SKU
HI4104

Calcium Combination Ion Selective Electrode (ISE) - HI4104

€849.75
In stock
The HI4104 is a liquid membrane, calcium combination ion selective electrode (ISE) for the determination of calcium (Ca2 ) in solution. The PVC membrane comprised with organic ion exchanger produces a potential change due to the calcium ion exchange between the organic polymer membrane and the sample. The internal sensing elements are housed within a durable polyetherimide (PEI) body.  The HI4104 is ideal for a variety of applications in the food and beverage industry and water analysis.
  • Liquid membrane sensor
  • Skirted cone geometry
  • Detection from 0.12 to 40,080 mg/L Ca2

 

The HI4104 calcium ion-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 chloride electrolyte. The internal elements are isolated from the sample by an organic polymer sensing membrane.
Hanna’s liquid membrane 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 HI4104 to measure calcium accurately, it is important that the ionic strength of the standards and sample be adjusted to a high and constant value with the calcium ionic strength adjuster (ISA) solution. The ISA ensures that the activity coefficient is constant so the concentration of free calcium ions can be measured. Measuring all solutions with a constant ionic strength reduces the margin of error between measurements. The HI4104 calcium liquid membrane ISE can measure from 3µM (0.12 mg/L) to 1M (40,080 mg/L).

Conversion Table for Ca2

  Multiply

moles/L (M) to ppm (mg/L)

40080

ppm (mg/L) to M (moles/L)

2.49 10-5

 

Features at-a-glance

Replaceable Sensing Modules

  • Combination liquid membrane ISEs are electrodes that detect free ions in a solution. This type of ISE is designed to incorporate easy replacement of the sensing module.

Durable PEI Body

  • The probe body is composed of durable polyetherimide (PEI) plastic.

BNC Connection

  • The HI4104 has a universal BNC connector for easy connection to any benchtop meter with a female BNC probe input.
 

Theory of Operation

A liquid membrane ion selective electrode develops a voltage due to the ion exchange that occurs between the solution and the polymer membrane that contains organic ion exchange resin. When the ionic strength of the solution is fixed by the addition of ISA, the voltage is proportional to the concentration of free ions in solution.

Specifications

Specification Name Detail
SKU HI4104
Type polymer membrane; combination
Optimum pH Range 4 to 10
Temperature Range 0 to 40°C
Diameter 12 mm
Length 120 mm
Body Material PEI/PVC
Cable 1 m coaxial
Common Applications determination of free calcium in beverages, water, and seawater
Connection BNC
Warranty 6 months
All prices are VAT excluded and without shipping costs, unless otherwise stated. Hanna Service d.o.o. — Sermin 75H, Bertoki — 6000 Koper (Slovenia) — VAT ID SI92346669 ©2021 All rights reserved