Watchman Sonic

£109.87 £91.56


Lead Time
2-3 working days
Delivery From
£10.00 + VAT
Exclusions apply - Click here for more details

UK Delivery Charges - Important Information

Our standard UK Mainland delivery charges have been automatically added to your shopping basket. As our products are supplied from a number of different locations, delivery times can vary, please read the product descriptions for more details. If we are unable to deliver your order within the timeframe specified in the product description, we will contact you, as soon as possible to advise of a revised delivery date.

Need your order urgently? We may be able to assist and offer an express delivery service, call our sales team on 01777 858009

Buying in bulk? Call our sales team on 01777 858009

Delivery to any of the following areas may incur additional delivery charges

Channel Islands, Isle of Man, Isle Of Wight, Anglesey, Isles of Scilly, Western Isles, Orkney Islands, Shetland Islands, Northern Ireland & Republic of Ireland, Scottish Highlands and Offshore Islands and also areas north of the Glasgow/Edinburgh line including the following postcode areas:

AB, DD, DG, EH, FK, G, HS, IV, KA, KW, KY, ML, PA20-40, PA60-78, PH1-26, PH30-44, PH49-50, TD, ZE

If your delivery location or postcode is listed above, please call our sales team on 01777 858009 for more details.


Electronic remote oil monitor reading gauge

The watchman sonic oil monitor, an electronic oil level sensor remotely monitors the level of oil in the tank. 

A green transmitter is fitted to the top of the oil tank and an ultra sonic level measurement is transmitted to a level sensor receiver. This information is accessed via the receiver which is plugged into an electric wall socket within the home. 

A watchman oil monitor will continually monitor the oil level and when it is below 10 per cent, the fuel dispensing pump symbol appears on the receiver as a reminder to order more oil.


Display: Bar graph level display, 10% tank height per bar. Early warning indication (flashing tank fill) at a predetermined height above tank bottom.

Max communication distance: 200m in normal ‘line of sight’ conditions. The effective range of this product can be influenced by external sources that may reduce the range of the transmitter or sensitivity of the receiver.

Power supply: Receiver: 150-250V, 50-60HZ. Transmitter: 3-voltlithium cell

Battery life: 3 years (estimated life)

Wireless com: 433 mHz. FM transmission. EN 300-220, FCC part 15.

Dimensions: Receiver: 50 x 55 x 35mm (not including aerial). Transmitter: 70 x 93mm.

Max and min operating temp (transmitter): Operating temp. Range -10° to 60°C. Operating humidity: 0-100%. Sealed airtight unit made from PP3317 UV stabilized.

Hole size for tank fitting: 32mm. 2″ BSP external thread adaptor


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