---
product_id: 1667191
title: "SP101 Battery Hydrometer, Factory"
brand: "ezred"
price: "€ 19.60"
currency: EUR
in_stock: true
reviews_count: 13
category: "Ezred"
url: https://www.desertcart.ie/products/1667191-sp101-battery-hydrometer-factory
store_origin: IE
region: Ireland
---

# Measures battery specific gravity 1.100–1.300 Quick, no-fuss readings without temperature tables Rugged ABS plastic for tough garage use SP101 Battery Hydrometer, Factory

**Brand:** ezred
**Price:** € 19.60
**Availability:** ✅ In Stock

## Summary

> 🔋 Know your battery’s true power—no guesswork, just results!

## Quick Answers

- **What is this?** SP101 Battery Hydrometer, Factory by ezred
- **How much does it cost?** € 19.60 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/1667191-sp101-battery-hydrometer-factory)

## Best For

- ezred enthusiasts

## Why This Product

- Trusted ezred brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Built to Endure:** Rugged ABS construction designed for professional service environments
- • **Effortless Operation:** No complex float readings or temperature adjustments needed
- • **Lifetime Reliability:** Limited lifetime warranty ensures long-term trust and performance
- • **Universal Compatibility:** Fits all standard lead-acid batteries with ease
- • **Precision Battery Health Check:** Accurately gauges battery acid state for confident diagnostics

## Overview

The EZRED SP101 Battery Hydrometer is a professional-grade, rugged tool designed for quick and accurate measurement of battery acid specific gravity (1.100–1.300). Its durable ABS plastic build withstands harsh garage environments, while its intuitive design eliminates complicated readings and temperature corrections. Trusted by technicians and DIYers alike, it offers universal compatibility and a limited lifetime warranty, making it the go-to hydrometer for reliable battery health monitoring.

## 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.

Review: Great tool, great price...easy to use and understand - Worked well for monitoring/bringing back 6v batteries on my lift. Batteries were charging for 3days while I monitored the PH with this tool and was able to see it increasing daily vs assuming if batteries were improving. Let's you know if they'll hold a charge or if you're wasting your time charging. Use only "distilled" water if refurbishing/filling
Review: Perfect, Great value, perfect - Works very well. Excellent build quality. Ease of use and design is good. Able to use as a transfer from one cell to another. I squeeze the top slowly to absorb the material into unit. Extremely sensitive readings with this product which worked great for me. Do not breathe the fumes so this works very well in doing that. Be safe. Wash it up and put unit back into the package it came in. Awesome. Thanks

## Features

- 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!

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000JFHMRU |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #9,856 in Automotive ( See Top 100 in Automotive ) #17 in Battery Testers |
| Brand | EZRED |
| Color | Red |
| Customer Reviews | 4.6 4.6 out of 5 stars (3,346) |
| Date First Available | August 12, 2004 |
| Global Trade Identification Number | 00008965001070 |
| Included Components | SP101 |
| Is Discontinued By Manufacturer | Yes |
| Item Package Quantity | 1 |
| Item Weight | 2.4 ounces |
| Item dimensions L x W x H | 0.5 x 11.4 x 1.3 inches |
| Item model number | SP101 |
| Manufacturer | EZRED |
| Material | ABS Plastic |
| Measurement Type | Specific Gravity Meter |
| Min. Operating Voltage | 2.1 Volts |
| Number Of Pieces | 1 |
| Part Number | SP101 |
| Pattern | Solid color, no pattern |
| Power Source | Battery Powered |
| Product Dimensions | 0.5 x 11.4 x 1.3 inches |
| Size | 11.4 x 0.5 x 1.3 inches |
| Style | 1 pack |
| UPC | 008965001070 |
| Warranty Description | Limited Lifetime |

## Product Details

- **Brand:** EZRED
- **Color:** Red
- **Item Weight:** 2.4 ounces
- **Power Source:** Battery Powered
- **Style:** 1 pack

## Images

![SP101 Battery Hydrometer, Factory - Image 1](https://m.media-amazon.com/images/I/71r+0kP1e4L.jpg)

## Available Options

This product comes in different **Style** options.

## Questions & Answers

**Q: Can this hydrometer be used to measure the sg on other liquids? i'm trying to figure out the specicific gravity on magnesium sulphate solutions**
A: Snow,Thank you for contacting us.The E-Z Red SP101 Battery Hydrometer is designed for use with battery electrolyte solution only.http://www.amazon.com/E-Z-Red-SP101-Battery-Hydrometer/dp/B000JFHMRU?ie=UTF8&keywords=E-Z%20Red%20SP101%20Battery%20Hydrometer&m=A2U296R8AN80PO&qid=1462886003&ref_=sr_1_1&s=merchant-items&sr=1-1

**Q: Does it automatically adjust for temperature?**
A: The storage sleeve it comes in says "temperature compensating"  so the answer is yes.

**Q: Can I use it on a golf cart batteries? Thank you.**
A: Absolutely,  you may use it with any flooded batteries.

**Q: What is the expected life span of the rubber suction bulb on this Hydrometer?**
A: I have had my personal one for over nine years. This is Florida, humidity tend to be high and I clean it after every use. If you neglect it and leave grease or other residues on it the rubber will degrade and will not be able to do its job. It Depends on the care and environment where you operate. It is rubber after all.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great tool, great price...easy to use and understand
*by J***S on January 3, 2026*

Worked well for monitoring/bringing back 6v batteries on my lift. Batteries were charging for 3days while I monitored the PH with this tool and was able to see it increasing daily vs assuming if batteries were improving. Let's you know if they'll hold a charge or if you're wasting your time charging. Use only "distilled" water if refurbishing/filling

### ⭐⭐⭐⭐⭐ Perfect, Great value, perfect
*by L***N on June 25, 2025*

Works very well. Excellent build quality. Ease of use and design is good. Able to use as a transfer from one cell to another. I squeeze the top slowly to absorb the material into unit. Extremely sensitive readings with this product which worked great for me. Do not breathe the fumes so this works very well in doing that. Be safe. Wash it up and put unit back into the package it came in. Awesome. Thanks

### ⭐⭐⭐⭐⭐ Cheap, easy to use battery tester
*by K***I on December 23, 2024*

I use this to check SG off a forklift battery that I'm using in my off-grid solar system. It seems to be working and SG tracks voltage as expected. It's easy to use and does the job. I didn't know how accurate it is as I didn't have anything to compare it to. I have a couple of criticisms, I wish it had numbers marked between fair and good so I don't have to estimate, and I see small cracking around the edges which I know can come from the method used to weld the 2 halves together or if solvent is used to clean it in the manufacturing process, but to be fair, I have also left this under the metal cover of my battery outside, so it has been exposed to the elements and temperature swings below freezing. So far no leaks but even if the long term durability isn't there, it's cheap enough to just buy another one.

## Frequently Bought Together

- EZRED SP101 Battery Hydrometer, Factory
- LubriMatic 75-033 Battery Filler w/ Rubber Spout, red, 1 Count (Pack of 1)
- FORTIVO Battery Restorer and Desulfator for Lead Acid Battery - Prolong Life & Boost Charge Capacity, Battery Acid Refill and Additive for Golf Cart, RVs, Bikes, ATVs, Car Battery 64oz

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*Product available on Desertcart Ireland*
*Store origin: IE*
*Last updated: 2026-03-21*