How do you read this thing? There is no arrow or other marking that acts as a guide.

There are two disks that rotate independently. I believe one is for automatic temperature compensation & the other is the specific gravity. When you take a specific gravity measurement, it will be obvious. Suck in enough battery "water" to cover the discs. It really is a brilliantly designed hydrometer, so much better than the glass tube & float type where you have to calculate the SG based on the temperature compensation read on the thermometer.

You squeeze the electrolyte back into the cell after testing right? And do you have to rinse it out before taking the next reading?

Yes, replace the electrolyte. Once out and you move to the next cell squeeze the bulb and suck in the new electrolyte three times to mix out any remaining electrolyte.

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Unitec 74274 Battery Hydrometer Hydro Volts

Unitec 74274 Battery Hydrometer Hydro Volts

Product ID: 39741595

🔋Accurate acid density & charge state measurement

⚖️Precision scale with 360° rotatable display

🛡️Hydrostatic barrier prevents leaks & air traps

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₩139085

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Description

🔋 Master Your Battery Health with Precision and Confidence!

LEAK PROOF DESIGN - Innovative hydrostatic barrier guarantees no spills or air bubbles disrupt your test.
EFFORTLESS OPERATION - Elastic suction bulb fills quickly and smoothly, eliminating annoying tapping.
360 ROTATABLE SCALE - Read measurements from any angle without awkward positioning or guesswork.
PRECISION YOU CAN TRUST - Large, easy-to-read scale ensures exact battery acid readings every time.
DURABLE GERMAN ENGINEERING - Built to last with premium materials, delivering years of reliable performance.

The Unitec 74274 Battery Hydrometer Hydro Volts is a precision German-made tool designed for lead-acid batteries. Featuring a large, rotatable scale and a hydrostatic barrier to prevent leaks and air bubbles, it delivers highly accurate acid density and charge state measurements. Durable and easy to use, it’s trusted by professionals for consistent, long-term battery maintenance.

Specifications

ASIN	B007CW8Y9S
Best Sellers Rank	#237,970 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #109 in Lab Hydrometers
Brand	Unitec
Customer Reviews	4.4 4.4 out of 5 stars (213)
Date First Available	July 3, 2013
Is Discontinued By Manufacturer	No
Item Weight	4.1 ounces
Item model number	74274
Manufacturer	Unitec
Manufacturer Part Number	74274
Product Dimensions	1.57 x 4.13 x 7.09 inches

Reviews

S**S

18.01.2026

J**I

16.07.2019

A**R

10.04.2021

W**L

6.05.2023

R**T

23.05.2025

J**A

14.08.2020

A**R

13.02.2017

S**3

2.09.2023

J**Z

10.04.2022

L**S

8.04.2023

T**B

5.11.2017

F**O

11.07.2020

K**Y

4.10.2024

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₩139085

Duties & taxes included

In stock

Sold byAmazon South KoreaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to South Korea.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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