Wireless Colorimeter And Turbidity Sensor - PS-3215


The Wireless Colorimeter and Turbidity allows students to set up in seconds and collect measurements with ease.


The Wireless Colorimeter and Turbidity Sensor simultaneously measures the absorbance and transmittance of six different wavelengths. Each wavelength represents a region of the ROYGBIV color wheel and can be displayed graphically using PASCO software. 

The colorimeter can be used to study concentrations of solutions, the rates of chemical reactions and more. The Wireless Colorimeter and Turbidity Sensor is also resistant to splashes and spills, ensuring years of use in labs. It was also designed to draw minimal amounts of power which gives it a long battery life and reduces how often it needs to be recharged. Calibration is also fast and easy, eliminating wasted time during the lab activity.

Additionally, this sensor functions as a high quality turbidimeter for water quality analysis. Rather than simply measure transmitted light, the Wireless Colorimeter and Turbidity Sensor uses the industry standard method of using light scattered by a sample at 90 degrees resulting in more accurate and repeatable measurements. The internal housing where the cuvette is placed is also opaque to limit ambient light and assure data accuracy.

With the wireless, rugged design, this instrument is ideal for use in the field as well as in the lab.

Typical Applications

  • Study absorbance vs concentration
  • Determine the concentration of an unknown solution (Beer's Law experiments)
  • Measure reaction rates
  • Compare the turbidity of water samples from various field locations
  • Measure the rate of settling of a sample
  • Measure the formation of a precipitate

Special Features

  • Stabilized light source for consistent readings
  • Able to measure six different wavelengths simultaneously
  • "Smart colors" in PASCO software display the absorbance & transmittance at each wavelength in a very visual way.
  • Quick and easy calibration
  • A colorimeter and turbidimeter together for one low price.

Bluetooth Low Energy Wireless Connectivity

Required Software:

PASCO products that use Bluetooth® Low Energy connectivity (wireless sensors, Smart Carts, and the AirLink) require the latest versions of our software.

PASCO Capstone is available for Mac and Windows. SPARKvue is available for Mac, Windows, iOS, Android and Chromebooks.

Additionally, the Wireless Motion Sensor and Wireless Smart Carts can be connected via Bluetooth and used with our MatchGraph app.

Compatibility/System Requirements

Any current model Chromebook, Mac, iPad, iPhone, Android tablet or phone will support direct connection to PASCO Bluetooth Low Energy devices. Also, any Windows 10 device with Creators Edition 1703 or later will support direct connection.

Chromebook users MUST have the latest firmware updates for ALL wireless sensors in order to use them without the USB Bluetooth Adapter. Full information.

All other Windows computers/tablets, older Macs, and Chromebooks without updated sensor firmware currently require the PS‑3500 USB Bluetooth Adapter to connect to PASCO’s Bluetooth Low Energy devices.

Full compatibility details are available, including compatibility information for older computing devices.


New Storage Option

Simplify storage & inventory

Custom Gratnells Tray for Wireless Colorimeter and Turbidity Sensors (PS-3587)

The precision cut inserts are designed to accommodate up to 10 Wireless Colorimeter and Turbidity Sensors

See the buying guide below for details


  • Colorimeter/Turbidimeter
  • USB charging cable
  • 6 colorimetry cuvettes (2 clear sides and two ribbed sides)
  • 4 turbidity cuvettes (4 clear sides)
  • 2 cuvette racks
  • Calibration cuvette and 100 NTU solution
  • Specifications

    Color detection/peak wavelengths
    • 650 nm (red)
    • 600 nm (orange)
    • 570 nm (yellow)
    • 550 nm (green)
    • 500 nm (blue)
    • 450 nm (violet)
    Colorimeter Detector Ranges
    • 40 nm FWHM for each wavelength
    Colorimeter Absorbance
    • 0 - 3 Abs units
    • Useful range of 0.05 - 1.5 Abs
    • 0 - 100%
    • Useful range of 3% to 90%
    Colorimeter Precision
    • ± 0.03 Absorbance units
    Turbidity Range
    • 0 - 400 NTU
    Turbidity Accuracy
    • ± 5% NTU

    Buying Guide

    USB Bluetooth Adapter

    Windows devices, Chromebooks and older Macs lack native Bluetooth® Smart support and require an adapter to use PASCO wireless products.

    All current model Macs, iPads, iPhones, Android tablets or phones support direct connection to PASCO Bluetooth Smart devices and do not require the adapter.

    Full compatibility details are available.

    USB Bluetooth Adapter   PS-3500
    Cuvettes and Caps
    Replacement Parts
    Cuvettes and Caps   SE-8739

    Software Required

    SPARKvue software or PASCO Capstone software may be used. PASCO Capstone is available for Mac and Windows. SPARKvue is available for Mac, Windows, iOS, Android and Chromebooks.

    Learn more about Bluetooth Compatibility.