navitron
 
Renewable Energy and Sustainability Forum
Welcome, Guest. Please login or register.

Login with username, password and session length
News: Anyone wishing to register as a new member on the forum is strongly recommended to use a "proper" email address. Following continuous spam/hack attempts on the forum, "disposable" email addresses like Gmail, Yahoo and Hotmail tend to be viewed with suspicion, and the application rejected if there is any doubt whatsoever
 
Recent Articles: Navitron Partners With Solax to Help Create A More Sustainable Future | Navitron Calls for Increased Carbon Footprint Reduction In Light of Earth Overshoot Day | A plea from The David School - Issue 18
   Home   Help Search Login Register  
Pages: [1]   Go Down
  Print  
Author Topic: Will any battery hydrometer do the job?  (Read 2322 times)
mr_magicfingers
Hero Member
*****
Offline Offline

Posts: 855



« on: October 05, 2009, 07:58:55 PM »

Just been looking at hydrometers and finding prices from 3 to 30 or so. Just wondered if there was anything particular about one that you should be aware of. I was going to pick one up to add to the battery testing gear. EG

http://cgi.ebay.co.uk/Silverline-Battery-Hydrometer-150Mm_W0QQitemZ180414155536QQcmdZViewItemQQptZUK_Hand_Tools_Equipment?hash=item2a01858b10&_trksid=p3286.c0.m14

http://cgi.ebay.co.uk/BATTERY-HYDROMETER_W0QQitemZ270349374800QQcmdZViewItemQQptZUK_Hand_Tools_Equipment?hash=item3ef2141550&_trksid=p3286.c0.m14

seems like a cheap way to do some extra testing.

Cheers,

Justin.
Logged

Solar PV: 6kw (24 x REC 250w), Sunny Boy 3600TL-21, roof facing 178 at 40 slope.
300l Thermal Store, 2 x 3kw immersions via Immersun + Dunsley Yorkshire WBS
Woodwarm Double sided 6kw WBS
7 acres of old woodland I'm slowly bringing back into order.
johnrae
Hero Member
*****
Offline Offline

Posts: 764


« Reply #1 on: October 05, 2009, 09:29:46 PM »

Don't know who put the Silverline one together but the float is installed upside down !!  The Draper one has been squeezed into a box resultingin a bent tube.  Bent tubes are a bl**dy nuisance so only buy one with a straight tube.

A hydrometer is THE way to test lead acid battery state of charge.  The electrolyte SG is a true indication of a batteries state of charge (presuming no-one has been mucking about by adding acid to kid themseleves on.  No doubt others will differ but it's what's sufficed since they were invented.

A hydrometer serves no purpose if your batteries are alkaline based since the SG of the lectrolyte gives no indication of state of charge.

jack
Logged
mr_magicfingers
Hero Member
*****
Offline Offline

Posts: 855



« Reply #2 on: October 05, 2009, 09:40:17 PM »

Interestingly EVERYONE who's selling the silverline one has the same photo. I'm guessing that you can take off the nozzle and put it the other way up. Thanks for pointing that out.

At 3, it seems like a good idea, I shall pick one up.

J.
Logged

Solar PV: 6kw (24 x REC 250w), Sunny Boy 3600TL-21, roof facing 178 at 40 slope.
300l Thermal Store, 2 x 3kw immersions via Immersun + Dunsley Yorkshire WBS
Woodwarm Double sided 6kw WBS
7 acres of old woodland I'm slowly bringing back into order.
camillitech
Hero Member
*****
Offline Offline

Posts: 5432



WWW
« Reply #3 on: October 15, 2009, 06:26:11 AM »

Hi mr M,

I use a 30 one at home



which has a much larger volume so is more accurate, however at work where I monitor several large banks we use the 3 ones, all of which give different readings  Roll Eyes  however this is not such an issue so long as you keep using the same one and keep a record, pretty soon you will build up an intimate knowledge of your own battery bank and will be able to tell at a glance when something is amiss.

Good luck, Paul
Logged

http://lifeattheendoftheroad.wordpress.com/

'Off grid' since 1985,  Proven 2.5kW, Proven 6kW direct heating, SMA SI6.OH, 800ah Rolls, 8kW PV ,4xTS45, Lister HR2 12kW, , Powerspout pelton, Stream Engine turgo, 60 x Navitron toobs and a 1500lt store. Outback VFX3048 and 950ah forklifts for backup,
Pages: [1]   Go Up
  Print  
 
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.20 | SMF © 2013, Simple Machines
SMFAds for Free Forums
Simple Audio Video Embedder
Valid XHTML 1.0! Valid CSS!