Hydrogen Gas Sensor - TGS821

Features of Hydrogen Gas sensor TGS821:
Detection range ; 10-10000ppm
Circuit voitage : 5.0±0.2VDC/AC
Heater current : 180mA
High sensitivity to hydrogen gas
High sensitivity to gaseous air contaminants
Uses simple electrical circuit
Ceramic base resistant to severe environment

  • Model Number: TGS821
Quantity:
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  • Hydrogen Gas Sensor
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Product Specification


Features

*High sensitivity and selectivity to hydrogen gas
*Good repeatability in measurement and excellent stability
*Uses simple electrical circuit
*Ceramic base resistant to severe environment

Application examples

Hydrogen gas detection for:
-transformer maintenance
-batteries
-steel industry usage
-etc.

Specifications

Target gases Hydrogen
Typical detection range 30-1,000ppm
Sensing principle MOS type 
Driving voltages Heater Voltage:5.0V
Circuit Voltage:Max24V
Power consumption 660mW (typical)
Dimensions φ19.5×16.5mm
Weight Approx. 7.7g

The sensing element of Figaro gas sensors is a tin dioxide (SnO2) semiconductorwhich has low conductivity in clean air. In the presence of a detectable gas, the
sensor's conductivity increases depending on the gas concentration in the air. Asimple electrical circuit can convert the change in conductivity to an output signal
which corresponds to the gas concentration.
The TGS 821 has high sensitivity and selectivity to hydrogen gas. The sensor candetect concentrations as low as 50ppm, making it ideal for a variety of industrial
applications. 



Standard Test Conditions:
TGS 821 complies with the above electrical characteristics
when the sensor is tested in standard conditions as specified
below:
Test Gas Conditions: 20°±2°C, 65±5%R.H.
Circuit Conditions: VC = 10.0±0.1V (AC or DC),
VH = 5.0±0.05V (AC or DC),
RL = 4.0kΩ±1%
Preheating period before testing: More than 7 daysStandard Test Conditions:
TGS 821 complies with the above electrical characteristics
when the sensor is tested in standard conditions as specified
 


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