PH/ORP Sensor
The pH and oxidation reduction potential (ORP) are measured using separate pH sensor and bare
metal platinum electrode for ORP. They both share an internal reference electrode in the pH
sensor.
pH ‐ Standard non‐fill able:
These pH sensors require the least maintenance, only to be stored clean
3 MOL KCL. Their design is a double junction type to protect the primary junction from dilution and
contamination.
pH ‐ Optional refillable:
Theseoptional pH sensorshave a refillable
secondary junction for sensor maintenance. As the electrolyte has
a higher flow it requires regular electrolyte top up and calibration.
This type of sensor is faster in responding and helps combat
accumulation of internal contamination.
Auxiliary Sensors
The probe would be fitted with an expansion housing usually featuring an external sensor clamp
and bulk head connector for power and communications/sensor voltage.
Auxiliary Sensor Electrical Characteristics:
Signal voltage required is 0 to 5 volts. The output
voltage can either be wired for battery voltage (7 ‐8.4V) or 5 volts regulated.
Auxiliary Sensor water proof cap:
If the external sensor is removed it is important to use the
supplied screw cap which will keep water out of the connector.