RKI Instruments GasWatch 2 Manual - Manual (Page 7)

GasWatch 2 Operator’s Manual Specifications • 2
Specifications
Table 1: GasWatch 2 Specifications
GW-2C GW-2H GW-2X
Target Gas Carbon Monoxide
(CO)
Hydrogen Sulfide
(H
2
S)
Oxygen
(O
2
)
Detection Range 0 to 500 ppm 0 to 100.0 ppm 0 to 40.0% vol.
Display Increment 1 ppm 0.5 ppm 0.1% vol.
Detection
Principle
Electro Chemical Electro Chemical Galvanic Cell
Alarm Points Low 25 ppm
High 50 ppm
TWA 25 ppm
STEL 200 ppm
Low 10.0 ppm
High 30.0 ppm
TWA 10.0 ppm
STEL 15.0 ppm
Low 19.5% vol.
(decreasing)
High 23.5% vol.
(increasing)
Sampling Method Diffusion Diffusion Diffusion
Response Time T90 in 30 seconds T90 in 30 seconds T90 in 20 seconds
Accuracy ± 5% of reading or
± 5 ppm CO
(whichever is
greater)
± 5% of reading or
± 2 ppm H
2
S
(whichever is
greater)
± 0.5% O
2
Safety/Regulatory
C US
186718
CSA classified, “C/US”, as Intrinsically Safe. Exia. Class I,
Groups A, B, C, & D. Class I, Zone 0, Group IIC.
Temperature Code T4.
Power Two AAA size Alkaline Batteries Standard, Duracell MN2400
or PC2400, Eveready Energizer E92 or EN92
Continuous
Operating Hours
Approximately 3,000 Hours With No alarms or Backlighing
Case High-impact Plastic, Dust Proof and Weather Resistant
Standard
Accessory
Wristband