Total Nitrogen Analyzer
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| Brand | AOE |
|---|---|
| Origin | Shanghai, China |
| Model | WA650 |
| Wavelength Range | 190–1100 nm |
| Wavelength Accuracy | ±0.5 nm |
| Photometric Accuracy (Transmittance) | <0.5% T |
| Photometric Repeatability (Transmittance) | <0.2% T |
| Stray Light | <0.05% T |
| Optical Stability | ±0.002 A/h |
| Measured Parameters | Total Nitrogen (TN), Total Phosphorus (TP), Ammonia-Nitrogen (NH₃-N), Chemical Oxygen Demand (COD) |
| Measurement Ranges | TN: 2–15,000 mg/L |
| TP | 1–10 mg/L |
| NH₃-N | 0.01–30 mg/L |
| COD | 0.02–100 mg/L |
| Measurement Time | TN: 50 min |
| TP | 40 min |
| NH₃-N | 15 min |
| COD | 20 min |
| Measurement Error | TN: <±8% |
| TP | <±5% |
| NH₃-N | <±5% |
| COD | <±5% |
| Batch Capacity | TN/TP/COD: up to 16 samples (expandable) |
| NH₃-N | up to 20 samples (expandable) |
| Digestion Temperature Control | TN: 122°C ±0.5°C |
| TP | 120°C ±0.5°C |
| COD | 165°C ±0.5°C |
| Digestion Time | TN: 40 min |
| TP | 30 min |
| NH₃-N | 10 min |
| COD | 10 min |
| Digestion Mode | Sealed for TN & TP |
| Preloaded Calibration Curves | 200 sets |
| Data Storage Capacity | 40,000 test records |
| Standard Accessories | Reagent kits, 16-position intelligent digester, optional cuvettes (1 cm / 2 cm / 3 cm) |
| Brand | Chemins |
|---|---|
| Origin | Zhejiang, China |
| Manufacturer Type | OEM Manufacturer |
| Model | TN-300C |
| Pricing | Upon Request |
| Brand | DELEITE |
|---|---|
| Origin | Shanghai, China |
| Model | NQT-100i |
| Measurement Method | Alkaline Potassium Persulfate Digestion + UV Spectrophotometry |
| Range | Total Nitrogen 0–100 mg/L |
| Accuracy | ±2% of reading |
| Repeatability | ±1% |
| Wavelength Range | 190–1000 nm |
| Light Source Lifetime | 100,000 hours |
| Photometric Stability | ≤0.001 A/20 min |
| Display | 10-inch Touchscreen Tablet |
| Dimensions | 460 × 320 × 165 mm |
| Weight | 5.5 kg |
| Operating Environment | 5–35 °C, ≤85% RH |
| Brand | DoctorWater |
|---|---|
| Origin | Hunan, China |
| Model | Dr-T9904 |
| Measurement Method | Photometric (UV-Vis Spectrophotometry) |
| Range | 0–100 mg/L TN |
| Accuracy | ≤ ±5% |
| Detection Limit | 0 mg/L (as reported |
| Resolution | 0.001 Abs |
| Wavelength Range | 340–900 nm |
| Wavelength Accuracy | ±1 nm |
| Wavelength Repeatability | <0.2 nm |
| Spectral Bandwidth | 4 nm |
| Transmittance Error | ±0.5% |
| Transmittance Repeatability | ≤0.2% T |
| Optical Stability | ≤±0.005 Abs/20 min |
| Light Source | Imported Cold LED (Lifespan >100,000 h) |
| Display | 8-inch HD Capacitive Touchscreen |
| Sample Holders | Rotatable Cuvette Holder (360°), Dual Cuvette Positions (10 mm & 30 mm pathlength), 4 Independent Digital Electrode Ports |
| Calibration | Single- and Multi-point Standard Curve Generation |
| Preloaded Curves | 1,000 Method-Specific Calibration Curves |
| Data Storage | 1,000,000 Records with Timestamp, Operator ID, and Batch Traceability |
| Output | Thermal Printer, USB Export (CSV), On-screen Graphing & Filtering |
| Housing | Corrosion-Resistant ABS Enclosure |
| Dimensions | 392 × 315 × 170 mm |
| Weight | 4.4 kg |
| Brand | Environmental Express |
|---|---|
| Origin | USA |
| Model | HotBlock® TKN Series |
| Temperature Range | Ambient to 450°C |
| Configurations | 28-position or 54-position |
| Heating Block Material | 316 Stainless Steel |
| Controller Type | Optional Advanced Touchscreen (up to 8 preloaded methods, 20-step programmable ramping) |
| Power Supply | 240 VAC, 50/60 Hz |
| Compliance | Designed for ASTM D5179, EPA 351.2, ISO 11905-1, and USP <467> residual nitrogen workflows |
| Sample Tube Compatibility | Standard threaded digestion tubes compatible with SimpleDist® distillation systems |
| Safety Design | Controller mounted externally to fume hood |
| Brand | Horde Electric |
|---|---|
| Origin | Shandong, China |
| Manufacturer Type | Authorized Distributor |
| Country of Origin | China |
| Model | HD-BTN |
| Price | USD 1,780 (FOB) |
| Measurement Method | Chromotropic Acid Spectrophotometry |
| Range | 0.5–200 mg/L |
| Resolution | 0.001 mg/L |
| Brand | Leichi |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Country of Origin | China |
| Model | TN-586 |
| Pricing | Upon Request |
| Measurement Method | Alkaline Potassium Persulfate Digestion–UV Spectrophotometry |
| Measurement Range | 0–150.0 mg/L (customizable extension available) |
| Accuracy | ±10% of reading |
| Detection Limit | 0.1 mg/L |
| Resolution | 0.1 mg/L |
| Compliance | GB 11894–1989 |
| Repeatability | ≤±10% |
| Minimum Cycle Time | 40 min |
| Sampling Interval | 10–9999 min (programmable) + On-the-Hour Mode |
| Calibration Options | Manual & Automatic |
| Output Interfaces | RS232, RS485, 4–20 mA analog |
| Field Sample Comparison Error | ≤±10% |
| Dimensions | 1430 × 500 × 403 mm |
| Brand | Lianhua |
|---|---|
| Origin | Beijing, China |
| Manufacturer Type | Direct Manufacturer |
| Product Origin | Domestic (China) |
| Model | LH-P3TN |
| Pricing | Available Upon Request |
| Measurement Method | Chromotropic Acid Method |
| Measurement Range | 0–150 mg/L |
| Accuracy | ≤ ±10% |
| Brand | Lihero |
|---|---|
| Model | LFS-2002(TN) |
| Measurement Principle | High-Temperature Alkaline Persulfate Oxidation + UV Spectrophotometry (220 nm & 275 nm) |
| Detection Range | 0.05–100 mg/L TN (typical, configurable) |
| Detection Method | A = A₂₂₀ₙₘ − 2 × A₂₇₅ₙₘ |
| 消解条件 | 120–124 °C, ≥0.11 MPa, 30 min |
| Optical System | Dual-Wavelength UV Photometer with Auto-Balanced Optical Path |
| Calibration Modes | Zero Check, Span Check, Standard Calibration, Curve Auto-Standardization, Spike Recovery Test |
| Compliance Support | ASTM D5176, ISO 11908, HJ 636-2012, EPA 351.2 (adapted), GLP/GMP-ready data logging |
| Remote Interface | Modbus TCP/IP, RS485, Optional 4G/LTE Data Upload |
| Operating System | Embedded Linux Real-Time OS |
| Self-Diagnosis | Integrated Sensor Health Monitoring, Reagent Level Sensing, Optical Path Stability Verification, Fault Logging & Cloud Upload |
| Brand | TE / Trace Elemental Instruments |
|---|---|
| Origin | Netherlands |
| Model | XPLORER-V with VECTRA Liquid Autosampler |
| Analytical Method | Combustion Microcoulometry |
| Measurement Range | 0–10,000 ppm |
| Accuracy | ≤2% CV |
| Detection Limit | 10 ppb |
| Resolution | ≤2% CV |
| Brand | TUNE VOLT |
|---|---|
| Model | TW-5235 |
| Origin | Beijing, China |
| Measurement Range | 0.05–100 mg/L (three sub-ranges: 0–1, 1–10, 10–100 mg/L) |
| Accuracy | ±5% or ±0.2 mg/L (whichever is greater) |
| Repeatability | ≤±3% |
| Chloride Interference Tolerance | ≤2000 mg/L |
| Digestion Temperature | 125 °C (adjustable from ambient to 180 °C) |
| Digestion Time | 30 min |
| Optical Drift | <0.002 A over 20 min |
| Dimensions | 400 × 310 × 158 mm |
| Weight | 5 kg |
| Display | Backlit LCD with Chinese menu interface |
| Data Storage | 10 calibration curves + 99 measurement records (non-volatile memory) |
| Connectivity | USB port for data export |
| Output | Integrated thermal printer |
| Light Source | High-brightness, long-life (100,000 h) imported LED |
| Brand | WAYEAL |
|---|---|
| Origin | Anhui, China |
| Manufacturer Type | Direct Manufacturer |
| Product Category | Domestic |
| Model | WS1505 |
| Pricing | Upon Request |
| Measurement Method | Alkaline Potassium Persulfate Digestion – UV Spectrophotometry |
| Measurement Range | 0–200.0 mg/L (expandable) |
| Accuracy | ±5% |