A range of gas sensors from Figaro utilising tin dioxide (SnO2) semiconductor technology. In clean air the devices have low conductivity which increases in the presence of a detectable gas. A simple electrical circuit can be used to convert the change in conductivity to an output signal proportional to gas concentration. Types TGS822 & TGS823 have high sensitivity to the vapours of organic solvents and a variety of combustible gases such as carbon monoxide, making them good general purpose sensors; type TGS823 has a ceramic base able to withstand temperatures of up to 200°C.
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Technical Specifications
Figaro TGS822 technical specifications.
General
Height
10mm
Product Type
Organic Solvent Vapors Sensor
Sensing Element Material
Tin dioxide (SnO2) semiconductor
Sensing Element Description
SnO2 sintered to form a thick film on the surface of an alumina ceramic tube containing an internal heater
Cap Material
Nylon 66
Sensor Base Material
Nylon 66
Flame Arrestor Material
100 mesh SUS 316 double gauze
Features - Sensitivity
High sensitivity to organic solvent vapors such as ethanol
Features - Stability and Reliability
High stability and reliability over a long period
Features - Life and Cost
Long life and low cost
Features - Electrical Circuit
Uses simple electrical circuit
Application
Breath alcohol detectors
Application
Gas leak detectors/alarms
Application
Solvent detectors for factories, dry cleaners, and semiconductor industries
Heater Voltage (VH) Rated Value
5.0±0.2V
Heater Voltage Type
AC or DC
Circuit Voltage (Vc) Rated Value
Max. 24V
Circuit Voltage Type
DC only
Power Dissipation across Sensor Electrodes (Ps) Constraint
≤15mW
Load Resistance (RL) Rated Value
Variable, 0.45kΩ min
Sensor Resistance (Rs) at 300ppm Ethanol
1KΩ ~ 10KΩ
Change Ratio of Sensor Resistance (Rs/Ro) at 300ppm Ethanol / 50ppm Ethanol
0.40 ± 0.10
Heater Resistance (RH) at Room Temperature
38.0 ± 3.0Ω
Heater Power Consumption (PH) at VH=5.0V
660mW
Standard Test Conditions - Temperature
20±2°C
Standard Test Conditions - Humidity
65±5%R.H.
Standard Test Conditions - Circuit Voltage (Vc)
10.0±0.1V
Standard Test Conditions - Heater Voltage (VH)
5.0±0.05V
Standard Test Conditions - Load Resistance (RL)
10.0kΩ±1
Standard Test Conditions - Preheating Period
More than 7 days
Sensor Resistance (Rs) Calculation Formula
Rs = (Vc/VRL - 1) x RL
Power Dissipation (Ps) Calculation Formula
Ps = (Vc^2 * Rs) / (Rs + RL)^2
Compliance
RoHS
Compliant
Datasheet
Figaro TGS822 Datasheet
Download the complete datasheet for Figaro TGS822 to view detailed technical specifications.
This datasheet cannot be embedded due to technical restrictions.
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