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:
- - +
Product Specification
Features
*Good repeatability in measurement and excellent stability
*Uses simple electrical circuit
*Ceramic base resistant to severe environment
Application examples
-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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