Speed Sensor Adapter V2
Speed Sensor Adapter V2 - Image 2
SIRHC Labs

Speed Sensor Adapter V2

$43.00

The Speed Sensor Adapter V2 converts complex signals from variable reluctance (VR) sensors or magnetoresistive (MR) ABS sensors into a clean 0-5 V or 0-10 V square wave. This digital signal is easily interpreted by most aftermarket electronic devices requiring a digital speed or RPM signal, including engine control units (ECUs), boost controllers, nitrous controllers, and speedometers.

Key Capabilities:

  • Wide Sensor Compatibility: Designed to interface with virtually any passive VR sensor and most active MR sensors for reliable, clean signal translation.
  • Precision Engineering: Built around the Maxim MAX9924 chip—industry-standard hardware specifically designed for automotive crankshaft, camshaft, and transmission speed sensing.
  • Versatile Output: Fully configurable to your project’s requirements, offering 0-5 V, 0-10 V, or open-drain output options.

IMPORTANT NOTE: This device converts passive VR or active MR (2-wire Hall) sensor signals into a standard digital square wave. It cannot convert a VR signal into a MR (current-based) signal.

↓ DOWNLOAD INSTRUCTIONS ↓

Own a 2011+ Mustang or F-150? Save time with our direct-fit, plug-and-play ABS sensor adapter. Get a rock-solid speed signal without tapping into a single factory wire.

In stock

Applications

  • Converts raw AC signals (VR) or current-based digital signals (MR / 2-wire Hall) into a clean, frequency-matched 0–5 V or 0–10 V square wave.

Supported Sensor Types

  • Passive VR Sensors: All types (transmission speed, ABS wheel speed, cam/crank position).

  • Active MR (2-wire Hall) ABS Sensors: Compatible with sensors using the Switching Protocol (see test procedure below).

Technical Specifications

FeatureDetails
Supply Voltage12–40 V
Output Type0–5 V, 0–10 V, or Open-Drain
Max Input Voltage±200 V
Dimensions2.6″ W × 2.0″ H × 0.8″ D
Wire LengthApprox. 12″ (22 AWG)

Sensor Compatibility Test Procedure

If you are unsure of your sensor type, use a standard multimeter to perform the following steps:

Step 1: VR Sensor Identification

  1. Disconnect the ABS sensor from the module.

  2. Connect multimeter probes to the sensor terminals (polarity irrelevant).

  3. Set your multimeter to AC Voltage and spin the wheel.

  4. Result: If you measure an AC voltage that increases with speed, it is a VR sensor. If you measure nothing, it is a MR sensor—proceed to Step 2.

Step 2: Switching Protocol Test (MR Sensors Only)

  1. With the ABS sensor connected to the module and the ignition in the ‘ON’ position, set your multimeter to DC Voltage.

  2. Identify the Signal Wire: Measure the DC voltage between each ABS sensor wire and ground.

    • CASE 1: You measure ~11–12 VDC on one wire and 0 VDC on the other. The wire measuring ~11–12 VDC is your signal wire.

    • CASE 2: You measure ~11–12 VDC on one wire and 0.35–1.5 VDC on the other. The wire measuring 0.35–1.5 VDC is your signal wire.

  3. Test for Protocol: Connect your multimeter to the signal wire identified above and spin the wheel very slowly by hand.

    • Compatible: If the sensor uses the Switching Protocol, you will see the DC voltage oscillate between two distinct values (e.g., 0.5 VDC and 1.0 VDC) as the tone ring teeth and valleys pass the sensor.

    • Incompatible: If the voltage on the signal wire remains constant (no oscillation) while the wheel turns, the sensor uses an incompatible communication protocol (such as AK or PSI5).