Nitrogen Determinator
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| Brand | Top Cloud-agri |
|---|---|
| Origin | Zhejiang, China |
| Manufacturer Type | Direct Manufacturer |
| Country of Origin | China |
| Model | ZDDN-II |
| Price | USD 1,800 (approx.) |
| Measurement Principle | Kjeldahl Digestion & Steam Distillation |
| Sample Throughput | 1–4 samples per run |
| Nitrogen Range | 0.1–200 mg N |
| Recovery Rate | ≥99% |
| Repeatability | RSD < ±1% |
| Distillation Time | 5–15 min/sample |
| Cooling Water Consumption | 3 L/min |
| Power Supply | AC 220 V / 50 Hz, 1000 W |
| Dimensions | 430 × 360 × 670 mm |
| Weight | 25 kg |
| Sample Capacity | Solids (0.20–2.00 g), Semi-solids (2.00–5.00 g), Liquids (10.00–25.00 mL) |
| Water Supply Options | Tap water or distilled water |
| Max. Operating Ambient Temperature | ≤30 °C |
| Cooling Water Inlet Temp. | <20 °C |
| Brand | Truelab |
|---|---|
| Origin | Shanghai, China |
| Model | KDN-103F |
| Instrument Type | Kjeldahl Nitrogen Determinator |
| Automation Level | Semi-Automatic |
| Nitrogen Determination Range | 0.1–200 mg N |
| Steam Distillation Rate | 25 mL/min |
| Repeatability (RSD) | ≤0.2% |
| Sample Mass | 0.3–8 g (solid) or 5–30 mL (liquid) |
| Nitrogen Recovery Rate | ≥99.5% |
| Power Consumption | 1200 W |
| Dimensions (L×W×H) | 360 × 300 × 700 mm |
| Weight | 27 kg |
| Operating Voltage | 220 V ±10%, 50–60 Hz |
| Alkali Addition Volume per Cycle | 150 mL |
| Condensate Reception Volume | 400 mL |
| Acid/Alkali-Resistant Splash Guard Material | High-Performance Molded Polymer |
| Brand | Truelab |
|---|---|
| Origin | Shanghai, China |
| Model | KDN-2008 |
| Automation Level | Fully Automated |
| Nitrogen Determination Range | 0.1–200 mg N |
| Sample Capacity | 8 samples per run |
| Steam Distillation Rate | 25 mL/min |
| Relative Standard Deviation (RSD) | ≤1% |
| Nitrogen Recovery Rate | ≥99.5% |
| Power Consumption | 1200 W |
| Dimensions (L×W×H) | 310 × 300 × 690 mm |
| Net Weight | 28 kg |
| Compliance | ASTM D1142, ISO 8968-1, AOAC 981.10, GB/T 6423–2022 |
| Brand | Truelab |
|---|---|
| Origin | Shanghai, China |
| Model | SZC-C |
| Instrument Type | Soxhlet Fat Extractor (not Kjeldahl Nitrogen Determinator — note correction per technical classification) |
| Automation Level | Manual (user-controlled heating, timing, and solvent management) |
| Fat Determination Range | ≥0.5% (crude fat in grains, foods, feeds, oils, and lipid products) |
| Sample Capacity | 6 positions simultaneously |
| Extraction Time | ~3.5 min per cycle (dependent on solvent boiling point and sample matrix) |
| Repeatability | Relative standard deviation ≤3% |
| Parallel Precision | ≤0.3% absolute difference between duplicates |
| Solvent Recovery Rate | ≥80% |
| Recovery Efficiency | ≥99% (under standardized conditions: reflux rate 120 drops/min, coolant inlet temperature ≤30 °C) |
| Heating Range | Ambient to 200 °C (digital PID-controlled) |
| Temperature Accuracy | ±1 °C |
| Heating Method | Fully enclosed aluminum alloy heating plate |
| Sealing Material | PTFE gaskets |
| Power Supply | 220 V ±10%, 50–60 Hz |
| Rated Power | 300 W |
| Dimensions (L×W×H) | 590 × 390 × 625 mm |
| Net Weight | 25 kg |
| Brand | VELP |
|---|---|
| Origin | Italy |
| Model | CN802 |
| Analysis Principle | Dumas Combustion Method |
| Measurement Range | 0.001–200 mg N (equivalent to ppm–100% N in sample) |
| Sample Weight | 200 mg–1 g |
| Digestion/Combustion Time | 3–4 min per sample |
| Repeatability | RSD < 0.5% (verified with EDTA reference standard) |
| Detection Limits | 0.01 mg C, 0.001 mg N |
| Recovery Rate | >99.5% |
| Power Consumption | 1400 W |
| Dimensions (L×W×H) | 655 × 510 × 410 mm |
| Carrier Gas Options | Helium or Argon (dual-gas system, no hardware modification required) |
| Compliance | Designed for GLP/GMP environments |
| Brand | VELP |
|---|---|
| Origin | Italy |
| Model | DKL Series |
| Instrument Type | Kjeldahl Digestion Unit |
| Max Operating Temperature | 450 °C |
| Temperature Accuracy | ±0.5 °C |
| Ramp Time to 450 °C | 22 min |
| Programmable Steps | 54 |
| Heating Module | Anodized Aluminum Block |
| Digestion Tube Compatibility | DKL8 (250 mL, Ø42 mm), DKL12 (250/400 mL, Ø42 mm), DKL20 (250 mL, Ø42 mm), DKL42 (100 mL, Ø26 mm) |
| Automation Level | Fully Automatic (Digestion + Cooling + End-of-Process Alert) |
| User Interface | Detached LCD Display |
| Unique Technology | VELP TEMS™ (Time, Energy, Money, Space Optimization) |
| Brand | VELP |
|---|---|
| Origin | Italy |
| Model | DKL Series |
| Heating Temperature Range | Room Temperature to 450 °C |
| Temperature Control Accuracy | ±0.5 °C |
| Programmable Heating Profiles | 54 Predefined + 24 User-Defined |
| Heating Ramp Stages | 4 |
| Heating Duration | 0–999 min |
| Automatic Lift Arm | Yes |
| Compliance Standards | AOAC, EPA, DIN, ISO |
| Display Interface | Multilingual (including Chinese) |
| Available Configurations | DKL8 (8-position), DKL12 (12-position), DKL20 (20-position), DKL42 (42-position) |
| Brand | VELP |
|---|---|
| Country of Origin | Italy |
| Instrument Type | Dumas Combustion Analyzer |
| Automation Level | Fully Automated |
| Measurement Range | 5–20 mg sample mass |
| Sample Weight Capacity | up to 100 mg |
| Distillation Time | 6–12 min |
| Repeatability | ≤ 0.2 % RSD (sulfanilic acid) |
| Oxygen Recovery Rate | ≤ 0.2 % |
| Power Consumption | 570 W |
| Dimensions (L×W×H) | 500 × 510 × 410 mm |
| Brand | VELP |
|---|---|
| Origin | Italy |
| Model | NDA 701/702 |
| Principle | Dumas Combustion Method |
| Detection Limit | NDA 701: 0.003 mg N (He) |
| NDA 702 | 0.001 mg N (He) or 0.01 mg N (Ar) |
| Analysis Time | 3–4 min per sample |
| Repeatability (RSD) | <0.5% using EDTA standard (9.57% N) |
| Sample Weight | 1 g |
| Recovery Rate | >99.5% |
| Power Consumption | 1400 W |
| Dimensions (W×D×H) | 655 × 510 × 410 mm |
| Weight | 54 kg |
| Carrier Gas | He (≥99.999%) or Ar (≥99.999%) |
| Oxygen Supply | O₂ (≥99.999%, 2 bar) |
| Combustion Temperature | 1030 °C |
| Detector | Auto-calibrating Thermal Conductivity Detector (TCD) |
| Throughput | Up to 117 samples (4 × 30-position auto-samplers) |
| Compliance | ASTM D515, ISO 13878, AOAC 992.15, EN ISO 16634-1/-2, USP <285>, FDA 21 CFR Part 11 ready (with Ermes software license) |
| Brand | VELP |
|---|---|
| Origin | Italy |
| Model | NDA701 |
| Analysis Method | Dumas combustion |
| Automation Level | Fully automated |
| Detection Limit | 0.003 mg N |
| Reproducibility (RSD) | < 0.5% |
| Recovery | > 99.5% |
| Combustion Temperature | 1030 °C |
| Sample Weight Capacity | up to 1 g |
| Autosampler Capacity | up to 116 samples |
| Carrier Gas | Helium (99.999% purity, 3 bar) |
| Oxygen Supply | 99.999% purity, 3 bar |
| Auxiliary Gas | Compressed air or nitrogen (99.6%, oil- and water-free, 4 bar) |
| Power Consumption | 1400 W |
| Dimensions (W×H×D) | 655 × 510 × 410 mm (655 × 690 × 410 mm with autosampler) |
| Weight | 54 kg |
| Interfaces | USB, RS232 |
| Compliance | AOAC, AACC, ASBC, ISO 14891, OIV |
| Brand | VELP |
|---|---|
| Origin | Italy |
| Instrument Type | Dumas Combustion Method |
| Repeatability | < 0.1% |
| Recovery Rate | > 99.5% |
| Power Consumption | 1400 W |
| Dimensions (L×W×H) | 655 × 510 × 410 mm |
| Weight | 54 kg |
| Voltage/Frequency | 230 V / 50–60 Hz |
| Compliance | ASTM D5623, ISO 14891, AOAC 992.15, EN ISO 16634-1 |
| Brand | VELP |
|---|---|
| Origin | Italy |
| Model | NDA702 |
| Analysis Principle | Dumas Combustion Method |
| Carrier Gases | Helium or Argon (switchable without hardware modification) |
| Digestion/Combustion Time | 3–4 min per sample |
| Repeatability (RSD) | < 0.5% |
| Recovery Rate | > 99.5% |
| Detection Limit | 0.001 mg N (He), 0.01 mg N (Ar) |
| Combustion Temperature | 1030 °C |
| Power Consumption | 1400 W |
| Auto-sampler Capacity | Up to 117 positions (4 trays × 30 positions) |
| Dimensions (W×D×H) | 655 × 510 × 410 mm |
| Weight | 55 kg |
| Electrical Supply | 230 V / 50 Hz |
| Gas Purity Requirement | ≥99.999% for He/Ar and O₂ |
| Gas Pressure Requirement | 2 bar for carrier gas and O₂ |
| Detector | Calibrated Thermal Conductivity Detector (TCD), reference-gas-free operation |
| Sample Mass Range | Up to 1.0 g |
| Data Interfaces | USB, RS232 |
| Brand | VELP |
|---|---|
| Origin | Italy |
| Model | OXITEST |
| Instrument Type | Accelerated Oxidation Stability Analyzer |
| Pressure Range | 0–8 bar |
| Temperature Range | Ambient to 110 °C |
| Sample Volume | 100 mL per chamber |
| Power Consumption | 900 W |
| Voltage | 230 V / 50–60 Hz |
| Dimensions (L×W×H) | 365 × 190 × 485 mm |
| Weight | 16.5 kg |
| Safety Features | Integrated safety vacuum tube, visual over-temperature alarm, real-time fault indication |
| Compliance | CE-marked, IEC-compliant, ISO 9001 / ISO 14001 / ISO 45001 (formerly OHSAS 18001) certified |
| Brand | VELP |
|---|---|
| Origin | Italy |
| Model | UDK 129 |
| Instrument Type | Kjeldahl Nitrogen Determinator |
| Nitrogen Determination Range | 0.1–200 mg |
| Distillation Time | 3–5 min per sample |
| Repeatability | ±0.5% |
| Sample Weight Capacity | ≤5 g |
| Nitrogen Recovery Rate | ≥99.5% |
| Power Consumption | 2100 W |
| Dimensions (W×D×H) | 385×416×780 mm |
| Brand | VELP |
|---|---|
| Origin | Italy |
| Model | UDK 139 |
| Instrument Type | Kjeldahl Nitrogen Determinator |
| Measurement Range | 0.01–100 mg N |
| Distillation Time | 4 min (for 100 mL sample) |
| Repeatability | ≤1% |
| Sample Mass Requirement | ≥0.1 g N |
| Recovery Rate | ≥99.5% |
| Power Consumption | 2100 W |
| Dimensions (W×D×H) | 385 × 416 × 780 mm |
| Brand | VELP |
|---|---|
| Origin | Italy |
| Model | UDK 149 |
| Instrument Type | Kjeldahl Nitrogen Determinator |
| Nitrogen Determination Range | 0.1–200 mg |
| Distillation Time | 3–4 min/sample |
| Repeatability | ±0.5% |
| Sample Weight Capacity | ≤5 g |
| Nitrogen Recovery Rate | ≥99% |
| Power Consumption | 2100 W |
| Dimensions (W×D×H) | 380 × 416 × 780 mm |
| Brand | VELP |
|---|---|
| Origin | Italy |
| Model | UDK 159 |
| Instrument Type | Kjeldahl Nitrogen Determinator |
| Nitrogen Detection Range | ≥ 0.1 mg N |
| Distillation Time | 0–99 min |
| Repeatability | ≤ 1 % |
| Sample Weight Capacity | 10 g |
| Nitrogen Recovery Rate | ≥ 99.5 % |
| Power Consumption | 2200 W |
| Dimensions (L×W×H) | 416 mm × 385 mm × 780 mm |
| Brand | VELP |
|---|---|
| Origin | Italy |
| Model | UDK 169 & AutoKJEL |
| Instrument Type | Kjeldahl Nitrogen Determinator |
| Nitrogen Detection Range | ≥0.1 mg N |
| Distillation Time | 1–99 min |
| Repeatability | ≤1% |
| Sample Weight Capacity | 10 g |
| Nitrogen Recovery Rate | >99.5% |
| Power Consumption | 2200 W |
| Dimensions (W×D×H) | 385 mm × 416 mm × 780 mm |
| Brand | VELP |
|---|---|
| Country of Origin | Italy |
| Model | UDK129 |
| Housing Material | Corrosion-Resistant Polymer |
| Display | LCD |
| Programmable Methods | User-Defined Protocols |
| NaOH Addition | Automated, 0–100 mL |
| Cooling Water Consumption | 0.5 L/min at 15°C, 1 L/min at 30°C |
| Distillation Time | ≤5 min for 100 mL water |
| Repeatability (RSD) | ≤1% |
| Nitrogen Recovery Rate | ≥99.5% (for N content 1–200 mg) |
| Detection Limit | ≥0.1 mg N |
| Power Rating | 2100 W |
| Voltage/Frequency | 230/115 V, 50/60 Hz |
| Dimensions (W×H×D) | 385 × 780 × 416 mm |
| Weight | 25 kg |
| Brand | VELP |
|---|---|
| Origin | Italy |
| Model | UDK129 |
| Instrument Type | Kjeldahl Nitrogen Determinator |
| Distillation Time | 1–99 min (typical: 3.5 min per sample) |
| Repeatability | ≤1% RSD |
| Nitrogen Recovery Rate | ≥99.5% |
| Detection Limit | ≥0.1 mg N |
| Cooling Water Flow | 0.5 L/min at 15°C to 1.0 L/min at 30°C |
| Power Consumption | 2100 W |
| Enclosure Material | Reinforced Steel Structure with Chemical-Resistant Coating |
| Sample Tube Compatibility | Conical taper interface supporting digestion tubes up to 500 mL |
| Preheating Time | 90 s |
| Safety Features | Digestion tube presence sensor, closed-alkali delivery system, automatic cooling water shutoff during idle mode |
| Brand | VELP |
|---|---|
| Origin | Italy |
| Model | UDK139 |
| Instrument Type | Automated Kjeldahl Nitrogen Determinator |
| Nitrogen Determination Range | 0.1–200 mg N |
| Sample Weight Capacity | ≤5 g |
| Distillation Time | 1–99 min (typical 3.5 min per sample) |
| Repeatability | ≤1% RSD |
| Nitrogen Recovery Rate | ≥99.5% |
| Power Consumption | 2100 W |
| Dimensions (L×W×H) | 780 mm × 385 mm × 416 mm |
| Safety Features | Steam Generator Overtemperature Protection, Cooling Water Flow Monitoring, Digestion Tube Position Sensor, Safety Door Interlock |
| Interface Ports | RS232, 2×USB, TTL, Ethernet |
| Programmable Methods | Up to 20 user-defined distillation protocols |
| Automatic Functions | Alkali dosing, steam generation, dilution, waste ejection (digestion tube & titration cup), cup rinsing, endpoint detection |
| Display | 3.5-inch capacitive touchscreen with multilingual UI (including English and Chinese) |
| Brand | VELP |
|---|---|
| Country of Origin | Italy |
| Model | UDK139 |
| Display | 3.5″ Color Touchscreen |
| Programmable Methods | 10 Custom Protocols |
| NaOH/H₂O Addition | Automatic (0–150 mL / 0–200 mL) |
| Steam Output Regulation | 10–100% |
| Cooling Water Consumption | 0.5 L/min at 15°C |
| Repeatability (RSD) | ≤1% |
| Nitrogen Recovery | ≥99.5% (for 1–200 mg N) |
| Detection Limit | ≥0.1 mg N |
| Distillation Time for 100 mL Water | 4 min |
| Power Rating | 2100 W |
| Voltage/Frequency | 230 V, 50–60 Hz |
| Dimensions (W×H×D) | 385 × 780 × 416 mm |
| Weight | 26 kg |
| Interface | 2×USB |
| Enclosure Material | Corrosion-Resistant Polymer Housing |
| Condenser | Titanium-Coated |
| Safety Sensors | Tube Presence, Safety Door Interlock, Alkali Container Guard Rod, Waste Tray Level, Condensate Flow, Reagent Volume Monitoring |
| Brand | VELP |
|---|---|
| Origin | Italy |
| Model | UDK149 |
| Instrument Type | Automated Kjeldahl Nitrogen Determinator |
| Automation Level | Fully Automated |
| Nitrogen Determination Range | 0.1–200 mg N |
| Recovery Rate | ≥99.5% (for N content between 0.1–200 mg) |
| Power Consumption | 2100 W |
| Dimensions (W×H×D) | 385 × 780 × 416 mm |
| Touchscreen Display | 3.5-inch color LCD |
| Data Storage Capacity | 50,000 test records |
| Stored Methods | 20 pre-programmed SOPs |
| Repeatability (RSD) | ≤1% |
| Detection Limit | ≥0.1 mg N |
| Steam Output Control | 10–100% adjustable |
| Cooling Water Flow | 0.5 L/min at 15°C |
| Alkali/Water/Acid Dispensing Volume | 0–150 mL / 0–200 mL / 0–100 mL |
| Distillation Time for 100 mL Water | 3 minutes |
| Weight | 27 kg |
| Power Supply | 230 V, 50–60 Hz |
| Connectivity | RS232, USB, TTL, Ehmet interface |
| Brand | VELP |
|---|---|
| Origin | Italy |
| Model | UDK149 |
| Instrument Type | Automated Kjeldahl Nitrogen Determinator |
| Distillation Time | 1–99 min (typical cycle: 3.5 min per sample) |
| Repeatability | ≤1% RSD |
| Nitrogen Recovery Rate | ≥99.5% |
| Power Consumption | 2100 W |
| Dimensions (L×W×H) | 385 × 780 × 416 mm |
| Weight | 27 kg |
| Safety Compliance | Integrated thermal, mechanical, and fluid-flow interlocks |
| Interface Ports | RS232, dual USB, TTL, Ethernet |
| Display | 3.5-inch capacitive touchscreen |
| Control Architecture | Fully programmable microprocessor-based automation system |
| Cooling System | High-efficiency titanium condenser (low water consumption) |
| Brand | VELP |
|---|---|
| Origin | Italy |
| Model | UDK159 |
| Instrument Type | Kjeldahl Nitrogen Determinator |
| Automation Level | Semi-Automated Kjeldahl System |
| Compliance Standards | AOAC, ISO 8968, ISO 1871, EPA 350.1, DIN 10492, DIN 10493 |
| Construction Materials | Corrosion-Resistant Polymer Front Panel, Titanium Condenser, Patented Polymer Anti-Splash Head |
| Safety Features | Tube Presence Sensor, Safety Door Interlock, Alkali Reservoir Guard Rod, Waste Tray Level Detection, Condensate Flow Monitoring, Reagent Volume Monitoring, Color-Coded Tubing |
| Titration Method | Photometric (Colorimetric) Titration per AOAC Official Method 981.10 |
| Interface Options | USB 2.0, RS-232, Optional Ethernet Connectivity |
| Data Management | Onboard Storage, GLP-Compliant Audit Trail, Export via USB Drive or PC Connection |
| Peripheral Compatibility | Integrated Balance Interface, Thermal Printer Support, External Computer Synchronization |
| Brand | VELP |
|---|---|
| Origin | Italy |
| Model | UDK159 |
| Instrument Type | Automated Kjeldahl Nitrogen Determinator |
| Nitrogen Determination Range | 0.1–200 mg N |
| Distillation Time | 1–99 min (typical 3.5 min per sample) |
| Repeatability | ≤1% RSD |
| Sample Nitrogen Mass Capacity | 0.1–200 mg N |
| Nitrogen Recovery Rate | ≥99.5% |
| Power Consumption | 2200 W |
| Dimensions (W×D×H) | 385 × 780 × 416 mm |
| Weight | 31 kg |
| Display | 6-inch full-color capacitive touchscreen |
| Operating System | Embedded Windows-based UI |
| Language Options | English, Chinese, Italian, French, Russian |
| Data Storage Capacity | >100,000 test records |
| Connectivity | Ethernet, 2× USB, RS232 |
| Steam Generator | Atmospheric-pressure stainless-steel steam generator with optimized thermal conductivity |
| Condenser | High-efficiency titanium condenser |
| Safety Sensors | Digestion tube position, safety door interlock, drip tray level, cooling water overflow, reagent tank level, waste tank level |
| Protective Features | Splash guard (polymer-based, replacing glass), corrosion-resistant housing, color-coded digestion tubes |
| Brand | VELP |
|---|---|
| Country of Origin | Italy |
| Model | UDK169 |
| Power Supply | 230 V / 50–60 Hz |
| Distillation Time | 3–4 min |
| Dispensing Precision | ±2 µL per step |
| Sample Capacity | 24 × 250 mL tubes (Ø42 mm) or 21 × 400 mL tubes (Ø52 mm) |
| Nitrogen Recovery Rate | 99.5% |
| Rated Power | 2250 W |
| Dimensions (W×H×D) | 830 × 1730 × 640 mm |
| Weight | 170 kg |
| Brand | VELP |
|---|---|
| Origin | Italy |
| Model | UDK169 and AutoKjel |
| Instrument Type | Kjeldahl Nitrogen Determinator |
| Recovery Rate | ≥99.5% |
| Repeatability | ≤1% |
| Distillation Time (incl. Titration) | 4 min |
| Power Consumption | 2250 W |
| Dimensions (L×W×H) | 830 × 1730 × 416 mm |
| Weight | 171 kg |
| Compliance | ASTM D1144, ISO 8968-1, AOAC 981.10, USP <321>, EN ISO 1871 |
| Software | UDK Control Suite v3.x with GLP-compliant audit trail |
| Connectivity | RS232, USB, optional Ethernet/LAN |
| Sample Throughput | Up to 20 samples per hour (continuous mode) |
| Safety Certifications | CE, IEC 61010-1, IP22 |
| Brand | Xianjian |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Instrument Type | Kjeldahl Nitrogen Determinator |
| Automation Level | Fully Automated |
| Nitrogen Measurement Range | 0.1–240.0 mg N per sample |
| Distillation Time | 3–8 min per sample |
| Accuracy | Relative Error ≤ 0.3% |
| Repeatability | Parallel Difference ≤ 0.2% |
| Sample Weight Capacity | ≤ 8.0 g (solid), ≤ 30.0 mL (liquid) |
| Nitrogen Recovery Rate | ≥ 99.5% |
| Power Consumption | 1700 W |
| Dimensions (L×W×H) | 580 × 430 × 750 mm |
| Brand | Zhiyue Instrument |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Region of Origin | Domestic (China) |
| Model | KDN-380F |
| Instrument Type | Kjeldahl Nitrogen Determinator |
| Automation Level | Semi-Automatic |
| Nitrogen Determination Range | 0.1–240 mg N |
| Sample Weight Capacity | Solids 0.3–8.0 g |
| Distillation Time | 5–8 min per sample |
| Repeatability | ±0.3% RSD |
| Recovery Rate | ≥99.5% |
| Power Rating | 1300 W |
| Dimensions (L×W×H) | 420 × 340 × 710 mm |