F-615 Sterilizable pH Electrode

Name: F-615 Sterilizable pH Sensor
SKU: F-615
Availability: InStock

The F-615 style offers a T-pull handle which makes installation and cable routing easy in large tanks. Typically used in steel vessels 20 liters and up, this design is very robust and withstands multiple SIP and CIP cycles. Steam sterilizable.

Rugged T-Pull^® Handle with ¾-20 threaded retainer nut to secure sensor into a 25 mm sensor housing.

Sensor housings available for both Mettler and Sartorious style 25 mm side ports.

Housings available in both guarded and unguarded styles, and in a selection of sensor lengths.

The T-Pull^{^®} and standard style FermProbe pH Sensors are designed to be used in bioprocess applications where CIP/SIP procedures are used. Built to withstand repeated steam sterilization cycles, the FermProbe quickly stabilizes after steam exposure to be back on-line in half the time of other electrodes. This rugged, low impedance, pH electrode continues to provide fast and precise pH measurements even after harsh use and prolonged steam exposure.

The FermProbe F-615 sterilizable pH electrode design specifies that the pH electrode be secured to the housing by a free-spinning threaded retainer nut. This allows the electrode to be installed or removed from the housing without twisting or disconnecting the electrode cable.

T-Pull^{^®} Handle F-615 sterilizable pH Sensor

The T-Pull handle eases installation and removal of the electrode from the housing. The electrode can be easily removed from the housing without being rotated or twisting the cable. This greatly reduces cable fatigue.

Features

Rugged handle design eases removal of electrode from housing. No tools required.
Greatly reduces cable fatigue.
Electrode retainer nut is part of the handle. Cannot be lost or misplaced.
Available with disconnect cap or integral cable.

Sensor Specifications

FermProbe F-615 sterilizable pH Sensor Specifications:

Measurement Range	0–14 pH
Operational Temp. Range	-5°–135° C [23°–275° F]
Operational Pressure Range	0-7750 mmHg [0-150 psig]
Storage Temperature	5°–50° C [41°–122° F]
Shelf Life	12 months
Sensor Connector	S8, Coaxially Shielded
Sensor Connector Cable	AX-1000-HP-XXXX series

Wetted Materials

O-ring	FDA Compliant Silicone
pH Glass Electrode	Lead-free Glass
Ceramic Junction	Alumina Silicate

Sensor Housings

The F-615 pH Electrode has a metric Pg13.5 threaded polymer cap allowing it to be used with European style housings. We recommend the following Broadley-James sensor housings for use with the FermProbe F-615 sterilizable pH electrode:

Model 320 Unguarded Sensor Housing – Standard 25mm, typical electrode insertion lengths 37mm, 66mm & 113mm
Model 330 Guarded Sensor Housing – Standard 25mm, typical electrode insertion lengths 52mm, 81mm & 128mm
The 130mm F-615 FermProbe electrode can also be used with Models 326, 336, 350 & 357

Compatible Cables

The T-Pull style F-615 pH Electrode uses a standard S8 detachable cable connection. We recommend the following cables for use with it:

Cable Type	Sensor Connector & Device Connector	Device Terminal
HP Plug to BNC Plug, Type A
HP Plug to BNC Plug, Type M
HP Plug to DIN Plug, Type M
HP Plug to Crimped Ferrules, Type M
HP Plug to Ferrules, Solution Ground, Type N

Choose Electrode Length

If you have already chosen a sensor 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-615 sterilizable pH electrodes require a disconnect cable and connector assembly (see the Accessories tab for information about compatible cables). If you need a different cable length or connector, please call the Sales Department for more information.

Ordering Information

Model F-615 pH FermProbe with T-Pull Handle & Disconnect Cap

Electrode Model	Class	Use with these Housing Models	Electrode Length	Cable Length	Connector	Electrode Part Number
F-615	A	320, 330, 326, 336, 350, 357	130 mm	Order Separately (See Accessories tab)		F-615-B130-DH
F-615	B	320, 330	160 mm			F-615-B160-DH
F-615	C	320, 330	210 mm			F-615-B210-DH

FAQs

How Should FermProbes Be Stored?

Never store a pH electrode dry. The first choice for storing FermProbes is KCl solution. We recommend any concentration between 2.0 M and 3.8 M. Another good choice is buffer solution. A pH 4 buffer solution is best since it will keep longer, but pH 7 is also acceptable. If it is necessary to clean a FermProbe with acid, caustic, solvent or other cleaning solution, it is best to soak the electrode in KCl solution after cleaning and prior to use or calibration. This will re-condition the bulb and reference, extending the probe life and improving calibration accuracy.

What's inside a FermProbe?

The gel in a FermProbe^® is a non-toxic, USP grade, organic material. Other manufacturers may use different materials such as polyacrylamide. Please call us for more information or an MSDS.

What is a pH Electrode Life Expectancy?

How long should an electrode last in storage?

Fermprobes can be stored for up to one year from date of shipment with no appreciable change in their performance or expected service life. After a year, the electrodes are still good but their potential for optimum performance slowly erodes until they finally become totally non-functional. This would usually take many years of storage. Most customers try to rotate stock so electrodes are put into service prior to one year from shipment, and this would be our strong recommendation for most customers.

How long should an electrode last in actual service?

Fermprobe pH electrodes exhibit a fairly predictable "lifetime vs. temperature" performance ratio. The higher the temperature, the shorter the life; and, the longer the duration of exposure to elevated temperature, the shorter the life. Maximum temperature advisable is 135°C.

For example:

A Fermprobe may last 40 sterilization cycles at 121°C for 30minutes. (20 hours at 121°C)
A Fermprobe may last 20 sterilization cycles at 121°C for 60minutes. (20 hours at 121°C)
A Fermprobe may last 20 sterilization cycles at 135°C for 30minutes. (10 hours at 135°C)
A Fermprobe may last 10 sterilization cycles at 135°C for 60minutes. (10 hours at 135°C)

The actual service life attained will depend upon all other considerations, such as whether or not there is a CIP cycle (strong, hot caustics can dissolve the glass and the ceramic), whether or not the sensor is exposed to high pressure or fast flow rates, whether or not there are abrasives in the sample, etc.. Since there are so many variables and factors involved in determining electrode life, an operator can best determine the life for his particular vessel and set of conditions experimentally. By careful recording of when the electrodes are installed and a statistical analysis of typical life, one can determine the optimum number of cycles.

There is a normal variance in electrode life and most operators of production vessels will search out a number, perhaps 10 cycles, that gives them a maximum confidence in the ability to run a cycle without failure. It is a helpful exercise to take the cost of the electrode and divide it by the number of cycles, then look at this "cost per cycle" to see if it is justifiable for a particular product.

F-615 Sterilizable pH Electrode

Ordering Information