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Fluoride Monitor

  • Low running cost system
  • Full 2 point calibration

ATI Model (A15-82)

This fluoride monitor delivers uninterrupted measurements of free fluoride concentrations in drinkable water. The fluoride sensitive ion selective electrode (ISE) offers dependable measurements from 0.1PPM to as high as 1000PPM.


General issues and standard usage:

A straightforward flow proportional feed can regulate the fluoridation procedure; however, monitoring of the final fluoride concentration is helpful as it can raise the alarm if there are any overfeed issues.


Optimal fluoride levels of around 1PPM are safe. On the other hand, control system issues causing concentration levels above 2PPM are regarded as excessive and will need to be identified as soon as possible. Chemical feed deficiency can also be distinguished rapidly and consistently with online fluoride monitoring.


How it works: 

Fluoride ISE (sensitive ion selective electrode) measures F-ion in solution in the exact same way as a pH sensors measure hydrogen ions. The lanthanum fluoride crystal at the end of the sensor creates a current that is relational to fluoride ion activity. A primary reference electrode is employed as a comparator to determine the developed voltage; with the measurement completed at a differential input amplifier. As the movement of fluoride ions in solution is a function of pH and ionic strength, a tiny amount of buffer solution is combined with the measured sample.


This then produces a stable condition in which the intensity and movement of fluoride ion are directly relational. In operation, a little amount of sample is injected into the system and merged with the buffer solution. The treated sample then runs into a chamber where the amalgamated fluoride ISE is mounted. The non-stop flow of sample is measured here and changes in concentration are reflected at the monitor immediately. The chamber drains back to the waste side of the sample inlet overflow chamber.


Features and Benefits:

  • Independent electronics module providing an alarm and analogue output utilities, along with sample conditioning for the sensor and the measured fluoride concentration.
  • Low maintenance – one gallon of buffer can work the system for around 45 days. The system also carries out automatic calibration routines to amend electrode “zero” drift.

Technical Specifications:

Electronic Monitor

  • Range: 0-1.00 PPM minimum, 0-1000 PPM maximum
  • Accuracy: ± 5% of span
  • Repeatability: ± 2% of span
  • Drift: < 0.1 PPM per month

Chemistry Module

  • Sensor Cable: 10 feet standard
  • Response Time: T90 = 90 seconds
  • Sample Pump: Internal tubing pump, 5 cc./min.
  • Buffer Pump: Internal tubing pump, 0.05 cc/min.
  • Temperature Limits: 0-50° C.

Please download the technical documentation for further details.