REV counter for petrol and diesel engines

RMU 300

The RMU 300 is MAHLE universal rev counter that transmits rev. and temperature to the receiver via bluetooth. On the one hand, it records the revolutions based on the harmonics of the car battery charging signal or via the magnetic vibration sensor. On the other hand, it measures the engine temperature using the standard temperature sensor. The optional EOBD-300 sensor is available for use with cars and lorries.


It records the revolutions based on the harmonics of the car battery charging signal or via the magnetic vibration sensor, and the engine temperature via the standard temperature sensor. The built-in rechargeable battery dispenses with the old rev counter’s need for cables to the car battery when using the magnetic vibration sensor. The user-friendly software always provides comprehensive, clearly organised information on the signal quality, current readings, and transmission quality of the signals to the receiver. Thanks to EOBD-300 (optional) the engine speed can also be recorded via OBD interface via Bluetooth.

Signal recording options:

  1. Vibration sensor
  2. Alternator harmonics
  3. EOBD connector (EOBD-300) for speed and temperature

Accessory: SG-030

The SG-030 probe (for motorcycle) records rpm differently, via phono-me- tric measurements. Highly precise, it can also be used in particularly difficult situations (ex: on trucks).

Ask us for a demonstration

Evaluate the high quality of MAHLE products directly in your workshop

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Brain: Neural network technology

RMU 300 rev counter is equipped with the special Neural Network Technology, the application of which allows the instrument, in the course of daily use, to identify and isolate the main noise signals that could (physiologically) affect the accuracy of measurement.

Contact us

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MAHLE Aftermarket Italy S.r.l.

Via Rudolf Diesel 10/a
43122 Parma
Phone +39 0521 954411
Fax +39 0521 954490

MAHLE Aftermarket S.L.U.

C/Mario Vargas Llosa 13
Pol ind Casablanca
28850 Torrejón de Ardoz, Madrid
Phone + 34 91 888-6799
Fax +3491 888 6311

MAHLE Aftermarket Deutschland GmbH

Dürrheimer Straße 49a
78166 Donaueschingen
Phone: +49 (0) 771 89653-24200
Fax: +49 771 / 897955-90

RMU 300 brochure

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