Extech CO250 Portable Indoor Air Quality CO2 Meter

Item #:

EXT-CO250

Brand:

Extech

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CO250 Portable Indoor Air Quality CO₂ Meter by Extech

Checks for Carbon Dioxide (CO₂) concentrations
Calculates statistical weighted averages of TWA (8 hour time weighted average) and STEL (15 minute short term exposure limit)
Maintenance free NDIR (non-dispersive infrared) CO₂ sensor
Measurement ranges: CO₂: 0 to 5,000ppm; Temperature: 14 to 140°F (-10 to 60°C); Humidity: 0.0 to 99.9%
User programmable audible alarm
Backlit triple LCD display
Built-in RS-232 interface for capturing readings on PC
Data acquisition software and cable included to record and document CO₂, Humidity and Temperature data
Optional 33% and 75% RH calibration bottles (RH300-CAL)
Complete with software and cable, 4 AA batteries, and carrying case

Check air quality in schools, office buildings, greenhouses, hospitals and anywhere that high levels of carbon dioxide are generated

General Specifications

Display	Triple LCD with backlight
Sensor Type	CO₂: NDIR (non-dispersive infrared) technology Humidity: Capacitance sensor; Temperature (air): Thermistor
Operating Conditions	0 to 50°C (32 to 122°F); < 95% RH non-condensing
Storage Conditions	-20 to 60°C ( -4 to 140°F); <99% RH non-condensing
Power Supply	4 x 1.5V 'AA' batteries or AC adaptor (9V/1A)
Battery Life	approx. 24 hours (alkaline batteries)
Dimensions / Weight	200x70x57mm (7.9x2.7x2.3")/190g (6.7 oz.)

Range Specifications

Function	Range	Resolution	Accuracy
CO2	0 to 5000ppm	1ppm	±(%5rdg + 50ppm)
	5000 to 9999ppm	1ppm	Not specified
	Pressure dependence: +1.6% reading per kPa deviation from normal pressure, 100kPa
Temperature	-10 to 60°C 14 to 140°F	0.1°	±0.6°C/0.9°F
Humidity	0.0 to 99.9%	0.1%	±3%(10 to 90%) ±5%(< or > 10 to 90%)
Wet Bulb	-5 to 60°C 23 to 140°F	0.1°	Calculated from RH and Temperature
Dew Point	-20 to 60°C -4 to 140°F	0.1°	Calculated from RH and Temperature