Residual Chlorine and Chlorine Dioxide Analyzer
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| Brand | APURE |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Product Category | Domestic (China-made) |
| Model | A10CL-AA1 |
| Instrument Type | Online Controller |
| Measurement Parameter | Free Residual Chlorine |
| Measurement Range | 0.00–20.00 ppm |
| Accuracy | ±0.01 ppm |
| Resolution | 0.01 ppm |
| Stability | ≤0.02 ppm/24 h |
| Temperature Compensation | 0–100 °C (Manual / PT1000 / NTC10K) |
| Output Signal | Isolated 4–20 mA (Max Load: 500 Ω) |
| Alarm Output | Dual SPDT Relays (3 A / 250 V AC, NO contact) |
| Power Supply | AC 220 V or DC 24 V |
| Power Consumption | ≤5 W |
| Operating Environment | 0–60 °C, ≤85% RH |
| Dimensions (H×W×D) | 96×96×132 mm |
| Panel Cutout | 92.5×92.5 mm |
| Ingress Protection | IP65 |
| Brand | APURE |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Product Category | Domestic (China-Made) |
| Model | A20CL-AA1 |
| Instrument Type | Online Analyzer |
| Measurement Principle | Electrochemical Amperometric Sensor |
| Measured Parameter | Free Residual Chlorine |
| Range Options | 0–20 ppm / 0.0–20.0 ppm / 0.00–20.00 ppm |
| Accuracy | ±0.01 ppm |
| Resolution | 0.01 ppm |
| Stability | ≤0.02 ppm/24 h |
| Temperature Compensation | 0–100 °C (PT1000, NTC10K, or Manual) |
| Output Signals | Dual Isolated 4–20 mA (Chlorine & Temperature, max. load 500 Ω) |
| Relay Outputs | 3 Programmable SPDT Relays (3 A / 250 V AC, NO contact, adjustable hysteresis) |
| Power Supply | AC 220 V ±10% or DC 24 V ±10% |
| Power Consumption | ≤7 W |
| Operating Environment | 0–50 °C, ≤85% RH |
| Enclosure Dimensions | 144 × 144 × 115 mm (H × W × D) |
| Panel Cutout | 138 × 138 mm |
| Ingress Protection | IP65 |
| User Interface | Bilingual (Chinese/English), Menu-Driven Navigation |
| Security | Password-Protected Configuration Access |
| Brand | AQUALABO |
|---|---|
| Origin | France |
| Model | S200 |
| Instrument Type | Online Analyzer |
| Measurement Principle | Potentiometric (Gold Ring Electrode) |
| Measured Parameter | Chlorine Dioxide (ClO₂) |
| Range | ClO₂: 0.00–5.00 mg/L |
| pH | –2.00 to 16.00 |
| Temperature | –30.00 to 140.00 °C |
| Accuracy | ±2 % of full scale |
| Resolution | ClO₂: 0.01 mg/L |
| pH | 0.01 unit |
| Temperature | 0.1 °C |
| Response Time | ≤30 s |
| Max. Operating Pressure | 8 bar @ 20 °C |
| Max. Fluid Temperature | 70 °C |
| Flow Rate | 40–120 L/h |
| Sensor Material | Glass body with gold-ring working electrode |
| Enclosure Rating | IP65 |
| Power Supply | 110/230 VAC, ±10 %, 50/60 Hz |
| Power Consumption | 16 VA |
| Dimensions (Analyzer) | 160 × 165 × 85 mm |
| Weight | 1.1 kg |
| Display | 4×20-character backlit LCD |
| Analog Outputs | 2 × isolated 4–20 mA (max. 600 Ω load) |
| Digital Inputs | 2 (including pulse input for flow meter) |
| Relay Outputs | 3 configurable (NO/NC/C, 120–240 VAC, 2 A) |
| Digital Outputs | 2 programmable dry-contact outputs (≤12 V, 200 mA) |
| Control Functions | Dual independent on/off, P or PI control, pulse-pause, frequency, and continuous analog output modes |
| Operating Temp. | –20 to 55 °C (≤90 % RH at 40 °C, non-condensing) |
| Storage Temp. | –20 to 65 °C |
| Brand | AQUALABO |
|---|---|
| Origin | France |
| Model | S200 |
| Instrument Type | Online Analyzer |
| Measurement Principle | Amperometric (Gold Ring Electrode) + Potentiometric (pH Electrode) |
| Measured Parameters | Free Residual Chlorine, Total Active Chlorine, pH, Temperature |
| Range | Free Chlorine: 0.00–5.00 mg/L |
| Total Active Chlorine | 0.00–5.00 mg/L |
| pH | –2.00–16.00 |
| Temperature | –30–140 °C |
| Accuracy | ±2 % of full scale |
| Resolution | Chlorine: 0.01 mg/L |
| pH | 0.01 unit |
| Temperature | 0.1 °C |
| Response Time | ≤30 s |
| Max. Operating Pressure | 8 bar @ 20 °C |
| Flow Rate | 40–120 L/h |
| Sensor Material | Glass body / Gold working electrode |
| Temp. Sensor | Pt1000 |
| Enclosure Rating | IP65 |
| Power Supply | 110–230 VAC, 50/60 Hz |
| Power Consumption | 16 VA |
| Dimensions (W×H×D) | 160 × 165 × 85 mm |
| Weight | 1.1 kg |
| Operating Temp. | –20–55 °C, ≤90 % RH (non-condensing) |
| Storage Temp. | –20–65 °C |
| Analog Outputs | 2 × 4–20 mA (galvanically isolated, max. load 600 Ω) |
| Digital Interface | Modbus RTU Slave (RS485) |
| Relay Outputs | 3 configurable (NO/NC/C, 120–240 VAC, 2 A) |
| Digital Inputs | 2 (including pulse input for flow meter integration) |
| Control Modes | On/Off, P, PI, Pulse–Pause, Continuous (via analog output) |
| Brand | AQUALABO |
|---|---|
| Origin | France |
| Model | STAC CL |
| Instrument Type | Online Analyzer |
| Measurement Principle | UV Absorption Spectrophotometry (204–321 nm) |
| Measured Parameters | Free Chlorine (Cl₂), Total Chlorine, Chlorine Dioxide (ClO₂), Hydrogen Sulfide (H₂S) |
| Range | Cl₂ 4–3000 mg/L |
| Optical Path Length Options | 2 mm (Cl₂: 100–3000 ppm, H₂S LOD: 10 ppm), 5 mm (Cl₂: 40–1200 ppm, H₂S LOD: 4 ppm) |
| Spectrometer | UV Multichannel Spectrophotometer |
| Sample Flow | Gravity-fed, max. pressure 1 bar |
| Channels | 1 standard, up to 4 programmable sample channels + blank channel |
| Valves | 2–5 solenoid valves |
| Detection Method | Deconvolution-based spectral analysis using reference spectra libraries |
| Data Output | Four 4–20 mA analog outputs + RS232C interface |
| Operating Temperature | 15–40 °C |
| Sample Temp. | ≤40 °C |
| Sample Matrix | Natural or treated water, suspended solids <2 mm |
| Power Supply | 230 V AC, 50/60 Hz, 300 VA |
| Dimensions | 800 × 600 × 360 mm |
| Weight | 15 kg |
| Light Source | Deuterium lamp (rated for ≥100,000 measurements) |
| Memory Capacity | 4 spectral models + 255 measurement records |
| Software | UV PRO for model calibration, spectrum visualization, maintenance diagnostics |
| Origin | Canada |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Origin Category | Imported |
| Model | AVVOR 8000 |
| Price | Upon Request |
| Measurement Range | 0–10 ppm |
| Method | EPA 4500-Cl G (DPD Colorimetric) |
| Resolution | 0.01 ppm (0–6 ppm), 0.1 ppm (6–10 ppm) |
| Accuracy | ±2% (0–6 ppm), ±10% (6–10 ppm) |
| Response Time | 3 seconds |
| Power Supply | 4 × AAA Alkaline Batteries |
| Certification | CE |
| Light Source | LED @ 515 nm |
| Sample Volume | 5 mL |
| Origin | Canada |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Origin Category | Imported |
| Model | AVVOR 9000 |
| Price | Upon Request |
| Brand | AVVOR |
|---|---|
| Origin | Canada |
| Model | AVVOR 9000 |
| Measurement Range | 0–10 mg/L Cl₂ |
| Cycle Time | 110 s–10 min (adjustable) |
| Accuracy | ±5% or ±0.03 mg/L Cl₂ (0–6 mg/L) |
| Resolution | 0.01 mg/L |
| Method | EPA-approved DPD colorimetric analysis for free chlorine and total chlorine |
| Output | 4–20 mA analog + RS-485 with Modbus RTU protocol |
| Alarms | Two user-configurable concentration-based digital alarms |
| Operating Temperature | 5–40 °C |
| Inlet Pressure | 5–150 psi |
| Enclosure Rating | NEMA 4X / IP66 |
| Housing Material | ABS plastic |
| Power Supply | 100–240 V AC, auto-ranging, 47–63 Hz |
| Certifications | CE, UL, CSA, ETL, ETLc |
| Dimensions (L×W×H) | 41 × 41 × 26 cm |
| Weight | 3.6 kg |
| Brand | AVVOR |
|---|---|
| Origin | Canada |
| Model | AVVOR 9000 |
| Measurement Range | 0–10 mg/L Cl₂ |
| Cycle Time | 110 s – 10 min (user-selectable) |
| Accuracy | ±5% or ±0.03 mg/L Cl₂ (whichever is greater) for 0–6 mg/L |
| Resolution | 0.01 mg/L |
| Method | EPA-Approved DPD Colorimetric Analysis |
| Output | 4–20 mA analog + RS-485 with Modbus RTU protocol |
| Alarms | Two user-configurable concentration-based digital alarms |
| Operating Temperature | 5–40 °C |
| Inlet Pressure | 5–150 psi |
| Enclosure Rating | NEMA 4X / IP66 |
| Housing Material | ABS plastic |
| Power Supply | 100–240 V AC, auto-ranging, 47–63 Hz |
| Certifications | CE, UL, CSA, ETL, ETLc |
| Dimensions (L×W×H) | 41 × 41 × 26 cm |
| Weight | 3.6 kg |
| 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 | ERUN |
|---|---|
| Origin | Shaanxi, China |
| Model | ERUN-SZ4-K4 |
| Instrument Type | Online Analyzer |
| Measured Parameter | Chlorine Dioxide (ClO₂) |
| Measurement Range | 0–5 mg/L and 0–20 mg/L (dual-range) |
| Accuracy | ±3% of reading |
| Repeatability | ±3% |
| Resolution | 0.001 mg/L |
| Limit of Detection | 0.030 mg/L |
| Response Time (T90) | ≤90 s |
| Measurement Principle | Amperometric Electrochemical Detection (Three-Electrode System with Membrane-Covered Gold Working Electrode) |
| Temperature Range | −5 to 60 °C |
| Temp. Accuracy | ±0.4 °C |
| Temp. Resolution | 0.1 °C |
| Operating Voltage | DC 9–28 V |
| Power Consumption | ≤0.5 W (peak) |
| Output Options | RS485 (Modbus RTU), 4–20 mA (optional) |
| Enclosure Rating | IP68 |
| Pressure Rating | <0.1 MPa |
| Brand | GreenPrima |
|---|---|
| Origin | United Kingdom |
| Manufacturer Type | Original Equipment Manufacturer (OEM) |
| Product Category | Imported Instrument |
| Model | PM 8200Cl |
| Instrument Type | Online Analyzer |
| Measurement Principle | Amperometric Electrochemical Sensor (Constant Potential Method) |
| Measured Parameter | Free Chlorine (Cl₂) |
| Measurement Ranges | 0–2.000 ppm and 0–20.00 ppm |
| Accuracy | ±0.001 ppm / ±0.01 ppm |
| Repeatability | ±0.001 ppm / ±0.01 ppm |
| Resolution | 0.001 ppm / 0.01 ppm |
| Detection Limit | 0.001 ppm / 0.01 ppm |
| Temperature Compensation | –10 to 130 °C (NTC10K or PT1000, manual/automatic) |
| Operating Temperature | 0–70.0 °C |
| Storage Temperature | –20 to 70.0 °C |
| Enclosure Rating | IP65 |
| Power Supply | 90–260 VAC, 50/60 Hz or 24 VDC optional |
| Output | Dual isolated 4–20 mA (max. loop resistance 500 Ω, accuracy 0.1% FS) |
| Communication | RS485 with standard MODBUS RTU protocol |
| Relay Output | 1 multifunctional relay (cleaning control, periodic alarm, fault alarm) |
| Data Logging | 600,000 records with timestamped query capability |
| Display | Backlit graphical LCD with adjustable contrast |
| User Interface | Bilingual (English/Chinese), password-protected, keyless operation with auto-backlight timeout |
| Mounting Options | Wall-mounted, panel-mounted, or pipe-mounted |
| Dimensions | 144 × 144 × 106 mm |
| Panel Cutout | 138 × 138 mm |
| Weight | 0.86 kg |
| Sensor Model | Bsens650 |
| Sensor Range | 0–2.000 ppm / 0–20.00 ppm |
| Sensor Accuracy | ±2% FS |
| Sensor Electrode Material | Glass body with dual platinum ring working electrode |
| Sensor Operating Temperature | 0–70.0 °C |
| Max. Pressure Rating | 5 bar |
| Brand | Hach |
|---|---|
| Origin | USA |
| Model | 9184sc |
| Instrument Type | Online Analyzer |
| Measurement Principle | Amperometric Electrochemical Sensor (HOCl-selective Membrane) |
| Measurement Parameter | Free Chlorine (as HOCl) |
| Range | 0.005–20 ppm (mg/L) HOCl |
| Accuracy | ±2% of reading or ±10 ppb HOCl (whichever is greater) |
| Detection Limit | 5 ppb (0.005 mg/L) HOCl |
| Response Time (t₉₀) | <90 seconds |
| Sample Flow Rate | 200–250 mL/min (automatically regulated) |
| Operating Temperature | 0–45 °C |
| Sample Temperature Range | 2–45 °C |
| Sample pH Range | 4–8 |
| Calibration Interval | Every 2 months |
| Membrane & Electrolyte Replacement Interval | Every 6 months |
| Enclosure Rating | IP66 / NEMA 4X |
| Dimensions | 270 × 250 mm |
| Storage Temperature | −20–60 °C |
| Inlet/Outlet Fittings | 1/4″ O.D. inlet, 1/2″ I.D. outlet |
| Brand | JENSPRIMA |
|---|---|
| Origin | Shanghai, China |
| Model | innoCon 6500CL |
| Instrument Type | Online Analyzer |
| Measurement Principle | Amperometric Electrochemical Sensor |
| Measured Parameters | Free Chlorine, Chlorine Dioxide, Ozone (multi-parameter) |
| Range | 0.000–2.000 ppm and 0.00–20.00 ppm |
| Accuracy | ±2% F.S. |
| Resolution | 0.001 ppm / 0.01 ppm |
| Detection Limit | 0.001 ppm |
| Temperature Compensation | Automatic (Pt1000 sensor, ±10.0 °C offset adjustable) or Manual |
| Operating Temperature | –10.0 to +60.0 °C |
| Relative Humidity | 10–90% RH (non-condensing) |
| Display | Backlit LCD (44 × 65 mm, yellow backlight) |
| Power Supply | 90–260 VAC, 50/60 Hz |
| Output Signals | Two isolated 4–20 mA outputs (configurable, max. 600 Ω), RS485 Modbus RTU |
| Relay Outputs | Two SPDT relays (5 A / 250 VAC, 5 A / 30 VDC), independently configurable Hi/Lo alarm with hysteresis |
| Enclosure Rating | IP54 |
| Mounting | Panel-mount (DIN 43700, cutout 92 × 92 mm) |
| Dimensions | 96 × 96 × 130 mm |
| Weight | 0.45 kg |
| Housing Material | Flame-retardant plastic |
| Brand | Jiada Xiaotian'e |
|---|---|
| Origin | Jilin, China |
| Manufacturer Type | Direct Manufacturer |
| Instrument Type | Portable Analyzer |
| Model | GDYS-101SN2 |
| Measurement Principle | DPD Colorimetric Spectrophotometry |
| Measured Parameter | Free Residual Chlorine |
| Measurement Range | 0.00–5.00 mg/L |
| Accuracy | ±5% of reading |
| Detection Limit | 0.05 mg/L |
| Analysis Time | ≤3 minutes per sample |
| Reagent Format | Single-use, pre-calibrated DPD reagent vials |
| Compliance | Designed for field-deployable water quality screening in accordance with standard methods aligned with APHA 4500-Cl G, ISO 7393-2, and EPA Method 334.0 |
| Brand | Jiada Xiaotian'e |
|---|---|
| Origin | Jilin, China |
| Manufacturer Type | Direct Manufacturer |
| Instrument Type | Portable |
| Model | GDYS-101SN3 |
| Measurement Parameter | Free Residual Chlorine |
| Measurement Range | 0.00–2.50 mg/L |
| Accuracy | ±5% |
| Detection Limit | 0.01 mg/L |
| Light Source | High-Brightness LED |
| Wavelength | 520 nm |
| Power Supply | DC 9 V |
| Dimensions | 190 × 110 × 95 mm |
| Weight | 0.4 kg |
| Brand | Jiada Xiaotian’e |
|---|---|
| Origin | Jilin, China |
| Manufacturer Type | Direct Manufacturer |
| Country of Origin | China |
| Model | GDYS-301S |
| Instrument Type | Portable |
| Measurement Principle | DPD Spectrophotometry |
| Measured Parameters | Residual Chlorine, Chlorine Dioxide, Chlorite |
| Measurement Ranges | Chlorine Dioxide: 0.00–3.00 mg/L |
| Residual Chlorine | 0.00–2.50 mg/L |
| Chlorite | 0.00–2.00 mg/L |
| Accuracy | ±5% |
| LOD | Chlorine Dioxide: 0.02 mg/L |
| Residual Chlorine | 0.01 mg/L |
| Chlorite | 0.05 mg/L |
| Light Source | High-Brightness LED |
| Wavelength | 520 nm |
| Absorbance Range | 0.000–2.000 Abs |
| Stability | ≤0.005 Abs/h |
| Power Supply | 9 V Battery (Auto-Shutdown after 30 min |
| Operating Temperature | 0–50 °C |
| Brand | Jiada Xiaotianshe |
|---|---|
| Origin | Jilin, China |
| Manufacturer Type | Direct Manufacturer |
| Instrument Type | Portable |
| Model | GDYS-101SN4 |
| Measurement Principle | Colorimetric Method (DPD-based) |
| Measured Parameters | Residual Chlorine, Total Chlorine |
| Range | Residual Chlorine: 0.00–2.50 mg/L |
| Total Chlorine | 0.00–2.50 mg/L |
| Accuracy | ±5% of reading |
| Detection Limit | 0.01 mg/L for both residual and total chlorine |
| Light Source | High-brightness LED |
| Wavelength | 520 nm |
| Power Supply | DC 9 V |
| Dimensions | 190 × 110 × 95 mm |
| Weight | 0.4 kg |
| Brand | JiDa Xiaotian'e |
|---|---|
| Origin | Jilin, China |
| Manufacturer Type | Direct Manufacturer |
| Origin Category | Domestic (China) |
| Model | GDYS-101SE2 |
| Instrument Type | Portable |
| Measurement Principle | DPD-based Spectrophotometry |
| Measured Parameter | Chlorine Dioxide (ClO₂) |
| Measurement Range | 0.00–3.00 mg/L |
| Accuracy | ≤5% |
| Repeatability | ±0.01 mg/L |
| Resolution | 0.01 mg/L |
| Limit of Detection (LOD) | 0.02 mg/L |
| Light Source | 520 nm LED |
| Photometric Stability | ±0.005 Abs / 20 min |
| Measurement Time | 1 minute |
| Operating Temperature | 15–40 °C |
| Power Supply | DC 9 V (battery-powered) |
| Dimensions | 170 × 90 × 35 mm |
| Weight | 300 g |
| Brand | JiDa-Xiaotianshe |
|---|---|
| Origin | Jilin, China |
| Manufacturer Type | Original Equipment Manufacturer (OEM) |
| Country of Origin | China |
| Model | GDYS-101SN |
| Instrument Type | Portable |
| Measurement Principle | DPD Colorimetric Spectrophotometry |
| Measured Parameters | Residual Chlorine, Total Chlorine |
| Range | Residual Chlorine: 0.00–9.99 mg/L |
| Total Chlorine | 0.00–9.99 mg/L |
| Accuracy | ±5% of reading |
| Detection Limit | Residual Chlorine: 0.10 mg/L |
| Total Chlorine | 0.05 mg/L |
| Compliance Standard | GB/T 5750.11–2006 |
| Analysis Time | ≤3 minutes per sample |
| Reagent Format | Single-use, pre-packaged DPD reagent kits |
| Brand | Lanjing |
|---|---|
| Origin | Shandong, China |
| Manufacturer Type | Direct Manufacturer |
| Product Category | Domestic |
| Model | LJ-YL01 |
| Instrument Type | Portable |
| Measured Parameters | Free Chlorine, Total Chlorine, Chlorine Dioxide |
| Measurement Ranges | 0.04–3 mg/L and 0.2–15 mg/L |
| Repeatability | <0.5% |
| Measurement Principle | Photometric Colorimetry (LED-based) |
| Wavelength Selection | Automatic |
| Display | 3.5-inch TFT Color Touchscreen |
| Operating System | Android-based Embedded OS |
| Data Storage Capacity | >80,000 records |
| Connectivity | USB Type-C, Wi-Fi, Bluetooth, Mobile Hotspot |
| Power Supply | 5 V DC / Internal 5600 mAh Rechargeable Li-ion Battery |
| Continuous Operation Time | Up to 8 hours |
| Dimensions | 180 × 80 × 70 mm |
| Weight | 700 g |
| Environmental Operating Range | 0–50 °C, 0–90% RH (non-condensing) |
| Optical Source | Imported Cold LED Light Source (Lifetime ≥100,000 h) |
| Compliance Reference | HJ 586–2010 |
| 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 | Direct Manufacturer |
| Product Category | Domestic |
| Model | SJG-791 |
| Instrument Type | Online Analyzer |
| Measurement Principle | Electrochemical Amperometric Sensor |
| Measured Parameter | Free Residual Chlorine |
| Range | 0.00–20.00 mg/L |
| Accuracy | ±10% (≥0.5 mg/L) or ±0.05 mg/L (<0.5 mg/L) |
| Resolution | 0.01 mg/L (Cl₂), 0.01 pH, 0.1 °C |
| pH Range | 0.00–14.00 pH |
| Temperature Range | 0.0–60.0 °C |
| pH Accuracy | ±0.05 pH |
| Temp Accuracy | ±0.5 °C |
| Electronic Unit Stability | ±1% FS/24 h |
| 90% Response Time | 2 min |
| Enclosure Rating | IP65 |
| Power Supply | AC 220 V ±10%, 50 Hz |
| Dimensions | 166 × 166 × 110 mm |
| Weight | 2 kg |
| Output | Dual isolated 4–20 mA DC outputs (configurable for Cl₂ or pH) |
| Data Storage | 2000 measurement records |
| Auto Compensation | pH and temperature compensation for residual chlorine |
| Alarm Function | Configurable high/low limits with hysteresis |
| Power Failure Protection | Yes |
| Brand | Leici |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Manufacturer |
| Product Category | Domestic |
| Model | SJG-791B |
| Instrument Type | Online Analyzer |
| Measurement Principle | Electrochemical Amperometric Sensor Method |
| Measured Parameters | Residual Chlorine / Total Chlorine / Chlorine Dioxide / Ozone (selectable single parameter) |
| Measurement Range | 0.005–2.000 mg/L (standard range) |
| Accuracy | ±1% FS (for residual chlorine with DCS4H-M0c electrode) |
| Resolution | 0.001 mg/L |
| Output Signal | Isolated 4–20 mA DC (max. load 600 Ω) |
| Digital Interface | RS-485 |
| Temperature Compensation | Automatic (5–40 °C sample range) |
| Enclosure Rating | IP65 |
| Power Supply | AC 220 V ±10%, 50 Hz |
| Installation | Wall-mounted console with flow-through sensor housing |
| Sensor Cable Length | 5 m (standard) |
| Sample Flow Rate | 0.3–0.5 L/min |
| Brand | Leici |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | OEM Manufacturer |
| Regional Classification | Domestic (China) |
| Model | SJG-792 |
| Instrument Type | Online Analyzer |
| Measurement Principle | Electrochemical Amperometric Sensor |
| Measured Parameters | Residual Chlorine, Total Chlorine |
| Range | 0.00–5.00 mg/L |
| Accuracy | ±5% (for values >1 mg/L) or ±0.05 mg/L (for values ≤1 mg/L) |
| Repeatability | ±0.025 mg/L (≤1 mg/L) |
| Resolution | 0.01 mg/L |
| Detection Limit | ≤0.05 mg/L |
| Display | Dot-matrix LCD |
| Data Storage | Up to 700 records with SD card export |
| Output | Isolated 4–20 mA DC (configurable span), RS-232/RS-485 (Modbus RTU) |
| Enclosure Rating | IP65 |
| Power Supply | AC 220 V ±10%, 50 Hz ±1% |
| Brand | Lianhua |
|---|---|
| Origin | Beijing, China |
| Manufacturer Type | Direct Manufacturer |
| Instrument Type | Portable |
| Measurement Principle | DPD Spectrophotometry |
| Measurable Parameters | Free Chlorine, Total Residual Chlorine, Chlorine Dioxide |
| Range | Free Chlorine: 0–15 mg/L |
| Total Residual Chlorine | 0–15 mg/L |
| Chlorine Dioxide | 0–5 mg/L |
| Accuracy | ±10% |
| Repeatability | ≤±5% |
| Display | 3.5-inch color TFT screen with dial-style UI |
| Calibration | Built-in optical calibration & 15 preloaded calibration curves |
| Compliance | HJ 586–2010, GB/T 5750.11–2006 |
| 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 | YST (Dalian Yistek) |
|---|---|
| Origin | Liaoning, China |
| Model | YST909B-CH980 |
| Measurement Range | 0.01–200 mg/L as Cl₂ |
| Resolution | 0.001–0.1 mg/L |
| Accuracy | ±0.15% of full scale |
| Response Time (T90) | ≤120 s |
| Operating Temperature | 0–60 °C |
| Humidity Limit | <95% RH (non-condensing) |
| Sample Temp. | 0–45 °C |
| Sample Flow Rate | ≈500 mL/min |
| Sample Pressure | 0.1–0.3 bar |
| Power Supply | AC 100–240 V / DC 18–36 V |
| Power Consumption | 12–120 W |
| Enclosure Rating | IP65 |