Weatherall Equipment & Instruments Ltd : Gas Detection - Single-gas Portable Monitors


	Single-gas Portable Monitors
	01 Series
	GasWatch Series
	Eagle
	Multi-gas Portable Monitors
	Fixed-gas Detection Systems

	Oxygen Monitors
	Toxic Gas Monitors
	Combustible Gas Monitors
	Infrared Gas Monitors
	Optical Gas Indicators
	Hydride Gas Monitors

	Specialist Applications


	Model:

Acrylic

Gas Detection

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Single-gas Portable Monitors » Riken Keiki GasWatch

Features

Hands free gas monitoring
3 Gases to choose from:
CO, H2S, or O2
Compact "watch type" design
Vibration, visual and audible
alarms standard
Over 3,000 hours of operation
from 1 battery
Fast, accurate response with
digital LCD display
Fits on your arm, wrist, belt or
hard hat
Manual backlight
(Automatic light during alarm)
Sensor fail alarm
PEAK hold function
(Max. value during operation)
TWA and STEL function
Displays current time
2 Year warranty

Application

Worker Safety
Chemical Plants
Hazardous Waste Sites
Mines
Tunnels
Sewage Treatment Plants

Specifications

Model Name (Part #)	GW-2X 72-0007RK	GW-2H 73-0041RK	GW-2C 73-0040RK
Measuring Gas	Oxygen (O₂)	Hydrogen Sulfide (H₂S)	Carbon Monoxide (CO)
Detection Principle	Galvanic cell	Electrochemical
Sensor Type	OS-BM2	ES-1827	ES-1821
Measuring Range (Increments)	0 - 40.0% vol. (0.1% vol.)	0 - 100.0 ppm (0.5 ppm)	0 - 500 ppm (1 ppm)
Alarm Points (Factory Set)	Low - 19.5% vol. High - 23.5% vol. Over - 40.0% vol.	1st - 10.0 ppm 2nd - 30.0 ppm TWA - 10.0 ppm STEL - 15.0 ppm Over - 100.0 ppm	1st - 25 ppm 2nd - 50 ppm TWA - 25 ppm STEL - 200 ppm Over - 500 ppm
Alarm Types	Gas alarm: 2 step alarm, STEL, TWA, Over alarm Trouble alarm: sensor connection, low battery, circuit error Calibration range over alarm
Alarm Indication	Gas alarm: flashing light, intermittent buzzer and pulsing vibration Trouble alarm: flashing light, intermittent buzzer and trouble type displayed
Sampling Method	Diffusion
Response Time	T90 in 20 seconds	T90 in 30 seconds	T90 in 30 seconds
Accuracy	+/- 0.5%	+/- 1.5 ppm (up to 30 ppm)	+/- 5 ppm (up to 150 ppm)
Power Source	One coin type lithium battery (CR 2450)
Continuous Operation	Approximately 3,000 hours with no alarms or backlighting (about 1 year of normal use)
Safety Rating	CSA classified, “C/US”, as intrinsically safe. Class I, Division 1, Groups A, B, C and D. Class I, Zone 0, Group IIC. Temperature code T4.
Display Method	Digital LCD with auto back light
Dimensions & Weight	2.5"(w) x 1.7"(h) x 0.9"(d) / 63.5 mm(w) x 43 mm(h) x 23 mm(d) 2 ounces / 60 grams
Operating Temp & Humidity	-20 ~ 40°C, below 85% RH (non-condensing)
Dimensions & Weight	71.(w) x 84(h) x 29.5(d) mm, 135 g 2.81”(w) x 3.31”(h) x 1.16”(d), 4.76 oz
Features	LCD manual back light (automatic lighting during alarm) STEL, TWA function Peak hold Time indication
Attachment Choice	Watchband, alligator clip, belt clip, and hard hat clip
Warranty	2 years material & workmanship

Specifications subject to change without notice.