Category: Temperature Sensors

Do you really need to measure temperature – or do you simply need to know when it is time to take action?

In many overtemperature protection applications, a Temperature Switch can provide a simpler and more direct solution than a complete temperature measurement system. This article explains the difference between Temperature Sensors and Temperature Switches, how bimetal thermal switches work, when to choose NC or NO, and why installation location, switching temperature, and thermal response are critical to effective protection.

Temperature monitoring in Battery Packs is not limited to electric vehicles. An NTC sensor mounted directly on a battery cell can help the BMS detect Hot Spots, monitor temperature differences and support effective thermal management. This article examines the Variohm Eurosensor ETP-ST-21-35-B57861S0103A039, an NTC 10K Sleeve Temperature Sensor designed for cylindrical cells, and explores its relevance to UAVs, robotics, defense systems, ESS and industrial applications.

Think your PT100 sensor has failed because your PLC is displaying the wrong temperature? The problem may not be the sensor at all. This article explains the differences between RTD, PT100, PT1000, thermocouples, and thermistors, compares 2-wire, 3-wire, and 4-wire RTD connections, and demonstrates how cable resistance alone can introduce temperature errors of several degrees. Learn how to select the right RTD sensor, probe construction, and wiring method for accurate and reliable temperature measurement.

Most thermal protectors disconnect a circuit when it overheats – but what happens when the system cools down? In many applications, the automatic restart itself can become the biggest risk. Learn why overheating is often just a symptom, when auto-reset protection isn’t enough, and how latching protection can prevent repeated failure cycles, equipment damage, and safety hazards.

The temperature sensor showed 80°C. The reading was completely accurate. The motor still burned out. Why? Because in thermal protection, the most important question is not how hot it is—but where you are measuring. Discover how VARIOHM temperature sensors and LIMITOR thermal protection devices help engineers improve reliability, prevent overheating, and protect critical systems.

Temperature measurement is no longer only about selecting RTD, Thermistor or Thermocouple technology.
In many industrial, medical, defense and Semiconductor applications, the probe mounting configuration itself directly affects response time, thermal stability, accuracy and long-term reliability.

This article explores the engineering differences between Ring Terminal, Screw-In, Surface and Tubular Temperature Probes, common installation mistakes that create thermal lag and instability, and how Variohm and Limitor temperature probe solutions help optimize real-world thermal measurement performance.

Industrial temperature sensors play a critical role in monitoring and protecting industrial systems. This article explains the engineering challenges behind accurate temperature measurement, common mistakes in sensor selection, and how VARIOHM temperature sensing solutions provide reliable measurement as part of a complete system architecture.