Environmental Monitoring
Common pollutants in air are oxides of nitrogen emitted by car exhausts, which are toxic and can cause acid rain and other damage to the environment, as well as risks to health.
In a NOx analyser, a sample of exhaust gas is mixed with ozone, producing a chemiluminescent reaction.
The light emitted is measured by a photomultiplier and the concentration of the NOx gases is determined. This application requires a red-sensitive photomultiplier.
SOx gases can also be detected with this technique. Very low concentrations can be detected, down to the ppb level. The most sensitive systems require the use of cooled photomultiplier detectors which can be supplied to special order.
The presence of harmful bacteria in water can be detected with rapid microbiology techniques, using luminometers.
Photon Counting Modules
Type
Effective cathode dia. mm
Cathode type
Spectral response range nm
Typical dark counts@ 20°C
Max count rate MHz
Output signal
Outline drawing
Data Sheet
Examples of Analogue Modules
Type
Effective cathode dia. mm
Cathode type
Spectral response range nm
Amplifier bandwidth MHz
Outline drawing
Data Sheet
