MU-615A Series 1

MU-615A Series 1 in aircraft position measurement systems

The MU-615A Series 1 is a potentiometric angular displacement sensor used in aircraft and helicopter equipment. It converts the angular movement of a shaft or control mechanism into an electrical resistance signal. In onboard systems, the sensor works as a position feedback element, helping connected equipment determine the actual position of a linkage, actuator, control surface mechanism or other rotating mechanical part.

Angular displacement measurement by MU-615A Series 1

The main function of the MU-615A Series 1 is to measure angular position within a specified working range. When the connected shaft rotates, the sensor changes its electrical output in proportion to the angular displacement. This signal is then transmitted to aircraft control, indication or measurement circuits. Correct operation depends on proper installation, shaft alignment, neutral setting, wiring condition and compatibility with the receiving equipment.

Potentiometric operating principle of MU-615A Series 1

The MU-615A Series 1 operates on a potentiometric principle. Rotation of the input shaft moves the contact element along a resistive track, changing the resistance value seen by the connected circuit. This type of sensor is simple and effective, but its accuracy depends on the condition of the resistive element, contact group and mechanical shaft assembly. Wear, contamination, poor contact or incorrect mounting can lead to unstable readings or increased measurement error.

MU-615A Series 1 in control and feedback circuits

The sensor is used in aircraft control and measurement systems where the position of a mechanical element must be monitored. Typical applications include control linkages, actuator feedback circuits, control surface mechanisms and other onboard systems where angular position information is required. In these circuits, the MU-615A Series 1 provides feedback to the equipment, allowing the system to compare commanded and actual mechanical position where such logic is provided.

Installation context of MU-615A Series 1

The MU-615A Series 1 is installed directly in mechanical assemblies where rotational movement must be converted into an electrical signal. Because of its compact dimensions, it can be mounted in limited-space aircraft equipment areas. During installation, the working angle, total angle range, direction of rotation and initial shaft position should be checked against the aircraft documentation. A mechanically suitable sensor can still give incorrect data if the shaft is installed with the wrong offset or if the linkage has excessive play.

Operating conditions of MU-615A Series 1

The sensor is designed for aviation operating conditions and can work across a wide temperature range. It also has a short-term high-temperature limit, which may be relevant for installations near heated equipment zones, actuators or engine-related compartments. Since the MU-615A Series 1 is an electromechanical component, inspection should include both mechanical and electrical checks. The shaft, housing, connector, resistance output and smoothness of signal change should all be verified before installation.

Supply and inspection of MU-615A Series 1

For procurement or replacement, the full designation MU-615A Series 1 should be specified. Alternative records may use MU-615A ser. 1, but the actual marking and documentation should be checked before shipment. Before installation, the sensor should be inspected for housing condition, shaft condition, connector integrity, resistance value, measurement error, nonlinearity and compatibility with the target aircraft system. Technical or manufacturer documentation should be supplied where available.

Product Type: Potentiometric angular displacement sensor
Designation: MU-615A Series 1
Alternative Designations: MU-615A ser. 1; МУ-615А серия 1
Function: Conversion of angular displacement into an electrical resistance signal
Application / Where Used: Aircraft and helicopter control and measurement systems
System / Installation Area: Control linkages, actuator feedback circuits and position measurement channels
Measured Parameter: Angular shaft displacement
Operating Principle: Potentiometric conversion of shaft rotation into resistance change
Operating Voltage: 6 V ±0.5 V
Working Angle Range: ±30° ±2°
Total Angle Range: ±60° ±2°
Potentiometer Resistance: 700 Ω ±200 Ω
Measurement Error: Not more than ±2%
Nonlinearity: Not more than ±1.5%
Operating Temperature Range: −60 to +150 °C
Short-Term Temperature Limit: +200 °C for up to 10 min
Dimensions: 39 × 54 × 41.5 mm
Inspection / Testing: Shaft rotation check, resistance output check, signal smoothness check, connector inspection, housing inspection and compatibility verification
Condition: As applicable
Technical Documentation: Technical documentation / manufacturer documentation

All shipments are carried out from our international warehouse in Dubai (UAE), as well as from our partners’ remote warehouses.

In Stock — items available in stock at the Dubai warehouse are dispatched within 5–10 business days after receiving 100% prepayment.

Remote Stock — items available at our partners’ remote warehouses are supplied within an average of 30–45 business days after receiving 100% prepayment.

Pre-Order — made-to-order products are manufactured and delivered within an average of 45–60 business days. Payment terms: 50% advance payment to start production, with the remaining 50% paid before dispatch from the Dubai warehouse after full readiness for shipment.

Returns & Changes (Restocking Fee)
For selected items, a RESTOCKING FEE of 10% may apply in case of return, order cancellation, or changes to the order specifications. This condition applies only to certain products and is confirmed at the order approval stage.

Warranty
All products are covered by a standard 6-month warranty.
Extended warranty is available upon request and is agreed individually; it may affect the final product price.