P-102 / P102-MS-400

P-102 / P102-MS-400 aircraft temperature sensor

P-102, full factory designation P102-MS-400, is an aircraft resistive temperature sensor used to measure stagnation temperature of an air flow. The sensor converts air temperature into an electrical resistance signal and transmits this signal to electronic engine regulators, automatic control systems and other aircraft equipment. It is used where accurate temperature information is required for engine control, air-system regulation or thermal monitoring.

Function of the P-102 temperature receiver

The main function of P-102 is to measure the temperature of the controlled air flow or thermal zone and provide an analog resistance output. The unit operates on the principle of a resistance thermometer: the electrical resistance of the sensing element changes according to temperature. This signal is then used by onboard systems for calculation, regulation or protection functions. In engine-control applications, air temperature data can support fuel scheduling and control of gas-turbine operating modes.

P102-MS-400 construction and sensing elements

P102-MS-400 is built as a flanged immersion-type aircraft resistance thermometer. The unit has a metal body with a mounting flange and an immersion probe containing the sensing elements. According to the source context, the sensor includes two independent measuring resistors, which provide two separate output resistance signals. This dual-channel arrangement allows redundancy or parallel use by different onboard circuits. A fixed cable lead connects the resistors to the aircraft wiring system.

Installation areas of the P-102 sensor

The P-102 sensor is installed directly on an engine housing, air duct, inlet assembly or controlled equipment body, depending on the aircraft system. The working probe is immersed into the monitored air flow or thermal zone, while the cable lead remains outside for connection to the onboard network. The source context indicates possible use in gas-turbine engine flow paths, inlet guide vane areas, anti-icing air ducts, air-conditioning systems and thermal monitoring areas of engine-control equipment.

Measurement accuracy and response of P102-MS-400

P102-MS-400 provides temperature measurement over a wide aircraft operating range. Its static error depends on the temperature interval, while dynamic behavior is defined by the time constant in airflow. The source context specifies a response time limit when the airflow speed is at least 45 m/s. Each sensor is supplied with individual calibration data showing resistance versus temperature at defined reference points, which allows the receiving equipment or maintenance personnel to verify the sensor characteristics.

Ordering and replacement of P-102 / P102-MS-400

When ordering P-102 / P102-MS-400, the buyer should confirm the exact designation, cable length, mounting configuration and required documentation. Since aircraft temperature sensors can be similar in appearance but differ by resistance curve, calibration category, cable assembly and mounting interface, replacement must be checked against the aircraft or engine system documentation. Product passport, calibration table, test report, storage records and condition should be confirmed before supply.

Product Type: Aircraft resistive temperature sensor / air temperature receiver
Designation: P102-MS-400
Alternative Designations: P-102, P102, P102-MS-400, П-102, П102-МС-400, датчик температуры П-102
Function: Measurement of air-flow stagnation temperature and output of resistance signal
Measurement Principle: Resistance thermometer principle
Measured Medium: Air flow / controlled air environment depending on system installation
Application / Where Used: Electronic engine regulators, automatic control systems, engine air paths, anti-icing ducts and air-conditioning systems
Compatible Equipment: Gas-turbine aircraft engines and aircraft air systems depending on documentation
Sensor Construction: Flanged immersion-type metal sensor with protective probe and cable lead
Number of Measuring Channels: 2 independent measuring resistors
Output Signal: Two isolated analog resistance signals
Temperature Measurement Range: −60 °C to +200 °C
Resistance at 0 °C: 46 ±0.25 Ω
Static Error at +30…+110 °C: ±2 °C
Static Error at +110…+170 °C: ±3 °C
Time Constant: Not more than 6 seconds at airflow speed ≥45 m/s
Calibration Category: Category II according to OST92-0694
Calibration Data: Resistance-temperature table in product passport
Reference Calibration Points: −100, −50, 0, +20, +50, +100, +150 and +200 °C, according to source context
Cable Length Reference: 1500 ±30 mm, according to source context
Cable Type: Shielded aircraft cable in heat-resistant braid, according to source context
Mounting: Round welded metal flange with mounting holes
Immersion Part: Cylindrical probe with fixed sensing elements inside protective sheath
Sealing: Monolithic sealed construction
Weight: Not more than 0.12 kg
Condition: New / As-Stored / Serviceable, depending on availability
Technical Documentation: Product passport, calibration table, test report, storage records and aircraft system documentation if available

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Warranty
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