---
product_id: 514754304
title: "GroStar GS4 pH/EC/ppm Tester"
brand: "apera instruments"
price: "E£ 24672"
currency: EGP
in_stock: true
category: "Apera Instruments"
url: https://www.desertcart.com.eg/products/514754304-grostar-gs4-ph-ec-ppm-tester
store_origin: EG
region: Egypt
---

# Fast 2-point calibration in 60s 5-in-1 multi-parameter precision Replaceable double-junction probe GroStar GS4 pH/EC/ppm Tester

**Brand:** apera instruments
**Price:** E£ 24672
**Availability:** ✅ In Stock

## Summary

> 🌱 Grow Smarter, Not Harder — The Ultimate Hydroponic Water Quality Sidekick

## Quick Answers

- **What is this?** GroStar GS4 pH/EC/ppm Tester by apera instruments
- **How much does it cost?** E£ 24672 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.eg](https://www.desertcart.com.eg/products/514754304-grostar-gs4-ph-ec-ppm-tester)

## Best For

- apera instruments enthusiasts

## Why This Product

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

## Key Features

- • **All-in-One Monitoring:** pH, EC, TDS (500 & 700ppm), and temperature in one sleek pen
- • **Effortless Calibration:** HD backlit screen with quick 2-point calibration workflow
- • **Durability You Can Trust:** Replaceable double-junction pH/EC probe built for longevity
- • **Smart Maintenance Alerts:** Electrode condition indicator and calibration reminders keep you ahead
- • **Precision Meets Practicality:** Lab-grade accuracy tailored for hydroponic pros

## Overview

The Apera Instruments AI104G GroStar GS4 is a lab-grade 5-in-1 pen tester designed for hydroponic growers, combining pH, EC, TDS (500 & 700ppm), and temperature measurements with a replaceable double-junction probe. Featuring a grower-friendly HD backlit screen and fast 2-point calibration, it ensures precise, reliable water quality testing with smart maintenance alerts to maximize probe lifespan and crop success.

## Description

Apera Instruments GroStar GS4 pH/EC/ppm Combo Pen Tester (Gen II) is a lab-grade multiparameter meter designed specifically for growers to easily manage crop success, featuring a replaceable pH/conductivity combo sensor and a grower-friendly workflow along with other intelligent functions and features that help reduce the guesswork and give you the confidence in every measurement.

## Features

- Lab-grade pH/EC/TDS meter designed specifically to meet growers' needs and habits
- Measures pH, EC, 700ppm, 500ppm, and temperature with premium probe technologies, ensuring high accuracy and durability with minimal maintenance
- Grower-friendly calibration workflow on an HD backlit screen allows you to finish 2-point calibration within a minute
- Replaceable combo pH/EC probe with double junction pH sensor and titanium EC sensor
- Electrode condition indicator and calibration reminder function help you perform proper maintenance in a breeze

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0BGQFPGMY |
| Batteries | 4 AAA batteries required. (included) |
| Best Sellers Rank | #42,198 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #43 in Lab pH Meters |
| Date First Available | September 28, 2022 |
| Item Weight | 4.7 ounces |
| Item model number | AI104G |
| Manufacturer | Apera Instruments |
| Product Dimensions | 7 x 1.5 x 1.3 inches |

## Images

![GroStar GS4 pH/EC/ppm Tester - Image 1](https://m.media-amazon.com/images/I/61QciN9a4YL.jpg)
![GroStar GS4 pH/EC/ppm Tester - Image 2](https://m.media-amazon.com/images/I/61wHfmPlk9L.jpg)
![GroStar GS4 pH/EC/ppm Tester - Image 3](https://m.media-amazon.com/images/I/71UT803XjdL.jpg)
![GroStar GS4 pH/EC/ppm Tester - Image 4](https://m.media-amazon.com/images/I/71Cz3ZUm4lL.jpg)
![GroStar GS4 pH/EC/ppm Tester - Image 5](https://m.media-amazon.com/images/I/71a4HYma+lL.jpg)

## Available Options

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

## Frequently Bought Together

- Apera Instruments AI104G GroStar Series GS4 pH/EC/500ppm/700ppm Combo 5-in-1 Pen Tester Kit with Replaceable Double-Junction pH/EC Probe for Hydroponics Water Quality Testing, Gen II
- Apera Instruments pH Probe Electrode Sensor Care Maintenance Kit, Including pH 4/7/10 buffers, 3M KCL Soaking Solution, Probe Cleaning Solution, a CalPod Solution Organizer (AI1170)
- Apera Instruments 3M KCL Storage Soaking Solution (8 oz.) for pH and ORP Electrodes

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**Shop now:** [https://www.desertcart.com.eg/products/514754304-grostar-gs4-ph-ec-ppm-tester](https://www.desertcart.com.eg/products/514754304-grostar-gs4-ph-ec-ppm-tester)

---

*Product available on Desertcart Egypt*
*Store origin: EG*
*Last updated: 2026-07-12*