HI1330B is a glass body, refillable, single junction pH electrode with a BNC connector. This electrode features a single ceramic junction in the outer reference cell and a small spherical pH sensing portion made of low temperature glass.

HI1330B uses low temperature (LT) glass, spherical bulb, glass body, single ceramic junction, refillable with 3.5M KCl + AgCl.

Low Temperature Glass Formulation

Measuring pH at very high temperatures is harmful to the sensitive glass bulb and will shorten its life. A pH electrode with general purpose (GP) glass has a resistance of 100 megohms at 25°C, while LT glass has a resistance of about 50 megohms at 25°C. As the temperature of the glass in the sample decreases, the resistance of the LT glass will approach that of the GP glass. If GP glass is used, the resistance will increase above the normal range, causing increased impedance and affecting the measurement. HI1330B is suitable for samples from -5 to 70°C.

Spherical Bulb

The spherical bulb is used for general purpose. Other shapes include conical for penetration and flat tip for surface measurements.

Glass Body

The glass body is ideal for laboratory use. The glass is resistant to many harsh chemicals and is easy to clean. The glass body also allows heat to be transferred quickly to the internal reference electrolyte. The mV generated by the reference cell is temperature dependent. The faster the electrode reaches equilibrium, the more stable the reference potential will be.

BNC Connector

HI1330B uses a BNC connector. This type of connector is universal in that it can be used on 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 to a specific type of meter and are not interchangeable.