Spare Oil Watchman/niveau Battery/powertube

It does the job it's meant to do, but I'd advise keeping the old powertube because it's merely a copper tube containing AAA batteries. The copper cap can be removed from the old tube, in the way described by several other reviewers, and the old one can then be kept as a spare.

Could be the sensor or the battery no way of knowing. However it was what I ordered

This piece of kit is a rip off as described by many others. It is a simple piece of copper tube with four batteries sealed in sideThe cost of this to the supplier can only be a couple of pounds but yet it costs approx. £35 to get it delivered.The supplier has got impractical people like myself by the proverbials !!There is a procedure whereby you can unseal the tube and replace the batteries yourself for just the cost of the batteries using the existing tube but you need to be experienced with the appropriate tools . Not easy for people like myself.If the original tube could be supplied with a "screw off" cap this would be the ideal solution but sadly would reduce the profits for Sensor Systems!.

it is a very expensive battery. it took some time to arrive and initially didn't work properly - the monitor indicating low battery power. it is now working correctly.i wouldn't buy another battery but instead buy a brand new unit which costs not a great deal more and would run on conventional batteries.

his item is expensive for what it is, a tube with batteries. I bought it because I was concerned that I might mess up a battery change with the original tube. Now I can go ahead and replace the batteries in the old tube.

These things are very temperamental. This one would not work on my oil tank so I tried it on my mum's tank and it worked. She has the same tank as I do. Cannot explain why these things don't work sometimes. Luckily I wasn't too angry as my money was not wasted as my mother can use it. Not everyone has a mother with another matching oil tank though. Try it but you are taking a chance!!!

Worked well for a short while then threw up "battery low" message. Reconnecting seems to have cured the problem.

Very pleased with this product. I was a little concerned as this is the first time that I have had to replace this part and couldn't find any instructions. I needn't have worried as it was self explanatory once I had the cover taken off. Thank you.