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Air Checker
CO/Co2 Meter


Best for measuring the indoor CO/CO2 concentration
Air Checker CO/CO2 Meter MB-350, measures and indicates carbon monoxide(CO), carbon dioxide(CO2), temperature, humidity. This instrument helps you to stay conscious of the air around you and maintain a healthy indoor environment. We recommend that this instrument should be used in greenhouses and other plant facilities to monitor the carbon monoxide or the carbon dioxide level.


  • PPM value of CO and that of CO2 appear alternately on the display in 2 seconds.
  • CO measuring range --- 0-250ppm
  • CO2 measuring range --- 0-9,999ppm
  • Alarm function - Alarm beeps over 50ppm CO concentration, and over 2,500ppm CO2 concentration.
  • Electrochemical sensor (CO), High quality NDIR sensor (CO2)

CO concentration and the poisoning symptom

200ppm --- Slight headache within 2-3 hours

400ppm --- Frontal headache in 1-2 hours

800ppm --- Dizziness, nausea, and convulsions within 45 minute; insensible within 2                         hours

1600ppm --- Headache, increased heart rate, dizziness, and nausea within 20 min;                               death in less than 2 hours

3200ppm --- Headache, dizziness and nausea in 5 to 10 minutes. Death within 30                                  minutes.

6400ppm --- Headache and dizziness in 1 to 2 minutes. Convulsions,                                                         respiratory arrest, and death in less than 10-15 minutes.

12800ppm --- Death in less than 3 minutes

This instrument helps you to measure carbon monoxide(CO), carbon dioxide(CO2), temperature, humidity to maintain the healthy indoor environment. Our own developed, NDIR (nondispersive infrared absorption system) sensor is used for CO2 measurement and electrochemical sensor is used for CO measurement.
We support the efficient ventilation and temperature adjustment for the better living environment


CO2 sensor Measuring method: Non-dispersive Infrared(NDIR)
Measurement Accuracy:  ±3% ±30ppm
Alarm: 2,500ppm
Resolution: 1ppm
Range: 0〜9,999ppm (Accuracy guaranteed: 0〜5,000ppm)
Temperature Measurement Range/
Humidity Measurement Range/
CO sensorMeasuring method: Electrochemical sensor (manufactured in Japan)
Measurement Accuracy: 0~100ppm : ±10%F.S. , 101~250ppm : ±15%F.S.
Alarm: 50ppm
Resolution: 1ppm
Range: 0~250ppm
Operating Temperature/Humidity0℃ to 50℃ / 0 to 95% RH (no condensation)
BeepCO = 50ppm, CO2 = 2500ppm
The Co alarm beeps for continuosly and the CO2 alarm beeps for 10 seconds
(1 second on, 1 second off).
(When the alarm beep button is pressed , the beep turns off.when the alar beep button is pressed for more than 3 seconds, the beep fucution stops, please keep pressing the button until ON or OFF shows on the display in order to reboot the beep function)
Dimensions 135 x 90 x 28 mm (W x D x H)
WeightApprox. 200g

Don't hesitate to contact us

Ready for offers and cooperation

Tel: +81-3-6240-1621
Fax: +81-3-6240-1830