Apollo Smart (when purchased with Harlequin tank)

Apollo Smart (when purchased with Harlequin tank)

Product Description

Apollo Smart - Purchased with Harlequin/Diamond Tank

Apollo Smart Oil Tank Energy Monitor: the world’s first home oil monitor. Designed specifically for domestic oil heating installations (bunded and single skin tanks). Not suitable for underground tanks. NEW - Now with built in FUEL THEFT ALARM.

NB: Delivery approx 7 working days (Royal Mail Recorded Delivery)

Unlike traditional oil tank contents gauges, Apollo Smart allows you to monitor the volume of useable fuel remaining inside your tank, heating oil consumption, energy costs, air temperature and carbon emissions from the warmth, comfort and convenience of your home. Measuring key indicators of system efficiency helps you to identify interventions to reduce heating oil consumption, energy costs and carbon emissions.

Apollo Smart is a two-piece system, which comprises a tank top transmitter unit and a receiver unit. The wireless transmitter unit is suitable for use with almost any oil tank up to 3 metres tall (19000 litres max.), irrespective of manufacturer or material of construction. The receiver unit incorporates a premium quality LCD display and simply plugs into a standard electrical socket, with no wiring or electrical work required.

How it works
The Apollo Smart transmitter unit can be fitted to almost any oil tank, with no specialist tools or training required. The unit is simply affixed to the tank via the pre-drilled 32mm diameter aperture, found on most tanks produced in the UK and Ireland since the late 1990s, and retained with 2 self-tappers (supplied). The transmitter unit monitors the level of fuel inside the tank, measuring fuel levels and consumption.

Now also with the new added Alarm enhancement, should the transmitter detect a sudden drop of fuel inside the tank outside normal consumption conditions, it will automatically alert the Smart receiver unit to the event which will then sound an audible alert to warn the customer.

The Smart receiver unit also incorporates a unique days to empty facility, which shows you how many days supply of fuel remains. The risk of running out of oil is further reduced by an inbuilt low level alert with audible warning alarm and again new for the 2013/2014 heating season the unit will also come complete with an audible inbuilt fuel theft alarm.

This data is transmitted to the receiver unit, which can be positioned up to 150 metres from the receiver unit, where it is analysed and displayed on an intuitive and easy to read display. 

For cleaner safer refueling, the Apollo Smart transmitter unit incorporates an inbuilt level display, allowing fuel delivery personnel to monitor tank levels before, during and after delivery.

Data Outputs

  • Apollo Smart will allow you to monitor the following data on demand:
  • Volume of useable heating oil remaining – displayed in litres and as a percentage of total tank capacity
  • Room Temperature, displayed in degrees Celsius
  • Fuel level – displayed via an easy to read bar graph 
  • Additionally, the following information is continuously monitored, recorded and can be viewed on the receiver unit:
  • Heating oil consumption in litres 
  • Estimated heating oil costs in £ Sterling (STG) or Euro (EUR)
  • Carbon emissions in kgCO2

Fuel consumption, heating oil costs and carbon emissions data is produced on the following basis:

  • Average per day
  • Average per week
  • Last 7 days estimated total
  • Last 30 days estimated total
  • Last 365 days estimated total 


  • Suitable for almost any single skin or bunded oil tank up to 3 metres tall
  • Quick and easy to install with no specialist tools or skills required
  • No wiring or electrical work required
  • Displays key indicators of total system efficiency at the press of a button
  • Determines volume of useable fuel in your tank in both litres and as a percentage of total useable capacity
  • Unique days to empty function, low level alert and audible low level warning
  • Integral USB connectivity allows data to be uploaded to almost any PC
  • Intuitive and easy to use
  • Contemporary, modern and appealing product design

Every Apollo Smart system is supplied complete with:

  • Tank transmitter unit complete with integral level display, long life (up to 10 years) lithium battery, neoprene gasket and 2 self tappers (5 inches tall from screw holes to top)
  • Receiver unit incorporating LCD display with combined 1.5m USB / power cable
  • 230v AC mains adaptor
  • Product instructions
  • On tank alarm warning sticker 

Apollo Smart installation videos are now - Please see "Video" tab below

Important Information
Please note the Apollo Smart is not Weights & Measures Approved and is unsuitable for retail sale of fuel

Optional Extra:

  • Multi adaptor ensures compatibility with most steel tanks

Battery - Widely available Lithium 3V-CR2430

Product Code: Apollo Smart

£89.00 £85.00 ex VAT
(£102.00 inc VAT)
Delivery Options
  • FREE STANDARD Delivery for HARLEQUIN Tanks - Via articulated lorry, customer to off-load (Postcode exclusions apply to Highlands & Islands)
  • FREE TAIL LIFT Delivery (for most HARLEQUIN tanks under 2500 litres) - Lowers tank to ground level to assist in off-loading, Excludes Scotland, Highlands and Islands

Certain postcodes in Wales, Scotland, highlands and Islands may have additional charges, please click here to check your postcode

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Returns Information

Customers may return items within 14 calendar days (as per our Terms & Conditions) - refer to 4.6 & 4.7. **

Please be aware that returning a tank can be complicated and expensive so please check that you are ordering the correct item (we suggest checking the dimensions very carefully).

Delivery Information


The delivery of a tank can be confusing as each manufacturer offers a slightly different service and lead time. Please refer to our Delivery Information page.  Standard tank deliveries are "kerbside".


Most accessories will be delivered within 1-3 working days. If you require them quicker, we can on occasions offer a next day service (please contact us to discuss). If the item(s) are out of stock we will advise you of the expected lead time and you will of course have the opportunity to cancel with a full refund.


Customer Reviews

"Does everything it says
And easy to fit"
Feefo Rating 5
"Already received prior to tank delivery"
Feefo Rating 4

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