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Handheld circuit breaker finder with plug-in transmitter and receiver unit, matte grey finish

MASTECH

MASTECH MS5902 Circuit Breaker Finder 220V CATII 600V

SKU CH-DP1B-Y1870

Locates the correct breaker or fuse automatically and checks socket wiring on 220 V AC circuits rated to CAT II 600 V

  • Product typeDigital Multimeters
  • Automatically locates the correct breaker or fuse
  • Identifies circuit socket conditions quickly and easily
  • Transmitter operates on 220 V AC circuits
  • Receiver signals matching breaker with audible beep and LED change
  • Rated for CAT II 600 V measurement category

Circuit Breaker Finder for 220 V Mains

The MASTECH MS5902 locates the correct breaker or fuse on a 220 V AC circuit without trial and error. It pairs a transmitter that plugs into an outlet with a receiver that scans the panel. Electricians and DIY users can identify the protective device quickly and safely.

Transmitter and Receiver Work Together

The transmitter injects a traceable signal into the socket while the receiver beeps and switches its LED from red to green only at the matching breaker. A socket adapter is required for light fixtures and must be purchased separately. The kit also checks socket wiring condition at the outlet.

Verify Mains Voltage and Panel Access Before Buying

This unit operates on 220 V AC only; the 110 V variant is a different model. Confirm the installation is within the 0 to 50 °C operating range and that the breaker panel is accessible for the receiver scan. CAT II 600 V rating covers standard distribution circuits.

How it compares

Measured against everything we stock in Meters, Testers & Measuring Tools, at today’s prices. Recalculated every night.

Price $44.99
Cheaper than about 56% of the 3,030 comparable items (median $54.99).

Specifications

Product
Product typeDigital Multimeters

Questions about this item

Will the transmitter or receiver need batteries replaced after long use?

The transmitter plugs into a live 220 V AC socket so it draws power directly from the circuit, while the receiver is battery powered and will need fresh cells when its LED or beeper weakens.

What stops the finder from working on a hot summer day in an attic?

The specified operating range tops out at 50 °C, so sustained ambient heat above that limit will halt reliable operation before any other factor.

How much heat or noise does the receiver produce when scanning a panel all day?

The receiver is a handheld scanner with no fan or moving parts; it stays silent and generates only negligible warmth from its own electronics.

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