Gas detection3
Respiratory protection4
Technical rescue9
Firefighting4
Safety & environment4
Personal protective equipment2
WatchGas PDM DUO — portable two-gas detector
The WatchGas PDM DUO is a compact two-gas detector for personal protection, monitoring two hazards simultaneously (e.g. oxygen + a combustible or toxic gas). It uses electrochemical and NDIR (for CO₂) sensors, diffusion measurement, IR connectivity for configuration and data download, and a triple alarm (visual, audible 95 dB, vibration). A replaceable battery provides up to 2 years of operation.
The WatchGas PDM DUO is a compact two-gas detector for personal protection, monitoring two hazards simultaneously (e.g. oxygen + a combustible or toxic gas). It uses electrochemical and NDIR (for CO₂) sensors, diffusion measurement, IR connectivity for configuration and data download, and a triple alarm (visual, audible 95 dB, vibration). A replaceable battery provides up to 2 years of operation.
Key features
- Measurement of 2 gases simultaneously (O₂, CO, CO₂, CH₄/LEL, H₂S, NO₂, SO₂).
- Electrochemical + NDIR (CO₂) sensors; diffusion measurement.
- IR connectivity (configuration and data download via IR-LINK).
- Triple alarm: visual, audible 95 dB @ 30 cm, vibration.
- Replaceable battery — up to 2 years of operation; IP67.
- ATEX/IECEx Ex ia IIC T4 Ga; logging of the last 30 alarms.
Technical specification
| Parameter | Value |
|---|---|
| Type | portable two-gas detector (diffusion) |
| Measured gases | 2 of: O₂, CO, CO₂, CH₄, H₂S, NO₂, SO₂ |
| Dimensions / weight | 56 × 89 × 21 mm / 200 g |
| Protection | IP67 |
| Battery | replaceable Li/SOCl₂ 3.6 V; ~2 years |
| Temperature | −20 to +50 °C |
| Manufacturer | WatchGas |
Applications
Personal protection with simultaneous monitoring of two gas hazards in hazardous environments.
Frequently asked questions (FAQ)
Which gas pairs does the PDM DUO measure?
Two at once from the configuration, e.g. O₂+CO, O₂+CH₄, O₂+CO₂ or SO₂+H₂S.
How long does it last?
Up to 2 years on a replaceable battery (less for the combustible-gas version).
Brand and service
WatchGas — SafeTech is the distributor and service station: selection, supply, configuration, calibration and service of WatchGas detectors and systems.
Why SafeTech
- 23 years of experience in gas detection (in business since 2003).
- Distributor and service station.
- In-house service, calibration and certification in Suchy Dwór near Gdynia — nationwide coverage in Poland.
- Training and technical support (SafeTech Safety Academy).
Availability and service — Gdynia and the Tricity
WatchGas PDM DUO — portable two-gas detector — sales, selection, calibration and service in Gdynia (Suchy Dwór, on the border of Gdynia and the Kosakowo municipality). We serve the Tricity (Gdańsk, Sopot, Gdynia), Rumia, Reda, Wejherowo, the Pomeranian Voivodeship and all of Poland. Ask about pricing and availability.
Accessories and compatible equipment
- Calibration & bump test: stacja WatchGas Mono/Multi Dock, calibration gas mixtures, regulators and pressure-reducing valves for cylinders.
- Sensors & filters: replacement sensors matched to the measured gas, dust and hydrophobic filters.
- Sampling: probe, hose, aspirator bulb (for diffusion versions).
- Carrying & protection: lanyard, clip, holder, transport case, charger/power supply.
Full selection of accessories and parts for this model — request a quote.
