HI12301

Description

The HI12301 is a plastic body, double junction, gel filled pH electrode with a matching pin and built-in temperature sensor for temperature compensated measurements in a single probe design. This probe features a 3.5 mm connector designed exclusively to be used with Hanna Instruments edge® Tablet Meters.

The HI12301 electrode features a built-in microchip that stores sensor type, serial number, and calibration information. It also features a single ceramic junction and the spherical pH sensing portion is made with general purpose glass. The electrode has a rugged PEI (polyetherimide) body that has the chemical resistance of a glass body in an unbreakable plastic making it ideal for field and industrial applications.

•  3.5 mm Connector
•  Double Junction Reference
•  Spherical Glass Tip
Built-In Microchip
•  The built-in microchip stores sensor type, serial number and calibration information including date, time, offset, slope, probe condition and buffers used.
•  This information is automatically retrieved by edge^®once the electrode is plugged in.
•  The ability to transfer information allows for hot swapping of probes without having to recalibrate.
•  All pH measurements are performed within the electrode and transferred digitally to the meter.
•  This overcomes any noise issues associated with the traditional high impedance analog measuring system.
•  Electrical noise can be generated from a built in temperature sensor and while working in a humid environment.

  Spherical Glass Tip
•  The spherical shaped tip design allows for a wide area of contact with the sample.
•  This permits a faster electrode response with a higher degree of stability.
•  The tip uses a glass formulation that has a resistance of approximately 100 megaohms.
•  This means that measuring conditions are optimal around ambient temperatures.
•  Use of high or low temperature glass around ambient temperatures would not be optimal due to a long response time or a shortened lifespan of the electrode.

  Double Junction Reference
•  A double junction electrode has an internal compartment surrounding the reference wire.
•  Silver ions are present in the electrolyte of the internal compartment, which houses the Ag/AgCl reference wire; the electrolyte outside this compartment is silver free.
•  The double junction design means that virtually no silver from the electrode enters the sample.
•  This design allows measurement in applications where silver ions in the sample are undesirable or silver precipitates on the junction are likely to form.

  PEI Electrode Body
•  The PEI (polyetherimide) electrode body is suitable for a wide range of applications and excels in field measurements due to its durability.
•  The shielding around the spherical glass tip minimizes breakage due to accidental bumping or dropping of the electrode.
•  The PEI plastic is a high quality plastic that is chemically resistant to many harsh chemicals.

  Matching Pin
•  The HI12301 integrates a matching pin into the electrode and is part of the Hanna Instruments Sensor Check^™ feature.
•  The matching pin checks the impedance across the indicating and reference electrodes.
•  This allows the edge meter to alert the user in the event that the glass of the indicating pH electrode is cracked and the condition of the reference junction.

  Built-In Temperature Sensor
•  HI12301 features a built-in thermistor temperature sensor that is in the tip of the indicating pH electrode.
•  A thermistor temperature sensor provides for a high accuracy temperature reading and should be as close as possible to the indicating pH electrode in
order to compensate for the effect that temperature has on the membrane potential.
•  By having an accurate reading it is possible to provide an accurate temperature compensated reading.

     SPECIFICATIONS