---
product_id: 401892389
title: "ORP Redox Meter r -1999~1999mV, 1-Point Calibration, Oxidation Reduction Potential (ORP Sol'n 30ML x 2pcs)"
brand: "gain express"
price: "€ 72.93"
currency: EUR
in_stock: true
reviews_count: 5
category: "Gain Express"
url: https://www.desertcart.de/products/401892389-orp-redox-meter-r-1999-1999mv-1-point-calibration-oxidation
store_origin: DE
region: Germany
---

# ±1999mV ultra-wide range 2x 30ml solution bottles 256mV precise calibration ORP Redox Meter r -1999~1999mV, 1-Point Calibration, Oxidation Reduction Potential (ORP Sol'n 30ML x 2pcs)

**Brand:** gain express
**Price:** € 72.93
**Availability:** ✅ In Stock

## Summary

> 💧 Stay ahead in water quality with precision you can trust!

## Quick Answers

- **What is this?** ORP Redox Meter r -1999~1999mV, 1-Point Calibration, Oxidation Reduction Potential (ORP Sol'n 30ML x 2pcs) by gain express
- **How much does it cost?** € 72.93 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.de](https://www.desertcart.de/products/401892389-orp-redox-meter-r-1999-1999mv-1-point-calibration-oxidation)

## 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

- • **Wide Measurement Range:** Covers -1999 to 1999mV for versatile water quality monitoring
- • **Upgrade Beyond Test Strips:** Fast, consistent digital results that professionals trust
- • **Ready-to-Use Solution Packs:** Two 30ml bottles included for hassle-free calibration
- • **Ideal for Aquatic Environments:** Perfect for pools, aquariums, and other water systems needing reliable ORP control
- • **Precision-Calibrated for Accuracy:** 256mV calibration ensures spot-on ORP readings every time

## Overview

The Gain Express ORP Redox Meter calibration solution offers a precise 256mV standard for accurate oxidation-reduction potential measurements across a wide range (-1999 to 1999mV). Supplied as two 30ml bottles, it ensures reliable, consistent calibration for digital ORP meters used in pools, aquariums, and other water quality applications, delivering professional-grade results beyond basic test strips.

## Description

This optional 256mv calibration solution 30ml is used for Digital Redox Meter -1999mV~1999mV Millivolts Pool Aquarium Oxidation Reduction Potential (ORP)Set includes.2 x solution 30ml

Review: I won't go back to basic test strips again. These are quick and easy for pool water monitoring and the results align well with other more complicated tests I've done.
Review: Conforme

## Features

- High-quality ORP calibration solution with a precise 256mV reading
- Easy to use with a 30ml bottle and clear instructions
- Accurate measurements for aquariums, pools, and other water applications
- Reliable and consistent results for optimal water quality control
- Essential for maintaining healthy aquatic environments

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08J7NWH3V |
| Item model number | ORP-256MV_2PCS |
| Manufacturer | Gain Express Holdings Ltd |
| Package Dimensions | 9.8 x 9.6 x 5.41 cm; 118 g |

## Product Details

- **Brand:** GAIN EXPRESS
- **Colour:** ORP Sol'n 30ML x 2pcs
- **Measurement type:** millivolts
- **Power source:** Battery Powered
- **Style:** Digital

## Images

![ORP Redox Meter r -1999~1999mV, 1-Point Calibration, Oxidation Reduction Potential (ORP Sol'n 30ML x 2pcs) - Image 1](https://m.media-amazon.com/images/I/61sat-i4LpL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by C***W on 25 October 2025*

I won't go back to basic test strips again. These are quick and easy for pool water monitoring and the results align well with other more complicated tests I've done.

### ⭐⭐⭐⭐⭐ Review
*by D***T on 18 August 2025*

Conforme

### ⭐⭐⭐⭐⭐ Review
*by M***L on 11 July 2025*

As described by seller

## Frequently Bought Together

- Gain Express ORP Redox Meter Tester -1999~1999mV, 1-Point Calibration, Oxidation Reduction Potential (ORP Sol'n 30ML x 2pcs)
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*Product available on Desertcart Germany*
*Store origin: DE*
*Last updated: 2026-03-15*