Portable Multiparameter Water Quality Meter ST 860
Multiparameter portable water quality meter contains the 8 measurement modes. The meter is used for measuring the pH, ORP, Ion concentration, Conductivity, TDS, Salinity, Resistivity and Dissolved Oxygen of the liquids.
pH Mode:
• Portable multiparameter water quality meter is equipped with a large backlit LCD display.
• 1 to 5 points push-button calibration with auto-buffer recognition.
• Selectable pH buffer standard (USA/NIST/DIN) or using the custom calibration solutions.
• Automatic electrode slope display helps user decide whether to replace sensor.
ORP Mode:
• Single point offset calibration allows adjusting the displayed value to a known standard.
• Relative and absolute millivolts measurement modes provide accurate ORP readings.
Ion Mode:
• 2 to 5 points calibration including the eight concentration calibration points can be selected.
• Automatically recognize ion selective electrodes, does not need to specify type of ion.
• Direct ion concentration readout simplifies the elaborate measurement process.
• Selectable multiple concentration units include the ppm, mg/L and mol/L.
Conductivity/TDS/Salinity/Resistivity Mode:
• 1 to 5 points push-button calibration with automatic calibration solution recognition.
• Selectable cell constant (0.1/1/10), normalization temperature (20/25°C), TDS conversion factor,
seawater and practical salinity measurement modes.
• Linear or pure water compensation improves measurement accuracy of meter.
Dissolved Oxygen Mode:
• 1 or 2 points calibration using the air-saturated water and zero oxygen solution.
• Manual salinity and barometric pressure compensation improve the measurement accuracy.
Other Features:
• Automatic Temperature Compensation provides accurate reading over the entire range.
• Calibration Due Reminder prompts user to calibrate the meter regularly.
• Stability indicator automatically shows current measurement status.
• Auto-Hold function freezes stable measured value for easy viewing and recording.
• Manual temperature calibration corrects temperature deviation.
• Selectable temperature unit (°C or °F) meets different application requirements.
• Automatic electrode diagnosis shows zero point offset and slope of the electrode.
• Help message as a operational guide that helps you quickly begin using the meter.
• System menu allows setting the 15 parameters, including the number of calibration points,
resolution, stability condition, measurement unit, etc.
• Reset feature automatically resumes all parameters back to factory default settings.
• Expanded memory stores and recalls up to 500 readings.
• Built-in real-time clock stamps stored data to meet GLP standard.
• Stored data can be transferred into computer by USB communication interface.
• Multi-mode power scheme (battery, power adapter, computer’s USB port) ensures that use the meter smoothly.
Specification :
| pH | ||
| Range | -2.000~20.000pH | |
| Accuracy | ±0.002pH | |
| Resolution | 0.1, 0.01, 0.001pH, Selectable | |
| Calibration Points | 1 to 5 points | |
| Calibration Solutions | USA, NIST, DIN or User-defined | |
| Temperature Compensation | 0~100°C, 32~212°F | |
| Compensation Mode | Manual or Automatic | |
| mV | ||
| Range | -1999.9~1999.9mV | |
| Accuracy | ±0.2mV | |
| Resolution | 0.1, 1mV, Selectable | |
| Calibration Points | 1 point (Only for Relative mV mode) | |
| Calibration Range | ±200mV | |
| Ion | ||
| Range | 0.001~19999ppm, mg/L, mol/L (Refer to the range of ISE) | |
| Accuracy | ±0.5% F.S (Monovalent), ±1% F.S (Divalent) | |
| Resolution | 0.001, 0.01, 0.1, 1 | |
| Calibration Points | 2 to 5 points | |
| Calibration Solutions | 0.001, 0.01, 0.1, 1, 10, 100, 1000, 10000ppm, mg/L, mol/L | |
| Temperature Compensation | 0~100°C, 32~212°F | |
| Compensation Mode | Manual or Automatic | |
| Conductivity | ||
| Range | 0~20.00, 200.0, 2000µS/cm, 20.00, 200.0mS/cm | |
| Accuracy | ±0.5% F.S | |
| Calibration Points | 1 to 5 points | |
| Calibration Solutions | 10µS/cm, 84µS/cm, 1413µS/cm, 12.88mS/cm, 111.8mS/cm | |
| Temperature Compensation | 0~100°C, 32~212°F, Manual or Automatic | |
| Temperature Coefficient | 0.0~10.0%/°C | |
| Compensation Modes | Linear or Pure Water | |
| Cell Constant | K=0.1, 1, 10 or User-defined | |
| Normalization Temperature | 20°C or 25°C | |
| TDS | ||
| Range | 0~100ppt (Max. 200ppt, depending on factor setting) | |
| Accuracy | ±1% F.S | |
| TDS Factor | 0.1~1.0 (Default 0.5) | |
| Salinity | ||
| Range | 0~10ppt (Max. 80ppt) | |
| Accuracy | ±1% F.S | |
| Measurement Modes | Seawater or Practical Salinity | |
| Resistivity | ||
| Range | 0~100MΩ | |
| Accuracy | ±1% F.S | |
| Resolution | 0.01, 0.1, 1 | |
| Dissolved Oxygen | ||
| Range | 0.00~20.00mg/L (or ppm) | |
| Accuracy | ±0.2mg/L | |
| Resolution | 0.01mg/L | |
| Calibration Points | 1 or 2 points | |
| Temperature Compensation | 0~50°C, 32~122°F, Automatic | |
| Pressure Correction | 60.0~112.5kPa, 450~850mmHg | |
| Salinity Correction | 0~50g/L | |
| % Saturation of Oxygen | ||
| Range | 0.0~200.0% | |
| Accuracy | ±2.0% | |
| Resolution | 0.1, 1% | |
| Temperature | ||
| Range | 0~105°C, 32~221°F | |
| Accuracy | ±0.5°C, ±0.9°F | |
| Resolution | 0.1°C | |
| Calibration Points | 1 point | |
| Calibration Range | Measured value ±10°C | |
| Others | ||
| Hold Function | Manual or Automatic | |
| Stability Conditions | Low or High | |
| Calibration Due | 0 to 31 days | |
| Power Off | Manual or Automatic (10, 20, 30 minutes) | |
| Reset Function | Yes | |
| Memory | Stores up to 500 data sets | |
| Output | USB Communication Interface | |
| Connector | BNC, 6-pin Mini Plug | |
| Power Requirements | 3×1.5V “AA” Batteries | |
| Battery Life | Approximately 150 hours (Turn off the backlit) | |
| Dimensions | 170(L)×85(W)×30(H)mm | |
| Weight | 300g |
Precise Dissolved Oxygen Measurement for Water Quality and Process Control
Portable Multiparameter Water Quality Meter ST 860 Ensure accurate, real-time monitoring of dissolved oxygen (DO) levels with our versatile range of dissolved oxygen meters—essential tools for environmental testing, wastewater treatment, aquaculture, biotechnology, and laboratory research. Whether you’re assessing aquatic ecosystem health, optimizing aeration in treatment plants, or controlling fermentation processes, our DO meters deliver reliable, lab-grade results in the field or on the bench.
Advanced Technology for Consistent Accuracy
Our dissolved oxygen meters utilize either electrochemical (galvanic/polarographic) or optical (luminescence-based) sensor technology—both offering high sensitivity, fast response, and long-term stability. Optical sensors require no membrane replacement or electrolyte refills, while electrochemical probes provide proven performance at an accessible price point.
- Wide DO Range – Measures from 0.00 to 20.00 mg/L (ppm) or 0–200% saturation, suitable for freshwater, seawater, and process streams.
- Automatic Temperature & Salinity Compensation – Ensures accurate readings across varying environmental conditions.
- Barometric Pressure Correction – Built-in or manual pressure adjustment for altitude and weather-related accuracy.
- Rugged, Portable Designs – IP67-rated handheld models for field use; benchtop versions for lab precision.
- Data Logging & Connectivity – Store hundreds of readings with timestamps; export via USB or Bluetooth for reporting.
- Low Maintenance & Calibration Alerts – Intuitive prompts for zero-point or saturation calibration to maintain compliance.
Trusted for Critical Applications
From regulatory compliance (EPA, ISO 5814) to protecting fish stocks in aquaculture, accurate DO measurement is non-negotiable. Our meters support GLP/GMP standards, feature durable construction, and are designed for minimal drift—so you can trust your data, run after run.
Whether you need a simple spot-check tool or a fully traceable monitoring system, our dissolved oxygen meters offer the precision, durability, and ease of use your work demands.
Make every measurement count—with confidence in your water’s most vital parameter.
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