allsun Electric Fence Tester & Fault Finder EM555 Blue — 0.3–9.9 kV LCD, Pulse-Activated, 57-inch Lead

The allsun EM555 is a compact digital electric fence tester and fault finder that reads fence voltages from 0.3 kV to 9.9 kV and pinpoints breaks or weak spots for quick maintenance.

Small enough to carry in a pocket and rugged enough for field work, the EM555 gives a clear LCD readout of fence line voltage and uses a pulse-activated, power-saving design so it only runs when a live pulse is present. It’s built for farmers, ranchers, and property managers who need a reliable, handheld tool to check energizers and locate faults along hot-wire fencing.

How does this tester show fence voltage in the field?

The EM555 displays measured voltage on a backlit LCD, reporting values from 0.3 kV up to 9.9 kV. It samples fence pulses and presents an easy-to-read numeric value so you can confirm the energizer output or judge whether a line is performing correctly.

• LCD display with clear numeric readout
• Detects pulse-powered voltage; reads from 0.3 kV to 9.9 kV
• Fast sampling for immediate feedback
• 57-inch lead wire for reach to fence and ground

Can the EM555 help locate faults along my fence line?

Yes — by measuring voltage at multiple points and noting where the reading drops, you can narrow down the area of a short or break. The unit’s portability and long test lead make it useful for walking a line and testing at posts, gates, and suspected fault zones.

• Use progressive measurements to triangulate low-voltage sections
• Portable 57-inch wire reaches awkward posts and gates
• Quick on/off pulse detection speeds troubleshooting
• Works on both hot fence wires and energizer outputs

What power and battery features should I expect?

The EM555 is designed to conserve battery life by activating only when it senses a fence pulse; it automatically shuts off after about four seconds without a detected pulse. This behavior extends working time in the field and reduces the need for frequent battery changes.

• Pulse-activated operation prevents continuous drain
• Automatic shut-off after roughly four seconds when idle
• Lightweight design keeps it easy to carry all day
• Durable build for routine outdoor use

How easy is it to use for routine fence maintenance?

The EM555 was made for straightforward, repeatable checks: connect the leads to the fence and ground or touch the probe to the wire, read the LCD, and move on. Its readable display and simple operation make it suitable for daily or seasonal inspections without technical setup.

• Plug-and-play testing — no programming required
• Readable numbers help non-technical users assess performance
• Compact form fits a tool belt or glovebox for quick access
• Identifies both energizer output and line voltage drops

Who this is for: The allsun EM555 is aimed at livestock owners, fence contractors, land managers, and hobby farmers who need a dependable, portable voltage tester and fault finder. If you perform regular fence inspections, troubleshoot intermittent shorts, or verify energizer output, this device streamlines checks and helps you keep fencing effective with minimal fuss.