PS-3215 wireless colorimetry/turbidity sensor
The PS-3215 wireless colorimeter/turbidity sensor simultaneously measures absorbance and transmittance at six different wavelengths. It can be used to study Beer's law (absorbance versus concentration), enzyme activity, photosynthesis, and chemical reaction rates (absorbance versus time). It also serves as a high-quality turbidimeter for water-quality analysis. After simple calibration, students can quickly view real-time measurements at six visible wavelengths: 650nm (red), 600nm (orange), 570 nm (yellow), 550 nm (green), 500 nm (blue), and 450 nm (violet). Rather than only measuring transmitted light, the wireless colorimeter and turbidity sensor measures light scattered by the sample at 90 degrees for accurate, repeatable measurements. Its opaque cuvette compartment also reduces ambient-light interference to ensure measurement accuracy. Turbidity measurements require a cuvette with four clear sides. If a cuvette with two clear sides is used, at least orient a clear side toward the turbidity-measurement light source. When used with our ezSample snap-type sample vials for water-quality testing, built-in calibration curves for ammonia, nitrate, phosphate, chlorine, and iron determine chemical concentrations, displayed in ppm or g/L. These chemical tests follow the United States Geological Survey (USGS) field procedures for ion testing. See the Buying Guide tab for ezSample snap-type sample vials. Absorbance and transmittance measurement: Light from a broadband white LED passes through the solution onto a charge-coupled-device (CCD) array, where it is detected and analyzed. Parts of the array have narrowband filters that pass only six visible wavelengths—violet, blue, green, yellow, orange, and red—to the detector. Absorbance can be plotted against concentration as a Beer's-law curve or against time for kinetics studies. Turbidity measurement uses a collimated light source perpendicular to the sensor. Important: Solutions used in the colorimeter must be compatible with polystyrene, the cuvette material, and ABS plastic, the instrument-housing material. Solutions containing strong organic solvents such as acetone require glass cuvettes or 12-millimeter test tubes, because strong organic solvents damage plastic cuvettes. WARNING! This product may cause cancer and reproductive harm. For more information, visit www.P65Warnings.ca.gov. Note: This warning meets the requirements of California's Safe Drinking Water and Toxic Enforcement Act (Prop 65), indicating that the product may contain chemicals with potential health risks.
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Overview
Specifications
| Parameter | Value |
|---|---|
| Color detection / Characteristic wavelength | 650 nm (red), 600 nm (orange), 570 nm (yellow), 550 nm (green), 500 nm (blue), 450 nm (violet) |
| Detection Wavelength Range [Characteristic wavelength] | Characteristic wavelength ±25 nm |
| Absorbance - Measurement range | 0-3 Abs |
| Absorbance - Effective measurement range | 0.05-1.5 Abs |
| Transmittance | 0-100% |
| Turbidity - Illumination wavelength | 850 nm |
| Turbidity - Measurement range | 0-400 NTU |
| Turbidity - Accuracy | ±5% NTU |
| Connection Method | USB and Bluetooth 5.2 |
| Data Logging Function | Supported |
| Battery Type | Rechargeable Lithium-Polymer Battery (LiPo) |
| Stored-data-point memory (data logging)¹ [Refers to the Minimum Number of Data Points When All Measurement Functions Are Enabled; Actual Results Depend on the Enabled Measurement Functions.] | More than 15,000 |
| Battery Runtime - Connected State (Data Acquisition Mode)² [Refers to Continuous Use While Connected Until the Battery Is Exhausted; Actual Results Depend on the Sampling Rate, Activated Measurement Functions, and Battery Condition.] | More than 80 hours |
| Battery runtime - Logging state (data-logging mode)³ [Refers to Recording Data Until the Battery Is Exhausted; Actual Results Depend on the Sampling Rate, Activated Measurement Functions, and Battery Condition.] | 3 days |
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Datasheet
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