Water Quality Analysis
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| Origin | Fujian, China |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Origin Category | Domestic (China) |
| Model | Lawlink System |
| Price Range | USD 70,000 – 140,000 |
| Origin | Fujian, China |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Origin Category | Domestic (PRC) |
| Model | LawLink |
| Pricing | Available Upon Request |
| Brand | Lei-Mag |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Instrument Type | Laboratory Water Quality Analyzer |
| Model | DZS-708L |
| Measurement Parameters | pH, ORP, mV, pX, Ion Concentration, Conductivity, Resistivity, TDS, Salinity, Ash Content, Dissolved Oxygen (DO) Concentration, DO Saturation, Temperature |
| Display | 7-inch HD color capacitive touchscreen |
| IP Rating | IP54 |
| Channels | 4 independent measurement channels |
| Supported Modules | pH Module, pX Module, EC-T (2-electrode conductivity), EC-F (4-electrode conductivity), DO-F (fluorescence-based DO), DO-P (polarographic DO) |
| Compliance | GLP, GMP-ready audit trail, ASTM D1125, ISO 7888, ISO 5814, USP <643>, EN 27888 |
| Data Storage | 1000 measurement records per parameter, 100 calibration sets, 1000 verification logs |
| Interfaces | RS-232, USB-A, USB-B (PC connection), optional barcode scanner support |
| Operating Environment | 0–40 °C, ≤85% RH |
| Brand | Leichi |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Country of Origin | China |
| Model | COD-582 |
| Instrument Type | Online Analyzer |
| Measurement Principle | Potassium Dichromate Digestion Method (Online) |
| Measurement Range | 10.0–5000 mg/L |
| Accuracy | ±10% or ±5 mg/L (for values ≤50 mg/L) |
| Repeatability | 5% or 5 mg/L (for values ≤100 mg/L) |
| Resolution | 0.1 mg/L (≤100 mg/L), 1 mg/L (>100 mg/L) |
| Zero Drift | ±5 mg/L/24 h |
| Span Drift | ±10%/24 h |
| Power Supply | AC 220 V ±10%, 50 Hz |
| Dimensions (W×D×H) | 550 × 400 × 1680 mm |
| Weight | 50 kg |
| MTBF | ≥360 hours |
| Output | Isolated 4–20 mA DC (configurable upper/lower limits) |
| Communication | RS-232 or RS-485 (selectable) |
| Interface | 7-inch color LCD touchscreen |
| Maintenance Interval | Up to 30 days without service |
| Brand | Leichi |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Country of Origin | China |
| Model | DO-30 |
| Instrument Type | Portable |
| Measurement Principle | Electrochemical (Clark-type Polarographic Sensor) |
| Dissolved Oxygen Range | 0.0–20.0 mg/L |
| Resolution | 0.1 mg/L |
| Accuracy | ±0.3 mg/L |
| Repeatability | ≤0.2 mg/L |
| Temperature Range | 0.0–60.0 °C |
| Temp. Resolution | 0.1 °C |
| Temp. Accuracy | ±0.3 °C |
| Auto Temperature Compensation | Yes (0–50.0 °C) |
| IP Rating | IP67 |
| Power | 4 × AAA batteries |
| Battery Life | >200 h |
| Dimensions | 40 × 30 × 188 mm |
| Weight | ~0.15 kg |
| Enclosure Material | ABS |
| Brand | Leichi |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Regional Classification | Domestic (China) |
| Model | DWG-8025A |
| Price Range | USD 2,800 – 7,000 (FOB Shanghai) |
| Instrument Category | Sodium Ion Analyzer |
| Instrument Type | Online Continuous Monitoring System |
| Measurement Range | 0.1–1000 µg/L Na⁺ |
| Resolution | 0.1 µg/L (≤10 µg/L), 1 µg/L (>10 µg/L) |
| Temperature Range | −10.0 to +120.0 °C |
| Temperature Resolution | 0.1 °C |
| Accuracy (Sodium) | ±10% of reading ±0.1 µg/L |
| Accuracy (Temperature) | ±0.5 °C (0.0–60.0 °C), ±1.0 °C (other) |
| Repeatability | ≤5% of reading |
| Drift Stability | ±10% of reading / 24 h (system), ±3% of reading / 24 h (electronic unit) |
| Enclosure Rating | IP65 |
| Power Supply | AC 220 V ±10%, 50 Hz ±1% |
| Output | Isolated 4–20 mA DC (configurable span), RS-232 or RS-485 (user-selectable) |
| Optional | Integrated pH auto-adjustment module |
| Brand | Leichi |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Country of Origin | China |
| Model | DX-01 |
| Instrument Type | Portable/HANDHELD Water Quality Analyzer |
| Digestion Positions | 8 |
| Temperature Range | 45–185 °C |
| Temperature Accuracy | ±0.1 °C |
| Temperature Display Error | ±2 °C |
| Temperature Uniformity | ≤2 °C |
| Digestion Time Range | 0–480 min |
| Time Display Error | ±2% |
| Power Supply | AC 220 V ±10%, 50 Hz ±0.5 Hz |
| Rated Power | ~250 W |
| Dimensions (L×W×H) | 165 × 270 × 145 mm |
| Weight | ~2 kg |
| Operating Environment | 0–40 °C, RH ≤85% |
| Safety Features | Over-Temperature Alarm, Protective Shield, Sealed Micro-Reflux Design |
| Heating Modes | Continuous / Intermittent |
| User Interface | High-Resolution Color TFT Touchscreen |
| Preloaded Methods | 8 Standard Digestion Protocols + 1 Customizable Method |
| Brand | Leichi |
|---|---|
| Origin | Shanghai, China |
| Model | DZS-708T-A |
| Instrument Type | Laboratory Water Quality Analyzer |
| Detection Principle | Colorimetric Method (for optional add-on modules) |
| Measured Parameters | pH, pX (Ion Selective Electrode), mV, ORP, Conductivity, Resistivity, TDS, Salinity, Ash Content, Temperature |
| pH Range | 0.00–14.00 |
| Repeatability | ≤0.5% |
| Display | 7-inch color TFT LCD touchscreen |
| IP Rating | IP54 |
| Interface | RS-232, USB, USB host (U-disk, barcode scanner support) |
| Data Storage | 1000 datasets with GLP-compliant metadata |
| Calibration | Up to 6-point pH/pX |
| Temp Compensation | Automatic (linear, nonlinear, pure water, seawater, user-defined reference temp: 5.0–25.0 °C) |
| Electrode Diagnostics | Built-in |
| Software Compliance | Supports GMP audit trail, user-level access control (3-tier), method/data management, firmware upgrade |
| Brand | Leichi |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Original Equipment Manufacturer (OEM) |
| Product Category | Domestic |
| Model | DZS-708TP Automated Electrochemical Water Quality Analyzer |
| Instrument Type | Laboratory Water Quality Analyzer |
| Measurable Parameters | pH, Conductivity, Dissolved Oxygen (DO), Ion Concentration (pX), ORP, TDS, Salinity, Resistivity, Ash Content (White Sugar & HFCS), Temperature |
| Brand | Leichi |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Country of Origin | China |
| Model | JPB-607A |
| Instrument Type | Portable |
| Measurement Principle | Electrochemical (Clark-type Polarographic Sensor) |
| Dissolved Oxygen Range | 0.00–20.00 mg/L |
| Resolution | 0.01 mg/L |
| Accuracy (DO) | ±0.30 mg/L |
| Response Time (90% at 20.0 °C) | ≤45 s |
| Saturation Range | 0.0–200.0 % |
| Temperature Range | −5.0–110.0 °C |
| Temp. Accuracy | ±0.4 °C (0.0–60.0 °C), ±1.0 °C (other) |
| Salt Compensation Error | ±2% |
| Atmospheric Pressure Compensation | Manual |
| IP Rating | IP65 |
| Data Storage Capacity | 200 sets |
| Power Supply | Rechargeable Li-ion battery (DC5V input compatible) |
| Dimensions | 80 × 225 × 35 mm |
| Weight | 0.4 kg |
| Brand | Leichi |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Country of Origin | China |
| Model | JPBJ-610L |
| Instrument Type | Portable |
| Measurement Principle | Fluorescence Quenching |
| DO Range | (0.00–20.00) mg/L |
| Accuracy | ±0.30 mg/L (reading error) |
| Resolution | 0.01 mg/L |
| Repeatability | 0.15 mg/L |
| Zero Oxygen Error | ≤0.1 mg/L |
| Response Time | ≤60 s (90% response at 20 °C) |
| DO Saturation Range | (0.0–200.0)% |
| Saturation Accuracy | ±10.0% |
| Temperature Range | (0.0–50.0) °C |
| Temp. Resolution | 0.1 °C |
| Temp. Accuracy | ±0.3 °C |
| Salinity Compensation | Manual, (0.0–50.0) g/L |
| Atmospheric Pressure Compensation | Auto/Manual, (50.0–110.0) kPa |
| IP Rating | IP65 |
| Power | Rechargeable Li-ion battery |
| Dimensions | 90 × 255 × 40 mm |
| Weight | 0.5 kg |
| Brand | Leichi |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Regional Classification | Domestic (China) |
| Model | JPSJ-605F |
| Instrument Type | Benchtop Laboratory Meter |
| Measurement Principle | Polarographic Electrochemical Probe |
| DO Range | (0.00–50.00) mg/L |
| Accuracy | ±0.30 mg/L (≤20.00 mg/L) |
| Repeatability | 0.15 mg/L |
| Detection Limit | 0.01 mg/L |
| Temperature Range | (−10.0 to 135.0) °C |
| Temp. Accuracy | ±0.3 °C (0.0–60.0 °C) |
| Response Time | ≤45 s (90% response at 20.0 °C) |
| Saturation Range | (0.0–600.0) % |
| Salt Compensation Error | ±2.0% saturation |
| IP Rating | IP54 |
| Interface | RS-232, USB |
| Data Storage | 500 sets |
| Power Supply | AC 100–240 V input / DC 9 V output |
| Dimensions | 242 × 195 × 68 mm |
| Weight | 0.9 kg |
| Brand | Leichi |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Regional Origin | Domestic (China) |
| Model | JPSJ-606L |
| Instrument Type | Benchtop Laboratory Meter |
| Measurement Principle | Electrochemical Polarographic Probe |
| DO Range (Instrument Electronics) | 0.00–90.00 mg/L |
| DO Range (with Standard Probe) | 0.00–50.00 mg/L |
| Accuracy (DO) | ±0.10 mg/L (electronic unit) |
| Repeatability | ≤0.15 mg/L |
| Detection Limit | 0.00 ± 0.10 mg/L |
| DO Saturation Range | 0.0–600.0 % |
| DO Saturation Resolution | 0.1 % |
| DO Saturation Accuracy | ±2.0 % |
| Temperature Range | −5.0–130.0 °C |
| Temperature Resolution | 0.1 °C |
| Temperature Accuracy | ±0.1 °C |
| Atmospheric Pressure Compensation | 60.0–110.0 kPa |
| Salinity Compensation | 0.0–50.0 g/L |
| Power Supply | 24 VDC, 3 A (via external adapter: 100–240 VAC input) |
| Dimensions (W×D×H) | 280 × 280 × 130 mm |
| Weight | 2.5 kg |
| 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 | LeiCi |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Region Category | Domestic (China) |
| Model | BOD-573 |
| Price Range | USD 1,400 – 7,200 |
| Instrument Type | Laboratory BOD Analyzer |
| Measurement Principle | Differential Pressure Method |
| Measurement Range | 0–4000 mg/L |
| Accuracy | Compliant with HJ 505–2009 and ISO 5815-1:2019 for BOD₅ determination (validated using glucose-glutamic acid standard solution, BOD₅ = 180–230 mg/L) |
| Sample Capacity | Up to 6 samples per run |
| Incubation Duration | Programmable from 1 to 30 days |
| Data Retention | 10 years of BOD₅ result records |
| Cultivation Vessel Volume | 580 mL |
| Temperature Control | 20 ± 1 °C |
| Power Supply | AC 110–220 V, 50/60 Hz |
| Rated Power | 10 W |
| Dimensions (W × D × H) | 272 × 185 × 75 mm |
| Net Weight | 2.4 kg |
| Brand | Leici |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Regional Classification | Domestic (China) |
| Model | COD-571 |
| Instrument Type | Benchtop Laboratory Analyzer |
| Measurement Principle | Dichromate Digestion Method (2-hour standard digestion per ISO 6060 / HJ 828–2017) |
| Wavelengths | 420 nm and 620 nm |
| Measurement Ranges | 0–150 mg/L (low-range), 0–1500 mg/L (high-range) |
| Accuracy | ±8% of reading |
| Repeatability | ≤3% RSD |
| Measurement Time | ~20 min post-digestion |
| Throughput | Batch analysis of multiple water samples |
| Absorbance Range | 0.000–2.000 Abs |
| Absorbance Accuracy | ±0.01 Abs or ±5% |
| Absorbance Repeatability | ≤0.005 Abs or 2% |
| Wavelength Accuracy | ±4 nm |
| Transmittance Error | ±2% |
| Transmittance Repeatability | ≤0.5% |
| Cuvette Compatibility | 10 mm square cuvettes and 16 mm round test tubes |
| Data Storage | 2000 measurement records with timestamp, sample ID, dilution factor, and calibration metadata |
| Connectivity | RS-232, USB-B, optional U disk export |
| Power Supply | AC 100–240 V input / DC 24 V output adapter |
| Dimensions | 302 × 205 × 122 mm |
| Weight | 1.33 kg |
| Brand | Leici |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Regional Classification | Domestic (China) |
| Model | COD-572 |
| Price Range | USD 700 – 1,400 (FOB Shanghai) |
| Instrument Type | Benchtop Laboratory Analyzer |
| Measurement Principle | Coulometric Titration (ASTM D1252–04, ISO 8467:1993 compliant) |
| COD Range | (0.0–100.0) mg/L (standard), extendable to (100.0–1000) mg/L via dilution or high-range mode |
| Accuracy | ±2 mg/L (absolute error at ≤100 mg/L) |
| Repeatability | RSD ≤ 2% |
| Power Supply | AC 220 V ±10%, 50 Hz ±1% |
| Dimensions (W×D×H) | 300 × 235 × 100 mm |
| Weight | 3.0 kg |
| Brand | Leici |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Regional Classification | Domestic (China) |
| Model | COD-580 |
| Instrument Type | Online Analyzer |
| Measurement Principle | Electrochemical Oxidation (Hydroxyl Electrode Method) |
| Measurement Range | 10.0–1000 mg/L |
| Resolution | 0.1 mg/L |
| Accuracy | ±5% of Full Scale (FS) |
| Repeatability | ≤3% FS |
| Zero Drift | ±5 mg/L per 24 h |
| Span Drift | ±10% per 24 h |
| Power Supply | AC 220 V ±10%, 50 Hz ±1% |
| Dimensions (W×D×H) | 600 × 455 × 720 mm |
| Weight | 50 kg |
| Interface Options | RS-232 standard |
| Display | 7-inch color touchscreen with Chinese UI |
| Brand | Leici |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Original Equipment Manufacturer (OEM) |
| Product Category | Domestic |
| Model | COD-583 |
| Pricing | USD 12,300 (FOB Shanghai) |
| Measurement Principle | Potassium Permanganate Oxidation with ORP Endpoint Detection |
| Instrument Type | Online Continuous Analyzer |
| Repeatability | ≤ ±5% RSD |
| Accuracy | ±10% of reading (as per GB/T 11892–1989) |
| Power Failure Recovery | Yes |
| Remote Connectivity | Ethernet & Modbus TCP |
| Calibration Verification | Automated Zero & Span Check |
| Fluidic Architecture | Sequential Injection with Multi-Position Rotary Valve |
| Tubing Material | FEP (fluorinated ethylene propylene), ID ≥ 1.0 mm |
| Diagnostic Capability | Embedded Self-Diagnostic Routine |
| Maintenance Interval | ≥ 30 days under standard operation |
| Brand | Leici |
|---|---|
| Origin | Shanghai, China |
| Model | DGB-401 |
| Instrument Type | Portable/HANDHELD Water Quality Analyzer |
| Detection Principle | Spectrophotometry (LED-based, 420 nm / 470 nm / 620 nm / 650 nm) |
| Measured Parameters | Ammonia-Nitrogen, High-Range COD, Low-Range COD, Total Phosphorus, Total Nitrogen |
| Ammonia-Nitrogen Range | 0.000–10.00 mg/L |
| Repeatability | ±3% |
| IP Rating | IP65 |
| Data Storage | 1,000 total entries (200 per parameter) |
| Power Supply | Rechargeable Li-ion battery with USB/PC charging and low-voltage warning |
| Interface | RS-232 printer port, USB for PC communication |
| Compliance | GLP-compliant data traceability, audit-ready data management |
| Brand | Leici |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Original Equipment Manufacturer (OEM) |
| Country of Origin | China |
| Model | DGB-401 |
| Instrument Type | Portable / Handheld Water Quality Analyzer |
| Measurable Parameters | Total Phosphorus, Low-Range COD, High-Range COD, Total Nitrogen, Ammonia-Nitrogen |
| Light Sources | 420 nm, 470 nm, 620 nm, 650 nm LEDs |
| Calibration Points | 2–6 points |
| Data Storage | 1,000 total entries (200 per parameter) |
| Optical Cell | 16 mm and 25 mm round cuvettes |
| Power Supply | Rechargeable Li-ion battery (DC 5 V input, AC 100–240 V compatible) |
| Protection Rating | IP65 |
| Dimensions | 100 × 240 × 80 mm |
| Weight | 0.6 kg |
| Measurement Principles | Nesslerization (NH₃-N), Dichromate Oxidation (COD), Molybdate Blue (TP), Alkaline Persulfate Digestion + Chromotropic Acid (TN) |
| Compliance | GLP-compliant data traceability, RS-232 and USB interfaces for audit-ready data export |
| Brand | Leici |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Regional Classification | Domestic (China) |
| Model | DGB-402A |
| Instrument Type | Portable |
| Measurement Principle | DPD Colorimetric Spectrophotometry (515 nm LED) |
| Measured Parameters | Residual Chlorine, Total Chlorine |
| Range | (0.02–3.00) mg/L |
| Accuracy | ±3% or ±0.02 mg/L |
| Repeatability | ≤1% RSD |
| Resolution | 0.01 mg/L (concentration), 0.001 ABS (absorbance) |
| LOD | ≤0.02 mg/L |
| Light Source | Long-life 515 nm LED |
| Calibration | Single-point calibration with built-in standard curves and user-defined calibration support |
| Data Storage | 200 measurement records with review/delete functions |
| Power Supply | Rechargeable Li-ion battery |
| Dimensions & Weight | 80 × 200 × 75 mm, 0.4 kg |
| Enclosure Rating | IP65 |
| Accessories Included | DPD reagent kits for residual/total chlorine, portable protective carrying case, USB cable, AC adapter, and calibration standards |
| Brand | Leici |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Product Origin | Domestic (China) |
| Model | DGB-402F |
| Instrument Type | Portable |
| Measurement Principle | DPD Spectrophotometry |
| Measured Parameters | Residual Chlorine, Total Chlorine |
| Range | 0–3.00 mg/L (Residual & Total Chlorine) |
| Accuracy | ±3% or ±0.02 mg/L |
| Repeatability | ≤1.0% |
| Resolution | 0.001 mg/L (Concentration), 0.001 ABS (Absorbance) |
| LOD | ≤0.02 mg/L |
| Wavelength | 515 nm |
| Calibration | 1–3 Point Calibration |
| Data Storage | 200 Sets Each for Residual and Total Chlorine |
| Cuvette Size | 25 mm Round Cell |
| Operating Temperature | 5–35 °C |
| Relative Humidity | ≤85% RH |
| Power Supply | Rechargeable Lithium Battery |
| Dimensions (L×W×H) | 230 × 85 × 50 mm |
| Weight | ~0.5 kg |
| IP Rating | IP65 |
| Brand | Leici |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Product Category | Domestic (China-Made) |
| Model | DGB-403F |
| Instrument Type | Portable |
| Measurement Principle | DPD Colorimetric Spectrophotometry (515 nm & 420 nm LED Sources) |
| Measured Parameters | Residual Chlorine (LR/HR), Total Chlorine (LR/HR), Chlorine Dioxide (LR/HR), Monochloramine (LR/HR), Chlorite, Chlorate, Hydrogen Peroxide |
| Residual Chlorine HR Range | 0.20–12.0 mg/L |
| Accuracy (Residual Cl₂ HR) | ±0.1 mg/L or ±5% |
| Repeatability (Residual Cl₂ HR) | ≤1% |
| Resolution (Residual Cl₂ HR) | 0.1 mg/L |
| LOD (Residual Cl₂ HR) | ≤0.2 mg/L |
| Brand | Leici |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Manufacturer |
| Country of Origin | China |
| Model | DGB-405F |
| Instrument Type | Portable / Handheld Water Quality Analyzer |
| Measured Parameter | Water Hardness |
| Measurement Principle | Calcium-Magnesium Colorimetry (at 515 nm) |
| Range | (3.00–20.0) mg/L, (20.0–100) mg/L, (100–500) mg/L as CaCO₃ |
| Accuracy | ±5% or ±3 mg/L as CaCO₃ |
| Repeatability | ≤2.0% |
| LOD | <3 mg/L as CaCO₃ |
| Operating Temp. | 5–35 °C |
| RH | ≤85% |
| Power | Rechargeable Li-ion battery |
| Dimensions | 100 × 245 × 90 mm |
| Weight | ~0.5 kg |
| IP Rating | IP65 |
| Data Storage | 600 groups (200 per range) |
| Interface | USB, RS-232 |
| Compliance | GLP-compliant data traceability |
| Brand | Leici |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Regional Origin | Domestic (China) |
| Model | DGB-422 |
| Instrument Type | Portable |
| Measurement Principle | Colorimetry |
| Measurement Range | 0.000–500.0 mg/L |
| Accuracy | ±5 mg/L |
| Display | Backlit LCD with Adjustable Contrast & Backlight Duration |
| Protection Rating | IP65 |
| Calibration | Up to 5-point calibration |
| Data Management | GLP-compliant storage, recall, deletion, and print export |
| Power Supply | 4 × AA alkaline batteries or USB-powered |
| Interface | USB for PC/printer connectivity |
| Operating Environment | 5–35 °C, 0–85% RH |
| Dimensions | 220 × 85 × 50 mm |
| Weight | ~0.4 kg |
| Cuvette Specification | Ø16 mm × 100 mm, 10 mL capacity |
| Brand | Leici |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Manufacturer |
| Country of Origin | China |
| Model | DGB-423 |
| Instrument Type | Portable / Handheld Water Quality Analyzer |
| Measured Parameter | Ammonia-Nitrogen (NH₃-N) |
| Measurement Method | Nesslerization |
| Light Source | 420 nm LED |
| Range | 0.000–4.000 mg/L NH₃-N |
| Accuracy | ±10% of reading |
| Repeatability | ≤3% RSD |
| Sample Vessel | 16 mm OD × 100 mm glass cuvette (10 mL capacity) |
| Dimensions | 220 × 85 × 50 mm |
| Weight | ~0.4 kg |
| Operating Environment | 5–35 °C, 0–85% RH |
| Power Supply | 4 × AA alkaline batteries or USB 5 V DC |
| Display | Backlit LCD with adjustable contrast and backlight timeout |
| Protection Rating | IP65 |
| Data Management | GLP-compliant storage, review, deletion, and print export via USB |
| Calibration | Up to 5-point user-defined calibration |
| Firmware Upgradeable | Yes |
| Brand | LeiCi |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Original Equipment Manufacturer (OEM) |
| Product Category | Domestic |
| Model | DGB-480 |
| Instrument Type | Portable / Handheld Water Quality Analyzer |
| Detection Parameters | Turbidity, Color, Transmittance, Ozone, Nitrite Nitrogen, Urea, Hexavalent Chromium, Manganese, Total Nitrogen, Nitrate Nitrogen, Nitrate, Formaldehyde, Water Hardness, Zinc, Nitrite, Free Chlorine, Total Chlorine, Chlorine Dioxide, Permanganate Index, Low-Concentration COD<sub>Cr</sub>, High-Concentration COD<sub>Cr</sub>, Cadmium, Ammonia Nitrogen, Ammonium Ion, Total Phosphorus, Total Phosphate, Nickel, Ferrous Ion, Iron, Sulfite |
| Wavelengths | 365 nm, 420 nm, 470 nm, 515 nm, 540 nm, 620 nm, 650 nm, 850 nm |
| Measurement Modes | Concentration (mg/L), Absorbance (Abs), Transmittance (%) |
| Compliance | ISO 7027 (turbidity), GLP data traceability |
| Data Storage | 2000 records |
| Power Supply | Rechargeable Li-ion battery (DC 5 V input, AC 100–240 V adapter) |
| Dimensions | 105 × 241 × 90 mm |
| Weight | 0.6 kg |
| IP Rating | IP65 |
| Display | Color LCD touchscreen |
| Sample Vessels | Φ16 mm cuvettes or Φ25 mm vials |
| Brand | Leici |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Authorized Distributor |
| Country of Origin | China |
| Model | DGB-480 |
| Instrument Type | Portable / Handheld Water Quality Analyzer |
| Detection Principle | Colorimetry |
| Detection Parameters | Turbidity, Color, Transmittance Ratio, Ozone, Nitrite Nitrogen, Urea, Hexavalent Chromium, Manganese, Total Nitrogen, Nitrate Nitrogen, Nitrate, Formaldehyde, Water Hardness, Zinc, Nitrite, Free Chlorine, Total Chlorine, Chlorine Dioxide, Permanganate Index, Low-Concentration COD<sub>Cr</sub>, High-Concentration COD<sub>Cr</sub>, Cadmium, Ammonia Nitrogen, Ammonium Ion, Total Phosphorus, Total Phosphate, Nickel, Ferrous Ion, Iron, Sulfite |
| Measurement Range | Ammonia Nitrogen 0.03–10.00 mg/L |
| Repeatability | ≤0.5% |
| Brand | LeiCi |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Regional Classification | Domestic (China) |
| Model | DGS-450 |
| Instrument Type | Benchtop Laboratory Analyzer |
| Measurement Principle | Potassium Dichromate Digestion Method (for COD), Nesslerization (for Ammonia-N), Molybdate Blue Spectrophotometry (for Total Phosphorus), Alkaline Potassium Persulfate Digestion with Chromotropic Acid (for Total Nitrogen) |
| Wavelengths | 420 nm, 470 nm, 620 nm, 700 nm |
| COD Range | (0.000–1500) mg/L (extendable to 15,000 mg/L) |
| Ammonia-N Range | (0.000–10.00) mg/L (extendable to 100.0 mg/L) |
| Total Phosphorus Range | (0.000–1.000) mg/L (extendable to 10.00 mg/L) |
| Total Nitrogen Range | (0.000–30.00) mg/L (extendable to 300.0 mg/L) |
| Absorbance Range | (0.000–2.000) Abs |
| Wavelength Accuracy | ±4 nm |
| Transmittance Error | ±2% |
| Photometric Repeatability | ≤0.5% |
| Ammonia-N Accuracy | ±5% |
| COD & Total Phosphorus & Total Nitrogen Accuracy | ±8% (COD & TP), ±1 mg/L (≤10 mg/L TN) or ±5% (>10 mg/L TN) |
| Repeatability (all parameters) | ≤3% |
| Detection Limits | Ammonia-N ≤0.03 mg/L |
| Cell Format | 25 mm cuvette / 16 mm tube |
| Power Supply | AC 100–240 V input, DC 20 V output |
| Dimensions | 302 × 205 × 122 mm |
| Weight | 1.33 kg |
| Data Storage | 500 records per parameter |
| Interface | RS-232, USB-B, U-disk export support |