pH sensor & electrode

  • pH electrodeIdeal for wastewater, research and environmental monitoring applications
  • Simultaneous measurements of pH, redox and temperature
  • RS-485 or SDI-12 output
  • Easy to use and maintain with interchangeable cartridges
  • Calibration data stored inside of pH sensor


related products


The Aqualabo pH sensor has been designed to perform under hard conditions from pure mountains water with conductivity as low as 20 μS/cm, lakes and rivers (100–2000 μS/cm), seawater with conductivity of 50 mS/cm and to wastewater with conductivity higher than 200 mS/cm.

This sensor features a “long life” reference. The Plastogel® PONSEL technology increase the life time of the probe the need to refill.

This sensor has been designed also for handheld and in situ applications which have been the most difficult situations for a pH/ORP sensor in term of sensor resistance, quick time response, minimal flow dependence and low power consumption.


digital technology
The “smart” pH/Redox/Temp sensor stores calibration and history data within the sensor. This allows you a “plug and play” system without re-calibration. Thanks to the Universal Modbus RS485 protocol, the Aqualabo pH/Redox/T sensor can be connected to all devices commonly used.


feature specification
pH Electrode
Measurement Principle Combined electrode (pH/ref) : special glass, Ag/AgCI ref. Gelled electrolyte (KCI)
Measurement Range 0 – 14 pH
Resolution 0.01 pH
Accuracy +/- 0.1 pH
Redox Electrode
Measurement Principle Combined electrode (Redox/reference) : Platinum tip, Ag/AgCI AgAgCl. Gelled reference (KCI)
Measurement Range – 1000 to + 1000 mV
Resolution 0.1 mV
Accuracy +/- 2 mV
Temperature Sensor
Measurement Principle NTC
Measurement Range 0.00 °C to +50.00 °C
Resolution 0.01 °C
Accuracy +/- 0.5 °C
General Specifications
Calibration Frequency pH electrode needs re-calibration every 3 weeks
pH Cartridge Replacement Frequency Every 12 months
Response Time 5 seconds
Storage Temperature 0°C to + 60°C
Environmental Protection IP68
Interface Modbus RS-485 / SDI-12 (option)
Power Supply 5 to 12 V
Power Consumption Standby : 25μA; Average RS485 (1 measure/second) : 3.9 mA; Average SDI12 (1 measure/second) : 6.8 mA
Current Pulse 500 mA
Sensor Dimensions Diameter : 27 / 21 mm; Length : 207 mm; Weight: 350 g (sensor + 3 m cable)
Material PVC, DELRIN, special pH glass, platinum, polyamide
Pressure 5 bars (approx. 50m depth)
Cable Coaxial armoured, Polyurethane, bare wire or Fisher connector


manual and specification sheet

pH Sensor Specification Sheet