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CO-GUARD is a compact, easy to install and operate compressed airline carbon monoxide monitor that meets OSHA monitoring requirements for Grade D breathing air. The instrument is specifically designed for trouble-free operation, utilizing an electrochemical carbon monoxide (CO) sensor with a life expectancy of up to three years. The CO-GUARD is supplied with a regulator assembly and five foot sample hose, and is factory pre-calibrated.Product Highlights
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Display: High-contrast, backlit
Resolution: 1 ppm
Alarms: Visual Gas Alarm: 3 red LEDs, Visual Power Fault: Green/Red LEDs, Audible Alarm: 105 dB at 30 cm (12 inches)
Operating Power: 110 VAC, 220 VAC and/or 24 VDC, 15W
Power Connection: Supplied with strain relief for 0.20 to 0.35 inch diameter cable
Outputs: Relays: 4 Form C, 10A SPDT contacts, 3 gas alarms and 1 fault, Analog: 4-20mA, Digital: RS-485 COM port interface using Modbus RTU
Sensor: Electrochemical
Response Time: t90 = 30 sec
Accuracy: +/- 10% of reading
Temperature Range: 32° to 104° F (0° to +40° C)
Inlet Air Line Connection: 1/4 inch NPT female
Air Line Sample Hose to Monitor: 5 foot length
Inlet Pressure: 60 to 150 psi, air supply lines, 55 psi regulated to monitor
Enclosure: Polycarbonate
Dimensions: 7.1 W x 6.1 H x 3.5 D inches (18.2 W x 15.5 H x 8.9 D cm)
Weight: 2 lbs (0.9 kg)
STANDARD CALIBRATIONS
Range: 0-50 ppm CO
Alarm Levels: Alarm 1: 5 ppm CO, user adjustable, Alarm 2: 10 ppm CO, user adjustable, Alarm 3: 20 ppm CO, user adjustable
Alarm Adjustment: All three alarms are user adjustable between 1 to 50 ppm
