PH-1000A Analogue pH Sensor

The Greenspan PH-1000A has a 4-20mA output with 47mm outer diameter suitable for 2″ boreholes. PH-1000L logging pH sensor also available.

General Applications of pH sensor (PH-1000A)

  • Sewer monitoring
  • Monitoring of streams and rivers, lakes and urban waterways
  • Catchment studies and forestry management
  • Water supply storages including stratification studies
  • Water and wastewater treatment monitoring
  • Groundwater analysis and monitoring
  • Industrial process, Acid Sulphate studies
  • Tidal, estuary and oceanographic monitoring


The sensor features a field replaceable, gel-filled pH electrode. The electrode’s reference is protected by a special porous PTFE ring which is impregnated with a special conductive gel. The protection ring prevents chemical or biological fouling from reaching the reference, extending the life of the combination electrode. At the end of its life, the electrode can be replaced by the user in the field without the need to return the sensor to the factory.


Measurement Technique: Gel-filled glass electrode with internal Ag/AgCl reference, Field Replaceable electrode

Sensor range (factory calibrated): 0–14 pH (4 mA = 0 pH, 20 mA = 14 pH)

Sensor output: Analogue 4-20 mA

Power Supply: 11-13.2V DC

Dimensions (L x OD) 364.5 mm × 47 mm (14.35″ × 1.85″)

Additional information

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