The 5 different GasWatch 3 models can protect you from oxygen deficiency [GW-3(O2)], exposure to carbon monoxide [GW-3(CO)] or exposure to hydrogen sulfide [GW-3(H2S)]. A hydrogen compensated model [GW-3(C-)] can protect those who work in steel mills, refineries or other environments where hydrogen is present from carbon monoxide exposure. The dual sensor model [GW-3(CX)] can simultaneously protect you from oxygen deficiency and carbon monoxide exposure.
A small, field-replaceable, coin-type lithium-ion battery gives the GasWatch 3 over 4,000 hours of continuous operation. The hydrogen compensated CO can operate up to 2,500 hours, and the dual sensor CO/O2 model will get up to 2,000 hours of continuous operation.
Application
- Refineries
- Petrochemical facilities
- Sewage treatment plants
- Fire departments
- Chemical plants
- Tunnels
- Mines
- Hazardous waste sites
Specifications
| Model | GW-3 (HS) Hydrogen Sulfide |
GW-3 (CO) Carbon Monoxide |
GW-3 (C-) H2 Compensated CO |
GW-3 (CX) (Dual Sensor) | GX-3 (O2) Oxygen |
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| Carbon Monoxide | Oxygen | |||||
| Detection Principle |
EC | Dual EC | Galvanic Cell | |||
| Detection Range (Increments) |
0 ~ 30 ppm (0.1) 30 ~ 100 ppm (1) |
0 ~ 300 ppm (1) | 0 ~ 25.0% Vol. (0.1) | |||
| Service Range | 100 ~ 200 ppm (1) | 310 ~ 2,000 ppm (10) | 25 ~ 40.0% Vol. (0.1) | |||
| Alarm Setpoints | 1st: 5.0 ppm 2nd: 30.0 ppm 3rd: 100.0 ppm TWA: 1.0 ppm STEL: 5.0 ppm OVER: 200.0 ppm |
1st: 25 ppm 2nd: 50 ppm 3rd: 1200 ppm TWA: 25 ppm STEL: 200 ppm OVER: 2,000 ppm |
L: 19.5% Vol. LL: 18.0% Vol. H: 23.5% Vol. OVER: 40.0% Vol. |
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| Operating Temperature | -20 °C to +50 °C (no sudden changes) (Approx. 15-minute temporary use environment: -20 °C to +60 °C) [no sudden changes] |
-20 °C to +50 °C (no sudden changes) |
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| Humidity Range | 10 to 90 %RH (no condensation) (Approx. 15-minute temporary use environment: 0 to 95 %RH) [no condensation] |
10 to 90 %RH (no condensation) |
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| Continuous Operating Time |
Approx. 4,000 hours | Approx. 2,500 hours | Approx. 2,000 hours | Approx. 4,000 hours | ||
| Sampling Method | Diffusion Type | |||||
| Types of Alarm | Gas alarms: Three-step alarms, STEL alarm, TWA alarm, OVER alarm
Fault alarms: Sensor connection / disconnection, low battery level, calibration failure, clock abnormality, system abnormality |
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| Alarm Indications | Auto-reset or self latching
Lamp flashing, intermittent buzzer sounding, gas concentration readout blinking, vibration |
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| Power Source | CR2450 coin-type lithium ion battery | |||||
| Case Material | Intrisically safe explosion-proof construction (Ex ia IIC T4 Ga) , IP 66/68 (6.6ft, 1h) (2m, 1h) | |||||
| Approvals | ATEX, IECEx, CSA | |||||
| Dimension & Weight | 2.5″ W x 1.6″ H x .86″ D (Approx 63 mm W x 42mm H x 22mm D) , 1.6 ounces (approx. 45g) | |||||
| Functions | Data logger, vibration, STEL alarm, TWA alarm, quick calibration, peak value display, temperature display | |||||
| Standard Accessories |
CR2450 coin-type lithium-ion battery, Spring pins (used to mount accessories on to the rear face), Watch band, Alligator clip |
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| Optional Accessories |
Heat-resistant case, Dust filter, CF-1821 filter (for CO sensor), CF-A13i-1 humidity control filter (for H2S sensor), Calibration adapter | |||||
