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WatchGas PDM+ Sustainable unit


PDM+ is a single sustainable gas monitor designed to detect oxygen deficiency or the presence of toxic gas in the ambient environment. The PDM+ is sustainable, hence its battery and sensor can be replaced. When turned on, PDM+ continuously monitors ambient air for the presence of a specific gas and alerts the user to potentially unsafe exposure with LED, vibrating, and audible alarms. After use, the instrument can be turned off, making

the battery last up to three years.

The PDM+ is easy to wear, the backside of the device has a strong metal clip to secure the monitor to a shirt, belt or helmet. The PDM+ devices are compatible with WatchGas Docking Station and WatchGas IR Link. Both devices provide the function to download the data of the PDM+ single-gas monitor. The 30 most recent events will be stored on an internal event logger.

PDM+ can be calibrated or bump tested manually. The PDM Family Multi EDocking Station will automatically calibrate four devices simultaneously, which reduces downtime and gas consumption.

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  • Sensor reliability for H2S, CO, O2, SO2, NH3, H2, H2O2 & NO2

  • Adjustable alarm set points

  • Real-time gas reading capability

  • 0.1 ppm resolution for H2S sensor and display

  • Two-way IR communication for event downloads, bump tests & updates

  • Programmable unit identification

  • Fast bump test with Docking and Calibration

  • “Bump check” confirmation/identification

  • IP67

  • ATEX Zone 0

  • Has TWA & STEL

  • Replaceable battery

  • H2S: 0-100 ppm

  • CO: 0-500 ppm

  • CO High: 0-2000ppm

  • O2: 0-30% vol

  • H2: 0-1000ppm

  • SO2:0-50ppm

  • NH3:0-100ppm

  • NO2:0-20ppm



  • ATEX: II 1 G T4 Ex ia IIC T4 Ga

  • IECEx: EX ia IIC T4 Ga

  • InMetro: Ex ia IIC T4 Ga (-40 ̊C (H2S,CO,H2, SO2, NH3, NO2) / -35 ̊C (O2) ≤ Ta ≤ +50 ̊C) 

  • CE: Conformité Européenne


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