Q46F Auto-Clean Fluoride Monitor from ATI

The Q46F Auto-Clean Fluoride Monitor provides continuous water quality monitoring of free fluoride concentration in potable water.


The Q46F Auto-Clean Fluoride Monitor provides continuous water quality monitoring of free fluoride concentration in potable water. The system employs a fluoride sensitive ion selective electrode (ISE) which provides reliable measurement down to 0.1 PPM and as high as 1000 PPM. A chemistry module provides sample conditioning for the sensor and the measured fluoride concentration is displayed on a separate electronics module that also provides alarm and analog output functions.

Fluoride is widely added to drinking water systems to help prevent tooth decay. It is normally added in the form of liquid hydrofluorosilicic acid, which can be easily handled and applied using standard metering pumps. While control of the fluoridation process is easily handled by simple flow proportional feed, water quality monitoring of final fluoride concentrations is useful in providing an alarm in the case of overfeed problems. Optimum fluoride levels of around 1 PPM are safe, but control system problems resulting in concentrations above 2 PPM are considered excessive and need to be detected as early as possible. Loss of chemical feed can also be detected quickly and reliably with on-line fluoride monitoring.


  • Analog Output Options for fluoride and temperature.
  • PID Output Control Functions
  • Digital Communications options for Profibus-DP, Modbus-RTU, or Ethernet-IP.
  • Auto-Chem Sensor Preamplifier module
  • Relay Output Options
  • Flexible Mounting Options
  • Large, Back-Lit LCD Display

Specifications – Electronic Monitor

Range 0-20.00 ppm minimum, 0-2,000 ppm maximum
Accuracy 1.0% of selected range or 0.10 ppm
Repeatability ±0.5% of selected range or 0.05 ppm
Temperature Drift 0.01% of span/°C
Power 100-240 VAC, 50/60 Hz maximum, 1o mA maximum
Analog Output 2 isolated 4-20 mA, 500Ω load maximum
Relays 3 SPDT, contacts rated 6 amp@ 250VAC, 5 amp@ 24VDC
Digital Options for Profibus-DP, Modbus RTU & TCP/IP or Ethernet IP
Display 4 digit, 0.75″ numberic LCD with 12 character second line, LED backlight
Enclosure NEMA 4X (IP-66) polycarbonate, V-0 flammabilty
Operating Temperature -20 – 60°C

Specifications – Sensor

Fluoride Sensor Combined Fluoride ion selective electrode sensor
Sensor Cable 10′ standard, 300′ max
Response Time T90 in 50 seconds
Measurement Chamber Cast acrylic
Inlet Sample Flow Rate 5-20 GPH through flowcell
Sample Inlet ¼” id hose barb
Sample Drain 1/2” id hose barb
Operating Temperature 2-40°C
Sample Pump Internal Tubing Pump, 15cc/min
Buffer Pump Internal Tubing Pump, 0.1cc/min
Weight 15 pounds

Ordering Information

For pricing please call AFC International at 800-952-3293, 219-987-6825 or fax 219-987-6826 or email sales@afcintl.com.


Q46F Auto-Clean Fluoride Monitor datasheet

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