P-1 (P-1Tr)

Retained product information

P-1 temperature receiver in the IR-117M system P-1, also referred to as P-1Tr, is an aircraft temperature receiver used in IR-117 / IR-117M engine operating mode indication systems. The unit measures outside air temperature and provides an electrical signal for temperature correction of engine mode indication. It is not a cockpit indicator by itself. The receiver works as a sensing element in the measurement chain, allowing the engine mode system to account for ambient temperature when assessing operating conditions. Temperature measurement through P-1Tr The receiver converts outside air temperature into a change of electrical resistance. This resistance value is transmitted to the receiving instrument or measuring circuit, where it is used for correction of engine operating mode parameters. Since air temperature changes with altitude, weather and flight conditions, the temperature input is necessary for more accurate indication. The unit is designed for stable measurement and fast thermal response, so the sensing element can react quickly to changing airflow temperature. P-1 with IR-117 and IR-117M instruments The temperature receiver operates together with the IR-117 / IR-117M system elements, including pressure receivers, altitude correction sensor and cockpit engine mode indicator. In this chain, P-1 supplies the temperature correction input, while pressure sensors provide compressor outlet and atmospheric pressure data. If the engine mode indication is incorrect, the check should include not only the temperature receiver, but also the wiring, connector, measuring current, pressure sensors and receiving instrument. Aircraft application of P-1 / P-1Tr The receiver is used on aircraft and helicopters equipped with compatible engine operating mode indication systems. In helicopter applications, it is associated with IR-117 and IR-117M sets used for monitoring engine modes under different flight conditions. Exact installation depends on aircraft type, engine configuration and system layout. Because temperature receivers may differ by resistance characteristics, mounting version or documentation reference, replacement should be confirmed through the aircraft and system documentation. Identification and ordering of P-1 temperature receiver Before ordering, the full designation should be checked against the product passport, IR-117 / IR-117M documentation or aircraft parts catalog. It is useful to confirm the resistance values, mounting length, connector arrangement and installed system version. For correct selection, provide the aircraft type, engine type, indication system designation and a photo of the existing receiver or passport entry if available. The product is also known under alternative designations P-1, P-1Tr and П-1. Related instruments: DVK, IR-117M, PM-10MR. These links support system navigation and do not indicate interchangeability.

P-1 (P-1Tr): purpose and identification

P-1 (P-1Tr) is a Temperature Sensor that converts the temperature of the monitored medium into a signal for the associated instrument or system. The exact execution is determined by the complete marking, series and documentation. A similar housing, common opening characters or a related function does not establish matching ratings.

This category contains different equipment classes: temperature receivers, thermometers, air- and liquid-pressure receivers, regulators and individual measurement units. The actual function of the item is therefore more important than the broad category name. Read the designation with every letter, digit, hyphen, version and series reference preserved.

Function in the measurement system

The item converts the temperature of the monitored medium into a signal for the associated instrument or system. It is not necessarily a stand-alone indicator; depending on the design, it may operate with a remote indicator, regulator, pressure line or measurement set. The applicable documentation defines the circuit, medium, supply, range and connection arrangement.

For a temperature item, confirm the sensing principle, monitored medium, range and compatible indicator. For a pressure receiver, also confirm pressure type, channel count, ports, heating, drainage and connected lines. An RF measurement receiver must be selected by its own radio-frequency data rather than by requirements intended for an aircraft pressure or temperature sensor.

Selection by designation

Before ordering, compare the primary and alternative designations, execution, range, output, electrical supply, connector or ports, mounting, dimensions and mass whenever documented. Numerical values in Technical Details are retained from the previous card or a supporting source and must be checked against the passport for the actual unit.

Related modifications may differ in channel count, resistance, calibration, working medium, measurement limit, heater voltage or mounting interface. Do not treat them as interchangeable without an explicit documentary reference. General technical background is available under Temperature Sensor.

Pre-installation inspection

Incoming inspection includes checking the marking and documentation and examining the housing, sensing element, connector, pressure ports, drainage holes, mounting points and seals as applicable. Reject or investigate cracks, deformation, corrosion, contaminated passages and damaged contacts. Test the unit under the approved procedure for the exact execution.

After installation, check line tightness or electrical continuity, routing of pressure lines and wiring, and then perform the prescribed functional test. External integrity alone does not establish measurement accuracy. Assign an aircraft application only when supported by a passport, illustrated parts catalogue or maintenance document.

Related catalogue positions

Functionally related products include EP-309T, P-63, P-64, P-77 Version 2. They are grouped by measurement function for navigation and do not imply interchangeability. More items are listed in the Pressure & Temperature Sensors category.

Enquiry information

An enquiry for P-1 (P-1Tr) should state the complete designation, quantity, required condition, marking photograph, delivery scope and required documents. When available, identify the associated indicator, regulator or system. Price, actual availability, condition, lead time and documentation are confirmed separately for the offered unit.