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What Is a Substitution for a Multimeter?

Multimeters are a nearly universal tool for electronic technicians and hobbyists. All of them measure voltage, current and resistance. Some measure frequency and capacitance, check diodes and even monitor for intermittent voltages. All of these features come at a price, of course, and sometimes a simpler, smaller or less-expensive meter is more suitable for the work at hand. These alternatives include dedicated panel meters, specialized industrial meters and older analog meters.

Panel meters
- Panel meters are installed permanently.
  
  Use a panel meter for test equipment or a dedicated monitor that will not have to be moved. Panel meters are made to be attached to the front panel of a piece of equipment. They measure voltage, current and power-line frequencies. Compared to digital multimeters, panel meters can be obtained inexpensively. Most are bolted permanently into place.
Clamp-on Ammeters
- Antique ammeter with two exposed brass terminals.
  
  Use a clamp-on ammeter to measure current on an electrical line without making a physical connection. Clamp-on meters work by sensing the alternating magnetic field that surrounds a conductor that carries alternating current, or AC. Since there's no connection to potential high voltages, these meters offer greater operator safety. Their large size makes them unsuitable for electronic work. Clamp-on meters are more commonly used by electricians.
Megohmmeters
- Use a megohmmeter, or "megger," to troubleshoot for weak current leakage. Meggers work by applying a high voltage to the wiring in a piece of electronic equipment. As a result, they may not be safe for use on sensitive digital electronics. Always check with the manufacturer before use. Meggers can detect very small currents through aging capacitors or diodes, and they can even detect pinched wires whose insulation is breaking down.
Analog multimeters
- Older analog multimeters can often be found on the used market.
  
  Consider an analog multimeter, or VOM, if you're on a tight budget. They'll perform most common functions with enough precision for home use. Older professional analog meters from Simpson and Triplett can often be found on the used market in good working condition. They're heavy and bulky, but they'll work almost forever.

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