NYAD SERIES 400
CARBON DIOXIDE ANALYZER
FEATURES
- Microprocessor based controller
- Auto calibration
- Adjustable alarm contacts
- Audible alarm
- Operating range: (0 to 2,000 ppm)
- Large 4 digit LCD display
- Analog output (Voltage or Current)
- O.E.M. packaging
CO2
Sensor technology
Many
gases, including CO2, absorb energy in the infrared band. This
absorption is selective and occurs at specific frequencies
corresponding to the resonant frequencies of bond vibrations within the
molecule. Measuring a characteristic absorption enables the gas
to be detected and the strength of the absorption gives a measure of
the gas concentration.
TheCO sensor optics consists of an infrared
source, a sampling cell, an infrared filter, and a detector. In
addition, the sensor includes electronics to drive the source and to
process the signals from the detector.
The infrared source
is the hot filament of a tungsten lamp emitting a broad band of
radiation, which then passes through the gas in the sample cell then
through a filter before reaching the detector. The filter selects
out a very narrow bank of frequencies corresponding to a characteristic
absorption band for CO2. The level of energy reaching the detector
falls as the concentration of CO2 increases.
SPECIFICATIONS
Sensor
Range: 0-2,000 PPM
Accuracy:
At +25 °C (+77°F)
Operating Temperature: -5 to +45°C
Power
Consumption: Less than 3 watts
Non-linearity: <1% FS
Response
Time: 63% in 1 min.
Enclosure
NEMA-4: 9.5"W x 6.25"H x
3.5" D
Panel: 10"W x 5.25"H x 6"D
Rack: 19"W x 5.25"H x 6"D
Electronics
Display: 4 Digit LCD,
0.5" High
Alarm: SPDT, 1A @ 120 VAC
Output: 0 to 10 VDC, or
4-20 mA
Sample Flow: 100 to 250 cc/min
Power: 120 VAC 50/60
Hz.,1W 
200 Mason Circle, Suite A, Concord, CA 94520
Ph: (925) 270-3971, Fax: (925) 270-3973 www.nyad.com
