Calcium Half-Cell Ion Selective Electrode (ISE) - HI4004
- 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|