PTC sensors are thermistors with a positive temperature coefficient of resistance (TCR) ( Positive Temperature Coefficientis the positive temperature coefficient). Thermistors or thermistors are semiconductor resistors whose resistance varies non-linearly with temperature. The temperature dependence of the resistance of a PTC thermistor is characterized by a significant increase in resistance when a certain temperature is reached. NTC thermistors have an exponential temperature dependence of resistance, i.e. resistance increases as temperature decreases and decreases as temperature increases. Thermistors are available in the form of rods, tubes, disks, washers, beads. Thermistors are widely used in all areas of automation where it is required to measure, maintain and regulate temperature.
PTC type thermistors can be divided into two main categories: silistors and “protection thermistors”. Silistors are heat-sensitive silicone resistors, characterized by the fact that they have a positive, in the temperature range up to 150 ° C, and a negative, in the temperature range above 150 ° C, TKS. Silistors have the most stable TCR (about 0.77%/°C) in the range from -60 to +150°C, where they are most often used for temperature control. “Protective thermistors” are not used for temperature measurement, but serve as built-in thermal protection elements or as fuses in overcurrent and overvoltage protection circuits.
OWEN produces the following models of DRTS sensors:
|DRTS014-1000 OM.50/2||L=50mm, l=2m, D=5mm|
|DRTS094-1000 OM. 500/1||L=500mm, l=1m, D=6mm|
|DRTS174-1000 OM. 120/6||L=120mm, l=6m, D=5mm|