Apollo Ultrasonic Level Sensor Standard Operating Voltage (Range): 150-250 V/AC 1S

Working perfectly and great to know how much oil is in tank

My old sender gave up the ghost after about 15 years . I was relieved that the new sender and receiver was the same basic design as the old one and following the step by step instructions and fitting the new one was a doddle. An excellent and accurate product.

This fitted to our existing bunded tank which has the require adapter under the lockable lid. The sender unit JUST fits inbetween the outer protective cover and the actual top of the tank, probably by design than by sheer luck. The main gripe with fitting this was that one screw ended up being behind the sender unit, which would be ok however with it being inside the bunded cover the screw was not visible, and if I dropped it the screw/sender would have ended up inside the protective skin of the tank!! So I proceeded carefully. Once in, however, the unit has been a breeze and has given us 2-3 months of monitoring. We now have a good idea of how much oil we are using and know when to get an order in to ensure we dont run out. When setting up the unit make a good measure of the tank height (not the capacity!) using a rigid ruler or similar. Set the DIP switches on the unit and off you go. The sender unit doesn't update the reading instantly, it sends the reading every hour or so (presumably to ensure a long battery life) so dont worry if the unit doesnt reflect the level straight away, leave it for a few hours and the readings should update correctly. This is the same case when you get a fuel delivery.....the reading wont update straight away (unless your delivery happens to be just before a new update on the sender!). The receiver just plugs into a standard 13A socket and works well over a long distance. Our tank is in an outbuilding over 15m away and the unit receives fine even via a 2ft thick stone wall. All in all a good purchase. Just take your time on installation and follow the instructions. A+

Easy to install and accurate

Had one of these for 21 years then it stopped working changed the battery but didn’t work Decided to buy the same - really simple to set up and install - hope this one lasts 21 years Can’t recommend enough

Quality product easy to install and works well over a 60mtr range in my case

Bought to replace broken original. Arrived within 24hrs of order and installed in 15 mins. Very happy!

This unit was easy to fit to my oil tank. I paired it with the receiver unit and then installed it on the tank. You have to measure the depth of the tank and set up some dip switches on the receiver unit and if you do this correctly then the Apollo seems to be fairly accurate. I hope it will last a few years but only time will tell.