Promotional price valid on web orders only. Your contract pricing may differ. Interested in signing up for a dedicated account number?
Learn More

Thermo Scientific™ Orion™ Fluoride Electrodes

Quickly, simply, accurately and economically measure free fluoride ions in aqueous solutions with these fluoride electrodes.

Supplier:  Thermo Scientific™ 9409BN

 View more versions of this product

Catalog No. 13-641-942

Add to cart



Measure free fluoride ions in aqueous solutions quickly, simply, accurately and economically with the Thermo Scientific™ Orion™ Fluoride Electrodes. The Thermo Scientific™ Sure-Flow™ junction allows easy cleaning and is easy to use in tough samples.The half-cell electrode requires a separate reference electrode. We recommend the reference electrode 900100 to be used with the half-cell electrodes 9409BN and 9409SC


The measurement of fluoride in drinking water using an ion selective electrode is an approved ASTM method: ASTM D 1179 A separate reference electrode is unnecessary with the combination fluoride electrode, making it convenient to use with small sample volumes.

  • Free-flowing Sure-Flow junction assures stable, drift-free potentials.
  • When conventional electrode junctions clog, the Sure-Flow junction can be opened and flushed clean simply by pressing the cap.
  • Fluoride Half-Cell Electrode used in conjunction with the Orion 900100 Single Junction Reference electrode offers the benefits of the Sure-Flow junction design:
    • Calibration standards catalog number: 940906 — 0.1 M NaF; 940907 — 100ppm F-; 040906 — 1ppm F- with TISAB II; 040907 — 2ppm F- with TISAB II; 940908 — 10 ppm F- with TISAB II
    • Required ISA catalog number: 940909 — TISAB II; 940911 — TISAB III


BNC adapter is required with this product as a onetime purchase. Part Number: 13-641-890
0.51 in.
900061 (9609BNWP and 960900); 900001 with 900100 single junction reference electrode (9409BN, 9409SC, and 940900)
39 in.
Continous: 32° to 176°F; Intermittent: 32° to 212°F
Approved by ASTM method and approval number is ASTM D 1179
Continuous: 0° to 80°C; Intermittent: 0 to100°C
Solid State Half-Cell
4.33 in.
Fluoride half-cell w/ BNC connector
ISE Meters
Single Cell Ion Selective Electrode


Product Certifications


Provide Content Correction

We continue to work to improve your shopping experience and your feedback regarding this content is very important to us. Please use the form below to provide feedback related to the content on this product.

Product Title

By clicking Submit, you acknowledge that you may be contacted by Fisher Scientific in regards to the feedback you have provided in this form. We will not share your information for any other purposes. All contact information provided shall also be maintained in accordance with our Privacy Policy.

Cancel Submit

Disclaimer to internal research use restriction: Any restrictions on the purchaser to utilize the product(s) for internal research purposes only does not apply to the product(s) on the web pages associated with this statement.