WatchGas SST1E XS Single Sensor Gas Detector

What is the Xs Gas Sensor?

The Xs sensor is a high-stability broad-band sensor for certain organic gases and vapors.

Unlike a dedicated sensor that measures only one gas (such as carbon monoxide, hydrogen sulfide, or chlorine), the Xs sensor is a broad-spectrum toxic vapor sensor. It is intended to provide an early warning when workers are exposed to a range of volatile organic compounds (VOCs) or solvent vapors.

The Xs sensor is capable of monitoring gas concentrations from 0 to 100 ppm, providing precise readings with 0.5 ppm resolution. To help protect workers in the field, the SST1E triggers alarms at 25 ppm and 50 ppm, offering clear warning points before exposure levels become more serious.

Why Use an Xs Sensor Instead of a Specific Gas Sensor?

A conventional single-gas detector is highly selective:

• CO sensor → Carbon monoxide only
• H₂S sensor → Hydrogen sulfide only
• Cl₂ sensor → Chlorine only

The Xs sensor is different because it acts more like a general toxic organic vapor monitor. This can be useful when workers may encounter multiple solvents or organic chemicals and it is impractical to carry a dedicated detector for each compound.

SST1E Features Relevant to the Xs Sensor

The SST1E platform adds several features that enhance the usefulness of the Xs sensor:

• Replaceable sensor and battery
• Up to 3-year battery runtime
• Real-time concentration display
• STEL (Short-Term Exposure Limit) tracking
• TWA (Time-Weighted Average) tracking
• Event logging
• NFC communication
• Compatibility with the WatchGas safety ecosystem (dock, app, kiosk, RTR software)