The presence of liquid water and/or temperature fluctuations will add to the measurement inaccuracy. The use of a small heating element will
- Ensure temperature stability after “warm-up”
- Prevent condensation inside the sensor
Product features:
- Easy to mount on the sensor
- No controller required
- Self-stabilizing temperature ~43°C ±2°K (requires appropriate thermal insulation according to the ambient temperature)
- 3W and 6W version and 12VDC 3/6W power required
Compensating for ambient temperature fluctuations
Ambient temperature fluctuations have a large impact on the output from an NDIR sensor, the same concentration of gas will generate different readings in winter compared to summer and even during a 24-hour period, overnight, also portable devices will read differently when cold so require warming up prior to use. To ensure that ambient changes don’t influence measurement values it is important to maintain the sensor at a stable temperature.
Risk of condensation inside the sensor
To prevent condensation from occurring in the sample cell the temperature of the gas path and sensor needs to be higher than the temperature of the gas flow itself. If the sensor is used in an emission control system for a combustion process, moisture(condensation) not only affects the measurement accuracy but can also damage the sensor.
Increase sensor accuracy
Even though NDIR sensors are temperature compensated the result isn’t perfect, the measurement remains temperature dependent. To achieve the highest accuracy it’s recommended to keep the temperature of the sensor stable.
Auxiliary Modules
Accessories
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