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Flexible Gas Detection
Brand: WatchGas Detection
Made in: Netherlands

The AirWatch is your safe area solution for the monitoring of various gases. Based on the measurement values and alarms, equipment is switched on or off, data is logged and optionally employees are remotely informed of the gas concentrations present.


AIRWATCH MK1.2 Main Features

  • Functions in standalone mode or as part of a mesh network;
  • Automatically switches pumps, on/off buttons, ventilation, etc.;
  • Developed for demanding environments;
  • Can be used inside and outside;
  • Flexible and programmable;
  • Built-in pump;
  • Available with battery pack;
  • (continuous wireless for 8 days), alarms, data log, repeater, command center; uninterrupted power supply (UPS), etc.
  • Able to measure the following: CO, CO LR, CO HR, H2S, H2S HR, SO2, NH3, HCN, PH3, CL2, NO2, NO, LEL-CAT, LEL-


The AirWatch is a safe area monitor with pump, controller, alarm and switch. It can switch on a wide variety of equipment in the event of a gas alarm, from generators to breathing air units and power supplies. With the optional wireless function, you can also view monitor several AirWatches. The data is stored on the PC/laptop or on an SD card in the device itself, with real-time information giving a clear picture of the different locations. Many configurations are possible, so the AirWatch can be used very flexibly, either in standalone mode or as part of a complete system.

Detector Specifications

Size 280mm x 165mm x 137mm
Weight 2.0 kg
Fixation Standard backplate with 2 magnets
Sensors (see sensor specifications) 4 gases, 1 high power socket
Visible Alarms Green LED for SAFE Indication
RED LED for ALARm indication
Optionsl 107dB Beacon Sounder (item nr. AIR-BEAC-010)
System Communication Stand-alone via cable type 1 or 2, RS 485 or wireless via 2.4 GHz ISM band, complies with the IEEE 802. 15.4 standard and 3/4G with the WatchGas remote online platform.
Range Wireless 300m (line of sight) (2.4 GHz)
Communication Max. 50 remote detectors in one system
Keys and Display 2 magnet reed contact swiches
LCD text screen with 2 lines and background lighting
Sampling Pump Built-in pump
Energy Supply 9-36V DC. Backup battery is basic included
Battery run-on time max. 60 min
Potential Free Contact Three programmable contacts rated
Maximum 24V DC 2A
Operation Temperature -20°C  to +45°C
Humidity 0-95% RH (non-condensing)
Data Logging SD card logging
IP-Rating IP65


Sensor Specifications

Gas Detectable Gas Range Resolution Response Time T90
CO 0-2000 ppm 1 ppm < 30s
CO LR 0-200 ppm 20 ppb < 20s
CO HR 0-10000 ppm 5 ppm < 50s
CO comp. H2 0-2000 ppm 1 ppm < 30s
H2S 0-100 ppm 0.1 ppm < 30s
H2S HR 0-2000 ppm 1 ppm < 25s
SO2 0-50 ppm 0.1 ppm < 35s
NH3 0-100 ppm 0.1 ppm < 80s
HCN 0-100 ppm 0.1 ppm < 70s
PH3 0-10 ppm
0-2000 ppm
0.01 ppm < 60s
CL2 0-50 ppm 0.01 ppm < 60s
NO2 0-20 ppm 0.01 ppm < 50s
NO 0-250 ppm 0.2 ppm < 45s
LEL-Cat 0-100% 1% <10s for CH4
LEL-NDIR 0-100% 1% <10/30s for CH4
CO2-NDIR-LR 0-10000 ppm 10 ppm < 30s
CO2-NDIR 0-5% 0.01% < 30s
CO2-NDIR HR 0-100% 0.1% < 30s
O2 0-25% 0/01% < 15s
PH3 - HR* 0-2000 ppm 1 ppm Response Unknown
SO2 - LR 0-50 ppm 0.01 ppm < 30s
THT 0-50mg³ 0.3mg³ < 60s
PID 0-20 ppm 0.01 ppm < 5s
PID 0-1000 ppm 0.2 ppm < 3s
PID 0-10000 ppm 2 ppm < 3s
H2 * 0-2000 ppm 1 ppm < 35s
ETO * 0-100 ppm 1 ppm < 300s

Check AirWatch Sensor Specifications sheet for detailed sensor information
* For PH3 HR, H2 and ETO, please check at WatchGas for availability

Product Application:

  • Turning off generators, power units, welding transformers, breathing air units, pumps, etc.
  • Monitoring of closed spaces and areas/li>
  • Cleaning activities
  • Water purification
  • Petrochemical industry
  • Shipyards
  • Shutdowns
  • Transportation, distribution, offloading
  • Container) fumigation
  • Hospitals
  • Construction and earthmoving

The contents are subject to change without prior notice.


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