20 Solutions for Water & Industry The current path is defined by the sensor geometry, or cell constant, which has units of 1/cm (length/area). < From ultrapure water to high concentrated process media < Cost-efficient for water / wastewater applications < Conductive sensors for maintenance free applications The conductive principle sees an alternating current applied between sensor poles and the resulting current, dependent on the concentration of ions and on the length and area of the solution through which the current flows, is measured. EC The measure of this voltage and the cell constant give the right value of conductivity of the fluid. < From ultrapure water to high concentrated process media < Cost-efficient for water / wastewater applications < Inductive sensors for maintenance free applications The inductive principle sees the field coil of the sensor stimulated by a sinusoidal voltage. The current field in the fluid, that depends on its conductivity, generates a voltage in the receiver coil of the sensor. IC The substrate reacts by emitting initially a red light (luminescence), then returns to its initial state. The intensity of the produced red light and the return rate to the initial state are related to the present oxygen concentration. < Innovative method gives accurate measurements over time, eliminating system calibration < Maintenance required only every 2 years < Suitable for variety of applications including where measuring liquid is almost stationary Oxygen measuring sensor comes with an integrated temperature probe. The measuring technique is based on the following optical principle: a diode emits a blue light towards a support on which a fluorescent substrate is applied. OX