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| Brand | Hach |
|---|---|
| Origin | USA |
| Model | 2100N |
| Product Type | Benchtop / Laboratory |
| Measurement Range | 0–4000 NTU |
| Resolution | 0.001 NTU |
| Operating Temperature | 10–40 °C |
| Accuracy | ±2% (0–1000 NTU), ±5% (1000–4000 NTU) |
| Power Supply | 230 V, 50/60 Hz |
| Relative Humidity | ≤90% RH (non-condensing at 25 °C) |
| Sample Volume | ≥20 mL |
| Measurement Modes | NTU, NEP, EBC |
| Ratio Measurement | Yes |
| Data Storage | Internal memory with HachLink™ software export capability |
| Brand | Hanna Instruments |
|---|---|
| Origin | Italy |
| Model | HI 93703-11 |
| Type | Portable Turbidimeter |
| Measurement Range | 0.00–50.00 FTU (NTU) and 50–1000 FTU (NTU) |
| Resolution | 0.01 FTU (NTU) |
| Accuracy | ±5% of reading or ±0.5 FTU (NTU), whichever is greater |
| Light Source | 890 nm infrared LED |
| Operating Temperature | 0 to 50.0 °C |
| Relative Humidity | up to 95% RH |
| Dimensions | 220 × 82 × 66 mm |
| Weight | 510 g |
| Data Storage | 200 measurement records |
| Calibration | Automatic 3-point calibration (0, 10, 500 FTU) |
| GLP Compliance | Timestamped calibration history and real-time clock |
| Interface | RS232 serial port |
| Power Supply | 4 × 1.5 V AA batteries |
| Brand | Truelab |
|---|---|
| Origin | Shanghai, China |
| Model Series | WGZ-1 / WGZ-200 / WGZ-800 |
| Instrument Type | Portable turbidimeter |
| Measurement Principle | 90° scattered light detection (ISO 7027 compliant) |
| Measurement Range | WGZ-1: 0–100 NTU & 0–200 NTU |
| WGZ-200 | 0–20 NTU & 0–200 NTU |
| WGZ-800 | 0–200 NTU & 0–800 NTU |
| Minimum Readout | WGZ-1: 0.1 NTU |
| WGZ-200 | 0.01 NTU |
| WGZ-800 | 0.1 NTU |
| Basic Error | ±2.5% F.S. (WGZ-1) |
| Repeatability | ≤1% |
| Zero Drift | ±0.5% F.S. (equivalent to ±0.2 NTU for WGZ-1/WGZ-800 |
| Operating Temperature | 0–25 °C |
| Resolution | 0.2 NTU (typical display resolution across series) |
| Key | Brand: Truelab |
|---|---|
| Origin | Shanghai, China |
| Model Series | WGZ-200A, WGZ-2A, WGZ-2, WGZ-3, WGZ-3A, WGZ-100 |
| Type | Portable Turbidimeter |
| Measurement Principle | 90° Nephelometric Scattering |
| Range | 0–1000 NTU (model-dependent) |
| Resolution | 0.001–0.01 NTU |
| Accuracy | ±2% F.S. |
| Repeatability | ≤1% |
| Zero Drift | ±0.5% F.S. (at 0.02–0.1 NTU) |
| Operating Temperature | 25 °C ambient |
| Compliance | ISO 7027, ASTM D6508, USP <241>, GLP-ready architecture |
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