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Ion Specific Electrode Probe Interface

Ion Specific Electrode Probe Interface

Single-unit price: $18.00 + shipping

Campaign ends when minimum unit count is reached

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Backers: 8

Target icon campaign show

Target: 25

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Funded: 36%

  • Campaign Created
  • Campaign Reached Goal
  • Campaign Closed
  • Shipping to GroupGets
  • GroupGets Received
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Product Details


Ion Specific Electrode Probe Interface

Brand / Manufacturer

universal fire

Product Description

Add the ability to measure pH, ORP, or any mV probe to your Arduino or Raspberry Pi project.

Some quick facts...

  • boards are assembled and tested in-house
  • hardware and software files are open-source
  • designed with simplicity in mind

Why we're better than the other our competitors...

  • just as accurate
  • significantly easier to use
  • all-inclusive system, no need to buy connectors
  • a temperature sensor is available on all the boards

Measure pH or ORP

  • measure pH with temperature compensation
  • measure ORP and Eh
  • read the raw mV output of any ion specific probe
  • read temperature in Celsius/Fahrenheit

What it is

An I2C sensor device that can read any voltage based sensor such as a pH or ORP probe. There are pin headers available to connect a DS18B20 temperature sensor for temperature compensation. The firmware on the device provides two calibration options, single or dual point. The hardware and all firmware/software is open source and available for anyone to modify or improve upon.

Using it

There is extensive documentation on the specifications, setup, and use of the device.

The library to use it is in the Arduino and IDE. A python and rust implementation for Raspberry Pi is available. There is also a MicroPython library.

Image of board with ESP32

Example Projects

Here are some Instrucable links to projects using this:

IoT Pool Monitoring using to graph the data
IoT Hydroponics - Using IBM's Watson for graphing and another hydroponic system using

ESP32 Bluetooth Interface

To make getting started quicker for everyone, an ESP32 Bluetooth Low Energy library is available. It requires little to no programming experience and provides a graphical front-end for showing the measured values from the probe interface. It works within the Chrome browser on any device with a Bluetooth adapter. A Websockets version is also available.

Why GroupGets?

Take advantage of volume pricing and get 10% off the regular price for the board and probes.

External Links

Manufacturer product page

Purchase Information

Unit Deliverable

One interface board.

Unit Price


Campaign Part #



Campaign unsuccessful, ends when minimum unit count reached

Factory Lead Time

One Month Days

Options and Add-Ons

pH Probe


The probe is gel-filled, single-junction, with a plastic body and a one meter cable. Single-use calibration powder in pH 4/7/10 is also included.

pH Probe Image

ORP Probe


A gel-filled, 245 mV potential ORP probe with a platinum disc electrode and a one meter cable.

Temperature Sensor


A DS18B20 waterproof temperature sensor with a one meter cable.

Temperature Sensor

ESP32 Development Board


A 4 megabyte ESP32 Development Board with the BLE interface pre-programmed.


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