---
product_id: 52699667
title: "RE300 ExStik ORP Meter"
brand: "extech"
price: "£149.00"
currency: GBP
in_stock: true
url: https://www.desertcart.co.uk/products/52699667-re300-exstik-orp-meter
store_origin: GB
region: United Kingdom
---

# High resolution 1mV precision Memory stores 15 readings + last calibration Simulated analog bargraph for instant trend visualization RE300 ExStik ORP Meter

**Brand:** extech
**Price:** £149.00
**Availability:** ✅ In Stock

## Summary

> ⚡ Stay ahead of the curve with precision ORP monitoring!

## Quick Answers

- **What is this?** RE300 ExStik ORP Meter by extech
- **How much does it cost?** £149.00 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/52699667-re300-exstik-orp-meter)

## Best For

- extech enthusiasts

## Why This Product

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

## Key Features

- • **Pinpoint Accuracy:** Experience ultra-fine 1mV resolution for exact ORP measurements.
- • **Compact & Portable:** Lightweight 120g design fits perfectly on your tabletop or in the field.
- • **Smart Memory Recall:** Never lose track—store and access up to 15 readings plus your last calibration.
- • **Instant Trend Insight:** Visualize ORP fluctuations in real-time with the intuitive analog bargraph.
- • **Effortless Calibration:** Automatic electronic self-calibration keeps your data reliable without hassle.

## Overview

The Extech RE300 ExStik ORP Meter delivers professional-grade oxidation-reduction potential readings from -999 to 999mV with 1mV resolution. Featuring automatic self-calibration, a simulated analog bargraph for real-time trend display, and memory storage for 15 readings plus the last calibration, it’s a compact, battery-powered tool designed for accuracy and convenience in water quality analysis.

## Description

Extech RE300 ExStik ORP Meter

## Features

- Measures ORP/Redox from -999 to 999mV
- Automatic electronic self calibration
- Simulated analog bargraph displays change in ORP reading
- High resolution of 1mV
- Memory stores and recalls 15 readings and saves last calibrated value

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Extech |
| Part Number | RE300 |
| Product Dimensions | 1.91 x 1.91 x 508.26 cm; 120 g |
| Batteries | 4 Lithium Metal batteries required. (included) |
| Item model number | RE300 |
| Colour | Green |
| Style | ORP |
| Voltage | 3 Volts |
| Item Package Quantity | 1 |
| Number of Pieces | 1 |
| Plug profile | Tabletop |
| Batteries included? | Yes |
| Batteries Required? | Yes |
| Battery Cell Type | Alkaline |
| Battery description | 4 × CR2032 (3V) batteries |
| Item Weight | 120 g |

## Product Details

- **Colour:** Green
- **Brand:** Extech
- **Item weight:** 0.12 Kilograms
- **Battery description:** 4 × CR2032 (3V) batteries
- **Mounting type:** Tabletop

## Images

![RE300 ExStik ORP Meter - Image 1](https://m.media-amazon.com/images/I/41E6wRYvaLL.jpg)

## Available Options

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

## Questions & Answers

**Q: Good morning, i would like to know how many probes are included in the instrument? in the second image i see two probes, could i send a real-time imag**
A: Thank you for your question. The full set includes:
Complete with 6 x AA batteries, SD card, hard carrying case,
sample buffers, mini pH electrode (60120B), and Thermistor
temperature probe (850188)

**Q: Can this perform orp readings without orp electrode? or do we have to buy 67500b standard orp electrode additionally? if so can you offer that as well**
A: Yes, you would need to order the orp probe to measure the orp.

**Q: Is this unit capable of continuous immersion logging of typical drinking water to SD card? We'll calibrate every 24 hours, but weekly is better**
A: Thank you so much for your interest in our products. Yes, the SDL100 is capable to datalog information from 1 second to almost 9 hours. All this data will be saved on the SD card. Please notice that the SD card capacity is up to 16GB. Please check all the specifications of this unit here http://www.extech.com/products/resources/SDL100_UM-en.pdf

**Q: What is the settling time for the ORP meter in weak redox solution such as tap water?**
A: It's bad

## Frequently Bought Together

- EXTECH Instruments RE300 ExStik ORP Meter
- Apera Instruments AI1113 pH Calibration Buffer Solution Kit (7.00, 4.00), 8 oz. Each
- Extech DO600 Waterproof ExStik II Dissolved Oxygen Meter

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*Product available on Desertcart United Kingdom*
*Store origin: GB*
*Last updated: 2026-05-16*