| Testo Carbon Dioxide Meter 0560.5350
Carbon Dioxide concentration is used as an indicator when assessing indoor air quality. If the carbon dioxide concentration in indoor air is too high, the air feels "stuffy and stale". Bad air quality can lead to fatigue, lack of concentration and illness (Sick Building Syndrome) and is caused in many cases, by insufficient ventilation. The carbondioxide concentration in demand controlled ventilating (DCV) systems is used to regulate the supply of fresh air. Stationary carbon dioxide transducers are used and should be checked on a regular basis.
The indoor air to be measured diffuses through the particle filter in the measuring cell. At a certain wavelength the radiation from the radiation source is absorbed by the carbon dioxide, in the measuring cell. The higher the carbon dioxide concentration in the measuring cell, the lower the radiation intensity detected. The detector then converts the incoming radiation to an electrical signal. Only the radiation wavelength needed for the measurement is allowed by the optical filter to pass through in the direction of the detector.
The new carbon dioxide sensor is based on the dual beam infrared absorption principle. This carbon dioxide sensor has many advantages; long-term stability, high accuracy and efficiency, as well as sensor calibration is not required. When compared to electro chemical measuring cells, the carbon dioxide sensor does not show any cross sensitivity to other gases. Additionally the sensors are not poisoned if the concentration of carbon dioxide is too high. This new sensor has a measured value detector and reference detector so that environmental and disturbing influences such as aging of radiation source, are compensated by the reference beam.
Specifications:
Sensor: 2 channel infrared absorption principle
Range: 0 to 9,999 ppm or 0 to 1 vol %
Resolution: 1 ppm or 0.001 vol %
Accuracy: 0-5000 ppm: +/- (50 ppm + 2% m.v.)
5000 - 9999 ppm: +/- (100 ppm + 3% m.v.)
Display: LCD, 0.5 " high digits w/ ppm/ vol. % switch
Ambient Temp: 32 to 122 degrees F
Power Supply: One 9v alkaline battery
Battery Life: More than 8 hours
Dimensions: 7.5 x 2.25 x 2 inches
Weight: 11 oz
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All prices are in Canadian Currency