Refillable, combination pH electrode; Use for general laboratory purposes and beer, screw cap connector

With a double junction design and the ability to change out contaminated electrolyte, this economical pH electrode ensures great results in your laboratory, clean water testing and beer production.

• High temperature glass can stand up to the effects of elevated temperatures leading to longer probe life

The HI-1131S uses high temperature (HT) glass, spherical bulb, glass body, single ceramic reference, double junction and is refillable with 3.5M KCl.

High Temperature Glass Formulation

The measurement of pH at very high temperatures is detrimental to the sensitive glass bulb and will shorten the life of it. A pH electrode with general purpose (GP) glass will have a resistance of 100 megaohms at 25°C, while the resistance of HT glass is around 400 megaohms at 25°C. As the HI-1131S is used at elevated temperatures, the resistance decreases to approach that of GP glass. The HI-1131S is suitable to use with samples that measure from 0 to 100°C.

Spherical Glass Tip

The spherical bulb is for general purpose use. Other tip shapes include conic 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 easily cleaned. The glass body also allows for a fast transfer of heat to the internal reference electrolyte. The mV generated by the reference cell is temperature dependent. The faster the electrode reaches equilibrium, the steadier the reference potential.