Open Colorimeter Product Line Overview

There are currently four variants of the Open Colorimeter available. All of the Open Colorimeter variants use an Adafruit PyBadge and the same 3D printed enclosure. The main difference between the variants is the type and position of the light sensor and the CircuitPython firmware.

We have designed the Open Colorimeter variants to be easily customizable for many different applications. We have developed a wide-selection of LED light sources in the UV, visible and IR spectrum which will work with any of the variants.

As most of the components are easily exchanged, there are also options to use the same hardware in different configurations or applications. For example, the Open Colorimeter can be easily converted to a multichannel or UV colorimeter simply by swapping the light source and sensor board. The Open Colorimeter Plus has a dual light-sensor holder tube holder design, but can also be easily added to any of the other variants.

When changing hardware between variants, you also will need to program with the correct firmware. This page explains how to reprogram your device with different Open Colorimeter firmware: https://blog.iorodeo.com/installing-upgrading-the-firmware/

An overview of each device highlighting differences and applications is below.

Open Colorimeter

• Product Page: https://iorodeo.com/products/open-colorimeter
• Light Sensor: TSL2591 High Dynamic Range Digital Light Sensor
• Sensor Overview: Highly sensitive, broad-range visible-IR light sensor
• LED: Ships with LED wavelength of choice
• LED Options: Works with any of our visible-IR LEDs. Currently we have over 10 wavelength options available
• Firmware: https://github.com/iorodeo/open_colorimeter_firmware
• Example Applications: Colorimetric assays

Multichannel Open Colorimeter

• Product Page: https://iorodeo.com/products/multichannel-colorimeter
• Light Sensor: AS7341 10-Channel Light Sensor
• Sensor Overview: 10 fixed channels including 8 visible light channels, 1 IR channel and a clear channel. Less sensitive than the TSL2591
• LED: Ships with a white LED board
• Firmware: https://github.com/iorodeo/multichan_colorimeter_firmware
• Example Application: Colorimetric assays where you want to examine absorbance across multiple wavelengths at the same time.

UV Open Colorimeter

• Product Page: https://iorodeo.com/products/uv-open-colorimeter
• Light Sensor: AS7331 UV Sensor
• Sensor Overview: 3 channels for measuring UV-A, UV-B and UV-C. We also developed a Python library for this sensor. More information about the sensor in this post.
• LED Options: Works with any of our UV LEDs
• Firmware: https://github.com/iorodeo/uv_photometer_firmware
• Example Application: Protein quantification by absorbance at 280nm

Open Colorimeter Plus

• Product Page: In development
• Light Sensors: Two TSL2591 light sensors
• Sensor Overview: Light measurements with a 90° right-angled light sensor. Additional light sensor at 180° for normalization and absorbance measurements
• LED Options: Radial LED boards are recommended for fluorescence and turbidity measurements.
• Firmware: In development.
• Prototype Firmware:
• Example Application: Turbidity & fluorescence measurements e.g. DNA quantification assays

Open Colorimeter Product Guide

Documentation site for the Open Colorimeter, Multi-Channel Colorimeter, UV Open Colorimeter & Open Colorimeter Plus

Product Guide Home Page