> **Source:** Core Electronics is an Australian maker-electronics retailer and manufacturer based in Newcastle, NSW, run by a team of makers and educators. We design and manufacture our own product lines (PiicoDev, CE originals) and are official retailers for iconic maker and industrial brands including Raspberry Pi, Arduino, Adafruit, SparkFun and DFRobot. Orders ship Australia-wide from our Newcastle warehouse. Prices are in AUD and include GST. Pricing, stock and dispatch on this page are generated from the store's live catalog. Full machine-readable index: https://core-electronics.com.au/llms.txt

# Gravity: Analog ORP Sensor PRO

**Type:** Product page · **SKU:** SEN0464 · **Brand:** [DFRobot](https://core-electronics.com.au/brands/dfrobot-australia)
**Page:** https://core-electronics.com.au/gravity-analog-orp-sensor-pro.html ([markdown](https://core-electronics.com.au/gravity-analog-orp-sensor-pro.html.md))

As an upgraded version of industrial Gravity: ORP Sensor Meter For Arduino, this new generation ORP probe employs platinum indicator electrode and...

## Pricing

- **Price:** $224.95 (inc GST) — $204.50 AUD, exc GST
- **Quantity discounts:** 6+ $194.27 (exc GST) · 12+ $186.09 (exc GST)

## Availability & dispatch

- Available with a lead time — expect dispatch between Aug 24 and Aug 28.

## How to buy

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## Description

As an **upgraded version** of [Industrial Gravity: ORP Sensor Meter For Arduino](https://www.dfrobot.com/product-1071.html), this new generation ORP probe employs platinum indicator electrode and silver-silver chloride reference electrode, **which makes it available for 24-hour online ORP monitoring and greatly enhances product durability.**

The new signal converter adds a more stable voltage reference so that the sensor readings would be no longer affected by supply voltage fluctuations. Besides, there are screws, copper columns and waterproof connectors included in the accessory packet to help you conveniently build up ORP monitoring system.

![](https://core-electronics.com.au/media/wysiwyg/product_images/Board-Overview-SEN0464.jpg)

ORP(Oxidation-Reduction Potential) is a measure of the ability of oxidation and reduction of an aqueous solution, which the relative degree of oxidizing or reducing. The unit is mV.

If the oxidation reduction potential is high then chemical oxidation is strong, while if the potential is lower then oxidation is weaker.

The positive potential means that solution shows a certain degree of oxidation, while the negative potential means that solution shows a certain degree of reduction. ORP is an important index of water quality detection, although it can not separate water quality independently, it can be combined with other water quality indexes to reflect the ecological environment better.

![](https://core-electronics.com.au/media/wysiwyg/product_images/Board-Overview-SEN0464-2.jpg)

### Features

- 24-hour online ORP monitoring
 
### Applications

- ORP monitoring system
 
### Specification

**ORP Signal Converter**

- Input Voltage: 5V
- Input Signal: 0.5V ~ 4.5V
- Input Interface: 5.08mm/0.20" Pluggable Connector
- Measuring Range: -2000mV ~ +2000mV
- Output Interface: PH2.0 - 3Pin
- Module Size: 42mm×32mm/1.65×1.26"
 
**Industrial ORP Probe**

- Indicator Electrode: Platinum
- Reference Electrode: silver-silver chloride
- Suitable Temperature: 5-70°C
- Electrode Potential: 245mV ~ 270mV
- Reference Electrode Internal Resistance: =10KΩ
- Electrode Stability: ±8mV/24h
 
### Documents

- [Product wiki](https://wiki.dfrobot.com/Gravity_Analog_ORP_Sensor_PRO_SKU_SEN0464)
 
### Parts List

- Gravity: Analog ORP Signal Converter x1
- Industrial ORP Probe x1
- Waterproof Aviation Cable Connector x1
- Waterproof Cable Gland x1
- Nylon Screw x1
- Nylon Column x1

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/i/m/image_3880.jpg)