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Flat Tip pH Electrode for Skin and Surfaces with BNC Connector – HI1413B/50

The HI1413B/50 is a glass body, single reference junction pH electrode made with low temperature glass and a BNC connector. This electrode has a unique open junction design in which there is a viscolene (hard gel) electrolyte layer that is free of silver chloride (AgCl) between the sample to be measured and the internal reference cell. The open junction design resists clogging and the probe’s flat tip makes it ideal for pH measurements on surfaces such as skin, leather, agar plates, and paper.

  • Open Junction
  • Flat Tip
  • Viscolene Gel Electrolyte


Low-Temperature Glass Formulation

The glass tip uses a special Low-Temperature (LT) glass formulation with a lower resistance of approximately 50 megaohms compared to general-purpose (GP) with a resistance of about 100 megaohms. The HI1413B/50 is suitable to use with samples that measure from 0 to 50℃.

Flat Glass Tip

A flat tip is recommended to optimize surface contact for measurement on the skin, leather, agar plates, paper, and samples that cannot easily be penetrated.

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.

Open Junction Reference

Suspended solids and proteins found in food products will clog a conventional ceramic reference junction. This clogging will impede the measurement circuit between the indicating electrode and the internal reference resulting in slower response time, erratic readings, and frequent electrode replacement.

The open junction design consists of a solid gel interface (viscolene) between the sample and internal Ag/AgCl reference. This interface not only prevents silver from entering the sample, but also makes it impermeable to clogging, resulting in a fast response and stable readings.

BNC Connector

The HI1413B/50 uses a BNC connector. This type of connector is universal in that it can be used on any pH meter that has the female BNC probe input.

Additional information

Weight 0.45 kg


Temperature Range

0 to 50°C (32 to 122°F) – LT


SKU HI1413B/50
Name Flat Tip pH Electrode for Skin and Surfaces with BNC Connector – HI1413B/50
Description pH electrode
Measurement Range pH: 0 to 12
Temperature Range 0 to 50°C (32 to 122°F) – LT
Reference Cell Type single, Ag/AgCl
Junction Type/Flow Rate open
Type of Electrolyte viscolene
Body Material glass
Tip / Shape flat
Max. Pressure 0.1 bar
Temperature Sensor yes
Cable coaxial
Connector Type BNC
Amplifier yes
Recommended Use skin, scalp, emulsions, leather, paper, surface


Flat Tip pH Electrode for Skin and Surfaces with BNC Connector – HI1413B/50