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| Brand | Hach |
|---|---|
| Origin | USA |
| Model | 2100Q |
| Measurement Range | 0–1000 NTU |
| Accuracy | ±2% of reading + stray light contribution |
| Stray Light | < 0.02 NTU (FNU) |
| Resolution | 0.01 NTU at lowest range |
| Calibration Options | Single-point RapidCal (0–40 NTU), Full-range (0–1000 NTU), and Turbidity-to-TSS correlation (0–100 mg/L) |
| Data Storage | Up to 500 measurements with timestamp, operator ID, sample ID, calibration status, and error logs |
| Compliance | 2100Q complies with USEPA Method 180.1 |
| Signal Averaging | User-selectable On/Off |
| Measurement Modes | Normal, Signal-Averaged, Rapid-Settling Turbidity (RST) |
| Display Guidance | On-screen calibration & verification prompts |
| Data Transfer | USB + power module (no additional software required) |
| Brand | Hach |
|---|---|
| Origin | USA |
| Manufacturer Type | Authorized Distributor |
| Product Origin | Imported |
| Model | 2100N |
| Price | Upon Request |
| Range | 0–4000 NTU |
| Accuracy | ±2% of reading (0–1000 NTU), ±5% of reading (1000–4000 NTU) |
| Resolution | 0.001 NTU |
| Minimum Sample Volume | 20 mL |
| Measurement Modes | NTU, NEP, EBC |
| Ratio Measurement | Yes |
| Signal Averaging | Programmable |
| Sample Chamber Purge | Compressed air compatible |
| Operating Environment | 10–40 °C, ≤90% RH (non-condensing at 25 °C) |
| Power Supply | 230 V, 50/60 Hz |
| Brand | ATAGO |
|---|---|
| Origin | Japan |
| Model Series | MASTER |
| IP Rating | IP65 (α, H, T series) |
| Temperature Compensation | Automatic (α, T, H series) |
| Sample Volume | 2–3 drops |
| Prism Cleaning | Rinseable with flowing water |
| Ergonomic Design | Antimicrobial textured grip |
| Compliance | Conforms to JIS Z 8807 (Refractometry), ISO 21748 (Reference materials for refractometer calibration) |
| Measurement Principle | Critical angle of total internal reflection through high-precision optical prism |
| Brand | TES |
|---|---|
| Origin | Taiwan |
| Model | TES-1339 |
| Measurement Range | 0.01–999,900 Lux (5 auto-ranging scales) |
| Resolution | 0.01 Lux / 0.001 fc |
| Accuracy | ±3% of reading ±5 digits (calibrated at 2856 K standard incandescent source) |
| Response Time | ~5 readings/sec |
| Photodetector | Silicon photodiode with cosine-corrected diffuser |
| Memory Capacity | 50 data sets |
| Operating Temp | 0–50°C, <80% RH |
| Power | 6× AAA batteries (~100 h life) |
| Sensor Cable Length | 150 cm |
| Dimensions (Meter) | 150 × 72 × 33 mm |
| Weight | ~250 g |
| Compliance | CNS 5119 Class II |
| Brand | Hach |
|---|---|
| Origin | USA |
| Model | 1900C |
| Measurement Principle | Nephelometric (90° light scattering) per USEPA Method 180.1 |
| Range | 0–1000 NTU (auto-ranging) |
| or manual ranges | 0–9.99 / 0–99.9 / 0–1000 NTU |
| Resolution | 0.01 NTU (at lowest range) |
| Accuracy | ±1% linearity error |
| Repeatability | ≤1% (0–1000 NTU) |
| Zero Drift | ±1.5% F.S. |
| Stability | ±1.5% F.S. |
| Power | 4 × AA alkaline batteries or optional AC adapter |
| Operating Temperature | 0–50 °C |
| Weight | 520 g |
| Compliance | Fully compliant with USEPA Method 180.1 |
| Optical System | Dual-detector ratiometric optical design with signal averaging |
| Brand | Hach |
|---|---|
| Origin | USA |
| Model | 2100AN |
| Measurement Principle | Nephelometric (90° light scattering) with dual-detector ratio mode |
| Turbidity Range | 0–10,000 NTU |
| Color Range | 0–500 CU |
| Accuracy | ±2% of reading (0–1000 NTU), ±5% (1000–4000 NTU), ±10% (4000–10,000 NTU) |
| Resolution | 0.001 NTU / 1 CU |
| Repeatability | ±1% of reading or 0.01 NTU |
| Minimum Sample Volume | 20 mL |
| Compliance | EPA Method 180.1 |
| Operating Environment | 10–40 °C, ≤90% RH (non-condensing at 25 °C) |
| Power Supply | 230 V, 50/60 Hz |
| Weight | 3.43 kg |
| Data Output | Built-in thermal printer, USB interface for HachLink™ software |
| Sample Chamber Purge | Compressed air port for dew prevention |
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