MeterMatch is wired between your sender (sensor) and your gauge. It reads the resistance of the sender, then based on your user-defined internal calibration values, it electronically emulates the sender signal to drive the gauge to the desired reading. It treats the input and output entirely separately, so it doesn't care if the input to the gauge is scaled differently than the sender, or even if the sender signal has a reversed sender signal than the gauge - it can correct for that.

To calibrate MeterMatch, you first set the sender to a known value. For example, fill your fuel tank. Set the MeterMatch to program mode, then with the up and down buttons, make your gauge read what you want for that sender value. When you are satisfied with the reading, press the "save" button, and the value is remembered in the MeterMatch. Do the same process with the sender reading a value near the other end of its range, and you are done. MeterMatch interpolates from these values to make the gauge read proportionately at values above, below, and between the calibration values. It also has cardinal-point values stored inside that you can use if you know the resistance of your sender.

The basic process of having the gauge read properly from calibration points near each end of the range is fine for most applications, but you can be more sophisticated if you wish. For example, what if your fuel tank is large at the bottom, and small at the top? In this case, it won't read properly throughout the range. MeterMatch provides two additional calibration points between the endpoints. So, in this case, you could have an additional calibration point where the tank changes size. Another use for these points would be if your tank is cylindrical (like a truck fuel tank) so the gauge is inaccurate at both sides of center. Here, you can add additional calibration points (for example at 30% and 70%) and the accuracy is drastically improved. Or - you can simply use the additional cal-points to provide improved accuracy at mid-scale points.

The calibration values are stored in non-volatile memory inside MeterMatch, so they remain, even when no power is connected to the unit.

For complete details about installation, use, limited warranty, and return policy, refer to the MeterMatch Instruction Manual. While MeterMatch has been designed to accommodate a wide range of applications, everything that you might try to mix and match can't be anticipated. So if you find that it doesn't work in your application, MeterMatch comes with a money back guarantee. Please look over the MeterMatch FAQ for more information prior to purchase.

This MeterMatch video describes MeterMatch installation and use. While it contains a lot of detailed information, most of the information you will need for the typical installation and programming (calibration) is included in the first few minutes. If you would like to move around to see particular topics, here are the start times for the various sections: 0:00 Introduction/Overview, 1:51 Wiring, 3:19 Basic Calibration, 6:34 Calibration with known values, 10:46 Alarm LED, 14:45 Voltage Correction, 17:02 Reading Averaging, 18:38 Other Calibration Ideas. Note that all of the information included in the video is also in the instruction manual which may be used for reference to augment the video. The video is also available on YouTube, click here.

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Ford and Chrysler gauges of the 60's and early 70's have an electro-mechanical voltage regulator to drive the instruments, which typically include the temperature and fuel gauges. The MeterMatch MM-02 has been designed to work in conjunction with these electromechanical regulators without repowering the gauge. The MeterMatch MM-02 replaces the earlier MeterMatch-VR unit.

While MeterMatch is typically used when mixing and matching senders and gauges, it can be used for other things as well.

Here's an article by a good engineer from Accutach, Mark Olson, about how he used MeterMatch modules to make the temperature and oil pressure gauges in a late model Mustang much more usable and accurate...

1978-1998 Mustang gauge upgrade with MeterMatch.

A MeterMatch is also used in another unique application. Early British Morris Minors only have two gauges: a speedometer and a fuel gauge. In this installation, the user installed a toggle switch under the dash, along with a MeterMatch connected to a temperature sensor on the engine, to allow the switch to toggle the fuel gauge to serve as either a fuel gauge or a temperature gauge. Other than the switch under the dash, the car still looks perfectly stock, but has more useful instrumentation now.

In another application, a MeterMatch with minor modification is used to refill a generator fuel tank from the main tank. The MeterMatch monitors the fuel level in the tank, using the high/low alarm capability to control an external automotive-type relay to turn a pump on and off to refill the tank as fuel is used.

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MeterMatch is shipped via priority mail which normally takes two-three days for delivery from time of shipment for domestic orders. Shipments are typically made within one working day from time of order. See below for optional wiring kit and alarm LED accessories.