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Yellow handheld insulation tester with display and test leads in soft case

METALBEE M500 Megohmmeter 500V 20-1000MΩ Insulation Tester

SKU CH-1RGS-FRPWZ

Tests insulation resistance up to 1000 megohms at 500 volts for motors, transformers and HVAC systems

  • Team affiliation1 Piece
  • Key featuresM500 INSULATION TESTER MEGOHMMETER, Battery Powered, false
  • Overall height7 L x 3.8 W x 2.4 H inches
  • Overall width7 L x 3.8 W x 2.4 H inches
  • Overall length7 L x 3.8 W x 2.4 H inches
  • Tests insulation up to 1000 megohms at 500 volts
  • Resistance grading shows Good Normal Risk status instantly
  • Rugged ABS housing resists impacts and abrasion on site
  • Battery powered with 6 inch leads and soft carry case
  • Designed for HVAC motor transformer and panel relay checks

500 V Insulation Tester

The METALBEE M500 measures insulation resistance from 20 to 1,000 megohms at 500 volts AC. It is built for technicians who service motors, transformers and HVAC systems. A resistance grading system shows Good, Normal or Risk status on the display. Battery power and a soft carrying case support field use.

Upgrade from Basic Multimeters

A standard multimeter cannot apply a 500 V test voltage, so it misses high-resistance insulation faults. The M500 adds that capability along with dedicated motor winding, compressor and relay checks. The jump is worth it when preventive maintenance calls for quantified insulation data rather than simple continuity.

500 V Test Voltage Limit

The tester applies a fixed 500 V AC, so it cannot evaluate equipment rated for higher test voltages such as 1 kV or 2.5 kV class insulation. The 6-inch leads restrict reach inside large panels or deep windings. Users needing variable voltage ranges or longer leads will need a different instrument.

How it compares

Measured against everything we stock in Multimeters & Electrical Testers, at today’s prices. Recalculated every night.

Price $54.99
Pricier than about 78% of the 971 comparable items (median $30.99).

Specifications

Product
Brand nameMETALBEE, MetalBee
Size & build
Overall height7 L x 3.8 W x 2.4 H inches
Overall width7 L x 3.8 W x 2.4 H inches
Overall length7 L x 3.8 W x 2.4 H inches
More details
Team affiliation1 Piece

Questions about this item

How much space does the 7 by 3.8 by 2.4 inch M500 megohmmeter need in a tool bag?

The unit measures 7 L x 3.8 W x 2.4 H inches, so it fits in most standard tool pouches or the included soft carrying case without extra room.

What is the correct way to install batteries in the M500 and what step is often missed?

Open the removable rear panel, insert the required batteries observing polarity, then close the panel fully; the step often missed is not seating the panel latch completely, which can cause intermittent power.

When should the 6 inch test leads on the M500 be replaced?

Replace the leads if the insulation shows cracks, the probes become loose, or resistance readings become erratic during 500 V tests on motors, transformers or HVAC compressors.

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