Ion Selective Electrode for Fluoride

 F-

Technical Data Sheet

Structure of the Electrode
range*:
  • 10-6 to 1 mole fluoride
  • 0.02 to 20,000 mg/L fluoride

The iRAS fluoride selective electrode is a solid state membrane electrode. The ion selective membrane consists of a LaF3 single crystal embedded in a plastic shaft by means of a special resin.
An Ag/AgCl standard electrode is immersed into an inner filling solution (0.1 mole KCl; 0.1 mole NaF). The inner filling electrolyte is used for discharging the equilibrium voltage.

Ordering Information

PO No. Type Description
110 100 F selective electrode with 1m sealed cable
110 101 F selective electrode with 1m sealed cable with BNC connector
110 102 F selective electrode with 1m sealed cable with DIN connector
110 005 F selective electrode with indutrial threaded head
111 004 F selective threaded mini electrode with BNC connector
slope of characteristic:
  • 57 (+-)2 mV/pF
response time in 10-3mole,
19 mg/L fluoride solution:
  • < 30 sec
drift within 30 minutes:
  • 0.3 mV
drift within 24 hours:
  • 1 mV
concentration of interfering ion species:
  • OH-: 3 103 times
  • H+(pH<5): 106 times
pH range:
  • 5 - 8
temperature range:
  • 0 - 80 °C
resistance:
  • < 0.1 MOhm
sensor material:
  • LaF3 single crystal
shaft material:
  • plastic
dimensions:
  • immersion depth 120mm
  • diameter 12 mm

* approximate values, depend upon specific application