Thermo Scientific™ Orion™ Fluoride Ion Selective Electrode

Thermo Scientific™ Orion™ Fluoride Ion Selective Electrodes are high-performance solid-state sensors designed to deliver quick, accurate, and economical measurement of free fluoride ions (F⁻) in aqueous solutions. Compliant with Standard Methods 4500-F⁻ C-1997 and ASTM D1179-04 (B), these electrodes are trusted for routine fluoride testing in drinking water, wastewater, environmental monitoring, and laboratory analysis.

Available in combination (9609BNWP) and half-cell (9409BN, 9409SC) configurations, the electrodes offer compatibility with a variety of ion meters and laboratory setups. The Sure-Flow™ junction featured in the 9609BNWP model allows users to flush the junction to prevent clogging and extend electrode lifespan.

Key Features and Benefits

• Wide Fluoride Detection Range: From 0.02 ppm to saturation (1 × 10⁻⁶ M to saturated)
• Solid-State Sensing Element: Offers long life, chemical durability, and stable performance
• Regulatory Compliance: Meets EPA, Standard Methods, and ASTM standards for fluoride monitoring
• Refillable Design: Enables longer service life and consistent results
• Temperature Tolerance: Operates continuously from 0°C to 80°C and intermittently up to 100°C
• Multiple Connector Types:
  • 9609BNWP: Waterproof BNC connector
  • 9409BN: Standard BNC connector
  • 9409SC: Screw-cap connector (requires separate cable)
• Sure-Flow™ Junction (9609BNWP only): Allows for easy cleaning and prevents junction clogging

Model Comparison Overview

Required Accessories and Calibration Solutions

• Fluoride Calibration Standards:
  • 940906 – 0.1 M NaF
  • 940907 – 100 ppm F⁻
  • 040908 – 10 ppm F⁻ with TISAB II
  • 040907 – 2 ppm F⁻ with TISAB II
  • 040906 – 1 ppm F⁻ with TISAB II
• TISAB Buffers (Ionic Strength Adjusters):
  • 940909 – TISAB II (3.8 L)
  • 940999 – TISAB II (4 × 3.8 L)
  • 940911 – TISAB III concentrate (475 mL)
• Filling Solutions:
  • 900061 – Optimum Results A (for 9609BNWP)
  • 900001 – Single Junction Reference Fill (for 9409BN/9409SC)

Specifications (Common Across Models)

Applications

• Drinking Water Fluoride Monitoring – EPA-compliant testing
• Wastewater and Environmental Testing – Field-ready fluoride measurement
• Industrial and Educational Labs – Fluoride quantification in aqueous samples
• Food and Beverage Research – Raw material and process water quality assurance
• Chemical and Materials Research – Fluoride detection in formulations and chemical processes

Thermo Scientific™ Orion™ Fluoride Ion Selective Electrodes offer flexible, regulatory-compliant solutions for measuring fluoride in water and environmental samples. With rugged solid-state design, a wide measurement range, and multiple connector options, these electrodes meet the demanding needs of municipal labs, industrial users, and research institutions alike. Choose the model that best fits your system — from the integrated 9609BNWP to the modular 9409BN or 9409SC — and experience reliable, accurate fluoride measurement every time.