Digital Thermocouple with transmitter, K type

K type thermocouple built-in transmitter can directly provide accurate input signal of temperature changes for display instruments, recording instruments, signal conditioners, scanister and computer.

Specification

1. Thermocouple temperature range chart

2. Transmitter parameter chart

3. Meter and protection head type (unit: mm)

4. Selection chart

Note: The sensing element is sheath thermocouple, thermowell material is stainless steel, and circuit adopts non-isolated type. When ordering products, write the thermowell insertion depth l and the corresponding temperature range for output 4~20mA signal you need.

Application

Tips: Differences between RTD sensor and thermocouple

1. The nature of signal. RTD sensor itself has resistance. The change of temperature makes the resistance produce positive or negative resistance changes, and output resistance signal. The thermocouple generates induced voltage that changes with the temperature changes.
2. The temperature range detected by these two kinds of sensors is different. RTD sensor is used to low temperature detection while thermocouple is used to high temperature detection.
3. In the aspect of material, the thermistor is a single metal material with temperature sensitive changes character.
4. The thermocouple is thermometal, which is combined with two different metals. Due to the change of temperature, electric potential differences are produced on both ends of two different metal wire.The thermocouple has positive and negative poles and so does the extension wire. RTD sensor doesn't need extension wire, and it is cheaper than thermocouple. But RTD sensor requires power supply excitation, which can't instantaneously measure the change of temperature.