Water quality sonde for measuring and monitoring surfacewater and groundwater
Water quality sonde for measuring and monitoring surfacewater and groundwater

Seametrics Multi-Parameter Water Quality Sonde

from $89.50
Configuration + Cable Length + Accessories:

Brand: Seametrics Environmental

The Seametrics Multi-Parameter Water Quality Sonde combines multiple smart sensors, an integrated data logger, and digital communications in one field-deployable monitoring system. Five standard configurations are available for measuring different combinations of pressure/level, conductivity, salinity, TDS, temperature, pH, ORP, dissolved oxygen, and turbidity.

Unlike a handheld multiparameter meter designed primarily for spot measurements, the Seametrics sonde is well suited for unattended groundwater, surface-water, remediation, discharge, and wastewater monitoring. It can operate as a stand-alone data logger or connect directly to telemetry systems, RTUs, PLCs, and monitoring networks using Modbus RTU or SDI-12.

Every configuration includes pressure/level, conductivity, salinity, TDS, and temperature. Select the configuration below based on whether your project also requires dissolved oxygen, turbidity, pH/ORP, or a combination of these measurements.

Key Features

  • Five standard sensor configurations accommodate different monitoring requirements and budgets.

  • Measures selected combinations of pressure/level, conductivity, salinity, TDS, temperature, pH, ORP, dissolved oxygen, and turbidity.

  • Integrated data logger stores measurements in non-volatile memory.

  • SDI-12 and Modbus RTU communications support connection to telemetry systems, data loggers, RTUs, and PLCs.

  • RS-485 networking allows integration with other Seametrics Smart Sensors.

  • Direct-read capability supports real-time monitoring through panel meters, RTUs, PLCs, and compatible monitoring systems.

  • Aqua4Plus Windows® software simplifies sensor setup, calibration, data retrieval, and programming.

  • View measurements in real time and export recorded data for use in spreadsheets and databases.

  • Polyethylene, polyurethane, and FEP cable options are available for different deployment environments.

  • Compatible with wireless and cellular telemetry systems for remote monitoring applications.

Lead Time: 2 weeks plus transit time

Brand: Seametrics Environmental

The Seametrics Multi-Parameter Water Quality Sonde combines multiple smart sensors, an integrated data logger, and digital communications in one field-deployable monitoring system. Five standard configurations are available for measuring different combinations of pressure/level, conductivity, salinity, TDS, temperature, pH, ORP, dissolved oxygen, and turbidity.

Unlike a handheld multiparameter meter designed primarily for spot measurements, the Seametrics sonde is well suited for unattended groundwater, surface-water, remediation, discharge, and wastewater monitoring. It can operate as a stand-alone data logger or connect directly to telemetry systems, RTUs, PLCs, and monitoring networks using Modbus RTU or SDI-12.

Every configuration includes pressure/level, conductivity, salinity, TDS, and temperature. Select the configuration below based on whether your project also requires dissolved oxygen, turbidity, pH/ORP, or a combination of these measurements.

Key Features

  • Five standard sensor configurations accommodate different monitoring requirements and budgets.

  • Measures selected combinations of pressure/level, conductivity, salinity, TDS, temperature, pH, ORP, dissolved oxygen, and turbidity.

  • Integrated data logger stores measurements in non-volatile memory.

  • SDI-12 and Modbus RTU communications support connection to telemetry systems, data loggers, RTUs, and PLCs.

  • RS-485 networking allows integration with other Seametrics Smart Sensors.

  • Direct-read capability supports real-time monitoring through panel meters, RTUs, PLCs, and compatible monitoring systems.

  • Aqua4Plus Windows® software simplifies sensor setup, calibration, data retrieval, and programming.

  • View measurements in real time and export recorded data for use in spreadsheets and databases.

  • Polyethylene, polyurethane, and FEP cable options are available for different deployment environments.

  • Compatible with wireless and cellular telemetry systems for remote monitoring applications.

Lead Time: 2 weeks plus transit time

Multi-Parameter Probe Datasheet
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Configuration Guide

Compare Seametrics Multi-Parameter Sonde Configurations

All five configurations include pressure/level, conductivity, salinity, TDS, and temperature. Choose the option that adds the water-quality measurements required for your monitoring program.

Comparison of five Seametrics Multi-Parameter Sonde configurations
Measurement Option 1 Option 2 Option 3 Option 4 Option 5
Pressure / Level ✓ ✓ ✓ ✓ ✓
Conductivity ✓ ✓ ✓ ✓ ✓
Salinity / TDS ✓ ✓ ✓ ✓ ✓
Temperature ✓ ✓ ✓ ✓ ✓
pH / ORP — — ✓ ✓ ✓
Dissolved Oxygen ✓ — — ✓ —
Turbidity — ✓ ✓ — —
Best suited for Level, conductivity and oxygen monitoring Level, conductivity and turbidity monitoring pH/ORP and turbidity monitoring pH/ORP and dissolved oxygen monitoring Core level, conductivity and pH/ORP monitoring

Option 1

Level, conductivity and dissolved oxygen

  • Pressure / Level
  • Conductivity, Salinity & TDS
  • Temperature
  • Dissolved Oxygen

Option 2

Level, conductivity and turbidity

  • Pressure / Level
  • Conductivity, Salinity & TDS
  • Temperature
  • Turbidity

Option 3

pH/ORP and turbidity monitoring

  • Pressure / Level
  • Conductivity, Salinity & TDS
  • Temperature
  • pH / ORP
  • Turbidity
Most Comprehensive

Option 4

pH/ORP and dissolved oxygen monitoring

  • Pressure / Level
  • Conductivity, Salinity & TDS
  • Temperature
  • pH / ORP
  • Dissolved Oxygen

Option 5

Core level, conductivity and pH/ORP monitoring

  • Pressure / Level
  • Conductivity, Salinity & TDS
  • Temperature
  • pH / ORP

Cable selection required: Specify the cable material and deployment length when requesting pricing. Polyethylene, polyurethane and FEP cable options are available.

Need help selecting a configuration? AWM Instruments can assist with sensor selection, cable length, power, data logging, telemetry and Modbus or SDI-12 integration.

Technical Information

Seametrics Multi-Parameter Sonde Specifications

Measurement capabilities depend on the selected sonde configuration. Consult AWM Instruments for configuration, measurement range and cable selection assistance.

Measurement Performance

Parameter Measurement Range Resolution Accuracy
Pressure Up to 100 PSIA 16-bit ±0.05% FSO typical;
±0.1% FSO maximum
Water Level Up to 231 ft H₂O
(70 m H₂O) 		16-bit ±0.05% FSO typical;
±0.1% FSO maximum
Conductivity 0–100 mS/cm 0.001 mS/cm ±0.5% of measured value
Salinity 2–42 PSU 0.001 PSU ±1% of reading or ±0.1 PSU,
whichever is greater
Total Dissolved Solids 4.9–147,000 mg/L 0.1 mg/L ±0.5% of measured value
pH 1–14 pH 0.01 pH ±0.2 pH
ORP ±1200 mV 0.01 mV ±0.1 mV
Dissolved Oxygen 0–25 ppm 0.01 ppm below 4.00 ppm;
0.1 ppm above 4.00 ppm 		±1% of reading or ±0.02 ppm,
whichever is greater
Turbidity 0–400 NTU or
0–3000 NTU 		3 NTU ±2% at 25°C or ±2 NTU,
whichever is greater
Temperature −5 to 40°C
(23 to 104°F) 		0.1°C ±0.5°C

General Specifications

Standard Configurations Five
Data Logging Integrated logger with non-volatile memory
Communications RS-485 Modbus RTU and SDI-12 version 1.3
Direct Modbus Output 32-bit IEEE floating point
SDI-12 Output ASCII
External Power 12 VDC nominal; 9–15 VDC operating range
Adapter Material Acetal with included strain relief
Sensor Tube Materials 316 stainless steel or titanium
Wire-Seal Materials Fluoropolymer and PTFE
Cable Materials Polyethylene, polyurethane or FEP
Maximum Cable Diameter 0.28 in (0.7 cm)
Cable Break Strength 138 lb (62.7 kg)
Maximum Technical Cable Length Up to 2,000 ft (610 m); confirm available lengths when ordering
Cable Weight Approximately 4 lb per 100 ft (1.8 kg per 30 m)
Minimum Well Diameter Fits a 2 in (5.1 cm) well
Software Seametrics Aqua4Plus for configuration, real-time viewing and data export

Note: Measurement parameters and specifications depend on the selected configuration. Specifications are subject to change. Confirm product suitability and current specifications before ordering.

Typical Applications

Water Quality Monitoring Applications

Configure the Seametrics Multi-Parameter Sonde for continuous or intermittent monitoring across environmental, agricultural and wastewater applications.

Surface Water Monitoring

Track changing water-quality conditions in rivers, streams, lakes, reservoirs and wetlands.

Groundwater Monitoring

Measure water level and water-quality parameters in monitoring wells, aquifers and groundwater networks.

Agricultural Runoff Studies

Monitor conductivity, turbidity and other parameters in irrigation return flows and agricultural drainage.

Discharge Monitoring

Document water-quality conditions at industrial, municipal and environmental discharge points.

Aquaculture

Monitor dissolved oxygen, pH, temperature and conductivity in fish farms, hatcheries and aquatic systems.

Leachate Monitoring

Measure changing level and water-quality conditions in landfill leachate and containment systems.

Remediation Performance Monitoring

Evaluate water-quality trends before, during and after groundwater or surface-water remediation.

Wastewater Treatment Discharge

Continuously monitor treated effluent and help document discharge conditions at wastewater facilities.

Learn More About the Seametrics Multi-Parameter Sonde