Temperature Correcting Battery Hydrometer

I bought this hydrometer to replace one I dropped and broke. I have two others but with the amount of batteries I maintain, one can never have too many hydrometers laying around.

I have used hydrometers for years maintaining deep cycle batteries and have learned the ones with the pointer are a joke. You can test the same cell three different times and get three different readings. If they show anything other that 1.260 (100% charged) they are inaccurate. I simply cannot trust my batteries to a inaccurate tester.

You really MUST use a hydrometer with a floating cylinder like this one. Pointers, floating balls, disks, etc. are just not accurate enough to bet your expensive batteries on!

Now on to this little jewel:

You will not find a hydrometer that is this accurate, in this price range anywhere. I compared the readings from this tool with readings from my much, much more expensive Freas hydrometer and the readings were so close you could not read a difference without a magnifying glass.

The other big feature is this too has a built in thermometer. You MUST know the electrolyte temperature in order to get a valid reading! Instead of simply showing the degrees, this meter has a scale on it telling you how many "points" to add or subtract to your reading. Much more user friendly than using a separate thermometer to read temp.

The thermometer on this unit is dead on.

I am not one who usually writes reviews, but for this tool I had to. It is a great accurate meter for a great price. Not sure where you could go wrong unless you dropped it. In that case order a spare. They are cheap enough!

I will be ordering a couple more to have around and a few to give as gifts.

Bought a plastic battery tester at the local auto parts store and it sucked. I took three readings, back to back, of the same cell and got three different results. Their is a reason glass hydrometers are the standard for commercial battery testing, they work. In Aviation its all we use, and in a pinch I though I could get away with the plastic CHEAPO. This works awesome. Gives great, repeatable, readings of the state of charge of the battery. Price was great, shipping was FAST! I would buy this again in a heartbeat!

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Difficult to use, thermometer does not appear at all accurate. Also purchased the standard model hydrometer. It worked much better.

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The manufacturer should have placed a pull string under the bulb. Trying to get the foam-lined bulb out can cause it to break.

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A glass hydrometer in a glass tube. 'Nuff said. I use this hydrometer to maintain the battery bank in my motorhome, as well as the batteries in the rest of my vehicles. The hydrometer has already identified a bad cell in a vehicle that was cranking over slowly. This saved me from a lot of frustration, and a possible total battery failure while traveling.

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