Structure-Borne Sound Sensor BS20
3 Sensor operation
II - II - 15
Revision: 1.0; Date: 2017-11-06
3.5 Temperature measurements
Note!
For correct temperature measurements, make sure that the surface of the
temperature sensor is free from contamination.
The infrared temperature sensor is calibrated on a black emitter that emits the maximum
possible temperature (100 % emission
→ emissivity value ε = 1). As the emission
characteristics of the surfaces of measurement objects will deviate from this value, this will need
to be taken into account for the contactless temperature measurement.
Painted or oxidized surfaces usually have an emissivity value of 0.9. This setting is suitable for
many measurement tasks. Additional values for frequently used materials can be found in
emissivity value tables.
The emissivity value can be set at the SONAPHONE as follows:
In the LevelMeter app, under the
Settings
Temperature measurement
menu item, a material with a stored emissivity value can be selected, or an emissivity value
specified manually.
3.6 Cleaning and maintenance
The sensor is maintenance-free. It can be cleaned externally using a damp cloth and a mild,
non-abrasive cleaning agent.
D = 38 mm
D = 11 mm
