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Data Sheet Ref: 90500997 Issue: 5.1
GS-AQ911
www.sontay.com
Space air quality transmitter
Technical Overview
The GS-AQ911 is wall-mounting air quality transmitter designed for use for the control of fresh air for ventilation purposes. The GS-AQ911 measures the level of contaminant gases in an air sample, and is sensitive to most heavy odours, smoke, solvent gases etc., providing an output proportional to the mixed gas concentration. This signal can be used to control fresh air fans and dampers according to the ventilation load. Where the primary contaminant load is human respiration, it is recommended that a Carbon Dioxide transmitter is used.
Features * *
Low cost air quality measurement Detects particulates such as cigarette smoke
Specification
Sensor reference Cal. accuracy Re-calibration Housing material Dimensions Ambient: Temperature RH Power supply Output 15C to 30C 45 to 65% RH 24Vac/dc (10%) @ 45mA 0-10Vdc (0v = Lo contamination) (10Vdc = Hi contamination) Country of origin UK Tin Dioxide film 5% of reading 2 years Flame retardant ABS 85mm x 85mm x 27mm
Product Codes
GS-AQ911 Space air quality transmitter
International Tel: +44 1732 861225 UK Sales Tel: 0845 345 7253
Page 1
International Fax: +44 1732 861226 UK Sales Fax: 0845 345 7353
Whilst every effort has been made to ensure the accuracy of this specification, Sontay cannot accept responsibility for damage, injury, loss or expense resulting from errors or omissions. In the interest of technical improvement, this specification may be altered without notice.
Data Sheet Ref: 90500997 Issue: 5.1
GS-AQ911
www.sontay.com
Space air quality transmitter Connections
Installation
1. Undo the tamperproof screw at the bottom of the housing and gently pull the front panel from the base. Using the base as a template mark the hole centres and fix to the wall with suitable screws. Alternatively the base plate can be mounted on to a conduit box or a standard recessed back box. Feed cable through the 22mm knockout in the base of the housing and terminate the cores at the terminal block. Leaving some slack inside the unit. Replace the housing to the base plate. Fit the tamperproof screw (if required) through the lug at the bottom of the base plate. Power the unit with 24Vac/dc and after a stabilising period of 2-3 minutes functionality checks can be made. Pre-commissioning checks are made after approximately 30 minutes. Final commissioning should only be carried out after the unit has been running for a minimum of seven days.
2.
3.
LK1
4. 5.
6.
7.
Output +24V 0V
Operation
The GS-AQ911 space air quality transmitter is most suited to areas such as common rooms, canteens, office spaces and other areas where pollutants given off by occupants are of concern.
LK2
LK2 can be ON for response damping or OFF for no dampThe typical pollutants of which the GS-AQ911 would monitor are body odours, methane, solvent gases, cigarette smoke, carbon monoxide, alcohol, perfume and most other heavy odours related to high occupancy. The normal operation of the GS-AQ911 is to set the dampers to minimum fresh air at below 2Vdc. As the signal increases, dampers should be modulated to fully open at 810Vdc. ing. NB Jumper LK1 should not be changed.
Trend Scaling
Typically, the output could be scaled for 0 to 100% contamination. Brange Trange Upper Lower -100 100 100 0
Exponent 3
International Tel: +44 1732 861225 UK Sales Tel: 0845 345 7253
Page 2
International Fax: +44 1732 861226 UK Sales Fax: 0845 345 7353
Whilst every effort has been made to ensure the accuracy of this specification, Sontay cannot accept responsibility for damage, injury, loss or expense resulting from errors or omissions. In the interest of technical improvement, this specification may be altered without notice.

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