Temperature switches
Temperature switches for temperature monitoring
About temperature switches
Cost efficiency, optimal use of space, reliable operation and easy commissioning indicate modern process measuring technology. The temperature switches completely fulfills these requirements in all industries. Designed for safe monitoring of process temperatures it can be selected between one or two switch outputs as well as one switch output and one standardized analog output. A variety of process connections leads to a flexible use.
Portfolio description
Our portfolio of modular temperature switches provides:
- Temperature switches with transmitter and display
- Wide range of process connections (clamp, metallic sealing systems, weld-in adapter, APV-inline, Varivent, Ingold, compression fittings, ...)
- Sensors with fastest response times (t90s: 2 s) for optimum process control
©Endress+Hauser
In the process automation two measurement principles for temperature have asserted themselves as a standard:
RTD - Resistance temperature detectors: Measuring principle
The RTD sensor changes the electrical resistance with a change in temperature. They are suitable for the measurement of temperatures between -200 °C and approx. 600 °C and stand out due to high measurement accuracy and long-term stability. The sensor element most frequently used is a Pt100. As a standard, Endress+Hauser RTD sensors fulfill the IEC 60751 accuracy class A.
TC - Thermocouples: Measuring principle
A thermocouple is a component made of two different metals connected with each other at one end. An electrical potential (thermoelectric force) is caused due to the Seebeck effect at the open end if the connection and the free ends are exposed to different temperatures. With the help of the so-called thermocouples reference tables (see IEC 60584) the temperature at the connection (measuring junction) can be concluded.
Thermocouples are suitable for temperature measurement in the range of 0 °C to +1800 °C. They stand out due to the fast response time and high vibration resistance.
Benefits
- Integrated switching electronics for decentral and economic process monitoring and control
- Long-term stable temperature sensors
- High accuracy across the entire ambient temperature range and short response time
- PC programmable