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Hanna HI-4109 Cyanide Combination ISE Electrode

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The HI-4109 is a solid state, combination ion selective electrode (ISE) for the determination of cyanide (CN-) in solution. Ideal for a variety of applications in plating, wastewater, and agriculture.

6 months warranty

£955.20 (exc.VAT)
£1,146.24 (tax incl.)
Full Description Specification

The HI-4109 is a Cyanide combination ISE. It is ideal to be used for the determination of free Cyanide ions in plating baths, waste water and in plant and soil samples.

The HI-4109 cyanide selective electrode is a complete potentiometric cell that contains a silver/silver chloride (Ag/AgCl) reference housed within a PEI plastic body with a potassium nitrate electrolyte. The internal elements are isolated from the sample by a compressed silver halide sensing membrane.


  • Solid state sensor
  • Skirted cone geometry
  • Detection from 0.026 to 260 mg/L CN-

Hanna’s solid state combination ISEs are designed with a cone style junction. The skirted cone geometry of the sensor forms the liquid junction with the test solution at the tip of the junction cone, producing a highly stable reference potential and consistent flow rates of electrolyte into the solution. A simple press of the top portion of the ISE makes it easy to empty the electrolyte fill solution and replace when necessary.

For the HI-4109 to measure cyanide accurately, it is important that the ionic strength of the standards and sample be adjusted to a high and constant value with the cyanide ionic strength adjuster (ISA) solution. The alkaline ISA ensures that the activity coefficient is constant so the concentration of free cyanide ions can be measured. Measuring all solutions with a constant ionic strength reduces the margin of error between measurements. The HI-4109 cyanide solid state ISE can measure from 1µM (0.026 mg/L) to 0.01M (260 mg/L).

BNC Connection – BNC is one of the most commonly used connector types in pH meters and electrodes. Compatible with any meter or electrode that uses BNC connectors.

Read More

TypeSolid-state; Combination
Measurement Range10-2M to 1X 10-6M 260 to 0.02 ppm
Optimum pH Range>11
Temperature Range0 to 80°C
Approximate Slope-57
Body O.D.12 mm
Insertion Length120 mm
Body MaterialPEI
Cable1m coaxial
Possible ApplicationsDetermination of free cyanide ions in plating baths, waste water and in plant and soil samples

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