high temperature probes ntc type htp series description the ntc type htp series high temperature probe consists of a bead thermistor hermetically sealed in the tip of a shock resistant glass rod. these units are rugged and unaffected by severe environmental exposures, including high density nuclear radiation. applications ? temperature measurement and control ? temperature compensation ? controlled temperature soldering stations ? process oven control a rugged high temperature bead thermistor (type htbr55) is available on special order data all ntc type htp series high temperature probes are aged at 842f (450c) for extended periods of time. as such, they exhibit excellent stability for all temperatures at or below 842f (450c). intermittent operations at temperatures up to 1112f (600c) is permissible. when additional preconditioning is specified, compliance with the performance requirements of mil-prf-23648 can be guaranteed. a mphenol advanced sensors
type htp series specifications thermal and electrical properties the following table lists the thermal and electrical proper - ties for all high temperature probes. all defnitions and test methods are per mil-prf-23648. table a probe length options thermistor type htp60 htp65 htp85 htp100 maximum diameter 0.060 in (1.5 mm) 0.065 in (1.7 mm) 0.085 in (2.2 mm) 0.100 in (2.5 mm) standard length code b 0.250 in (6.3 mm) 0.250 in (6.3 mm) 0.250 in (6.3 mm) 0.250 in (6.3 mm) length codes available (special order only) a, c, d a, c, d a, c, d a, c, d lead-wires nominal diameter 0.008 in (0.20 mm) 0.008 in (0.20 mm) 0.008 in (0.20 mm) 0.008 in (0.20 mm) minimum lead length 0.250 in (6.3 mm) 0.250 in (6.3 mm) 0.250 in (6.3 mm) 0.250 in (6.3 mm) lead material platinum alloy platinum alloy platinum alloy platinum alloy thermal time constant still air at 77f (25c) 12 seconds 13 seconds 16 seconds 22 seconds dissipation constant still air at 77f (25c) 0.60 mw/c 0.65 mw/c 0.80 mw/c 1.0 mw/c resistance range at 257f (125c) ohms (s) maximum power 100 k to 2 m 100 k to 2 m 100 k to 2 m 100 k to 2 m rating 0.060 watts 0.065 watts 0.075 watts 0.100 watts data table b temp f (c) rt/r125 temp f (c) rt/r125 257 (125) 1.00000 572 (300) 0.00793 302 (150) 0.41087 617 (325) 0.00487 347 (175) 0.18272 662 (350) 0.00310 392 (200) 0.08720 707 (375) 0.00203 437 (225) 0.04430 725 (400) 0.00138 482 (250) 0.02380 797 (425) 0.00096 527 (275) 0.01344 842 (450) 0.00068 ntc type htp series dimensions
type htp series specifications the code number to be ordered may be specifed as follows: htp high temperature probe code diameter 60 60 mils 65 65 mils 85 85 mils 100 100 mils code probe length* a 0.125 in (3.17 mm) b 0.25 in (6.35 mm) standard d 0.5 in (12.7 mm) code material system d -- code resistance rt @ 257f (125c)** 514 510 ks 754 750 ks 105 1.0 ms 155 1.5 ms code tolerance*** f 1 g 2 j 5 k 10 l 15 m 20 n 25 p 30 q 40 r 50 s non-standard (consult factory) htp - ____ - ____ - ____ - ____ - ____ typical model number *the nominal standard value for the zero-power resistance at 257f (125c). **the zero-power resistance at 77f (25c), expressed in ?, is identifed by a three digit code number. the frst two digits represent signifcant fgures, and the last digit specifes the number of zeros to follow. example: 0.06 in (1.5 mm) maximum diameter x 1/4 in (6.35 mm) long glass probe with a zero-power resistance at 257f (125c) of 510 k and a tolerance of 20% would be specifed as htp60bd514m. ***special tolerances are available on request . consult the factory for special resistance tolerances, non-standard resistances and/or non-standard temperatures. ordering information
aas-920-268a-04/2014 www.amphenol-sensors.com ? 2014 amphenol corporation. all rights reserved. specifcations are subject to change without notice. other company names and product names used in this document are the registered trademarks or trademarks of their respective owners. a mphenol advanced sensors
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