Update: May 28th 2020
Received the Durite 472. It's larger than I thought but usuable. The liquid in the thermometer is red as is the surround so it's difficult to read the temp.Spoke to a guy at tech 01255 555200 for over half an hour ~ details should be appended ~ Need to make a nice box for it.
Update: May 23rd 2020
I broke the glass containers on both the hydrometers mentioned below and have bought a premium claibrated (0.002) sg @ some £54. A Durite model 472 It has a range of 1.22 to 1.3 so the scale will also be larger than the previous buys.
I have ended up buying two hydrometers. I first called Plymouth Battery Centre who informed me they had a glass model at £19 which I thought was a bit expensive so when I went to town I thought I'd look around before I took the mile or more walk to Prince Rock.
The Toolshed could get a glass model for £5 and the car shop next door had the same model for £2.99, which I bought. When I went to the Plymouth Battery Centre to buy some red and black covered multi-core cable I decided to buy the hydrometer they had anyway, which cost £14.50 eventually.
The better model from Plymouth battery Centre is the one on the left, although you cannot see the coloured scale. It is supplied by Gordon Equipments under the name DURITE model 0-070-00 ; range 1.15 to 1.40; accuracy 0.01. All parts are individually replaceable.
Concerns regarding the cheapo
- The float diameter is much smaller than the container diameter so the readings are at an angle.
- On the side of the container the float rests, the surface tension of the acid draws the liquid further up the side of both, giving a distorted view.
- The scale is on the small side so not so easy to read.
- And of course there's the idea that the calibration is off.
Managed to retrieve an old extension lead to run a 4" angle grinder, but at 710watts the inverter cut out after 1/10th second so I'm researching inverters that will do 1Kw
Looks like a Victron may be good especially as maybe 'Made in India'
http://www.windandsun.co.uk/products/Inverters/Victron-Inverters/Victron-Inverters :: windandsun.co.uk/ . . . /Victron-Inverters
VP-12/1200 Victron Phoenix 1200VA, 12V in, UK Outlet £334.32+VAT=/=£400
Const 1000W Peak 2400W
https://calstock.org.uk/media/blogs/elf/docs/vp12~1200.pdf vp12~1200 :: Manual and Data
https://calstock.org.uk/media/blogs/elf/docs/vp12~1200_dim.pdf ::vp12~1200 : Dimensions
Unit 349-354, Faraday Mill Trade Park | 8:00am-6:00pm
https://www.plymouthbattery.co.uk/ 01752 227637
**Some notes on this business.**
I have spoken to two people mostly, Richard and Marc. My first contact with Richard seemed ok and they agreed to test the capacity of a couple of batteries. When I took two in I met with Mark who explained they would test the batteries by discharging and then charging and discharging to see what the capacity is after a full charge. This was late on a Friday. On Sunday I had a missed call to say the batteries were badly sulfated and what did I want to do about it. When I called back I spoke to Richard who didn't have exact details. I was bit put out by this and even more so once I understood he is the son of the guy I used to deal with when it was a small unit some 30 years ago.