625 Quick Union In-line pH Sensor

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625 Quick Union In-line pH Sensor

Quick-Union In-line pH Sensor

The model 625 quick-union in-line pH sensor is offered in an easy-to-install configuration for insertion or submersion applications. The union-style threaded fitting locks in the sensor for extra safety and very easy removal.


The model 625 sensor is recommended for applications where frequent removal in tough applications for calibration, cleaning or quality control checks is required.


  • Quick-union design for submersion, screw-in, and flow-through applications all with one interchangeable sensor
  • Easy to lock in or remove for calibration
  • Hand-size sensor body for easy grip
  • Rugged body constructed from 1 inch Schedule 80 pipe
  • Cushion-mounted pH sensor resists shocks
  • ā€œUā€ shaped body protects glass tip from breakage during calibration, cleaning and accidental impact
  • Open electrode tip for easy cleaning
  • Large 1 inch (25 mm) diameter reference junction surrounding the pH tip resists plugging and eliminates variation in reading caused by changes in direction of flow
  • Low maintenance, easy to calibrate
  • Rapid and accurate response
  • Economical in applications where frequent removal (e.g. QC checks) is needed
Selection Guide
User Manual
Engineering Specifications

For Universal Use

  • Submersion or insertion
  • Environmental monitoring
  • Process liquids