Benchtop Turbidimeter ST 300
The ST 300 is a benchtop turbidity, chlorine and color meter with wide range and high accuracy. The ST 300 meets ISO 7027 standards for turbidity, follows standard methods 4500-CI-G for chlorine and Standard Methods 2120-C for color. The ST 300 meter meets EPA 180.1 for turbidity and EPA 330.5 for chlorine and follows standard methods 2120-C for color. The turbidity range is 0 to 4000 NTU with a MDL of 0.05 NTU. The free and total chlorine range is 0 to 10 ppm with a MDL of 0.03 ppm. The meter can store 500 data points which can be downloaded to a computer. Features 7 different languages, and runs on rechargeable batteries or a USB computer/wall adaptor.
Specification :
| Turbidity | |
| Unit of Measure: | NTU, FNU, AU, FAU, ASBC, EBC |
| Range: | 0 to 4000, 0 to 10,500 ASBC, 0 to 150 EBC |
| Resolution: | 0.01 NTU/FNU 0.00 to 10.99, 0.1 NTU/FNU 11.0 to 109.9, 1 |
| Accuracy: | |
| 0 to 2.5 NTU/FNU: | ±0.05 NTU/FNU |
| 2.5 to 100 NTU/FNU: | ±2% |
| Above 100 NTU/FNU: | ±3% |
| Detection Limit: | 0.05 NTU/FNU |
| Range Selection: | Automatic |
| Reproducibility: | 0.02 NTU/FNU, or 1% Over 600 NTU/FNU units expressed as AU/FAU. |
| Light Source: | Tungsten (EPA), complie 9 with EPA 180.1, 860 mm LED (ISO), complies with ISO 7027 |
| Chlorine | |
| Range: | 0 to 10 ppm |
| Free and Total Chlorine Resolution: | 0.00 to 5.00 ppm |
| Range: | 0.01 ppm 5.0 to 10.0 ppm |
| Range: | 0.1 ppm |
| Accuracy Tablet Ranges: | |
| 0 to 1.0 ppm: | ±0.03 ppm |
| 1.0 to 3.0 ppm: | ±0.06 ppm |
| 3.0 to 6.0 ppm: | ±0.3 ppm |
| 6.0 to 10.0 ppm: | ±2.5 ppm |
| Liquid Ranges: | |
| 0 to 0.5 ppm: | ±0.03 ppm |
| 0.6 to 3.0 ppm: | ±0.06 ppm |
| 3.0 to 6.0 ppm: | ±0.4 ppm |
| 6.0 to 10.0 ppm: | ±1.5 ppm |
| Detection Limit: | 0.03 ppm |
| Response Time: | <2 seconds |
| Light Source: | 525 nm LED, complies with EPA 330.5 Color |
| Range: | 0 to 1000 cu |
| Detection Limit: | 20 cu |
| Accuracy: | ±15 cu |
| Light Source: | 428 nm LED Meter |
| Signal Averaging Disabled: | 2, 5, 10 min |
| Power: | USB computer cable, wall adaptor or lithium ion rechargeable battery (included), 3.7V, 2.5 x 0.75″, 1.7 oz |
| Data Logging: | 500 points |
| Auto Shut-Off Disabled: | 5, 10, 30 minutes |
| Languages: | English, French, Spanish, Japanese, Italian, Portuguese, and Chinese |
| Response Time: | <2 seconds |
| Dimensions: | 22.2 W x 19.7 L x 7.6 cm D (8.75 x 7.75 x 3″) |
| Meter Weight: | 680 g (1.5 lb) |
| Ship Weight: | 2.72 kg (6 lb) |
Accurate, Reliable Turbidity Measurement for Water Quality Assurance
Benchtop Turbidimeter ST 300 ensure compliance and protect public health with our range of turbidimeters—precision instruments designed to measure the cloudiness or haze in water caused by suspended particles. Essential for drinking water treatment, wastewater monitoring, environmental testing, and industrial process control, our turbidimeters deliver fast, repeatable results in compliance with EPA Method 180.1, ISO 7027, and USEPA GLI standards.
Engineered for Clarity and Compliance
Our turbidimeters utilize either nephelometric (90° scatter) or ratio (multi-angle) optical technology to detect particles as small as 0.1 µm, providing accurate readings from 0.01 to 1,000 NTU/FNU. Designed for both lab and field use, models range from portable handheld units to benchtop and online process analyzers—each built for stability, ease of use, and minimal maintenance.
- Compliant with EPA 180.1 & ISO 7027 – Choose infrared (ISO) or white light (EPA) optics based on regulatory needs.
- Wide Measurement Range – From ultra-low turbidity in drinking water (<0.1 NTU) to high-solids wastewater.
- Automatic Calibration & Diagnostics – One-button calibration with standards; alerts for bubbles, fouling, or lamp errors.
- Durable Designs – IP67-rated portables for field use; rugged benchtops for daily lab analysis.
- Data Management – GLP-compliant logging, timestamped results, and USB/Bluetooth export on select models.
- Low Maintenance & Long Lamp Life – LED light sources ensure stability and reduce consumable costs.
Trusted Across Water and Environmental Sectors
From municipal water plants verifying filter performance to environmental consultants assessing stormwater runoff, our turbidimeters support regulatory reporting, process optimization, and early contamination detection. Their intuitive interfaces require minimal training, while high repeatability ensures confidence in every reading.
Whether you need spot-check capability or continuous monitoring, our turbidimeters provide the accuracy, reliability, and compliance assurance your water quality program depends on.
See clearly. Measure confidently. Protect water integrity.
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