Product Overview

• FC200B is a PVDF body, gel-filled, single junction pH electrode with a BNC connector. This probe features an open junction design with a sensing bulb made of low temperature glass and a food-grade plastic body.

• This design consideration makes it ideal for pH measurement in the food industry, including dairy products, dough, ground meat and other semi-solid food samples. The recommended operating temperature range is 0 to 50°C.

• Low temperature glass

• Open junction

• Hanna Instruments offers a wide variety of pH electrodes that can be used in many different applications. The type of glass used to sense pH, bulb shape, body material, connection type, reference type and electrolyte used are just some of the design considerations.

• FC200B uses low temperature (LT) glass, a conical bulb, a food-grade PVDF body, and is open junction with viscolene gel electrolyte.

Figure 1 details:

• Low temperature glass formulation

• The glass tip uses a special LT glass formulation with a resistance of approximately 50 megohms compared to general purpose (GP) with a resistance of approximately 100 megohms. This is beneficial because many foods are stored at low temperatures. As the temperature of the glass in the sample decreases, the resistance of the LT glass will increase, approaching the resistance of GP glass at ambient temperature. If GP glass is used, the resistance will increase above the optimum resistance for the high impedance input of the pH meter. FC200B is suitable for samples from 0 to 50°C.

Figure 2 details:

• Conical glass tip

• The conical tip design allows penetration into solid, semi-solid and emulsion samples for direct measurement of pH in foods including meat, cheese, yogurt and milk.

Figure 3 details:

• 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 UV and nuclear radiation. PVDF also resists fungal growth.

Figure 4 details:

• Open reference

• Suspended solids and proteins found in food can clog traditional ceramic reference junctions. This clogging will impede the measurement circuit between the indicating electrode and the internal reference, resulting in slow response times, unstable readings and frequent electrode replacement. The open junction design consists of a solid gel interface (viscolene) between the sample and the internal Ag/AgCl reference. This interface not only prevents silver from entering the sample, but also makes it less prone to clogging, resulting in fast response and stable readings.

Figure 5 details:

• BNC connector

• FC200B uses a BNC connector. This type of connector is universal in that it can be used with any pH meter with a female BNC probe input. Other types of connectors include DIN, screw type, T-type and 3.5mm, etc. These types of connectors tend to be proprietary connectors for specific types of meters and are not interchangeable.