Success flash icon

Error flash icon

This campaign is no longer active and has not been relisted.

Ion Specific Electrode Probe Interface

Ion Specific Electrode Probe Interface


36% Funded
36% Funded
8 Backers
25 Unit Target
Ends 5 Days After Target

+ shipping

9 reserved of 25 Minimum
Campaign Created

Campaign Created

Campaign Reached Goal

Campaign Reached Goal

Campaign Closed

Campaign Closed

Shipping to GroupGets

Shipping to GroupGets

GroupGets Received

GroupGets Received

GroupGets Testing

GroupGets Testing

GroupGets Testing Complete

GroupGets Testing Complete

Shipping to Customers

Shipping to Customers

Product Details

Ion Specific Electrode Probe Interface
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 GroupGet?

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

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

Shipping Details
GroupGets will handle the shipment of orders for this product.

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.


How it works

This is a group buy campaign that needs to acquire at least the stated minimum amount of pledges from backers like you before the Unit Deliverable and any Add-Ons ship. We do not charge anyone until the Progress above hits 100% or greater, otherwise there is no charge. All campaign products are vetted as existing and functional so your order will be fulfilled within the Factory Lead Time if the campaign succeeds. Please see our FAQ page for more details on our billing process.

  • 434924?v=4

    I have just created the GroupGet for Ion Specific Electrode Probe Interface!