---
product_id: 18741742
title: "Gain Express 3-in-1 Automotive Battery Antifreeze Refractometer ATC with Calibration Knob, Ethylene Propylene Glycol/Battery Fluids Specific Gravity, Charge Test Cooling System Coolant Freezing Point"
brand: "gain express"
price: "€ 1.49"
currency: EUR
in_stock: false
reviews_count: 1
url: https://www.desertcart.ie/products/18741742-gain-express-3-in-1-automotive-battery-antifreeze-refractometer-atc
store_origin: IE
region: Ireland
---

# 3 Scales in 1 Battery Health Check Coolant Freezing Point Gain Express 3-in-1 Automotive Battery Antifreeze Refractometer ATC with Calibration Knob, Ethylene Propylene Glycol/Battery Fluids Specific Gravity, Charge Test Cooling System Coolant Freezing Point

**Brand:** gain express
**Price:** € 1.49
**Availability:** ❌ Out of Stock

## Summary

> 🔧 Elevate Your Automotive Care with Precision!

## Quick Answers

- **What is this?** Gain Express 3-in-1 Automotive Battery Antifreeze Refractometer ATC with Calibration Knob, Ethylene Propylene Glycol/Battery Fluids Specific Gravity, Charge Test Cooling System Coolant Freezing Point by gain express
- **How much does it cost?** € 1.49 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/18741742-gain-express-3-in-1-automotive-battery-antifreeze-refractometer-atc)

## Best For

- gain express enthusiasts

## Why This Product

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

## Key Features

- • **User-Friendly Design:** Built-in calibration knob for hassle-free adjustments—no screwdriver needed!
- • **Precision Measurement:** Monitor your battery's charge and health with pinpoint accuracy.
- • **Versatile Application:** Measure Ethylene Glycol, Propylene Glycol, and battery fluids all in one tool.
- • **Preventative Maintenance:** Avoid rust and freezing issues with proactive coolant and battery monitoring.
- • **Auto Temperature Compensation:** Enjoy reliable readings regardless of temperature fluctuations.

## Overview

The Gain Express 3-in-1 Automotive Battery Antifreeze Refractometer is a versatile tool designed for automotive enthusiasts and professionals alike. It features three measurement scales for Ethylene Glycol, Propylene Glycol, and battery fluids, ensuring accurate readings for optimal vehicle performance. With a built-in calibration knob and auto temperature compensation, this refractometer simplifies maintenance and enhances reliability, making it an essential addition to your automotive toolkit.

## Description

Antifreeze refractometers are designed to test the concentration of battery fluids, antifreeze liquid and cleaning fluids. The indicated percentage show which temperature the fluid will be frozen for both propylene glycol and ethylene glycol. It can also be used for checking the strength of electrolyte battery solutions. This model uses °C unit system chart. With the indication of the percentage you will know the freezing point of either ethylene or propylene glycol based cooling systems. Also, it can be used to test the concentration of ethylene or propylene glycol in antifreeze liquids. Ideal for field use - the refractometer has ATC (Automatic Temperature Compensation) for precise measurement without having to re-calibrate after changes in ambient working temperature. Features * With Built-in Calibration Knob, no need for a mini-screwdriver * Needs ambient light only during test * Adjustable manual focusing * Soft rubber eye piece for comfortable viewing * Accurate testing results guaranteed * Extremely focus and easy-to-use * With non-slip grip * Clear chart, easy and comfortable reading of results * Made w/ highest and finest quality of aluminum & rubber making it lightweight, durable and last long Specifications Measuring Range: Ethylene Glycol: -60 - 0°C (0-66.6%)  Propylene Glycol: -50 - 0°C (0-62.4%)  Battery Fluids: 1.100 - 1.400sg Resolution Factor: Ethylene Glycol: 5°C  Propylene Glycol: 5°C  Battery Fluids: 0.01sg  Automatic Temperature Compensation (ATC): 10-30°C (50-86°F)  Set Includes 1 x Refractometer with Built-in Calibration Knob 1 x English Instruction Manual 1 x Pipette Sturdy Plastic carrying case

## Features

- 3 Scales in 1: Measuring Range: Ethylene Glycol: -60°C ~ 0°C Propylene Glycol: -50°C ~ 0°C Battery : 1.100-1.400sg
- Monitor reliability of your battery charge & health condition
- Ensure all is working properly and not causing problems like rust, prone to freezing, poor charging, poor cooling, etc
- New Design with built in calibration knob, does not need to use screwdriver for calibration anymore, giving much more convenience to users
- Auto Temperature Compensation (ATC), rest easy that your measurements are always accurate regardless of temperature variation

## Images

![Gain Express 3-in-1 Automotive Battery Antifreeze Refractometer ATC with Calibration Knob, Ethylene Propylene Glycol/Battery Fluids Specific Gravity, Charge Test Cooling System Coolant Freezing Point - Image 1](https://m.media-amazon.com/images/I/418StBaTkXL.jpg)
![Gain Express 3-in-1 Automotive Battery Antifreeze Refractometer ATC with Calibration Knob, Ethylene Propylene Glycol/Battery Fluids Specific Gravity, Charge Test Cooling System Coolant Freezing Point - Image 2](https://m.media-amazon.com/images/I/71qV7a78rFL.jpg)
![Gain Express 3-in-1 Automotive Battery Antifreeze Refractometer ATC with Calibration Knob, Ethylene Propylene Glycol/Battery Fluids Specific Gravity, Charge Test Cooling System Coolant Freezing Point - Image 3](https://m.media-amazon.com/images/I/71NvGhOlBIL.jpg)
![Gain Express 3-in-1 Automotive Battery Antifreeze Refractometer ATC with Calibration Knob, Ethylene Propylene Glycol/Battery Fluids Specific Gravity, Charge Test Cooling System Coolant Freezing Point - Image 4](https://m.media-amazon.com/images/I/71SSuEZM01L.jpg)
![Gain Express 3-in-1 Automotive Battery Antifreeze Refractometer ATC with Calibration Knob, Ethylene Propylene Glycol/Battery Fluids Specific Gravity, Charge Test Cooling System Coolant Freezing Point - Image 5](https://m.media-amazon.com/images/I/71n75rdnGUL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐ 4.0 out of 5 stars







  
  
    ... does what it supposed to do and I am happy with that
  

*by A***N on Reviewed in the United States on December 8, 2016*

The tool does what it supposed to do and I am happy with that. Delivery was exceedingly slow, not happy with that.

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.ie/products/18741742-gain-express-3-in-1-automotive-battery-antifreeze-refractometer-atc](https://www.desertcart.ie/products/18741742-gain-express-3-in-1-automotive-battery-antifreeze-refractometer-atc)

---

*Product available on Desertcart Ireland*
*Store origin: IE*
*Last updated: 2026-02-21*