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Portable Gas Detectors

GW-3 Wearable Miniature Personal Single Gas Monitors

Wearable Gas Detectors -- 45g smallest and lightest available, CO / O2 / H2S / Dual O2 /CO and CO-H2 options

Gas Watch 3 ( GW-3 ) Series are among the smallest and lighest Gas Detectors on the market weighing just 45g ideal for wearing on lapel in the breath zone and even inside helmets and other protective headgear.

Facilities such as Oil Refineries, Petrochemical Storage Facilities, Water and Wastewater Treatment plants, Pharmaceutical labs, Utilities, Fire fighting and Chemical Plants are hazardous areas. Workers and Visitors need personal gas protection at all times without the addition of extra bulky equipment. Personal Single Gas Monitors are ideal for this.

Product Features

GW-3 Personal Single Gas Detectors

Cost of Ownership

Disposable gas detectors are low cost but users can suffer high failure rates, this can result in safety concerns. Users often find the cost of ownership often outweighs the small initial cost saving over a reliable renewable gas detector. Customers constantly have to replace failed units resulting in personnel down time and the lost productivity.

Personal Single Gas Monitors

The Riken Keiki GW3 series are personal single gas monitors designed for protection from exposure to, Oxygen Deficiency, Hydrogen Sulphide, and Carbon Monoxide. Customers can specify models for O2, H2S, CO, CO with reduced H2 interference, & CO detection. Users of the GW-3 series find the units are robust, reliable, long-lasting, and cost effective. In addition they have a digital display, can be calibrated, are dust and water-resistant (IP-68), and users can data log from 5 to 300 hours with adjustable intervals.

Personal Single Gas Monitors

The GW-3 series personal single gas monitors have 3 x pre-set alarms. The user can adjust the alarms to their own levels if desired. Each version is equipped with visual, audible, and vibration alarms as standard. The replacement sensors are inexpensive. Users can replace the sensors in the field. Customers can expect Sensors to have a life expectancy typically of 3-5 years in addition they are interchangeable with other Riken Keiki monitors.

GW-3 Personal Single Gas Detectors


Category Portable gas detector
Type Single Gas / Multi Gas
Gas type Oxygen/Toxic
Detection gas O2/CO/H2S
Principle of detection Galvanic cell type(O2)
Electrochemical type(other)
Sampling method Diffusion
Display of alarm Flashing light / buzzer / vibration
Explosion protected construction Intrinsically safe
Explosion-proof class ATEX: Ⅱ1G Ex ia ⅡC T4 Ga
IECEx: Ex ia ⅡC T4 Ga
IP rating IP66/68(2m, 1h)
Approvals IECEx/ATEX/CE
Power source CR2450 coin type lithium ion battery
Dimensions Approx. 63mm(W) x 42mm(H) x 22mm(D)(excluding projections)
Weight Approx. 45g
Operating temperature range -20℃ to +50℃ (no sudden changes)(O2)
-20℃ to +50℃ (no sudden changes)(Approx.15-minute temporary use environment:-20℃ to +60℃[no sudden changes])(other)
Operating humidity range 10 to 90%RH (no condensation)(O2)
10 to 90%RH (no condensation)(Approx.15-minute temporary use environment:0 to 95%RH[no condensation])(other)

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