Aviation plug type platinum thermoresistor

In the fields of industrial automation and precise temperature measurement, the aviation plug type platinum thermoresistor (also known as aviation plug type thermal resistor or socket type thermal resistor) has become an indispensable Temperature Sensor in various applications such as mechanical equipment, petrochemical industry, aerospace, etc., due to its unique advantages such as convenient installation, strong shock resistance, and quick replacement. This article will provide you with a detailed analysis of the technical features, core parameters, and selection tips of this product, helping you make a more accurate purchasing decision.

What is an aviation plug type platinum thermoresistor?

An aviation plug type platinum thermoresistor is A Temperature Sensor that combines the temperature sensing element of a platinum thermoresistor with an aviation plug (connector). Its core sensing element is a platinum thermoresistor (typically Pt100 or Pt1000), which measures temperature by utilizing the linear change in resistance of metallic platinum with temperature. The most significant structural feature of it is that the end adopts an aviation socket/plug form, replacing the traditional direct leads or ordinary junction boxes.

This design enables the sensor body and the connecting wires to be separated quickly, greatly facilitating the installation, maintenance and replacement of the equipment.

Core structure and features

The structure of the aviation plug type platinum thermoresistor usually consists of the following components: the temperature sensing element (platinum resistor), the protective tube, the installation fixing device (such as threads or flanges), and the aviation plug.

• Plug-and-play, easy to maintain

The use of aviation plug connection method makes the sensor extremely convenient during equipment wiring or later maintenance. When the sensor needs to be disassembled for inspection or replacement, simply unplug the plug, without the need to disassemble the entire circuit. This is particularly suitable for use in situations with limited space or complex wiring.

• Excellent seismic resistance and protection performance

The aviation plug is securely connected and usually equipped with a locking device, which can effectively prevent contact failure caused by equipment vibration. Additionally, when combined with a waterproof aviation plug, the overall protection level of the sensor can reach IP65 or higher, capable of resisting the erosion of oil, water, and dust, and suitable for harsh field environments.

• High temperature measurement accuracy and rapid response

The temperature sensing element adopts platinum resistance (Pt100), which complies with the IEC751 international standard. The temperature coefficient TCR is 0.003851, and it has excellent long-term stability. Since the probe part can be made into a armored structure, the diameter is relatively small (some products can be as small as Φ4mm - Φ6mm), and the thermal response time is very fast. Usually, t0.5 is less than 30 seconds, and some models can even reach 15 seconds.

• Dual-element Design

Some models (such as WZP2-269) can be equipped with two platinum resistance elements inside, enabling redundant measurement or control to be carried out simultaneously, thereby enhancing the safety of the system.

Key technical parameters and selection

When purchasing aviation plug-type platinum thermoresistors, the following technical indicators need to be given particular attention:

• Tolerance Number and Precision

Tolerance Number: The most common one is Pt100 (its resistance value at 0℃ is 100Ω). Besides, there are also options like Pt500 and Pt1000. Pt1000 has a larger output signal and is more suitable for long-distance transmission or for connecting to instruments with high sensitivity requirements.

Accuracy grade: It is usually divided into grade A and grade B. The accuracy of grade A is ±(0.15 + 0.002|t|) °C, and the accuracy of grade B is ±(0.30 + 0.005|t|) °C. For higher precision requirements, higher accuracy grades such as 1/3 DIN or 1/10 DIN can be customized.

• Temperature Measurement Range

The temperature measurement range varies depending on the material of the protective tube and the filling material. Standard products can cover a range from -200℃ to 450℃, while some specially designed models can handle higher temperatures.

• Pipe material and diameter

Material: Commonly used materials include 304 stainless steel, 316L stainless steel, 321 stainless steel, etc., to meet the corrosion resistance requirements for different media.

Diameter: The diameter of the probe (D) has common specifications such as Φ6mm, Φ5mm, Φ4mm, etc. A smaller diameter leads to a faster response, but the mechanical strength decreases accordingly.

• Installation Fixing Method

The most common installation method is threaded fixation, such as M12×1.5, M16×1.5, M27×2, etc. The type should be selected based on the threaded openings of the on-site pipelines or equipment.

• Wiring Configuration

To eliminate the influence of wire resistance on the measurement, aviation plug type platinum thermoresistors usually adopt a three-wire connection. In extremely precise applications, a four-wire connection is used. Two-wire connection is suitable for scenarios where the length of the wires is not strictly required.

Application fields

Due to its unique connection method and reliable performance, the aviation plug type platinum thermoresistor is widely used in:

Industrial machinery: such as injection molding machinery, compressors, hydraulic systems, and the measurement of engine oil temperature and coolant temperature.

Petrochemical industry: It is used for temperature measurement in pipelines and reaction vessels, taking advantage of its quick plug-and-unplug feature to facilitate equipment maintenance.

Aerospace: Suitable for temperature measurement of aircraft piping in applications where high vibration resistance is required and installation space is limited.

Rail Transit and New Energy Vehicles: Temperature monitoring for motors, gearboxes, and battery packs.

Research experiment: Suitable for laboratory settings where sensors need to be frequently replaced or where multi-point temperature measurement is required.

Summary

The aviation plug type platinum thermoresistor combines the high accuracy of the platinum resistor with the convenient connection of the aviation plug, making it an ideal choice for modern industrial equipment to achieve modular and intelligent temperature measurement. When selecting, please make sure to confirm your temperature measurement range, accuracy requirements, installation thread specifications, and the insertion depth of the probe to ensure that the sensor can perform at its best in your equipment. If you are looking for a reliable and durable temperature sensor solution, the aviation plug type platinum thermoresistor is undoubtedly a product type worth considering as a priority.