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Thermo Scientific™ Orion™ PerpHecT™ ROSS™ Combination pH Micro Electrode PROMO

When you purchase a Thermo Scientific™ ROSS™ pH Electrode, you’ll receive a ROSS Buffer Kit at no additional cost. Order using the catalog numbers below and your products will ship together.

Supplier:  Thermo Scientific™ 8220BNWPKIT

Catalog No. 13-642-800PMO

Item Discontinued This item has been discontinued by the supplier and is no longer available. Please reach out to your sales representative.




  • 1 m cable


  • pH Meter
  • Electrode
  • Beakers - plastic or glass
  • Magnetic stirrer
  • Required solutions
  • Two pH buffers: pH 7 and pH 4 /10
  • ROSS internal filling solution: 3M KCl; Orion Cat. No. 810007

Compatible with:

  • Orion™ PerpHecT™ meters


Combination pH Micro Electrode
0 to 14
Less than 0.002 pH units/day
To ensure a quick response and free-flowing liquid junction the sensing element and reference junction must not be allowed to dry out. Short-term Storage (up to one week): Soak electrode in ROSS pH Electrode Storage Solution, Orion 810001 or use pH Electrode Storage Solution, Orion 910001. To minimize the chance of breakage the 8220BNWP should be attached to an electrode stand and suspended in a beaker that contains pH electrode storage solution. The electrode should not touch the sides or bottom of the beaker. Long-term Storage (more than one week): The reference chamber should be filled and the filling hole securely covered. Cover the sensing element and reference Junction with the protective cap/sleeve containing a few drops of storage solution. Before returning the electrode to use, prepare it as a new electrode.
1 m
0°C to 100°C
Glass double junction; Refillable
4.5 mm
155 mm
3 mm




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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.