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Round Waterproof Voltmeter

4.910 reviewsIn stock SKU volt-round-red
$16.70inc. GST
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Details

The full rundown

A compact, panel-mount voltage gauge for 5V to 48V systems. It's waterproof, so it suits cars, motorbikes, 4x4s, boats and campers alike.

Why it works

  • Universal compatibility: Suitable for 12V and 24V systems in vehicles, boats, and off-grid setups.
  • Fast installation: Twist-and-lock mounting with secure retaining nut.
  • Clear LED display: Available in multiple colours for visibility and personal preference.
  • Wide measuring range: Monitors voltages from 5V to 48V.
  • Durable construction: Waterproof, flame retardant, and built for harsh environments.
  • Real-time monitoring: Track battery charge/discharge status with reverse-polarity protection.

What's in the box

  • 1 x Round Waterproof Voltmeter
  • 1 x Retaining Nut

How it works

This voltmeter fits into a round panel cutout and locks in place using a twist-and-lock system with a nylon retaining nut. Once connected to the vehicle's power supply, the 3-digit LED display provides accurate, real-time voltage readings. Its waterproof and flame-retardant housing ensures reliable operation across automotive, marine, and off-road environments.

What it suits

  • Works with 5V-48V DC systems
  • Ideal for cars, motorbikes, boats, ATVs, UTVs, caravans, campers, and trailers
  • Supports both 12V and 24V battery monitoring
  • Suitable for dashboards, switch panels, control pods, and marine consoles

Fitting it

Difficulty: 1/5 (Easy). Mount in a round cutout, secure with the retaining nut, and connect positive and negative terminals.

Features

  • Waterproof and flame-retardant housing
  • 3-digit LED display
  • Optional LED colours: red, white, blue, green, orange
  • Reverse-connection protection
  • Compact panel-mount design

Specifications

Voltage Range 5V-48V DC
Body Diameter Approx 36MM
Material Waterproof, Flame-Retardant Plastic
Display Type LED (3-digit)
Display Colours Red, White, Blue, Green, Orange
Connection Anode / Cathode Terminals
Reviews

What owners say

  • 5 stars: 9 (90%)
  • 4 stars: 1 (10%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
J
John Hall

Excellent product, fast delivery.

J
John Limnios

Well made. Works well.

J
John Jakab

just the thing i need to monitor vehicle and van batteries

p
peter lamb

great product

m
michael k

product always good and delivered in a timely manner,great to deal with.thanks

R
Rodney Hart

I finaly got to put green and red voltmeters in my trailer boat port and starboard batteries thank you

b
ben oneill

I bought 2 of these voltmeters to mount on a couple of ebikes I have so I can monitor the batteries better.
I tested one and found the display to be bright and clear, and it also matches the blue colour of my bike - so cool.
I'm still working through mounting the first one and should have it on and working this weekend.
Being waterproof and the size is perfect for what I was looking for.
Very happy ๐Ÿ˜Š

g
greg glennon

Perfect meter. Just what I needed at a great price.

P
Peter Madigan

Worked a treat

R
Richard Simonini

Nice little voltage display, easy to install.๐Ÿ˜ƒ

From the Treklo crew

G'day, we're Treklo

We're a handful of blokes in Geelong who spend our weekends in utes, vans and campers. We got sick of 12V gear that gave up a few trips in, so we started making our own and running it in our own rigs first.

Not sure what you need? Flick us an email and one of us will sort you out. No sales script, just straight answers.

  • We run it ourselves

    Every bit of gear goes in our own rigs before it goes on the site.

  • Out the door today

    Order by 3pm AEST and it leaves Geelong the same day.

  • Sorted here if it plays up

    1 year Aussie warranty, handled by us, not a call centre.