RTD temperature sensor can directly provide accurate input signal of temperature changes for display instruments, recording instruments, signal conditioners, scanister and computer.

Specification

1. RTD temperature range and accuracy chart

Note: t is the actual measuring temperature absolute value of the temperature sensing element.
2. Transmitter parameter chart

Feature

• Wide Range of Applications: Digital temperature sensor with transmitter can directly measure the temperature of liquid, steam and gas medium in the range of -200~+420°℃ in various industrial processes, and convert the temperature into a 4-20mA unified output signal proportional to the electrical signal of the thermal resistor. It can be widely used in metallurgy, petroleum, chemical industry, electricity, light industry, textile, food and other fields.
• Anti-interference: The transmitter component of the digital RTD sensor is miniaturized and can be installed in the junction box of the thermal resistor to become an integrated temperature transmitter. As an integrated temperature transmitter, it directly outputs 4~20mA signals in the industrial field, which improves the anti-interference ability of the signal during long-distance transmission.
• Corrosion Resistance: RTD sensor with digital meter has high accuracy, low power consumption, wide operating environment temperature range, and stable and reliable operation. Moreover, due to the use of silicone rubber sealing structure, it is shock-resistant and moisture-resistant, and is suitable for use in harsh field environments.
• Easy to Use: It can directly display the real-time temperature on site with high precision, and directly observe the temperature change of the measured medium. At the same time, it can output a standard 4-20mA current signal to the display instrument in the control room or the DCS system to display the temperature.

Dimension (Unit: mm)

Selection

Note: The sensing element is sheath RTD sensor, 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: Troubleshooting of Pt100 RTD sensor

1. Fault: Instrument shows negative value.
   Possible cause: Wrong connection between display instrument and Pt100 RTD sensor, or short circuit of Pt100 RTD sensor.
   Processing method: Correct the connection, find out short circuit position and strengthen insulation.
2. Fault: Instrument shows that the indicated value of Pt100 RTD sensor is lower than the actual value or the indicating value is unstable.
   Possible cause: There are metal chips, dust, dirt among wiring terminal and Pt100 RTD sensor short circuit.
   Processing method: Remove metal chips, clean dust and water drops, find out short circuit position and strengthen insulation.
3. Fault: Instrument displays infinity.
   Possible reasons: Pt100 RTD sensor or lead wire short circuit, or connection terminal loosening, etc.
   Processing method: Change the resistance body, or welding and tighten the thread screw.
4. Fault: Relation between Pt100 RTD sensor resistance value and temperature has changed.
   Possible cause: Resistance wire of Pt100 RTD sensor become corrosive and degenerative.
   Processing method: Replace resistance wire of Pt100 RTD sensor.