My fence should produce max 7K volts but this tester is showing 10K. Any suggestions as to why?

My energisers (I have two) used to give about 4 or 5k volts on long runs with triple layered tape. Now they have to energise much shorter runs of two levels of tape. The shorter one goes up to 10k and the longer generally shows about 6k. Is it that your run of tape is not particularly long? It might just be a case of that. Otherwise, I don't know.

How do you change the batteries?

A bit fiddly, Unscrew the crosshead screw on the back and remove. gently prise the two halves of the body apart, working from the loop at the bottom to the top. This exposes the entire circuit board. This simply falls out of the casing, so does the red button. You'll find the 'hearing aid' battery housed on the back of the circuit board. I did not actually try to remove this, as it is still working fine. Put the circuit board back on its two lugs (where it says 'high voltage' and reassemble. You have to take care not to lose or drop anything, but it is not difficult.

How does this work? Does it earth through your contact with the ground instead of a spike?

It has a small battery inside. You si.ple touch the metal plate on the back to the fen6you want to test , press and hold the red button and the appropriate number of light come on, more lights, more volts. I think the battery provides a reference voltage or something. Earthing is NOT needed. I like it. Only problem Is that the back plate is narrower than most electric fence tape, so you have to fiddle a bit to get a good contact, or find a place where the tape has folded over.. BTW pressing the red button light a red light. If it does not, the battery needs changing. Hope this helps.

Is it safe to use this on a 12kV fence

The tester is designed to measure only up to 10KV, so if you use it on an output of 12Kv you will risk damaging it.

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Electric Fence Line Tester | Electric Fence Voltage Tester | High Voltage Test Indicator For Electric Fencing.

Electric Fence Line Tester | Electric Fence Voltage Tester | High Voltage Test Indicator For Electric Fencing.

Product ID: 150690812

Details

Brand
Hotline
Colour
Black
Item weight
50 Grams
Power source
Electric
Style
Voltage

⚡Measures up to 10kV in 1kV increments

📏Compact pocket-sized design

🔋Batteries included, ready to use

48771CFA

Duties & taxes included

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Sold byAmazon SenegalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Stay Shockingly Ahead with Every Fence Check!

NO EARTH STAKE NEEDED - Simplifies testing by eliminating the need for an earth stake—just place and read instantly.
POCKET SIZED PORTABILITY - Lightweight and compact, this tester fits in your pocket for on-the-go convenience with batteries included.
PRECISION VOLTAGE INSIGHT - Accurately measures electric fence voltage up to 10,000V in easy 1kV steps for flawless fence management.
ULTRA BRIGHT LED INDICATORS - Clear, bright LED lights ensure quick and reliable voltage readings even in low light conditions.
UNIVERSAL FENCE COMPATIBILITY - Works seamlessly on all types of electric fences, making it the go-to tool for any fencing setup.

The Electric Fence Line Tester by Hotline Electric Fencing is a compact, handheld device designed for quick and accurate voltage measurement up to 10,000 volts in 1kV increments. It features ultra-bright LED indicators, requires no earth stake, and is compatible with all fence types. Lightweight and battery-powered, it’s the essential tool for professionals seeking reliable fence performance with effortless portability.

Specifications

ASIN	B07VB4XKJT
Best Sellers Rank	1,828 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 11 in Voltage Testers 1,670 in Agricultural Equipment & Supplies
Brand	Hotline Electric Fencing
Colour	Black
Country Of Origin	China
Customer Reviews	4.4 out of 5 stars 490 Reviews
Item Dimensions	8.5 x 4.5 x 2 centimetres
Item Weight	50 Grams
Item dimensions L x W x H	8.5 x 4.5 x 2 centimetres
Item weight	50 Grams
Manufacturer	Hotline Electric Fencing
Manufacturer Part Number	47KV10
Measurement Type	Voltmeter
Minimum Operating Voltage	1 Kilovolts
Model Number	47KV10
Power Source	Electric
Power source	Electric
Specification Met	[OTHER]
Style	Voltage
Style Name	Voltage
UPC	036336756144
Unit Count	1.0 count

Reviews

A**B

Works Great ⚡️

Excellent gadget . No need for earth wire . Just leave tester on fence . Very convenient . Accurate as well . Tried it on electric fence with new battery and on another one that was dying . It was spot on . Small device that can fit in your pocket .

7.09.2024

A**R

Easy to use

Bought this quite a while ago and is still going strong. Nice and easy to put against electric fence to check working

2.09.2025

L**S

Vey efficient!

Perfect for popping on your key ring and so easy to test the fencing!

10.11.2025

F**C

It works

Useful device. The scale helps you determine where the fence line is losing energy

6.02.2026

J**H

Outstanding product!

This is an excellent little fence tester, I'm very pleased with it indeed! Simple to use, easy to read, works like a charm and fits easily into your pocket, what's not to like? I only wish I'd bought one years ago!

9.03.2026

A**N

Good

A nice, handy tester, easily fits in a pocket. It works well and is very easy to use, with a very clear display that is easy to see in bright daylight.

17.11.2024

T**Y

Good value for money

Excellent value for money. Will definitely buy again.

27.12.2025

K**E

Handy piece of kit for equestrians!

So much easier not having to stick a bit in the ground when testing fencing is working around the paddock. Handy size to keep in my pocket.

17.09.2025

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