---
product_id: 48185807
title: "Watchman Sonic Oil Level Monitor"
brand: "sonic watchman"
price: "$389"
currency: NZD
in_stock: true
reviews_count: 8
category: "Sonic Watchman"
url: https://www.desertcart.nz/products/48185807-watchman-sonic-oil-level-monitor
store_origin: NZ
region: New Zealand
---

# Lightweight 360 g design Compact 26.7x21x6.6 cm size Long-lasting CR2430 lithium battery powered Watchman Sonic Oil Level Monitor

**Brand:** sonic watchman
**Price:** $389
**Availability:** ✅ In Stock

## Summary

> 📡 Monitor your oil like a pro—effortless, smart, and always connected!

## Quick Answers

- **What is this?** Watchman Sonic Oil Level Monitor by sonic watchman
- **How much does it cost?** $389 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/48185807-watchman-sonic-oil-level-monitor)

## Best For

- sonic watchman enthusiasts

## Why This Product

- Trusted sonic watchman brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Sleek & Space-Savvy:** Compact and lightweight design fits seamlessly without bulk.
- • **Effortless Installation:** Simple setup means you’re monitoring in minutes, not hours.
- • **Stay Ahead of the Curve:** Avoid last-minute refills and costly downtime with real-time updates.
- • **Instant Oil Level Insight:** Check your oil tank status from the comfort of your home—no more outdoor trips.
- • **Energy Efficient Monitoring:** Powered by a reliable lithium-ion battery for uninterrupted performance.

## Overview

The Kingspan Watchman Sonic Oil Level Monitor offers a compact, battery-powered solution to remotely track your oil tank levels. Designed for easy installation and reliable performance, it eliminates the need for manual checks, saving time and preventing unexpected shortages.

## Description

How it works The Watchman Sonic Oil Tank Gauge consists of a battery operated ultrasonic transmitter installed on your oil tank, which wirelessly transmits a signal for up to 200 metres to the receiver plugged in to a standard 230 volt electrical socket in your home or office so you never run out of oil again! Product Features: Quick and easy to install Suitable for all types of tank, steel or plastic Can transmit up to 200 metres Can measure the tank contents on tanks up to 3 metres inside height Optional audible setting with a buzzing tone, when tank contents run low. Compatible with most fuels including home heating oil (kerosene), diesel and red diesel. Will also fit a 38mm (1.5") female socket found on most steel tanks (please check your tank first) Comes with complete instalation & set up instructions

Review: Too easy to fit. It just works! - Fitting this product was simplicity itself. In fact the job was so easy it actually offered no sense of fulfillment! The sensor worked first time without adjustment. Great value for money and good build quality.
Review: Good quality - It was to replace our old one , so it was easy to install.

## Features

- With the Watchman Sonic Oil Tank Gauge you can monitor your oil tank contents 'at a glance' from your home, no need to walk outside to the tank.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Kingspan Environmental |
| Package Dimensions | 26.7 x 21 x 6.6 cm; 360 g |
| Batteries | 1 CR2430 batteries required. |
| Item model number | 2021-01FU-4-23755 |
| Item Package Quantity | 1 |
| Batteries included? | No |
| Batteries Required? | Yes |
| Battery Cell Type | Lithium Ion |
| Item Weight | 360 g |

## Images

![Watchman Sonic Oil Level Monitor - Image 1](https://m.media-amazon.com/images/I/41KgrE+dDdL.jpg)
![Watchman Sonic Oil Level Monitor - Image 2](https://m.media-amazon.com/images/I/419pVuzfdvL.jpg)
![Watchman Sonic Oil Level Monitor - Image 3](https://m.media-amazon.com/images/I/41kbrf-USTL.jpg)
![Watchman Sonic Oil Level Monitor - Image 4](https://m.media-amazon.com/images/I/41EpZqryTsL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Too easy to fit. It just works!
*by M***T on 27 July 2025*

Fitting this product was simplicity itself. In fact the job was so easy it actually offered no sense of fulfillment! The sensor worked first time without adjustment. Great value for money and good build quality.

### ⭐⭐⭐⭐⭐ Good quality
*by S***T on 7 January 2026*

It was to replace our old one , so it was easy to install.

### ⭐⭐⭐⭐ Battery details and sender radius wide
*by M***S on 7 September 2025*

Quick delivery, exactly as requested. Straight swap with ancient Watchman(old design with copper battery tube and number display). Drill holes and hole diameter same as old, perhaps needs a little more peripheral clearance around sender unit to allow it to rotate while screwing it down onto the base. I had to cut off the small projecting plastic tube from the side to allow rotation. It is a blind end tube which looks redundant if no other parts are connected. Link instructions good, worked first time. Battery is installed already, but I had removed the cover to discover that, voiding the warranty. INSTRUCTIONS SHOUJD MAKE THAT CLEAR! Otherwise works fine

## Frequently Bought Together

- Watchman Sonic Oil Level Monitor
- Duracell 2430 Lithium Coin Batteries 3V (2 pack)- Long life guaranteed - For Use in Key Fobs, Small Remotes, and Fitness Watches - Baby Secure Packaging - 10-Year In-Storage Guarantee
- Energizer CR2430 Lithium Coin Button Cell Battery by Energizer (English Manual) Pack of 2

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**Shop now:** [https://www.desertcart.nz/products/48185807-watchman-sonic-oil-level-monitor](https://www.desertcart.nz/products/48185807-watchman-sonic-oil-level-monitor)

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*Product available on Desertcart New Zealand*
*Store origin: NZ*
*Last updated: 2026-02-12*