FC911B PVDF BODY FOODCARE PH ELECTRODE FOR CREAMS, SAUCES AND FRUIT JUICES WITH BNC CONNECTOR

PVDF Body Foodcare pH Electrode for Creams, Sauces, Fruit Juices with BNC connector

This design is ideal for pH measurements in samples such as creams, fruit juices, and sauces. The recommended operating temperature range is from -5 to 80°C.

Other key features:

• Durable PVDF Body
• Double Junction Reference
• Refillable Electrode

Hanna’s double junction system

As the name implies, it has two junctions, only one of which is in contact with the sample as shown in the figure. Under adverse conditions, the same tendency of sample ingress is evident.

However, as the reference electrode system is separated physically from the intermediate electrolyte area, the contamination of the electrode is minimised. The likelihood of clogging of the junction is also reduced with a double junction electrode since the outer reference cell uses a fill solution that is “silver-free”. Since there is no silver present, there is no precipitate forming to clog the junction.

General Purpose Glass Formulation

General purpose glass as the name implies is a standard glass formulation that is used for general use. A pH electrode with general purpose (GP) glass will have a resistance of 100 megaohms at 25°C and is suited for measuring pH of samples that are at ambient temperatures. The FC911B is suitable to use with samples that measure from -5 to 80°C.

Spherical Bulb

The spherical bulb is for general purpose use within the food industry. Measurements can be made in liquids or slurries that allow easy measurement of solid and semi-solid food products. Other tip shapes include conic for penetration and flat tip for surface measurements.

PVDF Body

Polyvinylidene fluoride (PVDF) is a food grade plastic that is resistant to most chemicals and solvents, including sodium hypochlorite. It has high abrasion resistance, mechanical strength and resistance to ultraviolet and nuclear radiation. PVDF is also resistant to fungal growth.

Single Ceramic Double Junction Reference

The FC911B is a double junction design. pH electrodes are available as single junction or double junction. See below for a complete description of the differences. The junction also known as a salt bridge is necessary component of the electrical circuit. The movement of ions must flow through the junction for a steady reading. The outer reference has a single ceramic frit. The ceramic is a porous material that is easily fused with the glass body and has a similar expansion coefficient. A single ceramic junction has a flow rate of 15-20 μL/hour. Other junction types are available with higher flow rates and made with different materials.

Refillable

The FC911B is a refillable probe. Since it is a double junction pH electrode the fill solution is the HI-7082 3.5M KCl. This solution does not contain any silver as with single junction electrode. The absence of silver will prevent any silver precipitate from forming at the junction surface and clogging it. Clogging of the junction will result in erratic readings.

BNC Connector

The FC911B uses a BNC connector. This type of connector is universal in that it can be used on any pH meter that has the female BNC probe input. Other type of connectors include DIN, screw type, T-type, and 3.5mm to name a few.