Overview

HI1292D is a glass-body, refillable, single-junction pH electrode with a DIN connector. The electrode features a triple ceramic junction in the external reference cell, a conical pH sensing tip made of low-temperature glass, and a built-in amplifier and temperature sensor for automatic temperature compensation of pH readings. It is ideal for measuring the pH of soil and soil slurries and is designed for use with Hanna's HI99121 portable pH meter.

Key features

• Triple ceramic junction: three ceramic junctions contact the sample, giving an electrolyte flow rate of 40–50 µL/hr against 15–20 µL/hr for a typical single-junction electrode, providing greater continuity between the reference and indicating electrodes and faster, more stable readings.
• Low-temperature (LT) glass: the conical glass tip uses a special LT glass formulation with a resistance of about 50 MΩ (general purpose GP glass is about 100 MΩ); resistance rises less in cold samples, making it suitable for samples from −5 to 70 °C.
• Conical bulb: the tapered tip penetrates solids, semi-solids and emulsions, making the HI1292D ideal for direct pH measurement of soil and soil slurries.
• Built-in temperature sensor: automatic temperature compensation with no separate temperature probe required.
• Refillable: the filling solution is HI7071M (3.5M KCl + AgCl). Removing the fill cap before calibration and measurement creates a positive head pressure that increases electrolyte flow and gives faster, more stable readings.
• DIN connector: connects directly to the HI99121 portable pH/temperature meter for direct pH measurement in soil.

Benefits of the glass body

The glass body resists many aggressive chemicals and is easy to clean, and it allows heat to transfer quickly to the internal reference electrolyte. The mV produced by the reference cell is temperature dependent — the faster equilibrium is reached, the more stable the reference potential.

Please note

• Hanna offers a wide range of pH electrodes; glass type, bulb shape, body material, junction type, reference type and electrolyte all differ and should be selected according to the application.
• *Products classified as dangerous goods can only be shipped by ground transport.

Specifications

• SKU: HI1292D
• Reference: single junction, Ag/AgCl
• Junction / flow rate: ceramic, single junction / 15–20 µL·hr⁻¹
• Electrolyte: 3.5M KCl + AgCl
• Range: pH 0 to 12
• Filling solution: HI7071M (3.5M KCl + AgCl)
• Compatible meter: HI99121 portable pH/temperature meter
• Sample temperature: −5 to 70 °C