Friday, February 25, 2011

TGS 2442 - for the detection of Carbon Monoxide

TGS 2442 - for the detection of Carbon Monoxide by Figaro

TGS 2442 utilizes a multilayer sensor structure.  A glass layer for thermal insulation     is printed between a ruthenium oxide (RuO2)      heater and an alumina substrate.    A  pair of Au electrodes for the heater are formed on a thermal insulator. The gas sensing layer, which is formed of tin dioxide (SnO2), is printed on an electrical insulation layer which covers the heater.    A pair of Au electrodes for measuring sensor resistance  are formed on the electrical insulator. Activated charcoal is filled between the internal cover and the outer cover for the purpose of reducing the influence of noise gases.  
TGS 2442  displays good selectivity to carbon monoxide, making it ideal for CO monitors.  In the presence of CO, the sensor's conductivity increases depending on the gas concentration in the air.  A simple pulsed electrical circuit operating on a one second circuit voltage cycle can convert the change in conductivity to an output signal  which corresponds to gas concentration.

        * Low power consumption                                            
        * High sensitivity/selectivity to carbon monoxide (CO)                                      
        * Miniature size
        * Low sensitivity to alcohol vapor
        * Long life and low cost
        * Low humidity dependency
 * CO detectors 
 * Air quality controllers 
 * Indoor parking lot ventilation