Madison's continuous level indicators are vertical mount sensors ideal for monitoring liquid height. These sensors provide tank level indication and control through the available resistive, current or voltage outputs. Connect the sensor output to a process meter to control pumps, valves, alarms or other devices. These magnet float and reed switch based sensors are rugged, reliable and available in a wide variety of configurations. They are available in various materials, mounting configurations, resolutions and output types. Standard models are customizable using our product configurator or contact Madison for your custom sensor needs.
A magnet-containing float travels the length of the sensing range and interacts with a reed switch/resistor network. The reed switch/resistor network consists of evenly distributed reed switches over the sensing length and corresponding resistors to achieve the desired output resolution. Reed switches magnetically actuate as the float moves with the liquid level. Apply DC power and connect the output signal to process meters, programmable controllers, microprocessors or other readout devices.
Madison offers sensors to meet a wide variety of applications or budgets.
High Accuracy: Model C4651 (1/4" resolution) sensor offers high-resolution for accurate liquid height measurement and control
Madison's Continuous Float Level Transducers are often designed with a specially weighted float to "ride" on the interface between two liquids with different specific gravities. The most common tank application is for oil-water separation.
By 'weighting' the density / specific gravity of the float, Madison Comapny can provide a float that sinks through a lower density material (like oil), while remaining buoyant on the higher density fluid below (like water). By monitoring the interface of the two dissimilar fluids ,like in an Oil/Water separator, Waters or oils can be safely pumped away. The weighted float principle remains one of the most direct, reliable and economical means of sensing liquid interfaces like chemical emulsions, slurries and other layered liquids.