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GasWatch 3 Single Gas Detector

The GasWatch 3 Single Gas Detector is the world’s smallest and lightest single-gas monitor.

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The GasWatch 3 Single Gas Detector is the world’s smallest and lightest single-gas monitor. Weighing just 1.6 ounces, its compact form affords great comfort and flexibility in how you choose to wear it. It can be worn on your wrist as a watch, or clipped into your breathing zone on your lapel, hard hat or other safety equipment with its alligator clip.

The 5 different GasWatch 3 models can protect you from oxygen deficiency, exposure to carbon monoxide or exposure to hydrogen sulfide. A hydrogen compensated model can protect those who work in steel mills, refineries or other environments where hydrogen is present from carbon monoxide exposure. The dual sensor model can simultaneously protect you from oxygen deficiency and carbon monoxide exposure.

A small, field-replaceable, coin-type lithium-ion battery gives the GasWatch 3 over 4,000 hours of continuous operation. The hydrogen compensated CO can operate up to 2,500 hours, and the dual sensor CO/O2 model will get up to 2,000 hours of continuous operation.

The great battery life coupled with a 3-year warranty* gives the GasWatch 3 tremendous value and a low cost of ownership.


Tags: CO Carbon Monoxide Gas Detector, H2S Hydrogen Sulfide Gas Detector, O2 Oxygen Gas Detector


  • 5 versions available
  • 3 year warranty, 2 year warranty for Oxygen
  • Up to 4,000 hours of operation
  • Light and compact “watch type” design
  • Comfortably wear in your breathing zone
  • Available with a watch band or alligator clip
  • Automatic backlight during alarm
  • Sturdy IP-66/68 rated design
  • Water, dust and radio frequency resistant
  • Non-compliance indicator


Sample Method Diffusion
Operating Time Hydrogen Sulfide & Carbon Monoxide: 4,000 hours
Carbon Monoxide, H2 Compensated: 2,500 hours
Carbon Monoxide & Oxygen: 2,000 hours
Oxygen: 4,000 hours
Alarm Gas Alarm: 1st, 2nd, 3rd (user adjustable), OVER alarm, STEL and TWA
Trouble Alarm: Sensor connection, low battery, circuit failure and calibration range error
Battery CR2450 coin-type lithium-ion battery
Display Digital LCD, gas name & concentration, auto backlighting during alarm, operation icon, battery icon
Alarm Flashing LEDs
Functions Datalogger, vibration, STEL alarm, TWA alarm, quick calibration, peak value display, temperature display
Enclosure IP-66/68
Temperature -20 to 50°C
Humidity 10% to 90% relative humidity (non-condensing)
Intrinsic Safety ATEX, IECEx, CSA
Size 2.5″ x 1.6″ x .86″
Weight 1.6 ounces
Warranty 3 Year warranty, 2 Years for Oxygen sensors

Sensor Specifications

Carbon Monoxide (CO)
0 – 2,000 ppm
25 ppm/50 ppm
Hydrogen Sulfide (H2S)  0 – 200 ppm 5.0 ppm/30 ppm
Oxygen (O2)  0 – 40% Vol 19.5 % Vol/18.0% Vol

Ordering Information

. Catalog No. Description Price Quantity .
GasWatch for Carbon Monoxide gas meter
GasWatch Wrist Band
GasWatch for Carbon Monoxide gas meter
GasWatch Wrist Band
GasWatch for CO and oxygen gas meter
GasWatch Wrist Band
GasWatch for Hydrogen sulfide
GasWatch Wrist Band
GasWatch Oxygen gas detector
GasWatch Wrist Band


GasWatch 3 Single Gas Monitor Datasheet

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