---
title: UNI-T Cable Tester (UT681C)
date: 2023-07-06 09:00:06
permalink: https://lesterchan.net/blog/2023/07/06/uni-t-cable-tester-ut681c/
author: Lester Chan
categories:
  - Tool
tags:
  - cable tester
  - Lazada
  - UNI-T
---

We have sold out first home and are renovating our new home. Since our new home is an HDB Resale Flat, we have to lay Cat 6 LAN cables around the house. To test whether those cables were working, I decided to get a Cable Tester.

There are many brands of cable testers that are available on Lazada and Shopee. But I ended up buying the [UNI-T Cable Tester (UT681C)](https://meters.uni-trend.com/product/ut681-series/) since I have bought [UNI-T products](https://lesterchan.net/blog/tag/uni-t/) before.

I bought the UNI-T Cable Tester (UT681C) from [Lazada](https://s.lazada.sg/s.bMYx9) for **S$19**. Local shipping within Singapore is an additional S$1.75.

[![UNI-T Cable Tester (UT681C) - Box Front](https://live.staticflickr.com/65535/53023999533_2359d8db72_c.jpg)](https://live.staticflickr.com/65535/53023999533_96683e6d10_o.jpg "UNI-T Cable Tester (UT681C) - Box Front")

There are two models to UT681, UT681C, and UT681L. The only difference is UT681C allows you to test for [BNC cable](https://en.wikipedia.org/wiki/BNC_connector), and it includes an RJ45 to BNC adapter in the package.

[![UNI-T Cable Tester (UT681C) - Box Back](https://live.staticflickr.com/65535/53023683529_0fd8e97c9f_c.jpg)](https://live.staticflickr.com/65535/53023683529_7156e67d4b_o.jpg "UNI-T Cable Tester (UT681C) - Box Back")

[![UNI-T Cable Tester (UT681C) - Box](https://live.staticflickr.com/65535/53022935462_2568e729b7_c.jpg)](https://live.staticflickr.com/65535/53022935462_100a13212b_o.jpg "UNI-T Cable Tester (UT681C) - Box")

The packaging contents also include the 9V battery.

[![UNI-T Cable Tester (UT681C) - Box Contents](https://live.staticflickr.com/65535/53022935467_fb84e0b1c4_c.jpg)](https://live.staticflickr.com/65535/53022935467_95284ba364_o.jpg "UNI-T Cable Tester (UT681C) - Box Contents")

[![UNI-T Cable Tester (UT681C) - Instructions](https://live.staticflickr.com/65535/53023510731_82a4721bc7_c.jpg)](https://live.staticflickr.com/65535/53023510731_a96e8a73f3_o.jpg "UNI-T Cable Tester (UT681C) - Instructions")

The RJ45 To BNC Adapter, included in the packaging, is meant to be used on the receiver unit.

[![UNI-T Cable Tester (UT681C) - RJ45 To BNC Adapter](https://live.staticflickr.com/65535/53023510881_5db48cdf10_c.jpg)](https://live.staticflickr.com/65535/53023510881_629555eb78_o.jpg "UNI-T Cable Tester (UT681C) - RJ45 To BNC Adapter")

[![UNI-T Cable Tester (UT681C) - Front](https://live.staticflickr.com/65535/53023904800_c57f4317b2_c.jpg)](https://live.staticflickr.com/65535/53023904800_e7e3680d4b_o.jpg "UNI-T Cable Tester (UT681C) - Front")

A minor annoyance about the UT681C is I would need access to a Philip-head screwdriver to replace the batteries because a small screw secures the battery cover.

[![UNI-T Cable Tester (UT681C) - Back](https://live.staticflickr.com/65535/53023999433_615136fa68_c.jpg)](https://live.staticflickr.com/65535/53023999433_df7c4d9cb6_o.jpg "UNI-T Cable Tester (UT681C) - Back")

UT681C allows you to test RJ11 (telephone) and RG45 (LAN) cables.

[![UNI-T Cable Tester (UT681C) - Top](https://live.staticflickr.com/65535/53023683369_f329fcf300_c.jpg)](https://live.staticflickr.com/65535/53023683369_58a9e9d314_o.jpg "UNI-T Cable Tester (UT681C) - Top")

[![UNI-T Cable Tester (UT681C) - Bottom](https://live.staticflickr.com/65535/53023510726_2d8d3291aa_c.jpg)](https://live.staticflickr.com/65535/53023510726_e4fe638d63_o.jpg "UNI-T Cable Tester (UT681C) - Bottom")

The receiver unit can be detached from the transmitter unit.

[![UNI-T Cable Tester (UT681C) - Detached](https://live.staticflickr.com/65535/53023999318_50fbcac700_c.jpg)](https://live.staticflickr.com/65535/53023999318_e144c9a407_o.jpg "UNI-T Cable Tester (UT681C) - Detached")

If the LAN cable works correctly, the status light on the receiver and transmitter will light up simultaneously from one to eight in the same sequence.

[![UNI-T Cable Tester (UT681C) - Testing LAN Cable](https://live.staticflickr.com/65535/53023510706_a77fb248d7_c.jpg)](https://live.staticflickr.com/65535/53023510706_6f1813c3f2_o.jpg "UNI-T Cable Tester (UT681C) - Testing LAN Cable")

[![UNI-T Cable Tester (UT681C)](https://live.staticflickr.com/65535/53022935257_5c33c779cc_c.jpg)](https://live.staticflickr.com/65535/53022935257_104cb1f927_o.jpg "UNI-T Cable Tester (UT681C)")