Calcium Half-Cell Ion Selective Electrode (ISE) - HI4004
The HI4004 is a liquid membrane, half-cell 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 epoxy body. The HI4004 is ideal for a variety of applications in the food and beverage industry and water analysis.
- Liquid membrane sensor
- Detection from 0.12 to 40,080 mg/L Ca2+
- For use with HI5315 reference half-cell
The HI4004 calcium ion selective electrode is a potentiometric half-cell sensor housed within an epoxy body. The internal elements are isolated from the sample by an organic polymer sensing PVC membrane. This liquid membrane sensor requires a separate reference electrode to complete the measurement system.
moles/L (M) to ppm (mg/L)
ppm (mg/L) to M (moles/L)
2.49 x 10-5
Replaceable Sensing ModulesHalf-cell liquid membrane ISEs are electrodes that detect free ions in a solution. The HI4004 calcium half-cell ISE is designed to incorporate easy replacement of the sensing module.
Durable Epoxy BodyThe probe body of the calcium half-cell ISE is composed of durable epoxy resin.
BNC ConnectionThe HI4004 has a universal BNC connector for easy connection to any benchtop meter with a female BNC probe input.
Theory of OperationA 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.
|Type||polymer membrane; half cell|
|Measurement Range||1M to 3•10-6M 40080 to 0.12 mg/L (ppm)|
|Optimum pH Range||4 to 10|
|Temperature Range||0 to 40°C|
|Cable||1 m coaxial|
|Common Applications||determination of free calcium in beverages, water, and seawater|