---
product_id: 48243199
title: "Watchman Sonic Advanced Oil Tank Level Gauge, with Audible Alarm - Oil Tank Level Monitor and Tank Level Sensor"
brand: "watchman"
price: "€ 204.69"
currency: EUR
in_stock: true
reviews_count: 8
category: "Watchman"
url: https://www.desertcart.pt/products/48243199-watchman-sonic-advanced-oil-tank-level-gauge-with-audible-alarm
store_origin: PT
region: Portugal
---

# 200m wireless range Audible alarm alert Universal tank compatibility Watchman Sonic Advanced Oil Tank Level Gauge, with Audible Alarm - Oil Tank Level Monitor and Tank Level Sensor

**Brand:** watchman
**Price:** € 204.69
**Availability:** ✅ In Stock

## Summary

> 🔔 Never Run Dry, Always Stay Fly!

## Quick Answers

- **What is this?** Watchman Sonic Advanced Oil Tank Level Gauge, with Audible Alarm - Oil Tank Level Monitor and Tank Level Sensor by watchman
- **How much does it cost?** € 204.69 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/48243199-watchman-sonic-advanced-oil-tank-level-gauge-with-audible-alarm)

## Best For

- watchman enthusiasts

## Why This Product

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

## Key Features

- • **Effortless Setup:** Quick, tool-free installation with clear instructions—get protected in minutes, not hours.
- • **Long-Range Monitoring:** 200-meter transmitter-to-receiver range keeps you informed from afar, perfect for busy pros.
- • **Peace of Mind Guarantee:** 12-month replacement warranty ensures your investment is safe and reliable.
- • **Universal Fit, Zero Hassle:** One model fits all oil tanks—no more guessing or multiple purchases.
- • **Stay Ahead with Instant Alerts:** Audible alarm triggers immediately on sudden oil level drops—never get caught off guard.

## Overview

The Watchman Sonic Advanced Oil Tank Level Gauge is a robust, weather-resistant sensor with a 200-meter wireless range and an audible alarm that alerts you instantly to sudden oil level drops. Designed for universal compatibility, it fits any oil tank type and offers quick installation backed by a 12-month replacement guarantee—perfect for professionals who demand reliable, hassle-free monitoring.

## Description

Sonic alarm

Review: LIGHT WEIGHT ,ROBUST ,EASY TO FOLLOW INSTRUCTIONS. - SEEMS COMPLICATED BUT IT REALLY IS EASY,MEASURE THE HEIGHT OF THE TANK THEN PUSH THE RELEVANT PINS ON THE RECEIVER ACCORDING TO THE GIVEN CHART ,PLUG IN AND HOLD THE RECEIVER NEXT TO THE OTHER PART TILL IT BEEPS THEN GO SCREW THE OTHER PART ONTO THE TANK .ALL DONE . THESE LAST SEVERAL YEARS AND ARE ROBUST ENOUGH TO WITHSTAND THE WEATHER.
Review: Easy to fit , working as expected. - As required , quick delivery.

## Features

- ONE MODEL FITS ALL - no need for different device for different kinds or materials. This device can be fitted at any kind of oil tanks!
- ALARM ALERT - No need to worry on the loss of your oil tank. The alarm will just blare when there's a sudden drop in level!
- 200 METER TRANSMITTER TO RECEIVER GAUGE - Yes, it can alert you from that far. You don't want to caught off-guard when that oil level suddenly starts on dropping!
- QUICK AND EASY INSTALLATION - With easy to follow instructions, you'll never get a complicated time on getting them up and running!
- 12 MONTHS REPLACEMENT GUARANTEE - If things go wrong within 12 months, just let us know, and we will replace it for you!

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B004MSBSSE |
| Batteries | 1 Lithium Ion batteries required. |
| Batteries Required? | No |
| Batteries included? | No |
| Battery Cell Type | Lithium Ion |
| Best Sellers Rank | 9,603 in DIY & Tools ( See Top 100 in DIY & Tools ) 11 in Home Alarm Systems |
| Colour | Colour May Vary |
| Customer Reviews | 4.4 4.4 out of 5 stars (216) |
| Date First Available | 16 Sept. 2010 |
| Delivery information | We cannot deliver certain products outside mainland UK ( Details ). We will only be able to confirm if this product can be delivered to your chosen address when you enter your delivery address at checkout. |
| Included Components | Sonic Alarm |
| Item Package Quantity | 1 |
| Item Weight | 350 g |
| Item model number | 0 |
| Manufacturer | Watchman |
| Part Number | WASONICALARM |
| Product Dimensions | 50.8 x 15.24 x 15.24 cm; 350 g |

## Images

![Watchman Sonic Advanced Oil Tank Level Gauge, with Audible Alarm - Oil Tank Level Monitor and Tank Level Sensor - Image 1](https://m.media-amazon.com/images/I/41KgrE+dDdL.jpg)

## Questions & Answers

**Q: What does a bar indicate exactly. On a 1000 litre tank, I know that 1 bar is 100 litre. But is that at least 100 l to 199 l or only 100 or less.**
A: For safety's sake I take it as 100 or less. I would prefer not to run out for the sake of 100 litres of fuel. Alternatively use a stick to dip the tank and mark the stick as each bar comes up on the watchman. After a few marks you'll get a good idea as to the amount left.

**Q: after installation,showed full up, though tank was only half full of oil. what is the [problem and solution?**
A: I'd guess you may not have calibrated the sensor for the tank size / shape correctly. I recall there was a process to set this. Otherwise worth checking nothing (eg bit of plastic inside the tank) is between the sensor and the oil surface as I think it uses ultrasound waves like a radar to bounce off the surface of the oil to work out how full it is.

**Q: How long does the battery last?**
A: Like all batteries the life tends to vary. The installation instructions only state they have a very long service life …  but they will eventually need replacing. I got a new Watchman when I replaced my old tank over two years ago and it is still going with the same VARTA CR2430 Disc type battery. It is not difficult to replace but should not be attempted if the Watchman is still in the one year warranty period - if it appears to need replacing in this time then contact suppliers, as opening the battery unit will then invalidate the warranty.  Not something that you should be worried about if considering the purchase of a Watchman unit which has given me excellent service over the years.

**Q: will the watchman sudden level drop alarm sound if someone removes the sensor from the tank**
A: I don't know the answer but imagine it would just cease to work. I have a double skinned plastic tank which has the Watchman inside the outer skin accessible through a lockable lid. This keeps the sensor out of sight and locked away, although I don't think it would take too much to remove the lock by force. We do have a dog which is probably a better deterrent for a would be thief. Prospective owners should be aware that if the alarm does sound it is not likely to wake anyone up as it is not particularly loud (well, not for me anyway). Operation wise I have had no problems with this product over 22 years. but it is necessary to closely follow the instructions provided when fitting.

## Customer Reviews

### ⭐⭐⭐⭐⭐ LIGHT WEIGHT ,ROBUST ,EASY TO FOLLOW INSTRUCTIONS.
*by L***. on 4 November 2025*

SEEMS COMPLICATED BUT IT REALLY IS EASY,MEASURE THE HEIGHT OF THE TANK THEN PUSH THE RELEVANT PINS ON THE RECEIVER ACCORDING TO THE GIVEN CHART ,PLUG IN AND HOLD THE RECEIVER NEXT TO THE OTHER PART TILL IT BEEPS THEN GO SCREW THE OTHER PART ONTO THE TANK .ALL DONE . THESE LAST SEVERAL YEARS AND ARE ROBUST ENOUGH TO WITHSTAND THE WEATHER.

### ⭐⭐⭐⭐⭐ Easy to fit , working as expected.
*by R***E on 13 October 2025*

As required , quick delivery.

### ⭐⭐⭐⭐⭐ Great product
*by T***Y on 8 December 2025*

Great second 1 - I bought it for it parents

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*Product available on Desertcart Portugal*
*Store origin: PT*
*Last updated: 2026-02-09*