Air Systems CO-91IS Intrinsically Safe Co Monitor-9V Only Replacement 

This CO monitor may be wall-mounted & has LCD triple-digit display. It will operate at a 4 - 113 degree F temperature range and uses a 3 electrode electrochemical with a bias voltage sensor.  

Features 

• Calibration in under 2 minutes
• 3 digit LCD monitor display
• Temperature range 4 - 113 deg. F (-20 - 45 deg. C)
• Accuracy +/- 1 percent of the full scale
• Monitor range: 0 - 200 ppm CO (15 - 23 percent for optional O2)
• Pressure range: 1 - 3 psi, flow 50 - 100 cc
• Response 90 percent full scale in 10 sec.
• 3 electrode electrochemical sensor with bias voltage
• Humidity range: 5 to 95 percent relative humidity
• Warranty - 2 years unit & CO sensor (1 yr for oxygen sensor)
• Alarm set point - 10 ppm CO (5 ppm Canada)
• 115 Volts AC, dual 9 Volt battery or 8 - 16 Volts DC
• Test circuitry is a manual push to test sensor operation & alarms
• Shielding - internal RFI / EMI circuitry
• Warning indicators - amber for low battery, green for normal operation, red for high CO level
• Size - 2 3/4 X 7 X 5.1 inches