Best Watchman Sonic Tank Monitor Deals Online in the UK (25 Deals Found)

Last Updated - 14/09/2026 Sort By:

Best Choice
Sonic Watchman

New
Watchman Sonic Oil Level Monitor
With the Watchman Sonic Oil Tank Gauge you can monitor your oil tank contents 'at a glance' from your home, no need to w

£93.50
Watchman

New
Watchman Sonic Advanced Oil Tank Level Gauge, with Audible Alarm - Oil Tank Level Monitor and Tank Level Sensor
ONE MODEL FITS ALL - no need for different device for different kinds or materials. This device can be fitted at any kin

£101.09
New
Kingspan watchman Sonic Advanced Oil Tank Monitor
Kingspan Watchman for oil boilers

£83.90
Kingspan

New
Kingspan Watchman Sonic Advanced Oil Level Monitor
Watchman Gauge

£91.20
New
Watchman Sonic Oil Level Monitor, Green Older Style Watchman Oil Tank Gauge
The Watchman Sonic Oil Level Monitor is a green older style oil tank gauge from the brand Sonic Watchman, originating fr

£104.70
PlumbEZ

New
Watchman SENSiT Smart WiFi Oil Tank Monitor & Gauge Kit, App Connected Fuel Tank Level Sensor for Heating Oil, Kerosene,
Smart oil tank monitoring from anywhere via the Kingspan Connect app, so you can check fuel levels remotely and receive

£139.99
Best Value
PlumbEZ

New
Watchman SENSiT Smart WiFi Oil Tank Monitor & Gauge Kit, App Connected Fuel Tank Level Sensor for Heating Oil, Kerosene,
Smart oil tank monitoring from anywhere via the Kingspan Connect app, so you can check fuel levels remotely and receive

£154.99 £159.99
New
Watchman Sonic Oil Level Monitor, Green Older Style Watchman Oil Tank Gauge
The market leading Watchman Sonic consists of a transmitter and receiver unit. Suitable for steel or plastic tanks. Aver

£125.99
AUNMAS

New
AUNMAS Water Level Sensor Transmitter, Ultrasonic Water Tank Liquid Watchman Sonic Oil Level Monitor Cistern Water Level
Comprehensive Monitoring: This advanced Water Level Sensor accurately monitors tank liquid depth and displays it on a 10

£55.44
New
Watchman Sonic Oil Level Monitor and Oil Tank Lock Bundle
Watchman Sonic Oil Level Monitor and Oil Tank Lock Bundle

£169.73
HPW

New
Watchman SENSiT Smart Oil Tank Monitor/Gauge
Quick and easy to install

£181.65
HELVES

New
HELVES Ultrasonic Water Tank Liquid, Watchman Oil Level Monitor Cistern Water Level Monitor Depth Level Meter Sensor wit
It can keep min/max records of tank liquid level

£70.08
New
Watchman Sonic Advanced Oil Tank Monitor - Ultrasonic Oil Level Measuring Device
The Watchman Sonic Advanced Oil Tank Monitor is a cutting-edge ultrasonic oil level measuring device designed for heatin

£78.70
TIEOAXFT

New
Ultrasonic Water Level Monitor, Accurate Sensor for Tanks, Wells, and Reservoirs (485)(Switching value)
Precise Water Level Measurement Offers reliable monitoring of water levels in various applications, including tanks, wel

£40.92
New
Watchman Sonic Advanced Oil Tank Monitor - Ultrasonic Oil Level Measuring Device
Watchman Sonic Advanced – Electronic Heating Oil Tank Level Monitor. It’s quick to install, maintenance-free, and gives

£93.00
TIEOAXFT

New
Ultrasonic Water Level Monitor, Liquid Sensor for Tanks, Boilers, and More
High detection accuracy This Ultrasonic Liquid Level Sensor accurately detects liquid levels in both metallic and non me

£43.70
New
VARTA CR2430 Lithium Battery 3V 6430 x 1 Watchman Sonic Oil Tank Monitor NEW
This battery is suitable for the Watchman Sonic Oil Tank Monitor. Capacity 290mAh.

£3.95
New
Watchman Sonic Sensit Oil Tank Monitor Electronic Heating Gauge With Phone App
A USB receiver that lets you transform your Watchman SENSiT ready oil tank, into a smart WiFi tank level monitor. The SE

£144.99
Used
Watchman Advanced Sonic Oil Tank Level monitor unit ( RECEIVER PLUG ONLY)
Watchman Advanced Sonic oil level monitor. ( Only the receiver plug ) Good working condition.

£33.95
Used
Watchman Sonic Oil Tank Level monitor unit ( RECEIVER PLUG ONLY)
Watchman Sonic oil level monitor. ( Only the receiver plug ) Good working condition.

£33.95
Refurbished
Oil Watchman Sonic Alarm Oil Tank Level Monitor ( Transmitter Only ) New Battery
Watchman sonic alarm oil tank Level monitor. ( TRANSMITTER ONLY ). This is the part fitted to the tank. New battery fitt

£42.25
Refurbished
Oil Watchman Sonic Oil Tank Level Monitor ( Transmitter Only ) New Battery
Watchman sonic oil tank Level monitor. ( TRANSMITTER ONLY ). This is the part fitted to the tank. New battery fitted and

£42.25
New
VARTA CR2430 Lithium Battery 3v 6430 x 1 for Watchman Sonic Oil Tank Monitor
1 x Varta CR2430 3v Lithium Battery (1 Battery). Suitable for use in the Watchman Sonic Oil Tank Monitor. Best Before Us

£4.66
New
Watchman Sonic Advanced Oil Level Monitor – Ultrasonic Oil Tank Measuring Device
The Watchman Sonic Advanced Oil Level Monitor is a cutting-edge ultrasonic oil tank measuring device designed by Monitor

£120.30
New
Sonic Advanced Oil Tank Level Gauge with Audible Alarm Oil Tank Level Monitor
ONE MODEL FITS ALL - no need for different device for different kinds or materials. This device can be fitted at any kin

£183.51

25 Watchman Sonic Tank Monitor deals are available from: Amazon, eBay stores, starting from £3.95.
The biggest discount we found is 3% on Watchman SENSiT Smart WiFi Oil Tank Monitor & Gauge Kit, App Connected Fuel Tank Level Sensor for Heating Oil, Kerosene, Diesel & Water, Alexa Compatible Watchman Sensit - With Local Display Plug at Amazon.
The lowest price we found is £3.95 while the highest is £183.51.
Prices for the best Watchman Sonic Tank Monitor deals average at £89.54.
Last updated on September 14, 2026.
We scanned these quality online stores and more to deliver you with the best offers online available for Watchman Sonic Tank Monitor.