LIMIT | Everything can be measured 1
ABOUT TEMPERATURE SENSORS How to find the right s
ensor for your temperature gauge: AIR SENSORS, IMMERSION SENSORS AND INSERTION SENSORS Three-phase at primary level, all conductors for outdoor use Immersion sensors (Type K, Pt100, NTC) for measurements in fluid, but also for measurements in gas and air. TYPE K SENSOR DESIGN We recommend the patented measuring probe with springloaded thermocouple bands for fast measurement, even on uneven surfaces. The thermocouple bands measure the actual temperature of the object being measured within a few seconds: Easy to use (without silicone- based thermal conduction paste). Fast measuring results. Further information • The specified response time t99 is measured in fluid in motion (water) at 60 °C. • In general, the thinner the sensor, the faster the response, which means less time in the object being measured. • The sensor has to be inserted in the object being measured to an extent at least 10 times the diameter of the sensor (15 x the diameter is better) in order to measure the actual temperature. • However, the thinner a sensor is, the more careful you have to be with it. SURFACE TEMPERATURE SENSORSDESIGN Sensor designs: Type K, CuCuNi, Pt100, NTC. With measuring tips for measurements on flat surfaces. We recommend a silicone-based thermal conduction paste (Tmax 260 °C) for optimum function. Advantages of NTC: • Robust design. • Higher sensor accuracy. Disadvantages of NTC: • Long response time. • Careful handling is required. • Only suitable for smooth surfaces with high thermal capacity, e.g. large metal objects. RULE OF THUMB: Sensors with thermo couples are fast and have a broad measuring range. Resistance sensors and NTC sensors are slower but more accurate. The broader the measuring range, the more general applications are available. 128 |