• HI12923 is a glass body, refillable, single junction pH electrode with a quick connect DIN connector. This electrode has a triple ceramic junction in the outer reference cell and the conical pH sensing is made of low temperature glass. There is an integrated amplifier and built-in temperature sensor for automatic temperature compensated pH readings.

• The design considerations of HI12923 are ideal for pH measurement in soil and soil slurries. HI12923 is designed for use with HANNA's HI99121 portable pH meter.

• HI12923 uses low temperature (LT) glass, conical bulb, glass body, triple ceramic junction, refillable 3.5M KCl + AgCl.

Low Temperature Glass Formulation

The glass uses a special LT glass formulation that has a lower resistance of approximately 50 megohms compared to general purpose (GP) with a resistance of approximately 100 megohms. When the sample is at low temperature, as the glass temperature decreases, the resistance of the LT glass will increase approaching that of GP glass at ambient temperature. If GP glass were used, the resistance would increase to a level above the resistance of the pH meter's high impedance input. HI1292D is suitable for a measurement range of -5 to 70oC.

Conical Bulb

The conical design allows penetration into solids, semi-solids, and emulsions. HI12923 is ideal for directly measuring pH in soil and soil slurries.

Glass Body

The glass of HI12923 resists many harsh chemicals and is easy to clean. The glass body also allows heat to be quickly transferred to the internal reference electrolyte. The mV generated by the reference cell is temperature dependent. The faster the equilibrium, the more stable the reference potential.