GasWatch 2 Model
72-0007RK ...........................................GW-2X with watch band
73-0040RK...........................................GW-2C with watch band
73-0041RK...........................................GW-2H with watch band
72-0007RK-01 .....................................GW-2X with alligator clip
73-0040RK-01 .....................................GW-2C with alligator clip
73-0041RK-01 .....................................GW-2H with alligator clip
72-0007RK-02......................................GW-2X with hardhat clip
73-0040RK-02 .....................................GW-2C with hardhat clip
73-0041RK-02 .....................................GW-2H with hardhat clip
Ordering Information
72-0007RK-03 ............................................GW-2X with belt clip
73-0040RK-03............................................GW-2C with belt clip
73-0041RK-03............................................GW-2H with belt clip
Authorized Distributor:
Toll Free: (800) 754-5165 • Phone: (510) 441-5656
Fax: (510) 441-5650
•
www.rkiinstruments.com
A9812
ISO 9001:2000
Specifications subject to change without notice.
Model Name GW – 2X GW – 2H GW – 2C
Gas Detected
Oxygen (O2) Hydrogen Sulfide (H2S) Carbon Monoxide (CO)
Detection Principle
Galvanic cell Electrochemical cell Electrochemical cell
Detection Range
(Increments)
0 – 40%vol.
(0.1% vol.)
0 – 100 ppm
(0.5 ppm)
0 – 500 ppm
(1 ppm)
Alarm Set Points
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 alarms: 2 level alarm (user adjustable), STEL, TWA, and over alarm
Trouble alarms: sensor connection, low battery, circuit error, and calibration range error
Alarm Methods
Gas alarms: flashing light, intermittent buzzer and pulsing vibration
Trouble alarms: flashing light, intermittent buzzer and trouble type displayed
Gas Sampling
Diffusion
Response Time
T90 in 20 seconds
(Alarms within 5 seconds
when exposed to 12% O2)
T90 in 30 seconds
Accuracy
+/- 0.5% vol.
+/- 1.5 ppm
(up to 30 ppm)
+/- 5 ppm
(up to 150 ppm)
Power
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
Dimension 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
Case
High-impact plastic, dust and weather proof
Attachment Choices
Watchband, alligator clip, belt clip, and hard hat clip
Operating Temperature and
Humidity
-10 ~ 40°C, (14 ~ 104° F) below 85% RH (non condensing)
Special Functions
• LCD manual backlight (automatic lighting during alarm)
• STEL, TWA function
• Peak hold
• Time indication
Warranty
Two years material & workmanship
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