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Thermo Scientific™ Orion™ ROSS Ultra™ Refillable pH/ATC Triode™ Combination Electrode, BNC Waterproof, 8-pin MiniDIN connector with 1m cable, 120 mL x 12 mm dia.; Waterproof BNC PROMO

For any application when the use of a metallic reference electrode would contaminate the sample, you can rely on this combination electrode.

Manufacturer:  Thermo Scientific™ 8157BNUMDPM

Catalog No. 13643201PM



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 × Dia.: 120 × 12 mm


  • 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): 0.75 in.. (19 mm); collar dia. 0.62 in.. (16 mm); Cable length is 39.37 in.. (1m)


Orion ROSS Ultra Refillable pH/ATC Triode Combination Electrodes with a BNC and 8-pinminiDIN Connector and 1 meter cable
ROSS electrode 3 m KCl fill solution (Cat. No. 810007)
1 m
BNC Waterproof, 8-pin MiniDIN
Rugged Epoxy Body
pH/ATC Combination Electrode
0.03 pH for buffers using automatic temperature compensation
12 mm
Orion Versa Star, Star A and Dual Starmeters
120 mm
2 Years
Glass Fiber
0°C to 100°C
0 to 14