This sensor can function as a turbidimeter or colorimeter and is capable of measuring absorbance and transmittance at six different wavelengths.
- 1x USB charging cable
- 9x Cuvettes and Caps
- 2x Cuvette Rack
- 1x 100 NTU Calibration Cuvette
See the Buying Guide for this item's required, recommended, and additional accessories.
The Wireless Colorimeter simultaneously measures the absorbance and transmittance of six different wavelengths. The sensor can be used to study Beer's Law (absorbance vs. concentration), enzyme activity, photosynthesis, and the rates of chemical reactions (absorbance vs. time). After a simple calibration, students can quickly begin viewing live measurements as they materialize across the visible spectrum at 650 nm (red), 600 nm (orange), 570 nm (yellow), 550 nm (green), 500 nm (blue), and 450 nm (violet).
This sensor also functions as a high-quality turbidimeter for water quality analysis. Rather than simply measuring transmitted light, the Wireless Colorimeter and Turbidity Sensor measures light scattered at a 90 degree angle from the sample, resulting in accurate and repeatable measurements. Additionally, the internal housing for the cuvette is opaque, which limits ambient light interference to preserve accuracy.
- Stabilized light source for consistent readings
- Measures six different wavelengths simultaneously
- PASCO software displays the absorbance & transmittance at each wavelength in the appropriate color
- Quick and easy calibration
- Functions as both a colorimeter and turbidimeter
- Wireless design enables data collection in the field
- Beer's Law (absorbance vs. concentration)
- Measuring reaction rates using absorbance vs. time
- Turbidity testing and colorimetric analysis in the field
- Determining the concentration of an unknown solution
- Comparing the turbidity of water samples
How It Works
Absorbance and Transmittance: Light from a broad band white LED light source passes through the solution onto a CCD array which detects the light and analyzes it. Parts of the array are covered by narrow band filters which allow 6 of the visible wavelengths (Violet, blue, green, yellow, orange, and red) through to the detector. The absorption can be plotted as a function of concentrations to form Beer's law plots or absorption over time graphed for kinetics investigations. A collimated light source directed perpendicular to the sensor can be used for turbidity.
Important Note: Solutions used within this spectrometer should be compatible with polystyrene (cuvette material) and ABS (spectrometer housing material). Use a glass cuvette or 12mm test tube for solutions with strong organic solvents like acetone, which will damage the plastic cuvettes.
Cancer & Reproductive Harm. For more information, see www.P65Warnings.ca.gov.
|Color detection/peak wavelengths||650 nm (red), 600 nm (orange), 570 nm (yellow), 550 nm (green), 500 nm (blue), 450 nm (violet)|
|Detector ranges||±25 nm from peak|
|Absorbance||0-3 Abs units; useful range (0.05-1.5 Abs)|
|Turbidity range||0-400 NTU|
Battery & Logging
|Stored Data Points Memory (Logging) 1||>15,000|
|Battery - Connected (Data Collection Mode) 2||>80 hr|
|Battery - Logging (Data Logging Mode) 3||3 days|
1 Minimum # of data points with all measurements enabled, actual results depend on enabled measurements.
2 Continuous use in a connected state until battery failure, actual results will depend on sample rate, active measurements, and battery condition.
3 Logging until battery failure, actual results will depend on sample rate, active measurements, and battery condition.
* Normal classroom use is the sensor in active use for 20min/lab for 120 lab periods/yr.
This product requires PASCO software for data collection and analysis. We recommend the following option(s). For more information on which is right for your classroom, see our Software Comparison: SPARKvue vs. Capstone »
This product can connect directly to your computer or device with the following technologies. No Interface required. See the following guide for details regarding device compatibility: Wireless Bluetooth Product Compatibility »
- Bluetooth Low Energy (BLE)
- Universal Serial Bus (USB)
Dedicated Datalogging with SPARK LXi
Consider an all-in-one, touchscreen data collection, graphing, and analysis tool for students. Designed for use with wired and wireless sensors, the SPARK LXi Datalogger simultaneously accommodates up to five wireless sensors and includes two ports for blue PASPORT sensors. It features an interactive, icon-based user interface within a shock-absorbing case and arrives packaged with SPARKvue, MatchGraph!, and Spectrometry software for interactive data collection and analysis. It can additionally connect via Bluetooth to the following interfaces: AirLink, SPARKlink Air, and 550 Universal Interface.
|Cuvettes and Caps||SE-8739||$24|
|100 NTU Calibration Cuvette||SC-3512||$20|
|Wireless Sensor Charging Station||PS-3599||$99|
|USB Bluetooth Adapter||PS-3500||$14|
Lab Activities & Experiments
|Experiment 01 - Solution Concentrations||1.06 MB|
|Experiment 02 - Colored Solutions||939.25 KB|
|Experiment 03 - Project: Design a Purification Process||295.35 KB|
|Experiment 04 - Chlorophyll Extraction||1.63 MB|
|Experiment 05 - The Water Cycle||907.08 KB|
Perform the following experiments and more with the Wireless Colorimeter & Turbidity Sensor.
Visit PASCO's Experiment Library to view more activities.
In this lab, students will measure the pH, conductivity, and absorbance of a model cell containing a semi-permeable membrane to better understand cell regulation.
Students analyze spinach pigments and chloroplasts using paper chromatography, a colorimeter, and a spectrometer to understand how plants capture light for photosynthesis.
In this lab, students use a variety of sensors to explore the use of terrariums as a closed system for environmental studies and design methods for exploring the interrelationships of biotic and abiotic variables within ecosystems.
Students use a colorimeter to quantify the amount of food dye in a sports drink.
Students use a colorimeter to construct a calibration curve of known solution concentrations and determine the unknown concentration of a solution (Beer’s law).
Students determine the reaction order of crystal violet fading in the presence of sodium hydroxide.