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  • E-Z Red SP101 Battery Hydrometer
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E-Z Red SP101 Battery Hydrometer

by E-Z Red

List Price: $146.24
Price: $8.09 & FREE Shipping on orders over $35. Details
You Save: $138.15 (94%)
In Stock.
Ships from and sold by Amazon.com.
  • Easy to read pointer for accuracy
  • Small, compact design for use in hard to reach places
  • Used by battery manufacturers for on-line testing
  • Accurate range of 1.100 - 1.300
  • Unbreakable, E-Z to read, economical, Used by battery manufacturers worldwide
See more product details
21 new from $6.22

Hydrometers

Hydrometers
View our selection of Hydrometers and other Water Quality Test Instruments.

Frequently Bought Together

E-Z Red SP101 Battery Hydrometer + Plews 75-030 Auto Shut Off 2 Quart Capacity Plastic Battery Filler + S&G Tool Aid 14600 Battery Filler Rubber Bulb
Price for all three: $27.46

Buy the selected items together

Product Information

Technical Details
BrandE-Z Red
Item Weight2.4 ounces
Product Dimensions0.5 x 11.4 x 1.3 inches
Item model numberSP101
Discontinued by manufacturerYes
Manufacturer Part NumberSP101
  
Additional Information
ASINB000JFHMRU
Best Sellers Rank #3,050 in Automotive (See top 100)
Shipping Weight3.2 ounces (View shipping rates and policies)
ShippingCurrently, item can be shipped only within the U.S. and to APO/FPO addresses. For APO/FPO shipments, please check with the manufacturer regarding warranty and support issues.
Date First AvailableMay 10, 2006
  
Warranty & Support
Warranty, Parts: Parts
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Product Description

The E-Z Red hydrometer battery tester is made to stand up to tough treatment in service stations and garages. It's designed so that both customer and technician can see the state of the battery acid. This battery tester is economical; your first cost is your only cost. There are no replacement parts, and it has rugged construction and unbeatable quality. There are no difficult float reading to be observed and no temperature tables required.

Customer Reviews

Just buy new ones!
41forFreedom
This tool is great in isolating any bad cells in batteries.
Ronald Hampton
Very easy to use and read.
Rob

Most Helpful Customer Reviews

28 of 28 people found the following review helpful By D. W. Corcoran on January 4, 2007
Verified Purchase
Spend the couple of extra dollars on this. The wide range of movement on the dial makes it easier to see small differences between individual cells in a battery. It dosn't say so on the web-site, but on the box it states that it self compensating for tempurature.
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25 of 26 people found the following review helpful By William J. Doehnert on July 30, 2007
Verified Purchase
Easy to use and quickly shows which battery (and which cells) are good, fair or poor. I have two old golf carts that have questionable batteries, and its always been difficult to determine which battery to replace (other than by age), and when I did this I quickly found the bad battery in each cart, and when replaced greatly improved the charging and charge holding capacity of each GC. For the price, you can't beat it.
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24 of 25 people found the following review helpful By Spitfire on November 24, 2009
Verified Purchase
Short of a laboratory grade instrument, this hydrometer gets the job done. I use it to monitor my solar power system battery bank, so it's important that it gives accurate and repeatable measurements. The built-in temperature compensation is a help - no need to use cumbersome and confusing compensation charts. My only (small) complaint is that you need to be sure that the device is level when filled with battery acid or the reading will be off a bit. If you pay attention to this detail you'll be fine.
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15 of 16 people found the following review helpful By MM on December 18, 2010
Verified Purchase
[edited] Upgrading from 2 to 3 stars.

Overall, this tool will do a good job of letting you know whether any of your cells are bad. If that's all you need to know, then it's is a fine product.

I found, however, that the readings are not consistent enough to provide accurate measurements. Test after test usually ranges plus or minus a graduation (about .025 each).

Previously, I had a complaint that it was difficult to tell if the proper amount of fluid was being used because the meniscus (curvature of the liquid) didn't match with the fill-to line, but was informed that standard practice is to read at the bottom of the meniscus. I may have known that at some point, but certainly forgot about it. So, it turns out I've been using a number of devices incorrectly, but unfortunately with this one the readings are still inconsistent. Regardless, I've found this item to be useful enough that I'll give it a star boost.
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8 of 8 people found the following review helpful By Eric C. Anderson VINE VOICE on January 1, 2014
Verified Purchase
I am legally blind, so reading 48 cells in my backup battery system to see if I need to equalize every month is a real chore. I would buy a digital meter if they were affordable... Sigh.

This meter is extremely easy to read. However, it is critical that you develop a little skill to get a repeatable reading (this is also true of all other hydrometers, FYI). What I have found is that I need to load/unload 2-3 times (to make sure I have stirred up the battery fluid), hold carefully so it is vertical, maybe tap carefully, and WAIT for the mechanism to settle. The fluid is thick enough that it takes a few seconds to let it settle. Make sure no bubbles are stuck on the sensing wheel.

In conclusion, this device does not eliminate the difficulty of getting a repeatable and accurate reading, but it does give you a way to see the reading much more easily.

Don't purchase this if you think you can just dip and read. Sorry, it takes developing skill just like other hydrometers. If you can't go back to a cell and get the same reading you got the first time, keep working your skill development until your readings are consistent.

The product does what it claims: it makes reading the value easy.
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8 of 8 people found the following review helpful By S. Dang on January 11, 2012
Verified Purchase
This item turned out to be awesome. Given the price, I thought this was going to be made of cruddy construction, but it's actually a quality tool. The bulb does not come off, and is sealed very well. Easy to rinse.

Just remember to use something harder than your finger to tap on the side of the device to eliminate the bubbles during operation.

I had no problems using this. It worked perfectly for me.

Highly recommended.
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6 of 6 people found the following review helpful By M. Hemingway on January 11, 2010
Verified Purchase
This thing really helped me diagnose problems with a couple deep cycle batteries. I found one completely dead cell in one and weak cells in another battery.

It is kind of creepy to be that close to acid but it has to be done.
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4 of 4 people found the following review helpful By P. Scott Pope TOP 1000 REVIEWER on June 1, 2013
Verified Purchase
While this hydrometer appears to work as advertised, I was a bit surprised at the condition it was in when received. At first, I assumed it was used, which could present problems do to the possibility of contaminants. After closer inspection, the imperfections were inside the reservoir. Specifically, the two halves appear to have been sloppily glued together by an eight year old for a school project. Crazing (small cracks found in plastic) was present in various places.

While these issue may not have any effect on accuracy, one expects measuring instruments to be made with a higher level of precision to minimize the compounding of tolerance problems. Given what I received, the company's quality control is mediocre at best. Therefore, I would suggest checking out other hydrometers.
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