Water Quality Analysis
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| Brand | YST (Dalian Yist Instrument Co., Ltd.) |
|---|---|
| Origin | Liaoning, China |
| Model | YST809B-DO660 |
| Measurement Range | 0–20 mg/L DO / 0–200% saturation |
| Accuracy | ±0.1 mg/L (0–10 mg/L), ±0.2 mg/L (10–20 mg/L) |
| Temperature Compensation | 0–60 °C (automatic) |
| Response Time (t₉₀) | ≤60 s |
| Output Signals | 4–20 mA analog + RS485 digital (Modbus RTU) |
| Power Supply | AC 220 V ±10% or DC 24 V |
| Operating Environment | 0–50 °C, ≤90% RH (non-condensing) |
| Installation Options | Submersible, Flow-through, Pipe-mount |
| IP Rating | IP68 (sensor), IP65 (transmitter) |
| Brand | YST (Dalian Yist Instrument Co., Ltd.) |
|---|---|
| Origin | Liaoning, China |
| Model | YST809B-DO660 |
| Measurement Principle | Fluorescence Quenching (Pt-porphyrin sensor) |
| Excitation Wavelength | 470 nm |
| Emission Detection | Phase-shift analysis of red fluorescence |
| Range | 0–20 mg/L (0–20,000 ppb) |
| Accuracy | ±0.2 mg/L (0–20 mg/L), ±1 ppb + 2% (ppb range) |
| Resolution | 0.01 mg/L or 1 ppb |
| Response Time (t₉₀) | ≤30 s |
| Operating Temperature | −5 to 50 °C |
| IP Rating | IP68 |
| Submersible Depth | Up to 30 m |
| Compensation | Automatic temperature, atmospheric pressure, and salinity compensation |
| Output | RS485 (Modbus RTU), 4–20 mA analog |
| Sensor Lifetime | 1–3 years (fluorescent cap) |
| Drift | <1% per year |
| Calibration | Air-saturated water auto-calibration |
| Installation Options | Immersion, flow-through, buoy-mounted |
| Brand | YST |
|---|---|
| Origin | Liaoning, China |
| Model | YST809B-DO660 |
| Measurement Range | 0.00–20.00 mg/L DO |
| Accuracy | ±0.5% FS |
| Fluorescent Cap Lifetime | ≥12 months (typical operation) |
| Temperature Compensation | Automatic, 0–50 °C |
| Enclosure Rating | IP68 |
| Communication Interface | RS485 |
| Power Supply | AC 220 V or DC 12 V (solar-compatible) |
| User Interface | Chinese LCD, one-button calibration |
| 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 |
| Brand | YST (Dalian Yist Environmental Technology Co., Ltd.) |
|---|---|
| Origin | Liaoning, China |
| Model | YST909B-CH980 |
| Measurement Range | Free Chlorine 0–5 mg/L (extendable to 0–20 mg/L), Total Chlorine 0–10 mg/L (extendable to 0–50 mg/L) |
| Resolution | 0.01 mg/L |
| Accuracy | ±2% FS or ±0.02 mg/L (whichever is greater) |
| Response Time (T90) | ≤60 s |
| Operating Temperature | 0–50 °C |
| Relative Humidity | 10–90% RH (non-condensing) |
| Power Supply | AC 220 V ±10%, 50 Hz or DC 12–24 V |
| Output Signals | 4–20 mA analog, RS485 digital (Modbus RTU protocol) |
| Ingress Protection | IP65 |
| Calibration | Automatic (programmable interval) or manual |
| Brand | YST (Dalian Yist Instrument Co., Ltd.) |
|---|---|
| Origin | Liaoning, China |
| Model | YST909B-CH980 |
| Measurement Principle | Electrochemical and DPD-based Spectrophotometric Methods |
| Range (Electrochemical) | 0.01–200 mg/L as Cl₂ |
| Range (Spectrophotometric) | 0.0–10.0 mg/L as Cl₂ |
| Resolution (Electrochemical) | 0.001–0.1 mg/L |
| Resolution (Spectrophotometric) | 0.01 mg/L |
| Accuracy | ±0.15% of full scale or ±0.05 mg/L (whichever is greater) |
| Response Time (T90) | ≤120 s (electrochemical), ≤2.5 min (free chlorine), ≤3.5 min (total chlorine) |
| Operating Environment | 0–60 °C, <95% RH (non-condensing), vibration-free, well-ventilated indoor space |
| Power Supply | AC 100–240 V / DC 18–36 V |
| Power Consumption | ≤120 W |
| Enclosure Rating | IP65/IP66 |
| Output Interfaces | RS-232, RS-485, 4–20 mA analog output |
| Data Storage Capacity | 14,000 records |
| Auto-calibration & Self-diagnostic Functions | Yes |
| Sampling Interval | Programmable from 1 to 999 minutes |
| Brand | YST (Dalian Yist Instrument Co., Ltd.) |
|---|---|
| Origin | Liaoning, China |
| Model | YST909B-CH980 |
| Measurement Range | 0–10 mg/L free chlorine |
| Accuracy | ±2% FS (0–5 mg/L) |
| Response Time | ≤60 s (T90) |
| Zero Drift | ≤±0.05 mg/L over 30 days |
| Span Drift | ≤±2% FS over 30 days |
| Operating Temperature | 0–50 °C |
| Relative Humidity | ≤85% RH (non-condensing) |
| Power Supply | AC 220 V ±10%, 50 Hz |
| Output Signals | 4–20 mA analog output |
| Data Storage | 6-month timestamped history (local), USB export supported |
| Brand | YST (Dalian Yist) |
|---|---|
| Origin | Liaoning, China |
| Model | YST909B-CH980 |
| Measurement Principle | Modified DPD Colorimetry + Membrane-Amperometric Sensor |
| Range | 0.01–10 mg/L Free Chlorine |
| Accuracy | ≤±0.01 mg/L (0.01–1 mg/L range) |
| Drift | ≤±0.03 mg/L over 72 h |
| Power Supply | AC 220 V ±10%, 50 Hz (solar-compatible option available) |
| Output | 4–20 mA analog + RS485 Modbus RTU |
| Environmental Rating | IP65 |
| Operating Temperature | 0–50 °C |
| Relative Humidity | 10–90% RH (non-condensing) |
| Data Storage | Internal logging with trend report export capability |
| Compliance | GB/T 5750.11–2006 |
| Brand | YST (Dalian Yist Environmental Technology Co., Ltd.) |
|---|---|
| Origin | Liaoning, China |
| Model | YST909B-CH980 |
| Measurement Range | Free Chlorine 0–5 mg/L (extendable to 0–20 mg/L), Total Chlorine 0–10 mg/L (extendable to 0–50 mg/L) |
| Resolution | 0.01 mg/L |
| Accuracy | ±2% FS or ±0.02 mg/L (whichever is greater) |
| Response Time | ≤60 s (T90) |
| Operating Temperature | 0–50 °C |
| Humidity | 10–90% RH (non-condensing) |
| Power Supply | AC 220 V ±10%, 50 Hz or DC 12–24 V |
| Output Signals | 4–20 mA analog, RS485 digital (Modbus RTU protocol) |
| Ingress Protection | IP65 |
| Calibration | Automatic (programmable interval) or manual |
| Brand | YST (Dalian Yist Instrument Co., Ltd.) |
|---|---|
| Origin | Liaoning, China |
| Model | YST909B-CH980 |
| Measurement Range | 0–1 mg/L / 0–5 mg/L / 0–10 mg/L (selectable) |
| Resolution | 0.001 mg/L (low range), 0.01 mg/L (mid/high range) |
| Repeatability | ≤1% FS |
| Response Time (T90) | ≤60 s |
| Operating Temperature | Indoor: 0–50°C |
| Outdoor Explosion-Proof | −10–60°C |
| Humidity | ≤90% RH (non-condensing) |
| Sample Temperature | 0–50°C |
| Sample Pressure | 0.1–0.6 MPa |
| Output Signals | 4–20 mA analog, RS485/RS232 (Modbus RTU) |
| Alarm Outputs | 2 relay outputs (NO/NC, 220 VAC / 5 A) |
| Power Supply | AC 220 V ±10%, 50 Hz or DC 24 V |
| Sampling Modes | Flow-through (50–300 mL/min) or Immersion |
| Accuracy | ±2% FS (full scale) |
| Zero Drift (30 days) | ≤±0.05 mg/L |
| Span Drift (30 days) | ≤±2% FS |
| Auto Temperature & pH Compensation | Yes |
| Data Storage Capacity | >80,000 records |
| Update Rate | Up to 1 Hz |
| Brand | Dalian YST |
|---|---|
| Origin | Liaoning, China |
| Model | YST909B-CH980 |
| Measurement Range | 0–1 mg/L / 0–5 mg/L / 0–10 mg/L (selectable) |
| Resolution | 0.001 mg/L (low range), 0.01 mg/L (mid/high range) |
| Repeatability | ≤1% |
| Response Time (T90) | ≤60 s |
| Operating Temperature | 0–50°C (indoor), –10–60°C (outdoor explosion-proof version) |
| Humidity | ≤90% RH (non-condensing) |
| Sample Temperature | 0–50°C |
| Sample Pressure | 0.1–0.6 MPa |
| Output Signals | 4–20 mA, RS485/RS232 (Modbus RTU) |
| Relay Outputs | 2 configurable (NO/NC, 220 VAC / 5 A) |
| Power Supply | AC 220 V ±10%, 50 Hz or DC 24 V |
| Sampling Modes | Flow-through (50–300 mL/min) and Immersion |
| Zero Drift | ±0.05 mg/L over 30 days |
| Span Drift | ±2% FS over 30 days |
| Compensation | Automatic temperature and pH compensation |
| Turbidity Tolerance | ≤100 NTU |
| pH Range for Stable Operation | 6–9 |
| Brand | YST (Dalian Yisite) |
|---|---|
| Origin | Liaoning, China |
| Model | YST909B-CH980 |
| Measurement Range | 0–1 mg/L / 0–5 mg/L / 0–10 mg/L (selectable) |
| Resolution | 0.001 mg/L (low range), 0.01 mg/L (mid/high range) |
| Repeatability | ≤1% |
| Response Time (T90) | ≤60 s |
| Operating Temperature | 0–50°C (indoor), –10–60°C (outdoor explosion-proof version) |
| Humidity | ≤90% RH (non-condensing) |
| Sample Temp. | 0–50°C |
| Sample Pressure | 0.1–0.6 MPa |
| Output | 4–20 mA analog, RS485/RS232 (Modbus RTU) |
| Relay Outputs | 2 configurable (NO/NC, 220 VAC/5 A) |
| Power Supply | AC 220 V ±10%, 50 Hz or DC 24 V |
| Sampling Modes | Flow-through (50–300 mL/min) and Immersion |
| Auto-Cleaning | Yes |
| Compliance | Designed for ISO 9001-manufactured systems |
| Brand | Yuntang |
|---|---|
| Origin | Shandong, China |
| Manufacturer Type | OEM/ODM Manufacturer |
| Country of Origin | China |
| Model | YT-BCMn |
| Measurement Principle | Potassium Permanganate Oxidation with ORP Endpoint Detection |
| Instrument Type | Field-Deployable Laboratory Analyzer |
| Range | 0.25–25 mg/L (multi-range auto-switching) |
| Repeatability | <0.5% RSD |
| Accuracy | ±5% of reading |
| LOD | 0.4 mg/L |
| Resolution | 0.001 mg/L |
| Compliance | GB/T 11892–1989 |
| Display | 8″ HD TFT touchscreen (1024×768) |
| OS | Android 7.1.1 |
| Power | 48 V / 8 Ah Li-ion battery (≥6 h continuous dual-mode operation) |
| Dimensions | 430 × 350 × 200 mm |
| Weight | 11 kg |
| Brand | Yuntang |
|---|---|
| Origin | Shandong, China |
| Manufacturer Type | Direct Manufacturer |
| Product Category | Domestic |
| Model | YT-BOD |
| Instrument Type | Portable BOD Analyzer |
| Measurement Principle | Mercury-Free Pressure Differential Method |
| Measurement Range | 0–4000 mg/L |
| Detection Limit | 5 mg/L |
| Accuracy | ≤5% or ±1 mg/L (at 3.55 hPa) |
| Single-Sample Measurement Time | 8 min |
| Repeatability | 3% |
| Resolution | 0.01 mg/L |
| Data Logging Interval | 5 min – 24 h (user-configurable) |
| Incubation Temperature | 20 ± 1 °C |
| Incubation Duration | 1–30 days (programmable) |
| Sample Vessel Volume | 580 mL |
| Number of Parallel Channels | 6 independent terminals |
| Power Supply | AC 220 V ±10%, 50–60 Hz |
| Dimensions (w×d×h, incl. bottles) | 324 × 335 × 350 mm |
| Data Storage Capacity | ≥10 years of measurement records |
| Connectivity | Bluetooth (terminal-to-host), Wi-Fi (cloud upload), USB export |
| Built-in Thermal Printer | Yes |
| Operating System | Android-based UI |
| Display | 7-inch capacitive touchscreen |
| Battery Life (per terminal) | >2 years |
| Compliance Standards | HJ 505–2009, JJG 824–1993 |
| Brand | Yuntang |
|---|---|
| Origin | Shandong, China |
| Manufacturer Type | Manufacturer |
| Country of Origin | China |
| Model | YT-TP |
| Detection Parameter | Total Phosphorus |
| Instrument Type | Portable |
| Measurement Principle | Spectrophotometry (Ammonium Molybdate Method per GB 11893-89) |
| Detection Range | 0–30 mg/L (segmented) |
| LOD | 0.02 mg/L |
| Accuracy | ±5% FS |
| Stability | <0.5% / 20 min |
| Repeatability | <0.5% RSD |
| Optical Drift | ≤0.002 A within 20 min |
| Light Source | High-brightness imported LED with auto-calibration |
| Display | 10.1″ color TFT touchscreen |
| OS | Android 7.1.1 |
| Data Storage | 8 million records with time-based indexing |
| Connectivity | Wi-Fi, RJ45, Bluetooth, mobile hotspot, USB 2.0 |
| Power Supply | AC 220 V ±10%, 50 Hz |
| Dimensions | 444 × 303 × 173 mm |
| Weight | 5.2 kg (net, excluding battery/adapter) |
| Operating Environment | 5–40 °C, RH <85% (non-condensing) |
| Printer | Built-in thermal line printer with QR code support |
| Compliance | GB 11893-89 |
| Brand | Zealquest |
|---|---|
| Origin | Netherlands |
| Manufacturer Type | Authorized Distributor |
| Origin Category | Imported |
| Model | WISP Orca |
| Measurement Principle | Simultaneous acquisition of upwelling radiance (Lu), downwelling radiance (Ld), and downwelling irradiance (Ed) via dual-radiance and single-irradiance optical sensors for in-situ water optical property derivation |
| Spectral Range | 220–1100 nm (calibration-dependent) |
| Measurable Parameters | Chlorophyll-a, Phycocyanin (cyanobacterial pigment), Colored Dissolved Organic Matter (CDOM), Secchi depth / transparency, Total Suspended Solids (TSS) |
| Spectral Resolution | 0.43 nm |
| Optical Bandwidth (FWHM) | 4.65 nm |
| Signal-to-Noise Ratio | ≥330:1 |
| Integration Time | 30 µs – 40 s |
| Operating Temperature | 0–55 °C |
| Dimensions | 262 × 201 mm |
| Weight | 1.3 kg |
| Brand | Zealquest |
|---|---|
| Origin | Netherlands |
| Manufacturer Type | Authorized Distributor |
| Product Origin | Imported |
| Model | WISP Station |
| Measurement Principle | Hyperspectral reflectance measurement in visible and near-infrared (350–900 nm) with 4.6 nm spectral resolution |
| Spectral Range | 220–1000 nm |
| Measurable Parameters | Surface reflectance, water color, chlorophyll-a (phytoplankton), phycocyanin (cyanobacteria), algal bloom presence, Secchi depth/turbidity, total suspended matter (TSM), and diffuse attenuation coefficient (Kd) |
| Spectral Resolution | 4.65 nm FWHM |
| Grating | 300 lines/mm, blaze wavelength 300 nm |
| Slit Width | 100 µm |
| Stray Light | < 0.2% |
| Environmental Rating | IP67 enclosure with integrated temperature & humidity logging |
| Data Transmission | Cellular (LTE-M/NB-IoT) to WISPcloud platform |
| Power Supply | Solar panel + rechargeable LiFePO₄ battery |
| Default Sampling Interval | 15 min (configurable down to 2 min) |
| Compliance | Designed for ISO 17025-aligned field calibration workflows |
| Brand | Easysensor |
|---|---|
| Model | ZG-ST5200 |
| Origin | Jiangsu, China |
| Instrument Type | Online Water Quality Analyzer |
| Compliance | Designed for ASTM D3867, ISO 15681-2, and USP <643> compliant nutrient measurement workflows |
| Detection Principles | Spectrophotometry (NH₃-N: Fluorometric), Flow Injection Analysis (FIA) with segmented microfluidics |
| Power Supply | 12–24 V DC |
| Operating Temperature | 0–40 °C |
| Depth Rating | Up to 10 m (IP68 housing) |
| Data Output | RS485/Modbus RTU, SD card local storage (up to 1 year @ 15-min intervals), optional 4G/LTE telemetry |
| Calibration | Auto-zero and multi-point standard calibration with onboard reagent reservoirs (≥30 days operation per cartridge) |
| Brand | Zhiyunda |
|---|---|
| Origin | Beijing, China |
| Manufacturer Type | Authorized Distributor |
| Country of Origin | China |
| Model | ZYD-HF |
| Instrument Type | Portable |
| Detection Principle | Photometric Method (Colorimetric Absorption) |
| Detectable Metals/Analytes | Dual- and Multi-parameter (Fe, As, Mn, Cd, Cr(VI), Pb, etc.) |
| Detection Time | ≤15 min per parameter |
| Accuracy | Relative Error ≤ ±10% |
| Precision | Relative Standard Deviation (RSD) ≤ 5% |
| Resolution | 0.01 mg/L |
| Power Supply | AAA Batteries |
| Interface | USB |
| Brand | Zhuochi |
|---|---|
| Origin | Zhejiang, China |
| Manufacturer Type | Authorized Distributor |
| Country of Origin | China |
| Model | AOX-3-ZC |
| Price | USD 4,200 (approx.) |
| Measurement Principle | Combustion-Coulometric Titration |
| Measurement Range | 5–1000 µg AOX per sample |
| Accuracy | ±1% (relative to certified reference material) |
| Repeatability (RSD) | ≤1% |
| Detection Limit | 0.8–1000 µg/L (sample-dependent, based on 100 mL preconcentration volume) |
| Resolution | 0.01 µg (coulometric current integration) |
| Brand | Zming Environmental Technology Co., Ltd. |
|---|---|
| Origin | Jiangsu, China |
| Manufacturer Type | Authorized Distributor |
| Country of Origin | China |
| Model | ZM-GC-FID NMHC CEMS |
| Pricing | Available Upon Request |
| Brand | ZWINSoft |
|---|---|
| Origin | Tianjin, China |
| Manufacturer Type | OEM/ODM Manufacturer |
| Country of Origin | China |
| Model | ZWIN-CHL1006 |
| Application | Online Chlorophyll-a Monitoring |
| Measurement Principle | Chlorophyll Fluorescence Detection |
| Chlorophyll-a Range | 0–500 µg/L |
| Limit of Detection (LOD) | 0.01 µg/L |
| Accuracy | <5% FS |
| Resolution | 0.01 µg/L |
| Response Time | <15 s |
| Operating Temperature | 0–50 °C |
| Dimensions (Ø × L) | 34 × 225 mm |
| Housing Materials | POM + Titanium Alloy + 316L Stainless Steel |
| Ingress Protection | IP68 (1 bar) |
| Power Supply | 12–24 VDC |
| Output Interface | RS485 with Modbus RTU Protocol |
| Self-Cleaning Function | Yes |
| Light Source | High-Brightness LED |