GasWatch 2 Single Gas Monitor

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Discontinued (Limited Stock May Be Available)

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GasWatch 2 Single Gas Monitor

The GasWatch 2 is the first single-gas monitor that can be comfortably worn on the wrist like a watch. The GasWatch 2 is a convenient, inexpensive, hands-free method of gas monitoring for personal protection of oxygen deficiency, carbon monoxide or hydrogen sulfide. The built in vibrator, audible, and visual alarms immediately alert the user of a dangerous gas condition.

The GasWatch 2 is controlled by a microprocessor for reliability and advanced capabilities. Some of these advanced capabilities include distinctive audible and visual alarms for dangerous gas conditions and malfunctions, a large digital readout with a manual backlight that also automatically lights in an alarm condition, as well as the display of PEAK, TWA, and STEL readings. The replacement sensors are inexpensive, easily field replaceable and have a life expectancy of about 2 years. Equipped with a watch band, optional belt clip or hard hat clip, the GasWatch 2 can be worn either on the wrist, belt, or hard hat.

The GasWatch 2 will operate for over 3000 hours on one battery (about 1 year normal use). And yes, the GasWatch 2 even tells the time!

GasWatch 2 Single Gas Monitor

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)
Accuracy Statement± 0.5% of O2± 5% of reading or 
± 2 ppm H2S
(whichever is greater)
± 5% of reading or 
± 5 ppm CO
(whichever is greater)




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 secondsT90 in 30 secondsT90 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

GasWatch 2 Single Gas Monitor

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