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™ 900100 Sure-Flow™ Reference Half-Cell Electrode

Precisely measure with ion-selective electrodes using this sleeve-type Ag/AgCl reference electrode.

Manufacturer:  Thermo Scientific™ 900100

Catalog No. 13-641-898

Add to cart



Precisely measure with ion-selective electrodes using the Thermo Scientific™ Orion™ 900100 Sure-Flow™ Reference Half-Cell Electrode, a sleeve-type Ag/AgCl reference electrode.

Ordering Information:

Reference electrode Orion 900100 is recommended for all pH and ion-selective measurements except for those:

  • In dilute solutions where the ion to be measured is contained in the filling solution of the Orion 900100
  • In solutions where an ion in the filling solution would introduce an electrode interference
  • In solutions where a species is present which forms a precipitate with an ion contained in the filling solution of the Orion 900100

For these samples, the double junction reference electrode, Orion 900200, with an appropriate intermediate filling solution, is recommended.

When filled with Orion 900001 Filling Solution, the Orion 900100 matches the potential characteristics of a conventional KCl saturated calomel electrode.

Recommended for:

  • Many ISE determinations
  • Routine pH measurements with Orion 910100 Electrodes


ISE determinations
0° to 100°C
Equitransferent solution with Ag/AgCI
900100 Sure-Flow Reference Half Cell Electrode
Orion 900001 Filling Solution
Sure-FlowSureFlow sleeve junction
0 to 14pH
Single Junction Ref Electrode
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

Limited warranty period: Subject to all warranty requirements and exclusions set out in our Terms and Conditions of Sale, this product is warranted from the date we ship the product and for ninety (90) days thereafter. 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.