Dissolved Oxygen Meter
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Showing 211–240 of 260 results
| Brand | WTW |
|---|---|
| Origin | Germany |
| Model | Oxi 3310 |
| Instrument Type | Portable |
| Measurement Principle | Electrochemical Clark-type Polarographic Sensor |
| DO Range | 0.00–19.99 mg/L (extended range up to 90 mg/L) |
| Accuracy | ±0.5% of reading |
| Saturation Range | 0.0–199.9% (extended to 600%) |
| Partial Pressure Range | 0–199.9 hPa / 0–1250 hPa |
| Temperature Range | −5.0 to +105.0 °C (±0.1 °C) |
| Data Storage | 200 manual + 5,000 automatic records |
| IP Rating | IP66/IP67 |
| Power Supply | 4 × 1.5 V alkaline or 4 × 1.2 V rechargeable batteries |
| Battery Life | up to 1000 h (150 h with backlight enabled) |
| Interface | Waterproof USB 2.0 |
| Calibration | Automatic timer-based OxiCal protocol with CellOx/DurOx probes |
| Temperature Compensation | ATC (Automatic Temperature Compensation) |
| Brand | WTW |
|---|---|
| Origin | Germany |
| Model | StirrOx-G |
| Measurement Principle | Electrochemical (Clark-type polarographic sensor) |
| Measurement Range | 0–50 mg/L O₂ |
| Temperature Range | 0–50 °C |
| Electrode Material | Gold cathode |
| Body Material | Polyoxymethylene (POM) |
| Integrated Temperature Sensor | NTC thermistor |
| Stirring Mechanism | Built-in magnetic stirrer |
| Zero-point Calibration | Not required |
| Membrane Leak Detection | Integrated monitoring system |
| Application Type | Laboratory-grade DO measurement |
| Brand | WTW |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Authorized Distributor |
| Product Origin | Domestic (China-assembled under WTW/Xylem specifications) |
| Model | StirrOx® G |
| Instrument Type | Portable DO Sensor |
| Measurement Principle | Polarographic (Clark-type) Electrochemical Probe |
| Range | 0.00–90 mg/L O₂ |
| Accuracy | ±0.5% of reading |
| Repeatability | ≤±0.5% |
| Detection Limit | 0.01 mg/L |
| Response Time (t₉₀) | <60 s (in stirred water at 20 °C) |
| Operating Temperature | 0–40 °C |
| Membrane Material | PTFE |
| Electrolyte | KCl-based aqueous solution |
| Connector | WTW-standard 6-pin DIN |
| Brand | Xylem |
|---|---|
| Origin | USA |
| Model | YSI Pro20 |
| Instrument Type | Portable |
| Measurement Principle | Polarographic & Galvanic (User-Selectable Sensor Types) |
| DO Range | 0–50 mg/L |
| Accuracy | ±2% of reading (0–20 mg/L) or ±0.2 mg/L, whichever is greater |
| Repeatability | ±2% |
| Detection Limit | 0.1 mg/L |
| Temperature Range | –5 to 55 °C |
| Temp Accuracy | ±0.3 °C |
| Barometric Pressure Range | 53–133 kPa |
| Pressure Accuracy | ±0.4 kPa (within ±15 °C of calibration temperature) |
| Salinity Compensation | 0–70 ppt (manual input, automatic compensation) |
| Data Storage | 50 datasets with timestamp |
| IP Rating | IP67 |
| Drop Test | 1-meter drop resistance |
| Certifications | RoHS, CE, WEEE |
| Warranty | 3 years (instrument), 2 years (cable), 1 year (polarographic sensor), 6 months (galvanic sensor) |
| Brand | Yoke |
|---|---|
| Origin | Shanghai, China |
| Model | i-231 |
| Instrument Type | Portable |
| Measurement Principles | Potentiometric (pH/mV), Conductometric (Conductivity/TDS/Salinity/Resistivity), Electrochemical (Galvanic or Polarographic Dissolved Oxygen) |
| pH Range | 0.00–14.00 |
| pH Accuracy | ±0.01 |
| pH Repeatability | ≤±0.01 |
| Conductivity Range | 0.000 μS/cm – 2000 mS/cm |
| Conductivity Accuracy | ±0.5% FS |
| Conductivity Repeatability | ≤±0.2% |
| Conductivity Detection Limit | 0.01 μS/cm |
| Dissolved Oxygen Range | 0.00–99.00 mg/L |
| DO Accuracy | ±0.2 mg/L |
| DO Repeatability | ≤±0.1 mg/L |
| DO Detection Limit | 0.01 mg/L |
| Temperature Compensation | Automatic & Manual |
| IP Rating | IP54 |
| Display | 7-inch full-color capacitive touchscreen |
| Data Management | Onboard storage, statistical analysis, audit-trail-capable export, GMP-compliant operation |
| Brand | Yoke |
|---|---|
| Origin | Shanghai, China |
| Model | i-403 |
| Measurement Parameters | pH (0.00–14.00), Conductivity (0.000 µS/cm–200 mS/cm), Dissolved Oxygen (0.00–99.00 mg/L), Temperature (−5.0–55.0 °C) |
| Accuracy | pH ±0.01, Conductivity ±0.5% FS, DO ±0.2 mg/L |
| Repeatability | pH ≤±0.01, Conductivity ≤±0.2% FS, DO ≤±0.1 mg/L |
| Detection Limits | Conductivity 0.01 µS/cm, DO 0.01 mg/L |
| Display | 7-inch color capacitive touchscreen |
| Compliance | IP54 rated enclosure, GMP-compliant data handling with audit trail support |
| Brand | Yoke |
|---|---|
| Origin | Shanghai, China |
| Model | i-501 |
| Instrument Type | Portable |
| Measurement Principle | Fluorescence Quenching (Optical) |
| DO Range | 0–50.00 mg/L |
| Accuracy | ±0.1 mg/L |
| Repeatability | ≤±0.05 mg/L |
| Detection Limit | 0.01 mg/L |
| Display | 7-inch color capacitive touchscreen |
| DO Resolution | 0.01 mg/L (at <10 mg/L), 0.1 mg/L (at ≥10 mg/L) |
| Temperature Compensation | Automatic & Manual |
| IP Rating | IP54 |
| Data Management | Onboard statistics, audit trail, firmware update, power-fail recovery, factory reset |
| Compliance | Designed for GLP/GMP-aligned workflows |
| Brand | Yoke |
|---|---|
| Origin | Shanghai, China |
| Model | i-503 |
| Measurement Principles | Potentiometric (pH/mV), Conductometric (EC/TDS/Salinity/Resistivity), Fluorescence-based Optical Dissolved Oxygen (DO) |
| pH Range | 0.00–14.00 |
| EC Range | 0.00–200.0 mS/cm |
| DO Range | 0.00–99.00 mg/L |
| Temperature Range | −5.0–55.0 °C |
| pH Accuracy | ±0.01 pH |
| EC Accuracy | ±0.5% FS |
| DO Accuracy | ±0.2 mg/L |
| pH Repeatability | ≤±0.01 pH |
| EC Repeatability | ≤±0.2% |
| DO Repeatability | ≤±0.1 mg/L |
| EC Detection Limit | 0.01 μS/cm |
| DO Detection Limit | 0.01 mg/L |
| Display | 7-inch color capacitive touchscreen |
| Protection Rating | IP54 |
| Power | Rechargeable Li-ion battery with USB-C and external power input |
| Connectivity | Integrated Bluetooth 5.0, USB data export, PC/mobile app support |
| Compliance | Designed for GLP/GMP-aligned workflows with audit-trail-capable data logging, firmware upgradability, and factory reset capability |
| Brand | Yoke |
|---|---|
| Origin | Shanghai, China |
| Model | i-701 |
| Instrument Type | Portable |
| Measurement Principle | Potentiometric (Ion-Selective Electrode, ISE) |
| pH Range | –2.00 to 20.00 pH/pX |
| mV Range | –1999.9 to +1999.9 mV |
| pH Resolution | 0.01 pH (selectable down to 0.001 pH) |
| mV Resolution | 0.1 mV (selectable down to 0.01 mV) |
| Accuracy | pH ±0.01 pH |
| Repeatability | ≤±0.5% |
| Detection Limit | 0.01 mg/L |
| Temperature Compensation | Automatic & Manual |
| IP Rating | IP54 |
| Compliance | GMP-aligned data integrity features |
| Brand | Yoke |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Instrument Type | Laboratory Benchtop Meter |
| Measurement Principle | Polarographic Electrochemical Probe |
| Range | (0–20.00) mg/L (ppm), (0–200.0)% |
| Accuracy | Meter: ±0.10 mg/L |
| System (with electrode) | ±0.40 mg/L |
| Resolution | 0.01 mg/L / 0.1% |
| Temperature Compensation | 0–45 °C (automatic) |
| Salinity Compensation | 0–45 ppt (automatic) |
| Barometric Pressure Compensation | 80–105 kPa (automatic) |
| Response Time | ≤30 s (90% response at 25 °C) |
| Residual Current | ≤0.1 mg/L |
| Calibration Modes | Air-saturated water, Water-saturated air |
| Data Storage | 600 sets (ID, DO value, temperature, date, time) |
| Interface | RS232 |
| Operating Environment | 10–30 °C, ≤80% RH |
| IP Rating | IP54 |
| Power Supply | DC 9 V / 300 mA |
| Brand | Yoke |
|---|---|
| Origin | Shanghai, China |
| Model | L-201 |
| Instrument Type | Portable |
| Measurement Principle | Potentiometric (Glass Electrode) |
| pH Range | −2.00 to 20.00 pH |
| pH Resolution | 0.1 / 0.01 pH |
| pH Accuracy | ±0.01 pH |
| mV Range | ±1999.9 mV |
| mV Resolution | 0.1 mV |
| mV Accuracy | ±1 mV |
| pH Repeatability | ≤±0.01 pH |
| mV Repeatability | ≤±1 mV |
| Temperature Compensation | Automatic & Manual |
| Calibration Options | 1–3 point, with auto-buffer recognition |
| Built-in Buffers | 15 standard buffers across 3 groups |
| Display | 7-inch color TFT capacitive touchscreen |
| Language Support | English & Chinese |
| User Interface | Graphical, glove-compatible, UV-resistant, scratch-resistant, auto-dimming |
| Brand | Yoke |
|---|---|
| Origin | Shanghai, China |
| Model | L-231 |
| Instrument Type | Portable |
| Measurement Principle | Fluorescence-based Dissolved Oxygen (DO), Potentiometric pH, Conductivity (4-electrode or 2-electrode, selectable) |
| DO Range | 0–99.00 mg/L |
| DO Accuracy | ±0.2 mg/L |
| DO Detection Limit | 0.01 mg/L |
| pH Accuracy | ±0.01 pH |
| pH Range | −2.00 to 20.00 pH |
| pH Resolution | 0.001 / 0.01 / 0.1 pH (user-selectable) |
| mV Resolution | 0.01 / 0.1 / 1 mV (user-selectable) |
| Conductivity Accuracy | ±0.5% FS |
| Conductivity Detection Limit | 0.01 µS/cm |
| Conductivity Calibration | Built-in 8 standard solutions (ISO/ASTM-compliant), 1-point user calibration supported |
| Repeatability | DO ≤ ±0.1 mg/L |
| Temperature Compensation | Automatic (NTC 30kΩ) and manual modes |
| Data Management | Onboard statistical analysis (min/max/avg/stdev), audit-trail-capable storage, GLP/GMP-compliant data logging with timestamp, user ID, and electrode status metadata |
| Enclosure Rating | IP54 |
| Display | 7-inch capacitive color touchscreen with glove-compatible operation, UV-resistant, scratch-resistant surface, adjustable brightness and auto-dimming |
| Power | Rechargeable Li-ion battery (≥16 h continuous use), AC adapter included |
| Compliance | Meets ISO 5814 (DO by optical method), ASTM D888, USP <643>, and relevant Chinese national standards (e.g., HJ 506-2009 for DO |
| Brand | Yoke |
|---|---|
| Origin | Shanghai, China |
| Model | L-241 |
| Instrument Type | Portable |
| Measurement Principles | Potentiometric (pH/mV), Electrochemical Polarographic (Dissolved Oxygen), Conductometric (Conductivity) |
| pH Range | −2.00 to 20.00 pH |
| pH Accuracy | ±0.01 pH |
| pH Repeatability | ≤±0.01 pH |
| Dissolved Oxygen Range | 0.00–99.00 mg/L |
| Dissolved Oxygen Accuracy | ±0.2 mg/L |
| Dissolved Oxygen Detection Limit | 0.01 mg/L |
| Conductivity Range | 0.00 µS/cm–200.0 mS/cm |
| Conductivity Accuracy | ±0.5% FS |
| Conductivity Detection Limit | 0.01 µS/cm |
| Temperature Range | −5.0 to 55.0 °C |
| Temperature Accuracy | ±0.2 °C |
| IP Rating | IP54 |
| Display | 7-inch color TFT capacitive touchscreen |
| Data Management | Onboard statistical analysis, timestamped storage, export via USB, GLP-compliant audit trail support |
| Calibration | Auto-buffer recognition (15 built-in buffers across 3 groups), 1–3-point user-defined pH calibration with slope & status display, automatic DO salinity & atmospheric pressure compensation, ATC/MTC |
| Brand | Yoke |
|---|---|
| Origin | Shanghai, China |
| Model | L-301 |
| Instrument Type | Portable |
| Measurement Principle | Fluorescence-based DO detection & Potentiometric pH measurement |
| pH Range | -2.00 to 20.00 |
| pH Resolution | 0.001 / 0.01 / 0.1 pH (user-selectable) |
| mV Resolution | 0.1 / 0.1 / 1 mV (user-selectable) |
| DO Range | 0.00–99.00 mg/L |
| pH Accuracy | ±0.02 pH |
| mV Accuracy | ±1 mV |
| pH Repeatability | ≤±0.01 pH |
| mV Repeatability | ≤±1 mV |
| Temperature Compensation | Automatic and manual modes |
| Calibration | Up to 3-point pH calibration with auto-buffer recognition |
| Display | 7-inch full-color capacitive touchscreen |
| Language Support | English and Chinese |
| Environmental Protection | UV-resistant, scratch-resistant, glove-compatible surface |
| Power | Rechargeable Li-ion battery (operating time ≥12 h typical) |
| Compliance | Designed for field and lab use per ISO 5667-3, ASTM D3693, and USP <781> water quality testing protocols |
| Brand | Yoke |
|---|---|
| Origin | Shanghai, China |
| Model | L-341 |
| Instrument Type | Portable |
| Measurement Principles | Potentiometric (pH/mV), Galvanic Cell (Dissolved Oxygen), Conductivity Bridge (Conductivity/TDS/Salinity/Resistivity) |
| pH Range | 0.00–14.00 |
| pH Accuracy | ±0.01 |
| pH Repeatability | ≤±0.01 |
| Conductivity Range | 0.000 μS/cm – 2000 mS/cm |
| Conductivity Accuracy | ±0.5% FS |
| Conductivity Repeatability | ≤±0.2% |
| Conductivity Detection Limit | 0.01 μS/cm |
| Dissolved Oxygen Range | 0.00–50.00 mg/L |
| Dissolved Oxygen Accuracy | ±0.2 mg/L |
| Dissolved Oxygen Repeatability | ≤±0.1 mg/L |
| Dissolved Oxygen Detection Limit | 0.01 mg/L |
| Temperature Compensation | Automatic & Manual |
| Display | 7-inch TFT color touchscreen |
| IP Rating | IP54 |
| Compliance | Supports GMP data integrity requirements (audit trail, user access control, data export, firmware update log) |
| Brand | Yoke |
|---|---|
| Origin | Shanghai, China |
| Model | L-401 |
| Instrument Type | Portable |
| Measurement Principle | Fluorescence Quenching |
| Range | 0.00–99.00 mg/L |
| Accuracy | ±0.2 mg/L |
| Repeatability | ≤±0.1 mg/L |
| Detection Limit | 0.01 mg/L |
| Display | 7-inch capacitive touchscreen |
| Resolution | 0.01/0.1 mg/L |
| Temperature Compensation | Automatic and manual modes supported |
| Language Options | English and Chinese UI |
| Units | mg/L and % saturation selectable |
| Operating Temperature | 0–50 °C (standard ambient range for field-portable DO meters) |
| Brand | Yoke |
|---|---|
| Origin | Shanghai, China |
| Model | L-403 |
| Instrument Type | Benchtop Laboratory Analyzer |
| Measurement Principles | Potentiometric (pH/mV), Conductometric (Conductivity/TDS/Salinity/Resistivity), Polarographic (Dissolved Oxygen) |
| pH Range | 0.00–20.00 pH |
| pH Accuracy | ±0.01 pH |
| pH Resolution | 0.001 / 0.01 / 0.1 pH (selectable) |
| mV Range | ±2000.0 mV |
| mV Accuracy | ±0.2 mV |
| mV Resolution | 0.01 / 0.1 / 1 mV (selectable) |
| Conductivity Range | 0.01 μS/cm – 100 mS/cm |
| Conductivity Accuracy | ±1% FS |
| Conductivity Detection Limit | 0.01 μS/cm |
| Dissolved Oxygen Range | 0.00–20.00 mg/L |
| DO Accuracy | ±0.1 mg/L |
| DO Detection Limit | 0.01 mg/L |
| DO Saturation Range | 0.0–200.0% |
| Temperature Range | 0–50 °C |
| Temp. Accuracy | ±0.2 °C |
| Repeatability | ≤±0.5% |
| Data Storage | Up to 2000 datasets with timestamp, operator ID, and metadata |
| Calibration Options | Auto-buffer recognition (15 built-in standards), 1–3 point pH calibration, single-point conductivity calibration (8 preloaded standard solutions), DO zero & span calibration |
| Compliance | IP54-rated enclosure |
| Software Features | Statistical analysis (mean, SD, min/max), audit trail (GMP-compliant), firmware update via USB, auto-diagnostic reporting, power-fail recovery |
| Operating System | Dual-language (English/Chinese), adjustable screen brightness & time format, configurable temperature units (°C/°F) |
| Brand | Yoke |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Authorized Distributor |
| Product Category | Domestic |
| Model | L-501 (Fluorescence Method) |
| Instrument Type | Portable |
| Measurement Principle | Fluorescence Quenching |
| Measurement Range | 0–99.00 mg/L |
| Accuracy | ±0.1 mg/L |
| Repeatability | ≤±0.05 mg/L |
| Detection Limit | 0.01 mg/L |
| Display | 7-inch Color Touchscreen |
| Parameters Displayed | DO Concentration (mg/L), Saturation (%), Temperature (°C/°F) |
| Temperature Compensation | Automatic & Manual |
| Electrode Status Monitoring | Intelligent Diagnostic Algorithm |
| Sensor Design | Solid-State Fluorescent Cap, No Electrolyte, No Polarization Required |
| Cap Replacement | Tool-Free, Quick-Swap Mechanism |
| Brand | Yoke |
|---|---|
| Origin | Shanghai, China |
| Model | L-503 |
| Instrument Type | Benchtop Laboratory Analyzer |
| Measurement Principles | pH (glass electrode), Conductivity (4-electrode AC conductivity), Dissolved Oxygen (fluorescence quenching), Temperature (Pt1000 RTD) |
| pH Range | 0.00–14.00 |
| pH Accuracy | ±0.01 pH |
| pH Repeatability | ≤±0.01 pH |
| Conductivity Range | 0.000 µS/cm–2000 mS/cm |
| Conductivity Accuracy | ±0.5% FS |
| Conductivity Detection Limit | 0.01 µS/cm |
| DO Range | 0.00–99.00 mg/L |
| DO Accuracy | ±0.2 mg/L |
| DO Repeatability | ≤±0.1 mg/L |
| DO Detection Limit | 0.01 mg/L |
| Temperature Range | –5.0 to 55.0 °C |
| Temperature Accuracy | ±0.2 °C |
| Display | 7-inch capacitive color touchscreen (1024×600) |
| IP Rating | IP54 |
| Data Storage | Internal memory for ≥2000 datasets with timestamp, operator ID, and audit trail metadata |
| Compliance | Supports GLP/GMP data integrity requirements including user-defined access levels, electronic signature readiness, and calibration history logging |
| Brand | Yoke |
|---|---|
| Origin | Shanghai, China |
| Model | L-701 |
| Instrument Type | Portable |
| Measurement Principle | Fluorescence-based Dissolved Oxygen (DO) Detection |
| DO Range | 0–99.00 mg/L |
| DO Accuracy | ±0.5% of reading (ion concentration), ±0.01 pH |
| Repeatability | ≤±0.2% |
| Detection Limit | 0.01 mg/L |
| pH/pX Range | –2.00 to 20.00 |
| pH Resolution | 0.01 pH |
| mV Range | –1999.9 to +1999.9 mV |
| mV Resolution | 0.1 mV |
| Temperature Compensation | Automatic & Manual |
| Display | 7-inch color TFT capacitive touchscreen |
| Operating System | Built-in bilingual (English/Chinese) firmware with adjustable brightness, time stamping, and °C/°F switching |
| Brand | Yoke |
|---|---|
| Origin | Shanghai, China |
| Model | M901 |
| Instrument Type | Portable |
| Measurement Principle | Fluorescence Quenching (DO), Potentiometric (pH) |
| DO Range | 0–99.00 mg/L |
| pH Accuracy | ±0.002 |
| mV Accuracy | ±0.1 mV |
| pH Repeatability | ≤±0.001 |
| mV Repeatability | ≤±0.1 mV |
| pH Range | −2.00 to 20.00 |
| pH Resolution | 0.001 |
| mV Resolution | 0.1 mV |
| Display | 7-inch color capacitive touchscreen |
| IP Rating | IP54 |
| Temperature Compensation | Automatic/manual with integrated high-stability temperature electrode |
| Brand | Yoke |
|---|---|
| Origin | Shanghai, China |
| Model | M902 |
| Instrument Type | Portable |
| Measurement Principle | Fluorescence-based Dissolved Oxygen (Note: *Correction required — device is a conductivity meter |
| Conductivity Range | 0.000 μS/cm to 2000 mS/cm |
| Accuracy | ±0.5% FS (Conductivity) |
| Repeatability | ≤ ±0.2% |
| Detection Limit | 0.01 μS/cm |
| Display | 7-inch color capacitive touchscreen |
| Temperature Compensation | Automatic/manual with integrated high-stability temperature electrode |
| IP Rating | IP54 |
| Data Compliance | GLP-compliant audit trail, calibration history logging, method recall, USB/printer/computer connectivity |
| Calibration | Multi-point (1–5 points), auto-standard recognition, calibration expiry alert |
| Sample Handling | Built-in magnetic stirrer, endpoint stability criteria configurable |
| Environmental Protection | Dust and splash resistant (IP54) |
| Brand | Yoke |
|---|---|
| Origin | Shanghai, China |
| Model | M907 |
| Instrument Type | Portable |
| Measurement Principle | Fluorescence Quenching |
| DO Range | 0–99.00 mg/L |
| DO Detection Limit | 0.01 mg/L |
| DO Accuracy | ±0.5% of reading (ion concentration) |
| Repeatability | ≤±0.2% |
| Display | 7-inch color capacitive touchscreen |
| pH/pX Range | −2.00 to 20.00 |
| pH/pX Resolution | 0.01 (default), selectable to 0.001 or 0.1 |
| mV Range | −1999.9 to +1999.9 mV |
| mV Resolution | 0.1 mV (selectable to 0.01 or 1) |
| Temperature Compensation | Automatic/manual with integrated high-stability temperature electrode |
| Data Management | GLP-compliant storage, audit trail, method recall, USB/printer/PC connectivity |
| Enclosure Rating | IP54 |
| Ion Modes | Direct concentration, standard addition, sample addition, Gran plot |
| Supported Ions | H⁺, Ag⁺, Na⁺, K⁺, NH₄⁺, Cl⁻, F⁻, and user-definable |
| Units | mg/L, g/L, mol/L, pX |
| Calibration Tracking | Auto-log with expiry alert |
| Stirring | Integrated magnetic stirrer |
| Endpoint Detection | Configurable stability criteria |
| Origin | USA |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Origin Category | Imported |
| Model | YSI 5750 Probe Compatible |
| Instrument Type | Benchtop (Not Portable) |
| Measurement Principle | Galvanic Electrochemical Sensor |
| DO Range | 0.00–60.00 mg/L (ppm) |
| Saturation Range | 0.0–600.0% |
| Temperature Range | –5.0 to +50.0 °C |
| DO Accuracy | ±0.1% FS + 0.01 mg/L |
| Saturation Accuracy | ±0.1% FS + 0.1% |
| Temperature Accuracy | ±0.1 °C |
| DO Resolution | 0.01 mg/L |
| Saturation Resolution | 0.1% |
| Temperature Resolution | 0.1 °C |
| Repeatability | ≤0.05% RSD |
| Detection Limit | 0.00 mg/L (with ±2 µg/L baseline stability) |
| Data Storage | 100 readings with timestamp (date/time stamping via internal real-time clock) |
| Membrane | Pre-tensioned 5906-type gas-permeable membrane |
| Zero Drift | Negligible (<0.002 mg/L/24 h) |
| Membrane Integrity Monitoring | Real-time diagnostic alert upon membrane breach |
| Stirring | Integrated motor-driven stirring for 5010 probe |
| Compliance | ASTM D888, ISO 5814, US EPA Method 4500-O G, GB 11913–1989 (Chinese Standard for Electrochemical DO), HJ/T 99–2003 (BOD dilution method), GB 7488–1987 (BOD₅ standard) |
| Brand | YSI |
|---|---|
| Origin | USA |
| Model | YSI 5000 Series |
| Measurement Range | 0–60 mg/L DO / 0–600% air saturation |
| Temperature Range | –5 to +50 °C |
| Resolution | 0.01 mg/L / 0.1% air saturation / 0.1 °C |
| Accuracy | ±0.1% of reading + 1 LSD (DO and % saturation) / ±0.1 °C (temperature) |
| Salinity Compensation | up to 40 ppt |
| Data Storage | 100 timestamped readings with real-time clock |
| Interface | RS-232 |
| Power | 4 × D-cell alkaline batteries or 220 V AC adapter |
| Probe Power | Instrument-supplied (no external power required for YSI 5010/5015 probes) |
| Software Compatibility | YSI BOD Analysis Software (v5.1+), EPA Method 503-compliant OUR/SOUR calculation module (YSI 5100 only) |
| Built-in Barometer | Yes (YSI 5100 only) |
| Auto-Calibration | Yes (YSI 5100 only) |
| Barcode Scanner Support | Yes (YSI 5100 only) |
| Origin | USA |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Origin Category | Imported |
| Model | 5200A |
| Instrument Type | Laboratory & Field-Deployable Benchtop Monitor |
| Measurement Principle | Polarographic Electrochemical Probe |
| DO Range | 0–60 mg/L (0–500% air saturation) |
| Accuracy | ±2% or ±0.2 mg/L (whichever is greater) for 0–200% range |
| Repeatability | 0.1% RSD |
| Detection Limit | ±0.1 ppt (for salinity) |
| Temperature Operating Range | –15 °C to +70 °C |
| Enclosure Rating | NEMA 4X, IP65, CE, ULC/CSA CUL, ETL, RoHS |
| Communication Interfaces | RS-232, RS-485, optional TCP/IP via 5402 Serial-to-Ethernet module |
| Data Storage | 1000 measurement records, 1250 alarm/event logs, 1000 configuration change entries, 500 GLP-compliant audit trails |
| Display | Backlit LCD with real-time clock |
| Power Options | 12 V DC (battery or solar compatible) or 100–240 V AC auto-switching with 12 V backup and low-voltage alarm |
| Origin | USA |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Origin Category | Imported |
| Model | 5400 |
| Instrument Type | Laboratory & Field-Deployable DO Monitoring System |
| Measurement Principle | Polarographic Electrochemical Sensor |
| DO Range | 0.01 mg/L (0–10 mg/L), 0.1 mg/L (10–60 mg/L) |
| Accuracy | ±0.2 mg/L (0–20 mg/L) or ±2% of reading (whichever is greater) |
| Repeatability | 0.1% RSD |
| Detection Limit | ±2 ppb (as O₂) |
| Origin | USA |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Origin Category | Imported |
| Model | YSI 55 / 55D |
| Price | Upon Request |
| Origin | USA |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Origin Category | Imported |
| Model | 5500D |
| Instrument Type | Laboratory & Field-Deployable Multi-Channel Monitor |
| Measurement Principle | Optical Luminescence Quenching (Ruthenium-based Sensor) |
| Dissolved Oxygen Range | 0–50 mg/L (or 0–500% air saturation) |
| Accuracy | ±1% of reading or ±0.1 mg/L (whichever is greater) for 0–20 mg/L |
| Resolution | 0.01 mg/L (≤20 mg/L), 0.1 mg/L (>20 mg/L) |
| Temperature Range | 0–45 °C |
| Temp. Accuracy | ±0.2 °C |
| Repeatability | 0.1% RSD |
| Detection Limit | <2 ppb (O₂ in water) |
| Communication | RS-485, RS-232, Ethernet (TCP/IP), Optional Wireless Module |
| Enclosure Rating | NEMA 4X, IP65, CE, ULC/CSA CUL, ETL, RoHS |
| Power Options | 12 VDC (backup capable) or 100–240 VAC auto-switching |
| Data Storage | 2000 measurement records, 1250 alarm/event logs, 1000 configuration change entries, 500 GLP-compliant audit trails |
| Software | AquaManager® (Windows 2000/XP/Vista/7/10), AquaViewer® (iOS/Android) |
| Origin | USA |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Origin Category | Imported |
| Model | YSI 550A |
| Pricing | Upon Request |