The California Analytical Model 100 CO analyzer uses a non-dispersive infrared detector coupled
with interferant gas filters. These filters reduce the effects of other gases that absorb infrared
light at the same wavelength as the gas in question. Calibration values are adjusted via the zero
and span pot knobs. The Model 100 offers two selectable ranges.

Manufacturer California Analytical Instruments Analysis Method (NDIR) Nondispersive infrared Range 0-500/ 2,500 ppm Response Time 90 % of full scale in < 5 secs. Sample Flow Rate 0.5 to 2 litres/min. Noise < 1 % of full scale Zero & Span Drift <1 % of full scale per 24 hours Analog Output 0 to 10 VDC and 4 to 20 mA Power 115 VAC Dimensions 5 1/4 " H, 19 " W, 8 " D Weight 24 lbs.

The California Analytical Model 3300A CO analyzer uses a non-dispersive infrared detector coupled with interferant gas filters. These filters reduce the effects of other gases that absorb infrared light at the same wavelength as the gas in question. Calibration values are adjusted via the zero and span pot knobs. The Model 3300A offers three selectable ranges.

Manufacturer California Analytical Instruments Analysis Method (NDIR) Non-dispersive infrared Range 0-1, 2.5, 5 % Response Time 90 % of full scale in < 1 seconds Sample Flow Rate 0.5 to 2 litres /minute Noise < 0.5 % of full scale Zero & Span Drift <1 % of full scale per 24 hours Analog Output Simultaneous 0.1, 1.0, 5.0, 10.0 VDC, 4 -20 mA DC Power 115 VAC Dimensions 5 1/4 " H, 19 " W, 16 " D Weight 30 lbs.

The Thermo Model 48 CO analyzer uses a gas filter correlation / non-dispersive infrared detector.
The gas filter technique reduces instrument cross sensitivity to similar gases. Calibration values
are adjusted via the zero and span thumb wheels or microprocessor (depending on the model).
The model 48C offers ranging up to 30,000 ppm and the 48H offers ranging up to 50,000 ppm.

Manufacturer Thermo Environmental Instruments Analysis Method Gas filter correlation Range 0- 30,000 ppm and 0- 50,000 ppm Precision 1 % of reading or 0.05 ppm Zero Drift < 0.1 ppm in 24 hrs.. Span Drift +/- 1 % full scale in 24 hrs.. Sample Flow Rate 1 litre/minute Analog Output Selectable voltage and RS-232 Power 115 VAC Dimensions 16.75" by 8.62" by 23" Weight 45 lbs.

The API Model 300 CO analyzer uses a gas filter correlation / non-dispersive infrared detector.
The gas filter technique reduces instrument cross sensitivity to similar gases. Calibration values
are adjusted via the microprocessor controls. The Model 300 offers excellent sensitivity and has
user defined ranging of up to 1,000 ppm.

Manufacturer Advanced Pollution Instrumentation (API) Analysis Method Gas filter correlation / NDIR Range 0 - 1,000 ppm Zero Noise 0.025 Zero Drift < 0.1 ppm in 24 hrs.. Span Drift < 1 % full scale in 24 hrs.. Response Time < 60 secs.. Sample Flow Rate 1 litre/minute Analog Output 0 - 1, 5, 10 VDC and 4 to 20 mA Power 115 VAC Dimensions 17" by 7" by 25" Weight 50 lbs.