REED R9400 Carbon Monoxide Meter with Temperature, 1000ppm, -4 to 158°F (-20 to 70°C)


This carbon monoxide meter is capable of detecting concentrations up to 1000ppm. The R9400 features a large backlit LCD display with data hold/max functions and user adjustable alarm limit.


  • Backlit LCD displays CO levels from 0 to 1000ppm and ambient temperature
  • User adjustable alarm limit (audible beep frequency increases as CO level rises)
  • Quick response and high accuracy
  • Data hold and max functions
  • Self test sequence on start-up
  • Low battery indicator and auto shut off


Carbon Monoxide
Measuring Range1 to 1000 ppm
Accuracy±5% or ±5 ppm
Resolution1 ppm
Sensor TypeStabilized electrochemical sensor
Measuring Range-4 to 158°F (-20 to 70°C)
Accuracy±1.5°F (0.8°C)
Resolution0.1°F (0.1°C)
Sensor TypeThermistor
General Specifications
Display4-digit, dual LCD
Backlit DisplayYes
F/C SwitchableYes
AlarmAudible (buzzer)
Alarm LimitUser Adjustable
Max HoldYes
Display HoldYes
Warm-up Time60 seconds
Response Time2x per sec.
Auto Shut-offYes (after 30 mins, off)
Power Supply4 AA batteries
Battery LifeApprox. 200 hours
Low Battery IndicatorYes
Product CertificationsCE
Probe Length16" (406mm)
Operating Temperature32 to 122°F (0 to 50°C)
Storage Temperature14 to 140°F (-10 to 60°C)
Operating Humidity Range10-90%
Dimensions7.5 x 2.6 x 1.7" (190 x 65 x 45mm)
Weight8.3 oz (235g)