1. design of the temperature sensor
The design of the sensor depends on the type of measurement and the area of application:
- Insertion sensorFor core temperature measurements in liquids or solids.
- Screw-in probeFor measuring in liquid or gaseous media, e.g. in heating technology.
- Cable sensor: Flexible use for a wide range of applications.
- Surface sensorFor measuring the temperature of surfaces.
- Pipe contact sensorFor indirect measurement of the temperature of pipes.
S+S Regeltechnik offers you 4 of 5 of these types of sensors: Screw-in sensors, cable sensors, surface sensors and pipe contact sensors.
2. sensor type
Different sensor types can be used depending on the requirements:
- Pt100/Pt1000Precise measurement, ideal for industrial applications.
- NTC: Cost-effective and fast response, suitable for household appliances, among others.
- Thermocouples: For high temperatures and fast response times.
The figure shows characteristic curves of several sensors for illustration purposes. In this case, the left graph shows the characteristic curve of a PT100 and PT1000 sensor. The graph on the right shows the NI1000 and NI1000 TK5000 sensors.
3. sensor cable (cable temperature sensor)
Here too, there are different cable types that are used depending on the requirements. These differ mainly in the cable material and the corresponding minimum/maximum temperature:
- PVCLiYY 2x0.25mm²: -35...+105°C/ -31...+221°F
- Silicone, SiHF 2x0.25mm²: -50...+180°C/ -58...+356°F
- PTFE2x1.0mm²: -50...+250°C/ -58...+482°F
- Glass silk, 2x0.25mm²: -50...+350°C/ -58...+662°F
4. measuring medium and temperature range
Take into account the medium in which the measurement is to take place (air, liquid, gas) and the required temperature range:
- Air: Room and outdoor temperature sensor.
- Liquid: screw-in and immersion sensors.
- High temperatures: thermocouples.
5. mechanical connection
Make sure that the sensor can be mechanically integrated correctly into the process. Select the appropriate thread size, sleeve length and sleeve diameter.
6. environmental conditions (IP protection class)
Consider the environmental conditions such as Pressure, Humidity, dust and chemical influences. Select suitable materials and protection classes (e.g. IP protection classes).