r p i e z o e l e c t r i c c r y s t a l s t w o f l a s h e s o f t h e f a u l t l e d i n d i c a t e s a p r o b l e m w i t h o n e o f t h e e l e c t r o n i c s b o a r d s t h r e e f l a s h e s o f t h e f a u l t l e d i n d i c a t e s e x c e s s i v e l e v e l s o f e n v i r o n m e n t a l n o i s e t r a n s d u c e r & c r y s t a l s e l e c t r o n i c s n o i s e a d j u s t a b l e t i m e d e l a y t u r b u l e n c e a n d s p l a s h i n g c a n c a u s e s o m e f i x e d t i m e r e s p o n s e s w i t c h e s t o p r o d u c e f a l s e l e v e l a l a r m s . m o d e l 9 6 1 / 9 6 2 s w i t c h e s o v e r c o m e t h i s d i f f i c u l t y w i t h a n a d j u s t a b l e t i m e d e l a y f e a t u r e . a p o t e n t i o m e t e r a l l o w s a 1 M 2 t o 4 5 s e c o n d d e l a y t o b e s e t t o d i s r e g a r d w a v e s o r s p l a s h e s , a n d r e l i a b l y d e t e c t t h e t r u e l i q u i d l e v e l . r e l i a b l e t r a n s d u c e r d e s i g n d e p e n d a b l e p o i n t l e v e l m e a s u r e m e n t b e g i n s w i t h r e l i a b l e s e n s o r d e s i g n . o v e r 3 0 y e a r s o f u l t r a s o n i c l e v e l s w i t c h t e c h - n o l o g y e x p e r i e n c e i s b e h i n d t h e m o d e l 9 6 1 / 9 6 2 s i n g l e a n d d u a l g a p t r a n s d u c e r s . t h e r e s u l t i s a n e x t r e m e l y r o b u s t t r a n s - d u c e r d e s i g n t h a t o f f e r s s u p e r i o r p e r f o r m - a n c e i n d i f f i c u l t p r o c e s s c o n d i t i o n s . m o d e l 9 6 1 s i n g l e p o i n t h a s a t i p - s e n s i t i v e t r a n s d u c e r w i t h a n a r c h - s h a p e d g a p f o r s u p e r i o r p e r f o r m a n c e i n a e r a t e d o r f o a m y l i q u i d s . d u a l p o i n t m o d e l 9 6 2 f e a t u r e s a t i p s e n - s i t i v e l o w e r g a p a n d f l o w t h r o u g h u p p e r g a p . t h i s r o b u s t d e s i g n a l l o w s s e p a r a t i o n s o f 1 2 5 i n c h e s ( 3 1 8 c m ) b e t w e e n t h e u p p e r a n d l o w e r t r a n s d u c e r g a p s .
4 pump p rotection fill line dual point alarm h igh alarm low alarm spr a y ball a p p l i c a t i o n s t y p i c a l m o d e l 9 6 1 s i n g l e p o i n t s w i t c h e s m a y b e u s e d f o r h i g h o r l o w l e v e l a l a r m , a s w e l l a s f o r p u m p p r o t e c t i o n . t h e m o d e l 9 6 2 d u a l p o i n t u n i t i s t y p i c a l l y c o n f i g u r e d t o m e a s u r e h i g h / l o w , h i g h / h i g h , o r l o w / l o w l e v e l s . t h e s i n g l e p o i n t 9 6 1 c a n b e m o u n t e d v e r t i c a l l y o r h o r i z o n t a l l y i n v e s s e l s , b r i d l e s , o r p i p e s . t h e d u a l g a p 9 6 2 i s a l w a y s t o p m o u n t e d . a b r o a d s e l e c t i o n o f t r a n s d u c e r m a t e r i a l s a l l o w t h e 9 6 1 / 9 6 2 t o b e u s e d i n a w i d e v a r i e t y o f p r o c e s s m e d i a . m e t a l l i c t r a n s d u c e r s i n c l u d e 3 1 6 s s , h a s t e l l o y ? c , a n d m o n e l ? . t h e 3 1 6 s s t r a n s d u c e r h a s a n a c e c o n s t r u c t i o n o p t i o n f o r s o u r g a s s e r v i c e , a n d c a n a l s o b e b u i l t p e r a s m e b 3 1 . 1 a n d b 3 1 . 3 p i p i n g c o d e s . t h e r m o p l a s t i c t r a n s d u c e r s i n c l u d e k y n a r ? a n d c p v c . t h e s e c o r r o s i o n r e s i s t a n t p l a s t i c t r a n s - d u c e r s f e a t u r e a s t i f f e n i n g t u b e t h a t r u n s t h e l e n g t h o f t h e t r a n s d u c e r f o r e x t r a r i g i d i t y . k y n a r - f a c e d 3 1 6 s s f l a n g e o p t i o n s a r e o f f e r e d w i t h t h e k y n a r t r a n s d u c e r s . p u m p c o n t r o l a d i p s w i t c h o n t h e m o d e l 9 6 2 a l l o w s i t t o b e c o n f i g u r e d t o c o n t r o l l e v e l , o r t o f u n c t i o n a s a p u m p c o n t r o l l e r . i n t h e p u m p c o n t r o l m o d e t h e u n i t c a n p e r f o r m a u t o f i l l o r a u t o e m p t y o f t a n k s , s u m p s , o r w e t w e l l s . t h e t i p s e n s i t i v e l o w e r g a p a l l o w s l i q u i d l e v e l s t o b e p u m p e d d o w n t o w i t h i n 1 M 4 " f r o m t h e b o t t o m o f t h e v e s s e l . t h e r i g i d i t y o f t h e f l o w t h r o u g h u p p e r g a p a l l o w s t h e 9 6 2 t o b e u s e d e v e n w h e n s u m p s e x p e r i e n c e s e v e r e t u r b u l e n c e f r o m v e s s e l f i l l l i n e s . h y g i e n i c t h e h y g i e n i c v e r s i o n o f t h e m o d e l 9 6 1 f e a t u r e s a d e e p d r a w n s t a i n l e s s s t e e l e l e c t r o n i c s h o u s i n g . t r i - c l a m p ? a n d d n 6 5 v a r i v e n t h y g i e n i c p r o c e s s c o n n e c t i o n s a r e o f f e r e d f o r u s e i n f o o d & b e v e r a g e , p h a r m a c e u t i c a l , a n d b i o t e c h n o l o g y a p p l i c a t i o n s . t h e s e h y g i e n i c t r a n s d u c e r s h a v e 3 - a ( a u t h o r i z a t i o n # 5 9 6 ) , e h e d g c e r t i f i c a t i o n ( p e r t n o r e p o r t # v 4 7 7 2 / 0 1 ) a n d a 2 0 r a f i n i s h t o p r o v i d e a u n i f o r m a n d u l t r a - s m o o t h s u r f a c e t h a t i n h i b i t s m i c r o b i a l g r o w t h . e l e c t r o n b e a m w e l d i n g t e c h n o l o g y i s u t i l i z e d t o f a c i l i t a t e a c r e v i c e - f r e e s u r f a c e i n s i d e t h e t r a n s d u c e r t i p . t h i s a l l o w s t h e s e t r a n s d u c e r s t o b e u s e d i n a w i d e v a r i e t y o f h y g i e n i c a p p l i c a t i o n s w h e r e c i p ( c l e a n - i n - p l a c e ) i s u s e d t o r e m o v e a n y c o n t a m i n a t i o n f r o m t h e t r a n s d u c e r s u r f a c e .
e l e c t r o n i c s s p e c i f i c a t i o n s m o d e l 9 6 1 / 9 6 2 w i t h r e l a y o u t p u t s u p p l y v o l t a g e 1 8 t o 3 2 v d c , o r 1 0 2 t o 2 6 5 v a c , 5 0 / 6 0 h z r e l a y o u t p u t s 9 6 1 : o n e d p d t l e v e l r e l a y a n d o n e s p d t m a l f u n c t i o n r e l a y 9 6 2 : t w o s p d t l e v e l r e l a y s a n d o n e s p d t m a l f u n c t i o n r e l a y r e l a y r a t i n g s d p d t : 5 a m p s @ 1 2 0 v a c , 2 5 0 v a c , a n d 3 0 v d c , 0 . 4 a m p @ 1 1 0 v d c s p d t : 5 a m p s @ 1 2 0 v a c , 2 5 0 v a c , a n d 3 0 v d c , 0 . 1 5 a m p @ 1 2 5 v d c f a i l - s a f e s e l e c t a b l e f o r h i g h o r l o w l e v e l p o w e r c o n s u m p t i o n 9 6 1 / 9 6 2 : l e s s t h a n 3 w a t t s a m b i e n t t e m p e r a t u r e - 4 0 t o + 1 6 0 f ( - 4 0 t o + 7 0 c ) m o d e l 9 6 1 / 9 6 2 w i t h c u r r e n t s h i f t o u t p u t s u p p l y v o l t a g e 1 1 t o 3 5 v d c c u r r e n t s h i f t o u t p u t 9 6 1 : 8 m a n o r m a l o p e r a t i o n , 1 6 m a l e v e l a l a r m ( 1 m a ) 9 6 2 : 8 m a n o r m a l o p e r a t i o n , 1 2 m a l o w e r g a p a l a r m , 1 6 m a u p p e r g a p a l a r m ( 1 m a ) 9 6 1 / 9 6 2 : 3 . 6 m a o r 2 2 m a s e l e c t a b l e f a u l t s i g n a l ( 1 m a ) l o o p r e s i s t a n c e 1 0 4 o h m s w i t h 1 1 v d c i n p u t , 1 1 0 0 o h m s w i t h 3 5 v d c i n p u t f a i l - s a f e s e l e c t a b l e f o r h i g h o r l o w l e v e l p o w e r c o n s u m p t i o n 9 6 1 / 9 6 2 l e s s t h a n 1 w a t t a m b i e n t t e m p e r a t u r e - 4 0 t o + 1 6 0 f ( - 4 0 t o + 7 0 c ) 5 t r a n s d u c e r s p e c i f i c a t i o n s m o d e l 9 a 1 / 9 m 1 s i n g l e p o i n t t r a n s d u c e r m a t e r i a l m a t e r i a l c o d e ( p a g e 1 0 ) o p e r a t i n g t e m p e r a t u r e r a n g e m a x i m u m p r e s s u r e a c t u a t i o n l e n g t h 3 1 6 s t a i n l e s s s t e e l a * , s , n , k - 4 0 t o + 3 2 5 f ( - 4 0 t o + 1 6 3 c ) 2 0 0 0 p s i ( 1 3 8 b a r ) 1 " a n d 2 " ( 3 a n d 5 c m ) 3 1 6 s t a i n l e s s s t e e l a * , s , n , k - 4 0 t o + 3 2 5 f ( - 4 0 t o + 1 6 3 c ) 1 5 0 0 p s i ( 1 0 3 b a r ) 3 " t o 1 3 0 " ( 6 t o 3 3 0 c m ) h a s t e l l o y c - 2 7 6 b - 4 0 t o + 3 2 5 f ( - 4 0 t o + 1 6 3 c ) 2 0 0 0 p s i ( 1 3 8 b a r ) 1 " a n d 2 " ( 3 a n d 5 c m ) h a s t e l l o y c - 2 7 6 b - 4 0 t o + 3 2 5 f ( - 4 0 t o + 1 6 3 c ) 1 5 0 0 p s i ( 1 0 3 b a r ) 3 " t o 1 3 0 " ( 6 t o 3 3 0 c m ) m o n e l c - 4 0 t o + 3 2 5 f ( - 4 0 t o + 1 6 3 c ) 1 2 0 0 p s i ( 8 3 b a r ) 1 " t o 1 3 0 " ( 3 t o 3 3 0 c m ) k y n a r r - 4 0 t o + 2 5 0 f ( - 4 0 t o + 1 2 1 c ) s e e g r a p h b e l o w 2 " t o 1 3 0 " ( 5 t o 3 3 0 c m ) c p v c p - 4 0 t o + 1 8 0 f ( - 4 0 t o + 8 2 c ) s e e g r a p h b e l o w 1 " t o 1 3 0 " ( 3 t o 3 3 0 c m ) t r a n s d u c e r m a t e r i a l m a t e r i a l c o d e ( s e e p a g e 1 0 ) o p e r a t i n g t e m p e r a t u r e r a n g e m a x i m u m p r e s s u r e a c t u a t i o n l e n g t h 3 1 6 s t a i n l e s s s t e e l a , k - 4 0 t o + 3 2 5 f ( - 4 0 t o + 1 6 3 c ) 1 5 0 0 p s i ( 1 0 3 b a r ) 5 " t o 1 3 0 " ( 1 3 t o 3 3 0 c m ) c p v c p - 4 0 t o + 1 8 0 f ( - 4 0 t o + 8 2 c ) s e e g r a p h b e l o w 5 " t o 1 3 0 " ( 1 3 t o 3 3 0 c m ) 300 250 200 150 100 50 -40 0 60 120 180 240 0 p r e s s u r e ( p s i ) tempe ratu re (f) 30 25 20 15 10 5 -40 0 40 80 120 0 p r e s s u r e ( b a r ) tempe ratu re (c) range wi t h p n 16 flan g e range wi t h 1 5 0# flan g e range wi t h " npt 300 250 200 150 100 50 -40 0 40 80 120 160 200 0 p r e s s u r e ( p s i ) tempe ratur e (f) 30 25 2015 10 5 -40 0 40 80 120 0 p r e s s u r e ( b a r ) t empe ratur e ( c) kynar transduce r ratin gs cpvc transduce r ratin g s * m a t e r i a l c o d e a h a s a c r y o g e n i c t r a n d s u c e r o p t i o n f o r - 1 1 0 t o + 2 5 0 f ( - 8 0 t o + 1 2 0 c ) o p e r a t i n g t e m p e r a t u r e r a n g e m o d e l 9 a 2 / 9 m 2 d u a l p o i n t
p e r f o r m a n c e s p e c i f i c a t i o n s r e p e a t a b i l i t y 0 . 0 7 8 " ( 2 m m ) r e s p o n s e t i m e 1 M 2 s e c o n d t y p i c a l t i m e d e l a y v a r i a b l e 0 . 5 C 4 5 s e c o n d s o n r i s i n g a n d f a l l i n g l e v e l s s e l f - t e s t a u t o m a t i c : c o n t i n u o u s l y v e r i f i e s o p e r a t i o n o f e l e c t r o n i c s , t r a n s d u c e r , p i e z o e l e c t r i c c r y s t a l s , a n d e l e c t r i c a l n o i s e m a n u a l : p u s h b u t t o n v e r i f i e s o p e r a t i o n o f e l e c t r o n i c s , t r a n s d u c e r , a n d p i e z o e l e c t r i c c r y s t a l s s h o c k c l a s s a n s i / i s a - s 7 1 . 0 3 c l a s s s a 1 v i b r a t i o n c l a s s a n s i / i s a - s 7 1 . 0 3 c l a s s v c 2 h u m i d i t y 0 C 9 9 % , n o n - c o n d e n s i n g e l e c t r o m a g n e t i c c o m p a t i b i l i t y m e e t s c e r e q u i r e m e n t s e n 6 1 3 2 6 p h y s i c a l s p e c i f i c a t i o n s h o u s i n g m a t e r i a l c a s t a l u m i n u m a 3 5 6 - t 6 , c a s t 3 1 6 s t a i n l e s s s t e e l , o r d e e p d r a w n 3 0 4 s t a i n l e s s s t e e l ( h y g i e n i c h o u s i n g ) c a b l e e n t r y d u a l 3 M 4 " n p t , o r m 2 0 c o n n e c t i o n s ( o n e e n d i s p l u g g e d ) g r o s s w e i g h t 9 6 1 / 9 6 2 e l e c t r o n i c s : 2 . 2 l b s . ( 1 . 0 k g ) 2 " ( 5 c m ) t r a n s d u c e r : 0 . 6 l b s . ( 0 . 3 k g ) 6 m o d e l 9 6 1 w i t h h y g i e n i c h o u s i n g w i t h t r i - c l a m p ? 1 6 - a m p f i t t i n g m o d e l 9 6 1 w i t h c a s t a l u m i n u m h o u s i n g w i t h n p t c o n n e c t i o n m o d e l 9 6 1 w i t h c a s t s t a i n l e s s s t e e l h o u s i n g a n d a n s i f l a n g e 1.8 (46) typical 1.05 (26) typical 4.00 (10 2 ) 4.00 (1 0 2) ? .875 (22) ? .875 (22) ? .875 (22) actuatio n le n gth for tri-cl a mp fitti n g 4.43 (113) 4.43 (113) 0.25 (6) 0.25 (6) 0.25 (6) actuatio n le ngth for n p t conn ection actuatio n length for an s i flange 2.35 (60) typical 5. 2 4 (133) 5 . 75 (146) d i m e n s i o n a l s p e c i f i c a t i o n s i n c h e s ( m m )
7 d i m e n s i o n a l s p e c i f i c a t i o n s i n c h e s ( m m ) actuation le n gth a actuation le n gth b ? .875 (22) dia. 4.00 (1 0 2) 4.43 (113) 1.8 (46 ) typical 0.25 (6) 3.50 (89) 2.75 (70) 2.00 (51) 3.00 (76) 2 holes .38 (10) dia. 4.00 (102) 4.00 (102) 3.95 (100) 4.43 (113) ?" npt conduit connection ? .875 (22) 0.25 (6) actuation length for npt connection 1.8 (46) typical m o d e l 9 6 1 / 9 6 2 w i t h r e m o t e e l e c t r o n i c s r e m o t e t r a n s d u c e r w i t h n p t c o n n e c t i o n m o d e l 9 6 2 w i t h n p t c o n n e c t i o n actuation length a actuation length b ? .875 (22) dia. 4.00 (1 0 2) 4.43 (113) 2.35 (60) typical 0.25 (6) m o d e l 9 6 2 w i t h a n s i f l a n g e
8 9 6 1 s i n g l e - p o i n t e l e c t r o n i c s 9 6 2 d u a l - p o i n t e l e c t r o n i c s m o d e l n u m b e r 9 6 1 / 9 6 2 e l e c t r o n i c s b a s i c m o d e l n u m b e r 2 1 8 t o 3 2 v d c l i n e - p o w e r e d 5 1 1 t o 3 5 v d c l o o p - p o w e r e d 7 1 0 2 t o 2 6 5 v a c l i n e - p o w e r e d i n p u t p o w e r 0 m a c u r r e n t s h i f t ( a v a i l a b l e w i t h i n p u t p o w e r c o d e 5 ) d 5 - a m p g o l d f l a s h r e l a y s ( a v a i l a b l e w i t h i n p u t p o w e r c o d e s 2 o r 7 ) o u t p u t s i g n a l 0 i n t e g r a l 1 r e m o t e ( r e q u i r e s c o n n e c t i n g c a b l e f r o m p a g e 1 1 ) m o u n t i n g 1 f m / c s a i n t r i n s i c a l l y s a f e , n o n - i n c e n d i v e & e x p l o s i o n p r o o f * ( u s e w i t h c u r r e n t s h i f t o u t p u t s i g n a l c o d e 0 ) 3 f m / c s a e x p l o s i o n p r o o f & n o n - i n c e n d i v e ( u s e w i t h r e l a y o u t p u t s i g n a l c o d e d , a n d e l e c t r o n i c s h o u s i n g c o d e s 0 , 1 , 2 & 3 ) 7 f m / c s a n o n - i n c e n d i v e ( a v a i l a b l e w i t h o u t p u t s i g n a l c o d e s 0 & d a n d e l e c t r o n i c s h o u s i n g c o d e s 4 & 5 ) a a t e x i i 1 g e e x i a i i c t 5 , i n t r i n s i c a l l y s a f e ( u s e w i t h o u t p u t s i g n a l c o d e 0 , a n d e l e c t r o n i c s h o u s i n g c o d e s 0 , 1 , 2 , 3 ) c a t e x i i 1 / 2 g e e x d i i c t 6 , f l a m e p r o o f ( u s e w i t h o u t p u t s i g n a l c o d e 0 o r d , a n d e l e c t r o n i c s h o u s i n g c o d e s 0 , 1 , 2 , 3 ) a g e n c y a p p r o v a l 0 c a s t a l u m i n u m w i t h 3 M 4 " n p t d u a l c o n d u i t e n t r i e s 1 c a s t a l u m i n u m w i t h m 2 0 d u a l c o n d u i t e n t r i e s 2 c a s t s s w i t h 3 M 4 " n p t d u a l c o n d u i t e n t r i e s 3 c a s t s s w i t h m 2 0 d u a l c o n d u i t e n t r i e s 4 d e e p d r a w n s s w i t h 1 M 2 " n p t d u a l c o n d u i t e n t r i e s 5 d e e p d r a w n s s w i t h m 2 0 d u a l c o n d u i t e n t r i e s e l e c t r o n i c s h o u s i n g m o d e l s a v a i l a b l e f o r q u i c k s h i p m e n t , u s u a l l y w i t h i n o n e w e e k a f t e r f a c t o r y r e c e i p t o f a c o m p l e t e p u r c h a s e o r d e r , t h r o u g h t h e e x p e d i t e s h i p p l a n ( e s p ) 96 a 0 s t a n d a r d h o u s i n g c o v e r 1 g l a s s w i n d o w c o v e r ( a v a i l a b l e w i t h e l e c t r o n i c s h o u s i n g c o d e s 0 , 1 , 4 o r 5 ) h o u s i n g c o v e r * e x p l o s i o n p r o o f a p p r o v a l s n o t a v a i l a b l e w i t h h o u s i n g c o d e s 4 & 5
9 m o d e l n u m b e r 9 6 1 s i n g l e p o i n t t r a n s d u c e r 91 a e n g l i s h ( l e n g t h i n i n c h e s ) m m e t r i c ( l e n g t h i n c e n t i m e t e r s ) t r a n s d u c e r u n i t o f l e n g t h a 3 1 6 / 3 1 6 l s t a i n l e s s s t e e l s 3 1 6 / 3 1 6 l w i t h 2 0 r a h y g i e n i c f i n i s h ( u s e o n l y w i t h p r o c e s s c o n n e c t i o n c o d e s 3 t , 4 t , o r v v ) b h a s t e l l o y c - 2 7 6 c m o n e l r k y n a r * ( u s e o n l y w i t h p r o c e s s c o n n e c t i o n c o d e s 1 1 , 2 3 , 3 3 , 4 3 , b a , c a , d a ) p c p v c ( u s e o n l y w i t h p r o c e s s c o n n e c t i o n c o d e s 1 1 , 2 3 , 3 3 , 4 3 , b a , c a , d a ) n 3 1 6 / 3 1 6 l s t a i n l e s s s t e e l , n a c e c o n s t r u c t i o n k 3 1 6 / 3 1 6 l s t a i n l e s s s t e e l , a s m e b 3 1 . 1 & b 3 1 . 3 c o n s t r u c t i o n m a t e r i a l s o f c o n s t r u c t i o n p r o c e s s c o n n e c t i o n s 1 1 3 M 4 " n p t 2 1 1 " n p t 2 2 1 " b s p ( g 1 ) t h r e a d e d c o n n e c t i o n s 2 3 1 " 1 5 0 # a n s i r f f l a n g e 2 4 1 " 3 0 0 # a n s i r f f l a n g e 2 5 1 " 6 0 0 # a n s i r f f l a n g e 3 3 1 1 M 2 " 1 5 0 # a n s i r f f l a n g e 3 4 1 1 M 2 " 3 0 0 # a n s i r f f l a n g e 3 5 1 1 M 2 " 6 0 0 # a n s i r f f l a n g e 4 3 2 " 1 5 0 # a n s i r f f l a n g e 4 4 2 " 3 0 0 # a n s i r f f l a n g e 4 5 2 " 6 0 0 # a n s i r f f l a n g e a n s i r a i s e d f a c e f l a n g e s 3 t 1 1 M 2 " t r i - c l a m p ? 1 6 a m p f i t t i n g 4 t 2 " t r i - c l a m p ? 1 6 a m p f i t t i n g v v d n 6 5 C v a r i v e n t ? t y p e n h y g i e n i c c o n n e c t i o n s b a d n 2 5 p n 1 6 e n 1 0 9 2 - 1 t y p e a b b d n 2 5 p n 2 5 / 4 0 e n 1 0 9 2 - 1 t y p e a b c d n 2 5 p n 6 3 / 1 0 0 e n 1 0 9 2 - 1 t y p e b 2 c a d n 4 0 p n 1 6 e n 1 0 9 2 - 1 t y p e a c b d n 4 0 p n 2 5 / 4 0 e n 1 0 9 2 - 1 t y p e a c c d n 4 0 p n 6 3 / 1 0 0 e n 1 0 9 2 - 1 t y p e b 2 d a d n 5 0 p n 1 6 e n 1 0 9 2 - 1 t y p e a d b d n 5 0 p n 2 5 / 4 0 e n 1 0 9 2 - 1 t y p e a d d d n 5 0 p n 6 3 e n 1 0 9 2 - 1 t y p e b 2 d e d n 5 0 p n 1 0 0 e n 1 0 9 2 - 1 t y p e b 2 e n / d i n f l a n g e s m o d e l s a v a i l a b l e f o r q u i c k s h i p m e n t , u s u a l l y w i t h i n o n e w e e k a f t e r f a c t o r y r e c e i p t o f a c o m p l e t e p u r c h a s e o r d e r , t h r o u g h t h e e x p e d i t e s h i p p l a n ( e s p ) 1 " t o 1 3 0 " i n 1 " i n c r e m e n t s ( e x a m p l e : 4 i n c h e s = 0 0 4 ) 1 " m i n i m u m f o r n p t p r o c e s s c o n n e c t i o n s 2 " m i n i m u m f o r b s p , h y g i e n i c , a n d f l a n g e d p r o c e s s c o n n e c t i o n s 2 " m i n i m u m f o r a l l k y n a r t r a n s d u c e r s a v a i l a b l e e n g l i s h e s p l e n g t h s : 1 " , 2 " , 4 " , 6 " , 8 " , 1 2 " 3 c m t o 3 3 0 c m i n 1 c m i n c r e m e n t s ( e x a m p l e : 6 c e n t i m e t e r s = 0 0 6 ) 3 c m m i n i m u m f o r n p t p r o c e s s c o n n e c t i o n s 5 c m m i n i m u m f o r b s p , h y g i e n i c , a n d f l a n g e d p r o c e s s c o n n e c t i o n s 5 c m m i n i m u m f o r a l l k y n a r t r a n s d u c e r s a v a i l a b l e m e t r i c e s p l e n g t h s : 3 , 5 , 1 0 , 3 0 c m a c t u a t i o n l e n g t h * ( u n i t o f l e n g t h s p e c i f i e d i n s e c o n d d i g i t ) * f l a n g e d k y n a r t r a n s d u c e r s h a v e k y n a r f a c e d 3 1 6 s t a i n l e s s s t e e l f l a n g e s * f o r l e n g t h s l o n g e r t h a n 1 3 0 " ( 3 3 0 c m ) , c o n t a c t t h e f a c t o r y a s t a n d a r d d e s i g n c c r y o g e n i c d e s i g n t o - 1 1 0 f ( - 8 0 c ) ( a v a i l a b l e w i t h m a t e r i a l s c o d e a ) t r a n s d u c e r o p t i o n s
1 0 m o d e l n u m b e r 9 6 2 d u a l p o i n t t r a n s d u c e r 92 a a e n g l i s h ( l e n g t h i n i n c h e s ) m m e t r i c ( l e n g t h i n c e n t i m e t e r s ) t r a n s d u c e r u n i t o f l e n g t h a 3 1 6 / 3 1 6 l s t a i n l e s s s t e e l k 3 1 6 / 3 1 6 l s t a i n l e s s s t e e l , a s m e b 3 1 . 1 & b 3 1 . 3 c o n s t r u c t i o n p c p v c ( u s e o n l y w i t h p r o c e s s c o n n e c t i o n c o d e s 1 1 , 2 3 , 3 3 , 4 3 , b a , c a , d a ) m a t e r i a l s o f c o n s t r u c t i o n 1 1 3 M 4 " n p t 2 1 1 " n p t 2 2 1 " b s p ( g 1 ) t h r e a d e d c o n n e c t i o n s 5 " t o 1 3 0 " i n 1 " i n c r e m e n t s 5 " m i n i m u m f o r n p t p r o c e s s c o n n e c t i o n s 6 " m i n i m u m f o r b s p , a n d f l a n g e d p r o c e s s c o n n e c t i o n s e x a m p l e : 5 i n c h e s = 0 0 5 1 3 c m t o 3 3 0 c m i n 1 c m i n c r e m e n t s 1 3 c m m i n i m u m f o r n p t p r o c e s s c o n n e c t i o n s 1 5 c m m i n i m u m f o r b s p , a n d f l a n g e d p r o c e s s c o n n e c t i o n s e x a m p l e : 1 3 c e n t i m e t e r s = 0 1 3 a d i m e n s i o n a c t u a t i o n l e n g t h * ( u n i t s s p e c i f i e d i n s e c o n d d i g i t ) p r o c e s s c o n n e c t i o n s actuation length a minimum distance between actuation points a and b is 3" (8 cm) maximum distance between actuation points a and b is 125" (318 cm) actuation length b min. 2" (5 cm) i m p o r t a n t : u s e t h e a d i m e n s i o n a s t h e a c t u a t i o n l e n g t h c o d e . t h e b d i m e n s i o n m u s t a l s o b e s p e c i f i e d i n q u o t e / o r d e r . e x a m p l e : f o r a 9 6 2 w i t h a n a d i m e n s i o n o f 1 8 " a n d a b d i m e n s i o n o f 7 " , s p e c i f y a c t u a t i o n l e n g t h c o d e 0 1 8 . 2 3 1 " 1 5 0 # a n s i r f f l a n g e 2 4 1 " 3 0 0 # a n s i r f f l a n g e 2 5 1 " 6 0 0 # a n s i r f f l a n g e 3 3 1 1 M 2 " 1 5 0 # a n s i r f f l a n g e 3 4 1 1 M 2 " 3 0 0 # a n s i r f f l a n g e 3 5 1 1 M 2 " 6 0 0 # a n s i r f f l a n g e 4 3 2 " 1 5 0 # a n s i r f f l a n g e 4 4 2 " 3 0 0 # a n s i r f f l a n g e 4 5 2 " 6 0 0 # a n s i r f f l a n g e a n s i r a i s e d f a c e f l a n g e s b a d n 2 5 p n 1 6 e n 1 0 9 2 - 1 t y p e a b b d n 2 5 p n 2 5 / 4 0 e n 1 0 9 2 - 1 t y p e a b c d n 2 5 p n 6 3 / 1 0 0 e n 1 0 9 2 - 1 t y p e b 2 c a d n 4 0 p n 1 6 e n 1 0 9 2 - 1 t y p e a c b d n 4 0 p n 2 5 / 4 0 e n 1 0 9 2 - 1 t y p e a c c d n 4 0 p n 6 3 / 1 0 0 e n 1 0 9 2 - 1 t y p e b 2 d a d n 5 0 p n 1 6 e n 1 0 9 2 - 1 t y p e a d b d n 5 0 p n 2 5 / 4 0 e n 1 0 9 2 - 1 t y p e a d d d n 5 0 p n 6 3 e n 1 0 9 2 - 1 t y p e b 2 d e d n 5 0 p n 1 0 0 e n 1 0 9 2 - 1 t y p e b 2 e n / d i n f l a n g e s * f o r l e n g t h s l o n g e r t h a n 1 3 0 " ( 3 3 0 c m ) , c o n t a c t t h e f a c t o r y
a g e n c y a p p r o v a l s a g e n c y a p p r o v e d m o d e l s p r o t e c t i o n m e t h o d a r e a c l a s s i f i c a t i o n f m & c s a 9 6 x - x 0 a 0 - x 1 0 e x p l o s i o n p r o o f c l a s s i , d i v . 1 , g r o u p s b , c , & d 9 6 x - x 0 a 0 - x 1 1 c l a s s i i , d i v . 1 , g r o u p s e , f , & g 9 6 x - x 0 a 0 - x 1 2 c l a s s i i i , t y p e 4 x , i p 6 6 , t 6 9 6 x - x 0 a 0 - x 1 3 9 6 x - x 0 a 1 - x 1 0 9 6 x - x 0 a 1 - x 1 1 9 6 x - x d a 0 - x 3 0 9 6 x - x d a 0 - x 3 1 9 6 x - x d a 0 - x 3 2 9 6 x - x d a 0 - x 3 3 9 6 x - x d a 1 - x 3 0 9 6 x - x d a 1 - x 3 1 w i t h t r a n s d u c e r s 9 a x - x x x x - x x x o r 9 m x - x x x x - x x x 9 6 x - x x a x - x x x o r n o n - i n c e n d i v e c l a s s i , d i v . 2 , g r o u p s a , b , c , & d w i t h t r a n s d u c e r s c l a s s i i , d i v . 2 , g r o u p s e , f , & g 9 a x - x x x x - x x x o r c l a s s i i i , t y p e 4 x , i p 6 6 , t 4 9 m x - x x x x - x x x 9 6 x - 5 0 a x - x 1 x i n t r i n s i c a l l y s a f e c l a s s i , d i v . 1 , g r o u p s a , b , c , & d w i t h t r a n s d u c e r s c l a s s i i , d i v . 1 , g r o u p s e , f , & g 9 a x - x x x x - x x x o r c l a s s i i i , t y p e 4 x , i p 6 6 , t 4 9 m x - x x x x - x x x a t e x 9 6 x - x x a x - x c 0 f l a m e p r o o f e x i i 1 / 2 g , e e x d i i c t 6 9 6 x - x x a x - x c 1 9 6 x - x x a x - x c 2 9 6 x - x x a x - x c 3 w i t h t r a n s d u c e r s 9 x x - a x x x - x x x 9 x x - s x x x - x x x 9 x x - b x x x - x x x 9 x x - c x x x - x x x 9 x x - n x x x - x x x 9 x x - k x x x - x x x 9 6 x - 5 0 a x - x a 0 i n t r i n s i c a l l y s a f e e x i i 1 g , e e x i a i i c t 5 9 6 x - 5 0 a x - x a 1 9 6 x - 5 0 a x - x a 2 9 6 x - 5 0 a x - x a 3 w i t h t r a n s d u c e r s 9 x x - a x x a - x x x 9 x x - s x x a - x x x 9 x x - b x x a - x x x 9 x x - c x x a - x x x 9 x x - n x x a - x x x 9 x x - k x x a - x x x m o d e l n u m b e r c o n n e c t i n g c a b l e m a x i m u m l e n g t h : 1 5 0 f e e t m i n i m u m l e n g t h : 1 0 f e e t e x a m p l e : 1 2 f e e t = 0 1 2 c o n n e c t i n g c a b l e l e n g t h ( f e e t ) 037 331 6 r e m o t e c a b l e f o r m o d e l 9 6 1 7 r e m o t e c a b l e f o r m o d e l 9 6 2 e l e c t r o n i c s m o d e l 1 1 these units a re in compliance with: 1. the emc dir ective: 89/336/eec. the units have been te s ted to en 61326. 2. directive 94/9/ec for equipment or protective system for use in potentially explosive atmosphe res. 0344
bulletin: 51-137.3 effective: august 2011 supersedes: november 2009 the quality assurance system in place at magnetrol ? guarantees the highest level of quality throughout the company. magnetrol is committed to providing full customer satisfaction both in quality products and quality service. the magnetrol quality assurance system is registered to iso 9001 affirming its commitment to known international quality standards providing the strongest assurance of product and service quality available. several echotel model 961 units are available for quick shipment, usually within one week after factory receipt of a complete purchase order, through the expedite ship plan (esp). to take advantage of esp, simply match the color coded model number codes (standard dimensions apply). esp service may not apply to orders of ten units or more. contact your local representa- tive for lead times on larger volume orders, as well as other products and options. e e xpedite s s hip p p lan all magnetrol electronic level and flow controls are warranted free of defects in mate- rials or workmanship for one full year from the date of original factory shipment. if returned within the warranty period; and, upon factory inspection of the control, the cause of the claim is determined to be covered under the warranty; then, magnetrol will repair or replace the control at no cost to the purchaser (or owner) other than transportation. magnetrol shall not be liable for misap- plication, labor claims, direct or consequen- tial damage or expense arising from the installation or use of equipment. there are no other warranties expressed or implied, except special written warranties covering some magnetrol products. 5300 belmont road ? downers grove, illinois 60515-4499 ? 630-969-4000 ? fax 630-969-9489 ? www.magnetrol.com 145 jardin drive, units 1 & 2 ? concord, ontario canada l4k 1x7 ? 905-738-9600 ? fax 905-738-1306 heikensstraat 6 ? b 9240 zele, belgium ? 052 45.11.11 ? fax 052 45.09.93 regent business ctr., jubilee rd. ? burgess hill, sussex rh15 9tl u.k. ? 01444-871313 ? fax 01444-871317 copyright ? 2011 magnetrol international, incorporated. all rights reserved. printed in the usa. performance specifications are effective with date of issue and are subject to change without notice. for additional information, see instruction manual 51-646. q u a l i t y e s p w a r r a n t y magnetrol, magnetrol logotype and echotel are registered trademarks of magnetrol international, incorporated. kynar? is a registered trademark of elf atochem north america, inc. hastelloy? is a registered trademark of haynes international, inc. (delaware corporation). monel? is a registered trademark of the inco family of companies. tri-clamp? is a registered trademark of ladish co. varivent? is a registered trademark of tuchenhagen gmbh ltd

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