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EZRED SP101 Battery Hydrometer, Factory

4.6 4.6 out of 5 stars 2,992 ratings
$11.16
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1 pack
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Purchase options and add-ons

Brand EZRED
Power Source Hand Powered
Style 1 pack
Color Factory
Item Weight 0.15 Pounds

About this item

  • BATTERY HYDROMETER: This battery tester is made to stand up to tough treatment in service stations & garages. It's designed so that both customer & technician can see the state of the battery acid..Fit Type: Universal
  • RUGGED & EASY TO USE: This hydrometer makes reading & understanding battery levels easy, accurate, & quick, with no difficult float reading & no temperature tables required.
  • ACCURACY & RELIABILITY: With a range of 1. 100 – 1. 300, you can confidently know the state of charge for the battery cell. Great for use by professional battery techs, mechanics, or anyone else.
  • INNOVATION AT ITS FINEST: We make high quality hand tools & accessories, tool organizers, ratchet sets, LED flashlights & work lights. We specialize in tools for battery, heating & electrical work, for both the professional tradesperson and home DIY'er!
  • THE EZRED DIFFERENCE: Leading with innovation, our focus is to design, manufacture & deliver the most functional & durable professional grade tools & lights. Get the job done with EZRED tools!
› See more product details

Additional Details

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Customer ratings by feature

Easy to use
4.7 4.7
Easy to read
4.6 4.6
Accuracy
4.5 4.5
See all reviews

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From the manufacturer

Battery Hydrometer, EZRED, Battery ACID, Acid, Hydrometer, Plastic Hydrometer, Best, Cheapest, Trus

Use the Original Easy-To-Read Hydrometer

Trusted for over 50 years, our Hydrometer has been used by professionals and home DIY'ers time and time again. With our innovative design, we make reading and understanding the levels extremely easy, accurate, and quick

Filled With Features

Battery Hydrometer, EZRED, Battery ACID, Acid, Hydrometer, Plastic Hydrometer, Best, Cheapest, Trus

Some features of this battery hydrometer include:

  • A unique tight seal
  • Strong material
  • Made in the USA
  • Extremely durable
  • Dynamic accurate reading indicator
  • Simple and easy to use

Battery Hydrometer, EZRED, Battery ACID, Acid, Hydrometer, Plastic Hydrometer, Best, Cheapest, Trus

EZRED

EZRED is Proud to be an American based company for over 50 years!

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Warranty & Support

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EZRED SP101 Battery Hydrometer, Factory

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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.

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EZRED SP101 Battery Hydrometer, Factory
EZRED SP101 Battery Hydrometer, Factory
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Price$11.16$12.39$8.39$11.99-11% $39.46
Typical: $44.46		$24.99
Delivery
Get it as soon as Sunday, May 12
Get it as soon as Sunday, May 12
Get it as soon as Monday, May 13
Get it May 8 - 13
Get it as soon as Sunday, May 12
Get it as soon as Sunday, May 12
Customer Ratings
4.64.6 out of 5 stars2,992
4.34.3 out of 5 stars63
4.14.1 out of 5 stars48
5.05.0 out of 5 stars3
4.64.6 out of 5 stars3,899
4.44.4 out of 5 stars1,281
Easy to use
4.7
4.0
4.0
—
4.6
4.5
Accuracy
4.5
4.0
3.7
—
4.6
4.2
Easy to read
4.6
3.6
4.3
—
4.6
—
Sold By
Amazon.com
Karsewl
Watris
Mighty Max Battery
Amazon.com
AutomotiveZone
power source
Hand Powered
Battery Powered,electric
Battery Powered
Battery Powered
Battery Powered
Battery Powered
style
1 pack
Modern
—
—
Enamel
BM550 battery tester

Customer reviews

4.6 out of 5 stars
4.6 out of 5
2,992 global ratings

Customers say

Customers like the water to acid ratio of the electric circuit testing device. They say it's an excellent battery hydrometer that gets the job done. They also appreciate the accuracy, quality, and value of the product. Customers are happy with size, performance, and battery.

AI-generated from the text of customer reviews

249 customers mention231 positive18 negative

Customers are satisfied with the performance of the water meter. They mention that it works well, is small and USA made, and is a proven device. Some say that it's good for home use.

"This hydrometer works great. Easily sucks up battery acid and empties completely when squeezed. Reading is easy to read and seems accurate." Read more

"Easy to use easy to read. Works as expected. Not sure of accuracy." Read more

"Works great. As advertised.*WEAR SAFETY GLASSES!*" Read more

"seems to work well" Read more

173 customers mention166 positive7 negative

Customers find the density meter easy to use and read. They say it's simple and accurate. Customers also mention that the range is from 1.0 to about 1.3 specific gravity.

"...Reading is easy to read and seems accurate." Read more

"This EZred battery hydrometer is well made and easy to use...." Read more

"Easy to use easy to read. Works as expected. Not sure of accuracy." Read more

"Simple to read and easy to use." Read more

86 customers mention65 positive21 negative

Customers like the quality of the EZred battery hydrometer. They say it's well-made, sturdy enough for multiple uses, and reliable. Some customers even say it lasts for years with little care.

"This EZred battery hydrometer is well made and easy to use...." Read more

"This feels like a well-manufactured tool. Accuracy is good with the only solution I know the specific gravity of (pure water)...." Read more

"This Battery Hydrometer is very well made and durable and seems very accurate...." Read more

"...The build quality was also very poor as the overrun from the plastic mould/glue had been ground off and so the overall construction looked terribly..." Read more

76 customers mention65 positive11 negative

Customers like the value of the kitchen product. They mention it's a good quality hydrometer for the price.

"Woke as it should good price" Read more

"Good quality hydrometer for the price,good for home use.." Read more

"Seams well made , good price" Read more

"...This one is inexpensive, and works great...." Read more

65 customers mention50 positive15 negative

Customers like the accuracy of the battery hydrometer. They mention that it's well-made, durable, and accurate. Some say that the precision is very good, and the readings are consistent if used properly.

"...Reading is easy to read and seems accurate." Read more

"This feels like a well-manufactured tool. Accuracy is good with the only solution I know the specific gravity of (pure water)...." Read more

"This Battery Hydrometer is very well made and durable and seems very accurate...." Read more

"Easy to use easy to read. Works as expected. Not sure of accuracy." Read more

28 customers mention28 positive0 negative

Customers are satisfied with the water to acid ratio of the electric circuit testing device. They mention that it's an excellent battery hydrometer, it'll get the job done, and is a handy tool that gets the job.

"...as some negative reviewers stated and if used properly provides accurate specific gravity, and thus level of charge, readings for liquid-filled lead-..." Read more

"...It's high quality, Made in USA. It has the specific gravity numbers, which I was looking for, as this gives you more information to work with...." Read more

"...The tester was easy to use and gives specific gravity between a reading of water(S.G. 1.0) and 1.300...." Read more

"This one is better, it has the specific gravity reading on a scale, rather than the "floating balls"." Read more

23 customers mention19 positive4 negative

Customers like the battery. They say it's great for someone who checks batteries often, and easy to use. They also say it gives a good sense of battery health, and is great for keeping an eye on battery charge. Customers also mention that it'll prevent them from having bad batteries.

"I was looking for someting fast and easy to check lead acid batteries. This does the trick." Read more

"...The battery holds a full charge as shown on a multimeter. The one cell is still weak, but all the others are fine...." Read more

"...Great for someone who checks batteries often or if you live off the grid with batteries." Read more

"...It says that that they are OK. The battery works. I am happy." Read more

22 customers mention18 positive4 negative

Customers like the size of the kitchen product. They say it's relatively small and easy to use. They also say it is a compact unit that requires no time to get used to. Customers also say that it is great for limited overhead space. They like the idea of a small sized and tough hydrometer to put in their toolkit. The pointer is small, and the markings on the surface are precise. The dial or meter is plenty large enough to see at arms length with the light.

"I like this design because it's smaller than some and doesn't take as much coolant to fill the pointer body to read it. One squeeze fills it easy...." Read more

"I LIKED THE IDEA OF A SMALL SIZED AND TUFF HYDROMETER TO PUT IN MY TOOLKIT, ESPECIALLY WHEN COMPARED WITH THE FRAGILE GLASS HYDROMETERS THAT SOME..." Read more

"Easy to read and accurate. The tube fits easily into the battery cells." Read more

"The hydrometer is small so the volume of electrolyte that must be drawn is small...." Read more

Essential for testing FLA electrolyte
5 Stars
Essential for testing FLA electrolyte
Easy way to measure electrolyte specific gravity. Make sure you get enough electrolyte for the float to move freely, or you'll get an artificially low reading. This battery was charged to 12.3V.
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Top reviews from the United States

P. Williams
5.0 out of 5 stars Hydrometer
Reviewed in the United States on April 7, 2024
Style: 1 packVerified Purchase
This hydrometer works great. Easily sucks up battery acid and empties completely when squeezed. Reading is easy to read and seems accurate.
Helpful
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Beverly Ellington
5.0 out of 5 stars Great Product, don't believe the few negative reviews
Reviewed in the United States on December 31, 2023
Style: 1 packVerified Purchase
This EZred battery hydrometer is well made and easy to use. It does not leak as some negative reviewers stated and if used properly provides accurate specific gravity, and thus level of charge, readings for liquid-filled lead-acid batteries. If this product doesn't work for you, then you most likely have no business touching a battery in the first place. If however, you somehow received a broken or defective product, give the supplier a negative review and not the product.
4 people found this helpful
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Raymond Barthe
4.0 out of 5 stars works as expected.
Reviewed in the United States on March 24, 2024
Style: 1 packVerified Purchase
Easy to use easy to read. Works as expected. Not sure of accuracy.
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Sarah Willis
5.0 out of 5 stars Works as intended
Reviewed in the United States on March 23, 2024
Style: 1 packVerified Purchase
Works great. As advertised.
*WEAR SAFETY GLASSES!*
Helpful
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Tony P.
5.0 out of 5 stars Great tool to assess battery
Reviewed in the United States on April 13, 2024
Style: 1 packVerified Purchase
Simple to read and easy to use.
Helpful
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charles c
5.0 out of 5 stars good value
Reviewed in the United States on February 29, 2024
Style: 1 packVerified Purchase
seems to work well
Helpful
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justbrat777
5.0 out of 5 stars great
Reviewed in the United States on April 29, 2024
Style: 1 packVerified Purchase
easy to use
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David Anthony Nedved
3.0 out of 5 stars other comments on difficulty reading are spot-on
Reviewed in the United States on September 20, 2022
Style: 1 packVerified Purchase
This feels like a well-manufactured tool. Accuracy is good with the only solution I know the specific gravity of (pure water). I'll give them the benefit of the doubt that it remains accurate throughout the scale. Other comments talking about how hard it is to read the numbers on the clear plastic housing are completely legit. You've got multiple different colors of writing (none of them high-contrast like BLACK for example) printed on clear plastic. No background. You need perfect lighting and possibly a white piece of paper to hold behind the meter to have any chance of reading it. This can be difficult to manage with just two hands depending on where the batteries you're measuring are located, even if you free up a hand by using a head lamp. All of course while making certain not to drip acid on anything important.
7 people found this helpful
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Top reviews from other countries

Terry
5.0 out of 5 stars Compact size, accurate, durable
Reviewed in Canada on April 12, 2024
Style: 1 packVerified Purchase
works well, compact size, good quality, accurate compared with bulb type hydrometer. Plastic construction won't break in the tool bag.
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Paul D
4.0 out of 5 stars Initially I concluded it was not consistent BUT now
Reviewed in the United Kingdom on July 24, 2023
Style: 1 packVerified Purchase
I initially wrote this:
'Easy to use but the results are not consistent. If I take three readings from the same cell they will all be different.'
BUT MY ENGINEER TELLS ME THAT IF YOU TAKE MULTIPLE READINGS QUICKLY FROM THE SAME CELL YOU GET DIFFERENT RESULTS. SO MAYBE IT IS OKAY.
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Sheo J.
5.0 out of 5 stars Most accurate result
Reviewed in India on November 4, 2022
Style: 1 packVerified Purchase
It’s costly but more accurate than any generic hydrometer
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David R Hopton
5.0 out of 5 stars Very easy to read
Reviewed in Australia on April 16, 2023
Style: 1 packVerified Purchase
Unlike a lot of other battery acid gauges, this is the easiest to read with its unique dial.
One person found this helpful
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Toronto
5.0 out of 5 stars Works
Reviewed in Canada on October 2, 2023
Style: 1 packVerified Purchase
Tested on my dying battery and the readings was accurate.Well made easy to read.
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