Thermo Scientific™ Orion™ ROSS Ultra™ Refillable pH/ATC Triode™ Combination Electrodes for Orion Series Meters Available on GSA/VA Contract for Federal Government customers only.

Measure biological media, pharmaceuticals, foods and more with Thermo Scientific™ Orion™ ROSS Ultra™ Refillable pH/ATC Triode™ Combination Electrodes.

Manufacturer: Thermo Scientific™ 8157UWMMD

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Catalog No. 13-643-202


This item has been discontinued by the manufacturer and is no longer available. Please call customer service for assistance: 1-800-766-7000. 


    Warranty 2 years
    Description Orion ROSS Ultra Refillable pH/ATC Triode Combination Electrodes with a BNC and 8-pin MiniDIN Connector and 3 meter cable
    Diameter (Metric) 12mm
    Length (Metric) Cable 3m
    Connector Types BNC Waterproof, 8-pin MiniDIN
    For Use With Thermo Scientific Orion Versa Star, Star A, and Dual Star meters
    pH Range 0 to 14
    Internal Reference ROSS
    Precision 0.01
    pH Relative Accuracy 0.03pH for buffers using automatic temperature compensation
    Temperature (Metric) Operating 0° to 100°C
    Material Rugged epoxy body
    Junction Glass fiber
    Isopotential Point 7
    Filling Solution Type ROSS electrode 3 M KCl fill solution (Cat. No. 810007)
    Length (Metric) 120mm

    Measure biological media, pharmaceuticals, foods and more with Thermo Scientific™ Orion™ ROSS Ultra™ Refillable pH/ATC Triode™ Combination Electrodes. They are ideal for any application where the use of metallic reference electrodes would contaminate the samples. ROSS Ultra pH/ATC electrodes offer more flexibility, accuracy and precision for your pH measurement needs. With built-in temperature sensors, these electrodes offer a convenient solution for your routine sample measurements. They have great stability and drift and come with a two-year replacement warranty.

    Unique internal element system replaces Ag/AgCl or Hg2Cl2 internals with platinum wire and redox-couple filling solution. Double-junction reference cells have porous ceramic or glass fiber outer junction. Design provides stable potential, independent of temperature, and stable readings even when samples vary by 50°C (90°F) or more. Minimizes drift, stirring effects, clogged junctions; no need for frequent standardization so samples are analyzed faster.

    • Epoxy body for durability and ruggedness
    • Built-in ATC probe
    • General-purpose applications
    • Standard size and standard bulb
    • Glass fiber junction
    • L x Dia.: 120 x 12mm


    • 0 to 14pH
    • 0° to 100°C (32° to 212°F) range
    • Slope, 92 to 102%; isopotential point, pH 7
    • When standardized in 6.86pH buffer at 25°C (77°F), accuracy is ±0.03pH for the buffer from 0° to 100°C (32° to 212°F) (using ATC); response is stable to 0.01pH within 30 seconds at 25°C (77°F) and 75°C (167°F) and stable to ±0.002pH within 15 seconds when cycling between pH 6.86 and 4.01 buffers at 25°C (77°F)
    • Max. cap dia. (top): 0.75in. (19mm); collar dia. 0.62in. (16mm); Cable length is 39.37in. (1m)

  • Description & Specifications

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