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| Brand | Dr-Water |
|---|---|
| Origin | Hunan, China |
| Model | Dr-W960 |
| Instrument Type | Portable |
| Biological Indicator | Bioluminescent Bacteria (Aliivibrio fischeri, Vibrio qinghaiensis, Photobacterium phosphoreum) |
| Operating Temperature | 10–40 °C (ambient) |
| Detection Time | ≤15 min post-sample preparation |
| Light Detection Range | 300–1100 nm |
| Photodetector | Silicon Photomultiplier (SiPM) |
| Display | 5″ IPS Capacitive Touchscreen (1024×768) |
| Power Supply | Rechargeable Li-ion Battery + AC Adapter |
| Data Connectivity | USB-C, Wi-Fi, Bluetooth 5.0, 4G LTE |
| Data Storage | ≥10 million test records |
| Compliance | ISO 11348-3, GB/T 15441-1995 |
| Toxicity Quantification | Relative Luminescence Inhibition (%) → Converted to Equivalent Toxic Unit (TU) or Reference Toxicant (e.g., ZnSO₄·7H₂O mg/L) |
| Accuracy | ±1% RSD (n=3, vs. certified reference standard) |
| Brand | Dr-Water |
|---|---|
| Origin | Hunan, China |
| Model | Dr-W100 |
| Instrument Type | Portable/HANDHELD Water Quality Analyzer |
| Detection Parameters | Turbidity, Color, Free Chlorine, Chlorine Dioxide, Total Hardness, Permanganate Index (COD<sub>Mn</sub>), Ammonia Nitrogen, Ozone, Urea, Iron, Manganese |
| Turbidity Ranges | 0–20 NTU / 0–200 NTU / 0–1000 NTU |
| Repeatability | ≤ ±2% |
| Accuracy | ≤ ±5% |
| Wavelength Range | 330–900 nm |
| Wavelength Accuracy | ±5 nm |
| Optical Resolution | 0.001 Abs |
| Optical Stability | ≤ ±0.005 Abs/20 min |
| Light Source | Imported Cold LED (Lifespan >100,000 h) |
| Sample Cell | 16 mm & 25 mm Cuvettes |
| Display | 5-inch HD Color Touchscreen |
| Power Supply | Rechargeable Li-ion Battery + AC Adapter |
| Data Storage | 1,000,000 Records |
| Connectivity | USB Type-C (Charging & Data Transfer) |
| Calibration Modes | Blank, Factor, and Calibration Curve |
| Readout Units | Concentration or Absorbance |
| Housing Material | Corrosion-Resistant ABS |
| Brand | DoctorWater |
|---|---|
| Origin | Hunan, China |
| Model | Dr-W510 |
| Instrument Type | Benchtop Laboratory Analyzer |
| Detection Principle | Photometric (Absorption Spectrophotometry) |
| Detectable Metals | Multi-parameter (e.g., Pb, Cd, Cr, Cu, Zn, Ni, As, Hg via compatible reagent kits) |
| Analysis Time | ≤10 minutes per sample |
| Accuracy | ≤±5% |
| Repeatability | ≤±2% |
| Wavelength Range | 330–900 nm |
| Wavelength Accuracy | ±5 nm |
| Absorbance Resolution | 0.001 Abs |
| Optical Stability | ≤±0.005 Abs / 20 min |
| Display | 8-inch HD color capacitive touchscreen |
| Language Support | English & Chinese |
| Sample Holders | Dual-position — 360° rotatable cuvette holder & standard 25 mm round cuvette slot |
| Light Source | Imported long-life cold LED (≥100,000 h) |
| Calibration Modes | Blank, Factor, and Calibration Curve |
| Data Storage | Up to 1,000,000 measurement records |
| Connectivity | USB interface |
| Output Modes | Concentration (mg/L, µg/L) or Absorbance (Abs) |
| Printer | Built-in thermal printer |
| Housing Material | Corrosion- and heat-resistant ABS |
| Dimensions (W×D×H) | 392 × 315 × 170 mm |
| Brand | WaterDoctor |
|---|---|
| Origin | Hunan, China |
| Model | Dr-T8100 |
| Instrument Type | Benchtop Laboratory Spectrophotometer |
| Detection Elements | Chromium (Cr) |
| Detection Time | 10 min per sample |
| Accuracy | ≤ ±5% |
| Absorbance Resolution | 0.001 Abs |
| Wavelength Range | 190–1100 nm |
| Wavelength Accuracy | ±1 nm |
| Wavelength Repeatability | < 0.2 nm |
| Spectral Bandwidth | 2 nm |
| Transmittance Error | ±0.5% |
| Transmittance Repeatability | ≤ 0.2% T |
| Absorbance Repeatability | ≤ ±2% |
| Optical System | Dual-beam with Grating Monochromator |
| Light Sources | Imported Deuterium Lamp (UV), Imported Tungsten-Halogen Lamp (Vis) |
| Display | 7-inch HD capacitive touchscreen |
| Sample Holders | Dual independent positions — cylindrical cuvette (360° rotational alignment) and rectangular quartz/glass cuvette |
| Preloaded Calibration Curves | 1200 built-in methods |
| Data Storage | 1,000,000 measurement records |
| Interface | USB port for data export |
| Software Language | Chinese UI standard |
| Brand | Dr-Water |
|---|---|
| Origin | Hunan, China |
| Manufacturer Type | Authorized Distributor |
| Country of Origin | China |
| Model | Dr-W690 |
| Detection Principle | Chlorophyll Fluorescence Method |
| Chlorophyll a Range | 0.01–500 µg/L |
| Cyanobacteria Range | 0–50 × 10⁶ cells/L |
| Detection Limit | 0.01 µg/L (Chl-a) / 1 × 10⁴ cells/L (Cyanobacteria) |
| Accuracy | ±5% FS |
| Resolution | 0.01 µg/L (Chl-a), 1 × 10⁴ cells/L (Cyanobacteria) |
| Measurement Time | 20 s |
| Display | 8-inch HD color TFT capacitive touchscreen |
| Sample Cell | Dedicated 10-mm square quartz cuvette |
| Data Storage | 1,000,000 records with timestamp, ID, and operator tag |
| Connectivity | USB 2.0 interface |
| Power Supply | AC 220 V ±10%, 50 Hz |
| Operating Environment | 5–40 °C, RH <85% non-condensing |
| Housing Material | Flame-retardant ABS with IP54-rated enclosure |
| Brand | DoctorWater |
|---|---|
| Origin | Hunan, China |
| Model | W600 |
| Detection Principle | Chlorophyll Fluorescence Method |
| Chlorophyll-a Range | 0.01–500 µg/L |
| Detection Limit | 0.01 µg/L |
| Cyanobacteria Range | 0–40 × 10⁶ cells/L |
| Resolution | 1 × 10⁴ cells/L (cyanobacteria), 0.01 µg/L (chlorophyll-a) |
| Accuracy | ±5% |
| Display | 8-inch IPS capacitive touchscreen (1024 × 768) |
| Operating System | Android-based embedded OS |
| Power | Rechargeable Li-ion battery + AC adapter |
| Data Storage | ≥10 million records |
| Connectivity | USB, Wi-Fi, Bluetooth, 4G |
| Compliance | Designed for field-deployable water quality monitoring per ISO 10260, ASTM D3921, and EPA Method 445.0 (fluorometric chlorophyll-a) |
| Brand | DoctorWater |
|---|---|
| Origin | Hunan, China |
| Model | Dr-W120 |
| Instrument Type | Portable |
| Measurement Principle | Optical (LED-based colorimetric method with interference-compensated photometry) |
| Measurement Range (DO) | 0.20–15.00 mg/L |
| Accuracy | ≤ ±5% |
| Repeatability | ≤ ±2% |
| Detection Limit | 0.20 mg/L |
| Wavelength Range | 330–900 nm |
| Wavelength Accuracy | ±5 nm |
| Absorbance Resolution | 0.001 Abs |
| Optical Stability | ≤ ±0.005 Abs/20 min |
| Display | 5-inch HD color capacitive touchscreen |
| Power Supply | Rechargeable Li-ion battery + AC adapter |
| Data Storage | 1,000,000 measurement records |
| Interface | USB Type-C (charging & data transfer) |
| Calibration Modes | Blank, Factor, and Curve calibration |
| Language Support | English / Chinese switchable |
| Sample Format | 16 mm and 25 mm round cuvettes |
| Light Source | Imported long-life cold LED (≥100,000 h) |
| Housing Material | Corrosion-resistant ABS |
| Printer | Built-in thermal printer |
| Readout Units | mg/L, ppm, or Abs |
| Brand | DoctorWater |
|---|---|
| Origin | Hunan, China |
| Model | Dr-T9020 |
| Instrument Type | Laboratory Benchtop Analyzer |
| Measurement Principle | Optical (LED-based Photometry) + Electrochemical (Galvanic/Clark-type DO Sensor) |
| Measurement Range (DO) | 0–20 mg/L |
| Accuracy (DO) | ≤ ±5% FS |
| Repeatability (DO) | ≤ ±2% FS |
| Detection Limit (DO) | Not Specified |
| Wavelength Range | 340–900 nm |
| Wavelength Accuracy | ±1 nm |
| Spectral Bandwidth | 4 nm |
| Absorbance Resolution | 0.001 Abs |
| Photometric Stability | ≤ ±0.005 Abs/20 min |
| Preloaded Calibration Curves | 1000+ |
| Data Storage Capacity | 1,000,000 measurements |
| Display | 8-inch HD capacitive touchscreen |
| Interface Language | Chinese (English optional) |
| Sample Holders | Rotatable 16-mm tube position + dual cuvette positions (10 mm & 30 mm pathlength) + 4 independent digital electrode ports |
| Power Supply | AC 100–240 V, 50/60 Hz |
| Dimensions (W×D×H) | 392 × 315 × 170 mm |
| Weight | 4.4 kg |
| Brand | DoctorWater |
|---|---|
| Origin | Hunan, China |
| Model | Dr-W121 |
| Instrument Type | Portable |
| Wavelength Range | 330–900 nm |
| Wavelength Accuracy | ±5 nm |
| Photometric Accuracy | ≤±5% |
| Repeatability | ≤±2% |
| Absorbance Resolution | 0.001 Abs |
| Optical Stability | ≤±0.005 Abs/20 min |
| Detector System | Automatic Wavelength Positioning Optical Detection System |
| Display | 5-inch HD Color Touchscreen |
| Sample Format | 16 mm & 25 mm Cuvettes |
| Light Source | Imported Cold LED (Lifespan >100,000 h) |
| Power Supply | Rechargeable Li-ion Battery + AC Adapter |
| Data Storage Capacity | 1,000,000 Measurements |
| Connectivity | USB Type-C (Charging & Data Transfer) |
| Calibration Modes | Blank, Factor, and Calibration Curve |
| Readout Units | Concentration (mg/L) or Absorbance (Abs) |
| Housing Material | Corrosion-Resistant ABS |
| Brand | Doctor Water |
|---|---|
| Origin | Hunan, China |
| Model | Dr-T9010 |
| Instrument Type | Laboratory Benchtop Analyzer |
| Measurement Principle | Rapid Digestion Spectrophotometry (COD) & Nesslerization or Salicylate Method (Ammonia-N) |
| Wavelength Range | 340–900 nm |
| Wavelength Accuracy | ±1 nm |
| Wavelength Repeatability | <0.2 nm |
| Spectral Bandwidth | 4 nm |
| Photometric Accuracy | ±0.5% T |
| Photometric Repeatability | ≤0.2% T |
| Absorbance Resolution | 0.001 Abs |
| Optical Stability | ≤±0.005 Abs/20 min |
| Detection Range (COD) | 2–20,000 mg/L |
| Detection Range (NH₃-N) | 0.02–100 mg/L (configurable per method) |
| Accuracy | ≤±5% |
| Repeatability | ≤±2% |
| LOD (COD) | 2 mg/L |
| Measurement Time | ≤10 min (post-digestion) |
| Calibration | Single- or Multi-point with Pre-stored Curves (n=1000) |
| Display | 8-inch HD Capacitive Touchscreen |
| Data Storage | 1,000,000 records |
| Interface | USB-A for U-disk export & thermal printer |
| Power Supply | AC 100–240 V, 50/60 Hz |
| Dimensions | 392 × 315 × 170 mm |
| Weight | 4.4 kg |
| Housing Material | Flame-retardant ABS with Chemical Resistance |
| Brand | DoctorWater |
|---|---|
| Model | Dr-T9905 |
| Type | Portable/Water Quality Analyzer |
| Detection Principle | Dual-Mode Photometric & Electrochemical |
| Measurable Parameters | COD (2–20,000 mg/L), Ammonia-N, Total Phosphorus, Total Nitrogen, Heavy Metals, pH, Dissolved Oxygen, Conductivity, Turbidity, Temperature, ORP, TDS, Chlorophyll-a, Phycocyanin, SS, Residual Chlorine, Oil-in-Water, Salinity |
| 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 |
| Absorbance Resolution | 0.001 Abs |
| Optical Stability | ≤±0.005 Abs/20 min |
| Pre-stored Calibration Curves | 600 |
| Data Storage Capacity | 1,000,000 records |
| Display | 5-inch HD capacitive touchscreen |
| Power Supply | Rechargeable Li-ion battery + AC adapter |
| Compliance | GB 11893–1989 (Total Phosphorus), GB/T 11894–1989 (Total Nitrogen), ISO 7027, ASTM D5810, EPA Method 351.2 (adapted) |
| Brand | Water Doctor |
|---|---|
| Origin | Hunan, China |
| Model | Dr-W5000 |
| Instrument Type | Portable |
| Measurement Principle | Ultraviolet Fluorescence Spectrometry |
| Measurement Range | 0.005–1500 mg/L (as petroleum hydrocarbons) |
| Detection Limit | 0.005 mg/L |
| Accuracy | ±5% of reading |
| Detector | UV-optimized photomultiplier tube (PMT) with excitation at 254 nm and emission detection at 365 nm |
| Measurement Time | ≤120 seconds per sample |
| Display | 5-inch high-resolution color TFT touchscreen |
| Power Supply | Rechargeable lithium-ion battery (standby >30 days |
| Data Storage | 1,000,000 measurement records with timestamp, sample ID, and calibration history |
| Connectivity | USB 2.0 for data export and firmware update |
| Operating Environment | 5–40 °C, relative humidity <85% RH (non-condensing) |
| Sample Vessel | Dedicated quartz-cuvette-compatible disposable glass tubes (10 mm pathlength) |
| Extraction Solvent | n-Hexane (ASTM D7066-compliant) |
| Auto-Sleep | Activated after 5 minutes of inactivity |
| Built-in Thermal Printer | Yes |
| Color Compensation Algorithm | Real-time spectral correction for chromophoric interference |
| Onboard Calibration Module | User-accessible zero/span and multi-point calibration routines |
| Compliance | Designed to support ASTM D7678, ISO 9377-2, and EPA Method 1664B workflows (extraction-dependent) |
| Brand | Water Doctor |
|---|---|
| Origin | Hunan, China |
| Model | Dr-W660 |
| Measurement Principle | In-situ Fluorescence Detection |
| Chlorophyll-a Range | 0.01–500 µg/L |
| Phycocyanin (Cyanobacteria) Range | 0–40 × 10⁶ cells/L |
| Detection Limit | 0.01 µg/L (Chl-a), 1 × 10⁴ cells/L (Cyanobacteria) |
| Resolution | 0.01 µg/L (Chl-a), 10⁴ cells/L (Cyanobacteria) |
| Accuracy | ±5% FS |
| Display | 5-inch HD color capacitive touchscreen |
| Power | Rechargeable Li-ion battery (≥30-day standby), AC adapter support |
| Data Storage | 1,000,000 records |
| Interface | USB 2.0 |
| Printer | Integrated thermal printer |
| Sample Cell | 10 mm square quartz cuvette |
| Housing Material | Corrosion-resistant ABS |
| Operating Temp | 5–40 °C |
| Relative Humidity | <85% RH (non-condensing) |
| Compliance | Designed for field-deployable compliance with ISO 10260 (water quality — determination of chlorophyll-a by fluorescence), ASTM D7212-19 (standard test method for chlorophyll-a in water by fluorometric measurement) |
| Brand | Water Doctor |
|---|---|
| Origin | Hunan, China |
| Manufacturer Type | Authorized Distributor |
| Country of Origin | China |
| Model | Dr-M5100 |
| Instrument Type | Laboratory Benchtop Analyzer |
| Principle | Infrared Spectrophotometry (Triple-Wavelength Absorption at 2930 cm⁻¹, 2960 cm⁻¹, and 3030 cm⁻¹) |
| Measurement Range | 0.0–800 mg/L (water matrix) |
| Detection Limit | 3σ ≤ 0.03 mg/L (based on 11 blank measurements) |
| Accuracy | ±2% relative error |
| Wavenumber Range | 2400–3400 cm⁻¹ (equivalent to 2941–4167 nm) |
| Wavenumber Accuracy | ±1 cm⁻¹ |
| Absorbance Range | 0.0000–2.0000 AU (T = 100%–1%) |
| Extraction Solvents | Perchloroethylene or Carbon Tetrachloride (compliant with HJ 637–2018) |
| Brand | Water Doctor (DoctorWater) |
|---|---|
| Origin | Hunan, China |
| Model | Dr-W900 |
| Instrument Type | Portable |
| Biological Indicator | Bioluminescent Bacteria (Aliivibrio fischeri, Photobacterium phosphoreum, Vibrio qinghaiensis) |
| Operating Ambient Temperature | 10–40 °C |
| Reagent Storage Temperature | 2–8 °C (adjustable, ±1 °C accuracy) |
| Detection Temperature Control | 15–25 °C (adjustable, ±1 °C accuracy) |
| Incubation Capacity | 10 sample positions with independent temperature control |
| Detection Time | ≤15 minutes post-sample preparation |
| Compliance | GB/T 15441–1995, ISO 11348-3 |
| Brand | DoctorWater |
|---|---|
| Origin | Hunan, China |
| Model | Dr-WCl |
| Instrument Type | Portable |
| Measurement Principle | DPD Colorimetric Spectrophotometry |
| Measuring Parameter | Free Chlorine (Residual Chlorine) |
| Range | 0.02–2.00 mg/L |
| Accuracy | ≤ ±5% |
| Repeatability | ≤ ±2% |
| Resolution | 0.001 mg/L |
| LOD | 0.02 mg/L |
| Wavelength Range | 330–900 nm |
| Wavelength Accuracy | ±5 nm |
| Optical Stability | ≤ ±0.005 Abs/20 min |
| Display | 5-inch HD color TFT touchscreen |
| Light Source | Imported long-life cold LED (≥100,000 h) |
| Sample Cell | 16 mm and 25 mm round cuvettes |
| Calibration Modes | Blank, Factor, and Calibration Curve |
| Data Storage | Up to 1,000,000 records |
| Power Supply | Rechargeable Li-ion battery + AC adapter |
| Interface | USB Type-C (charging & data transfer) |
| Print Output | Built-in thermal printer |
| Readout Modes | Concentration (mg/L) and Absorbance (Abs) |
| Housing Material | Corrosion- and heat-resistant ABS |
| Brand | DoctorWater |
|---|---|
| Origin | Hunan, China |
| Model | Dr-T8000 |
| Instrument Type | Laboratory Water Quality Analyzer |
| Detection Principle | Spectrophotometry (UV-Vis) |
| Measurable Parameters | COD, Ammonia Nitrogen, Total Phosphorus, Total Nitrogen, Turbidity, Color, Suspended Solids, Heavy Metals, and >50 additional water quality indicators |
| Wavelength Range | 190–1100 nm |
| Wavelength Accuracy | ±1 nm |
| Wavelength Repeatability | <0.2 nm |
| Spectral Bandwidth | 2 nm |
| Photometric Accuracy (Transmittance) | ±0.5% |
| Photometric Repeatability | ≤0.2% T |
| Absorbance Resolution | 0.001 Abs |
| COD Range | 2–20,000 mg/L |
| Measurement Repeatability | ≤±2% |
| Optical System | Dual-beam with Grating Monochromator |
| Light Sources | Imported Deuterium Lamp (UV), Imported Tungsten-Halogen Lamp (Vis) |
| Display | 7-inch HD capacitive touchscreen |
| Sample Holders | Dual independent positions — for 16-mm round cuvettes (360° rotational detection) and standard 10-mm square cuvettes |
| Calibration | Single-point and multi-point calibration |
| Pre-stored Calibration Curves | 1200+ (compliant with HJ/T 399–2007, HJ 535–2009, GB 11893–1989, HJ 636–2012) |
| Data Storage | 1,000,000 measurement records |
| Output | Built-in thermal printer |
| Interface | USB port for data export |
| Compliance | Designed to meet Chinese environmental monitoring standards |
| Brand | DoctorWater |
|---|---|
| Origin | Hunan, China |
| Model | Dr-YZ60 |
| Instrument Type | Portable/HANDHELD Water Quality Analyzer |
| Detection Parameters | pH, Dissolved Oxygen (DO), Ammonia Nitrogen (NH₃-N), Nitrate Nitrogen (NO₃⁻-N), Nitrite Nitrogen (NO₂⁻-N), Water Temperature |
| pH Measurement Range | 6.5–8.5 pH |
| Repeatability | ≤ ±2% |
| Accuracy | ≤ ±5% |
| Wavelength Range | 330–900 nm |
| Wavelength Accuracy | ±5 nm |
| Optical Resolution | 0.001 Abs |
| Optical Stability | ≤ ±0.005 Abs/20 min |
| Light Source | Imported Cold Light LED (Lifespan > 100,000 h) |
| Sample Cell | 16 mm & 25 mm Cuvettes |
| Display | 5-inch HD Color Touchscreen |
| Power Supply | Rechargeable Li-ion Battery + AC Adapter |
| Data Storage Capacity | 1,000,000 Records |
| Interface | USB Type-C (Charging & Data Transfer) |
| Calibration Modes | Blank, Factor, and Calibration Curve |
| Readout Modes | Concentration & Absorbance |
| Housing Material | Corrosion-Resistant ABS |
| Printing | Built-in Thermal Printer |
| Language Support | English & Chinese |
| Brand | Water Doctor |
|---|---|
| Origin | Hunan, China |
| Manufacturer Type | Authorized Distributor |
| Country of Origin | China |
| Model | Dr-M1102 |
| Instrument Type | Portable |
| Measurement Principle | Electrochemical (Ion-Selective Electrode) |
| Range | 0–100 mg/L NH₃–N |
| Accuracy | ±10% FS |
| Detection Limit | 0 mg/L (defined by electrode sensitivity and signal-to-noise ratio) |
| Measurement Time | ≤60 s per parameter |
| Simultaneous Channels | 6 independent electrode ports |
| Display | 8-inch HD color capacitive touchscreen |
| Data Storage | 1,000,000 measurement records with timestamp, location (optional GPS), and electrode ID |
| Power Supply | Rechargeable Li-ion battery (≥12 h continuous operation) |
| IP Rating | IP68 for electrodes |
| Operating Environment | 0–50 °C, ≤85% RH (non-condensing) |
| Connectivity | USB 2.0, optional Bluetooth 5.0 module |
| Software Compliance | Audit-trail enabled logging, user-access levels, data export in CSV/Excel format |
| Brand | DoctorWater |
|---|---|
| Origin | Hunan, China |
| Model | Dr-M5600 |
| Instrument Type | Portable |
| Measurement Principle | Infrared Spectrophotometry (Fourier-transform-free dispersive IR) |
| Measurement Range | 0.0–800 mg/L (oil in water) |
| Detection Limit | 3SD ≤ 0.03 mg/L (based on 11 blank measurements) |
| Wavenumber Accuracy | ±1 cm⁻¹ |
| Absorbance Resolution | 0.0001 AU |
| Scan Speed | Full-spectrum acquisition in 30 seconds |
| Wavenumber Range | 2400–3400 cm⁻¹ |
| Absorbance Range | 0.0000–2.0000 AU |
| Repeatability | RSD ≤ 0.5% (20–80 mg/L standard), RSD ≤ 5% (0.2 mg/L sample) |
| Linearity | R > 0.999 |
| Calibration | Preloaded EPA- and HJ-compliant calibration curves |
| Power Supply | Integrated rechargeable Li-ion battery + AC 220 V |
| Display | 10.1″ capacitive touchscreen |
| Data Output | Thermal printer + USB interface |
| Brand | Water Doctor |
|---|---|
| Origin | Hunan, China |
| Manufacturer Type | Authorized Distributor |
| Product Category | Domestic |
| Model | Dr-M1202P |
| Instrument Type | Portable |
| Measurement Principle | Electrochemical (Ion-Selective Electrode, ISE) |
| Measurement Range | 0–100 mg/L NH₃–N |
| Accuracy | ±10% of reading |
| Detection Limit | 0 mg/L (defined by electrode sensitivity and signal-to-noise ratio) |
| Measurement Time | ≤60 seconds per sample |
| Sample Throughput | Three independent electrode measurement positions |
| Display | 5-inch HD color TFT touchscreen |
| Language Support | English & Chinese |
| Data Storage | Up to 1,000,000 measurement records |
| Power Supply | Rechargeable Li-ion battery + USB Type-C AC/DC adapter (dual-mode operation) |
| Electrode Protection Rating | IP68 |
| Operating Environment | 0–50 °C, ≤85% RH (non-condensing) |
| Electrode Cable Length | 3–5 m (customizable) |
| Built-in Thermal Printer | Yes |
| Data Interface | USB Type-C (for charging, data export, and firmware update) |
| Reading Modes | Real-time, Timed, and Interval |
| Auto Temperature Compensation | Yes |
| Sleep Mode | Configurable idle timeout |
| Brand | Water Doctor |
|---|---|
| Origin | Hunan, China |
| Model | Dr-WCI |
| Instrument Type | Benchtop Laboratory Analyzer |
| Measurement Principle | DPD Colorimetric Spectrophotometry (ASTM D1253, ISO 7393-2, EPA 330.5) |
| Measuring Parameter | Free Chlorine (Residual Chlorine) |
| Range | 0.02–2.00 mg/L as Cl₂ |
| Accuracy | ≤ ±5% of reading |
| Repeatability | ≤ ±2% RSD |
| Detection Limit | 0.02 mg/L |
| Absorbance Resolution | 0.001 Abs |
| Wavelength Range | 330–900 nm |
| Wavelength Accuracy | ±5 nm |
| Optical Stability | ≤ ±0.005 Abs / 20 min |
| Display | 8-inch HD capacitive touchscreen |
| Language Support | English & Chinese |
| Sample Holders | Rotatable 16-mm cuvette position + fixed 25-mm cuvette position |
| Calibration Modes | Blank, Factor, and Multi-point Curve Calibration |
| Data Storage | Up to 1,000,000 measurement records |
| Connectivity | USB port for data export |
| Output Modes | Concentration (mg/L) or Absorbance (Abs) |
| Printer | Built-in thermal printer |
| Housing Material | Flame-retardant ABS with chemical resistance |
| Dimensions (W×D×H) | 392 × 315 × 170 mm |
| Light Source | Long-life imported cold LED (rated >100,000 hours) |
| 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 | Dr-Water |
|---|---|
| Origin | Hunan, China |
| Model | Dr-W130 |
| Wavelength Range | 330–900 nm |
| Wavelength Accuracy | ±5 nm |
| Photometric Accuracy | ≤±5% |
| Repeatability | ≤±2% |
| Absorbance Resolution | 0.001 Abs |
| Optical Stability | ≤±0.005 Abs/20 min |
| Light Source | Imported Cold LED (Lifespan >100,000 h) |
| Display | 5-inch HD Color TFT Touchscreen |
| Sample Format | 16 mm & 25 mm Cuvettes |
| Calibration Modes | Blank, Factor, and Calibration Curve |
| Data Storage | Up to 1,000,000 Records |
| Power Supply | Rechargeable Li-ion Battery + AC Adapter |
| Interface | USB Type-C (Charging & Data Transfer) |
| Housing Material | Corrosion-Resistant ABS |
| Readout Modes | Concentration & Absorbance |
| Turbidity Measurement Modes | Standard, Low-Turbidity, Signal-Averaging, and Rapid-Settling |
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