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Sales: (03) 9769 0666   |    Mon to Fri: 8:30am – 5:00pm
Hanna Instruments Australia
Sales: (03) 9769 0666   |    Mon to Fri: 8:30am – 5:00pm

pH Electrode with Clogging Prevention System (CPS™) and DIN Connector - HI1048D

$522.94


Prices include GST. Not all items are in stock. Call 03 9769 0666 to confirm.

The HI1048D is a glass body, refillable, open junction pH electrode with a DIN connector that is supplied with the HI99111. This electrode features a double junction reference, Hanna’s Clogging Prevention System (CPS™) technology and spherical glass sensing bulb made with general purpose glass.

This pH electrode is ideal for wine must and juice due to their high solids content that would clog a standard general purpose pH electrode. The HI1048D is a pre-amplified electrode that has a built-in temperature sensor for temperature compensated measurements in a single probe design.

  • Clogging Prevention System (CPS™) Technology
  • Built-In Temperature Sensor
  • Double Junction Design

Description

Hanna Instruments offers a wide variety of pH electrodes that are designed for many different applications. The type of glass used for sensing pH, bulb shape, body material, type of junction, type of reference and electrolyte used are just some of the design considerations.

The HI1048D uses general purpose (GP) glass, spherical bulb, glass body, sleeve junction with CPS technology, double junction and is refillable with 3.5M KCl making it ideal for wine must, juice, and other samples with a high solids content.

 

GP Glass Formulation

General Purpose Glass Formulation

General purpose glass as the name implies is a standard glass formulation that is used for general use. A pH electrode with general purpose (GP) glass will have a resistance of 100 megaohms at 25℃ and is suited for measuring pH of samples that are at ambient temperatures. The HI1048D is suitable to use with samples that measure from 0 to 80℃.

 

Spherical Glass Tip

Spherical Glass Tip

The spherical shaped tip design allows for a wide area of contact with the measured sample. This permits a faster electrode response with a higher degree of stability.

CPS Sleeve Junction

CPS Sleeve Junction

Clogging Prevention System (CPS™) technology is an innovation for the improvement of pH measurements in samples that have a high solids content. Conventional pH electrodes use ceramic junctions that can clog quickly when used in samples that have a high solids content such as wine must or juice. When the junction is clogged, the electrode does not function. The CPS technology utilizes the porousness of ground glass coupled with a PTFE sleeve to prevent clogging of the junction. The ground glass allows proper flow of the liquid, while the PTFE sleeve repels solids. As a result, pH electrodes with CPS technology take up to 20 times longer to be fouled as compared to conventional electrodes.

 

Double Junction Reference

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 for samples that contains sulfides that can cause the silver to precipitate and clog the junction. Clogging of the junction will result in drifty and erratic readings.

 

Refillable

Refillable

The HI1048D is a refillable probe. Since it is a double junction pH electrode the fill solution is the HI7082 3.5M KCl. This solution does not contain any silver as with single junction electrode.

 

Glass Body

Glass Electrode Body

he glass body is ideal for laboratory use. The glass is resistant to many harsh chemicals and is easily cleaned. The glass body also allow for a fast transfer of heat to the internal reference electrolyte. The mV generated by the reference cell is temperature dependent. The faster the equilibrium the steadier the reference potential.

 

din connector

DIN Connector

The HI1048D has a DIN connector. This type of connector is proprietary to the meter it is to be used with. The HI1048D is the replacement electrode for the HI99111. Other type of connectors include BNC, screw type, T-type, and 3.5mm.

 

Single Junction Versus Double Junction pH Electrodes

Single junction vs. double junction electrodes

Conventional electrodes are normally single junction. As depicted by the figure above, these electrodes have only a single junction between the internal refernce wire and the external solution. Under adverse conditions, such as high pressure, high temperature, highly acidic or alkaline solutions, the positive flow of the electrolyte through the junction is often reversed resulting in the ingress of sample solution into the reference compartment. If this is left unchecked, the reference electrode can become contaminated, leading to complete electrode failure. Another potential problem with single junction electrodes is the clogging of the junction due to silver chloride (AgCl) precipitation. Silver can be easily precipitate in samples that contain Tris buffer or heavy metals. When the electrolyte solution makes contact with the sample, some AgCl will precipitate on the external face of the junction. The result is drifty readings obtained from the sensor.

Hanna’s double junction system, as the name implies, has two junctions, only one of which is in contact with the sample as shown in the figure. Under adverse conditions, the same tendency of sample ingress is evident. However, as the reference electrode system is separated physically from the intermediate electrolyte area, the contamination of the electrode is minimized. The likelihood of clogging of the junction is also reduced with a double junction electrode since the outer reference cell uses a fill solution that is “silver-free”. Since there is no silver present, there is no precipitate forming to clog the junction.

SKU HI1048D
Name pH Electrode with Clogging Prevention System (CPS™) and DIN Connector - HI1048D
Measurement Range pH: 0 to 12
Reference Cell Type double, Ag/AgCl
Junction Type/Flow Rate open, CPS technology
Refill Electrolyte 3.5M KCl
Body Material glass
Tip / Shape dome (dia: 8 mm)
Matching Pin no
Max. Pressure 0.1 bar
Temperature Operating Range 0 to 80°C (32 to 176°F) - GP
Body Length/Overall Length 120 mm / 175.5 mm
Temperature Sensor yes
Outer Diameter 12 mm
Cable 7-pole; 1 m (3.3 in.)
Connector Type DIN
Amplifier yes
Recommended Use juice, must, wine

All prices are inclusive of GST and not all items are stock items, if you require an immediate solution please send an email to sales@hannainst.com.au or call us on (03) 9769 0666.

Free standard delivery: We offer free delivery within Australia on orders over $100, typically arriving within 5 to 7 days. Delivery times may vary depending on the courier service and the recipient's location. Free shipping is not available with other offers or discounts.

Same-day despatch: Place your order before 1 PM Monday to Friday for same-day despatch. Delivery times may vary depending on the courier service and the recipient's location. Subject to stock availability.

Please note that we do not offer shipping to PO Box addresses.

Additional information

Weight 0.44 kg
Parameter

pH