Tentacle Shield for Arduino

Rated 5.00 out of 5 based on 3 customer ratings
(4 customer reviews)

$ 105.38$ 115.62

An arduino shield to host and individually isolate up to 4 sensor circuits from Atlas Scientific to measure PH, Dissolved Oxygen, Electric Conductivity (E.C.) and Oxidation-Reduction Potential (ORP).

Please select:

  • kit: The Arduino pin headers are included, but not soldered. You can solder the included headers or use your custom connectors
  • assembled: the Tentacle ships fully assembled and ready to use
SKU: T1 Category:


Tentacle is an Arduino shield to host up to 4 sensor circuits from Atlas Scientific to measure PH, Dissolved Oxygen, Electric Conductivity (E.C.) and Oxidation-Reduction Potential (ORP) and temperature (RTD). The sensor circuits are not included. Works with current and all previous versions of these Atlas Scientific sensor circuits: PH, EC, DO, ORP, RTD

Easy Setup

Use the setup sketch to easily set up your circuits interactively. It even comes with circuit auto-detection!


The Tentacle shield is COMPATIBLE with all 5V-tolerant Arduinos (Uno, Mega, Yun, & many more). The Tentacle shield is not compatible with Arduinos that can’t tolerate 5V on their I/O pins (Zero, Due, etc). If you need 3.3V compatibility, the Tentacle Mini is for you.

  • stack 2 shields to get 8 isolated sensor channels
  • I2C and UART compatible


Individually isolated measurement circuits and communication lines prevent noise and ground loops for precise measurements even in closed-loop systems. Read our blog post Atlas circuit isolation, noise & crosstalk tests for more details on the isolation of sensor circuits.

On-board Serial Multiplexer

With the on-board serial multiplexer you can use up to 4 circuits in UART mode per shield – using just 4 pins of your Arduino!

Stack two tentacles to get 8 serial channels.

Arduino-style simplicity

Extra long pin headers to stack multiple tentacle (or other) shields on your Arduino hassle-free. On-Board reset-button to reset your Arduino without removing shields. Includes a mounting kit with plastic standoffs.

Additional information

Weight 0.130 kg
Dimensions 15.5 × 9 × 3.8 cm
Shield headers

assembled, kit


Whitebox Labs

Open Source


4 reviews for Tentacle Shield for Arduino

  1. Rated 5 out of 5

    Eric Burger

    Great Shield! Very easy to use and to customize to a project. Also, the whitebox example code is really good. I wouldn’t recommend getting any of the sensors without also getting this shield. The readings from my pH sensor were useless until I added the tentacle shield.

  2. Ferry (verified owner)

    Great shield. Even for me as a starter in electronics and programming!

  3. Rated 5 out of 5

    Tarik Chrigui (verified owner)

    Great shield, Perfect Customer Service arrived on time. Thank you.

  4. Rated 5 out of 5

    Anthony Genovese

    So easy to work with! Awesome product!

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