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F285 sterilizable pH electrode with VP cap

Model F-285 Sterilizable pH Probe

The new F-285 sterilizable pH electrode with built in temperature, offers the same form, fit and function as the F-235 with improved performance and USP Class VI materials. The unique construction methods used by Broadley-James allows this sterilizable pH probe to exhibit virtually zero drift after autoclaving or SIP (Steam In Place).

Ordering Information

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The Model F285 FermProbe® sterilizable pH probe is a sealed, gel-filled, design with a built-in temperature element that can be autoclaved or Steam In Place (SIP). The temperature element enables automatic compensation of Nernstian temperature effects in processes with wide pH ranges and significant temperature shifts.

The VarioPin connector allows for a multiple connection; both pH signal and temperature signal in the same wiring harness. The temperature element is either a PT100 or PT1000 Platinum Resistance Device, which are compatible with the majority of commercially available instruments. The unique construction methods used by Broadley-James allows this sterilizable pH probe to operate at pressures of up to 10bar (150psig) and temperature up to 135°C.

Features

  • Integrated RTD temperature element for temperature compensation.
  • Double-Junction Silver/Silver Chloride reference element for the ultimate in stability and resistance to contamination.
  • Specifically designed for multiple SIP, CIP, or Autoclave cycles.
  • Withstands exposure to harsh CIP solutions.
  • Metric threaded PG13.5 cap is compatible with a wide range of bioprocess electrode housings.
  • Rugged, low-impedance pH bulb provides fast and precise pH measurements even after prolonged steam exposure.

Choose Electrode Model

If the electrode needs to fit an existing cable, check cable connector. If it has a multipin connector, an F-235 or F-285 FermProbe is required. Another guideline is to note the connector’s color. If the cable connector is all stainless steel, use the F-235 or F-285 FermProbe.  The F-235 and F-285 sensors also have an integrated temperature sensor that can be used for automatic temperature compensation.

Choose Electrode Length

Benchtop Applications

The electrode length is from the base of the cap to the tip of the electrode (the glass part of the electrode).

SIP Tank Applications

If you have already chosen a housing, select an electrode length with the same Class designation as the housing. The housing ordering information box also lists the correct electrode length to order. If you have not already chosen the housing, please review the recommendations next to each electrode model below.

Confirm Cable Length and Connector

Model F-285 pH electrodes require disconnect cable and connector assemblies.

Ordering Information

Model F-285 pH FermProbe with Standard Metric Cap

Electrode Model Use with these housing models or benchtop vessel sizes Temperature sensor type Electrode Length Cable Length Connector Type VP Electrode Part Number
F-285 325, 335 Class D<1L Vessel Pt 100 120mm Order Separately F-285-B120-01-VP
Pt 1000 F-285-B120-1K-VP
F-285 325, 335 Class F1-3L Vessel Pt 100 200mm F-285-B200-01-VP
Pt 1000 F-285-B200-1K-VP
F-285 3L-5L Vessel Pt 100 225mm F-285-B225-01-VP
Pt 1000 F-285-B225-01-VP
F-285 7L-15L Vessel Pt 100 325mm F-285-B325-01-VP
Pt 1000 F-285-B325-01-VP
F-285 Many other lengths available, contact for information Pt 100 XXXmm F-285-BXXX-01-VP
Pt 1000 F-285-BXXX-01-VP

Note: the vessel sizes are for guidance only – check your own vessel dimensions or the length of the electrode you are replacing.

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