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Thermo Scientific™ Orion™ ROSS™ Combination Flat Surface pH Electrodes 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.

Manufacturer:  Thermo Scientific™ 8135BNKIT

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Catalog No. 13-641-807PMO

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The 8135BN ROSS Combination Flat Surface pH Electrode measures pH of soft, moist surfaces — both solid and semi-solid —such as agar gel plates, meats, bread dough and similar samples. With drift less than 0.002 pH per day and minimized restandardization, this electrode works in extreme cases of samples varying from one another by 50°C or more.

  • Material: Epoxy body
  • pH range: 0 to 14
  • Temperature range: 0 to 100°C
  • Internal reference: ROSS
  • Junction: Glass fiber
  • Dimensions: 120 × 12 mm
  • pH precision: 0.01
  • Fill solution: Orion 810007
  • Cap diameter: 16 mm
  • Small samples are available in micro sample dish
  • Flat surface tip

Includes: One 60 mL bottle of ROSS fill Solution, 810007 and spout cap



<0.002 pH/day
32 to 212°F
Standard pH Meter, BNC connector
With BNC connector
3M KCl
1 m
Glass Fiber
Combination Flat Surface pH Electrode, BNC Connector
0°C to 100°C
0 to 14
16 mm
0.47 in.
Short-term Storage (up to one week): Soak the electrode in ROSS' pH electrode storage solution, Cat. No. 810001, or standard pH electrode storage solution, Cat. No. 910001. For enhanced electrode performance, use ROSS' pH electrode storage solution. Long-term Storage (more than one week): Fill the reference chamber and securely cover the fill hole. Cover the sensing bulb and reference junction with the protective cap, sleeve or storage bottle containing a few drops of storage solution. Before returning the electrode to use, prepare it as a new electrode.
12 mm
39 in.
Epoxy Body
Product Certifications


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