ABB
AO2000 Series - Caldos25
AO2000 Series - Caldos27

AO2000 SERIES - CALDOS25 (replaces CALDOS15)

The Caldos25 is designed for highly corrosive applications. The measuring cell with its glass-coated resistor is especially resistant to corrosive gases. With the Caldos25, pressure correction is not required since the measurement signal is completely independent of the sample gas pressure - whether negative or positive.

Typical Applications

- Chlorine production
- Analysis of SO₂ in metal roasting plant off-gas
- Ammonia dissociation

Sample Components - Smallest Measuring Ranges (examples)

- H2 in N2 or Air	0 - 0.5 Vol.%
- SO2 in N2 or Air	0 - 1.5 Vol.%
- H2 in Cl2	0 - 0.5 Vol.%

Calibration

- Zero-point calibration with sample component-free process gas or substitute gas
- End-point calibration with process gas having a known sample gas concentration,
  or with substitute gas

Measurement Principle

The analyzer modules' measuring principle is based on the differences in thermal conductivity between gases. Individual gas components are quantitatively analyzed in a binary or quasi-binary mixture based on their thermal conductivity.

Downloads

AO2000 Brochure    
AO2000 Data Sheet    
AO2000 Safety Brochure

 

AO2000 SERIES - CALDOS27 (replaces CALDOS17)

The smallest of measuring ranges and fast measurements are characteristics of the Caldos27 thanks to its silicon sensor.  In addition, the micro-structure of the sensor gives the Caldos27 a particularly short T₉₀ response time.  Measuring ranges can be selected freely.  An exceptionally long-term stability of the end point permits the Caldos27 single-point calibrations with only one gas.

Typical Applications

- Hydrogen purity measurement
- Turbo generator monitoring
- Inert gas monitoring
- LEL monitoring

Sample Components - Smallest Measuring Ranges (examples)

Calibration

- Zero-point calibration with sample component-free process gas or substitute gas
- End-point calibration with process gas having a known sample gas concentration
  or with substitute gas
- Simplified calibration with a standard gas avoids the need for separate zero and
  end-point calibration with test gases
- Automatic calibration by means of internal control

Dynamic Response

- T₉₀ ≤ 2 s