The TGS 832 is a sensor designed for the detection of Chlorofluorocarbons (CFC's), with high sensitivity and quick response characteristics. It is suitable for refrigerant leak detection, especially with high sensitivity to R-134a.
The Figaro TGS 832 is a tin dioxide (SnO₂) semiconductor gas sensor designed for high sensitivity to halogenated refrigerants. It provides a simple electrical circuit that converts changes in sensor resistance into an output voltage proportional to gas concentration.
The document includes application notes, typical sensitivity curves, temperature/humidity dependency, pin connections, basic measuring circuit, and mechanical dimensions. It also lists the standard test conditions and electrical characteristics required for reliable operation.
| Sensitivity (Rs/Ro) | 0.50 – 0.65 |
|---|---|
| Heater voltage | 5 V ± 0.2 V (DC/AC) |
| Sensor base material | Alumina ceramic |
The heater should be powered with 5 V ± 0.2 V (DC or AC).
When the sensor is connected as shown, the voltage across the load resistor (V_RL) increases as the sensor resistance (Rs) decreases with higher gas concentration.