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 |
| General | Warranty information available in Standard Terms and Conditions of Sale of Figaro USA Inc. |
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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