This particular article focuses
on Level switches, what are they? How are they used? And what are they
used for precisely?
A Levelpro Level Switch can
simply be defined in simple words as an electromechanical device that opens up
and/or closes a digital switch when a particular fluid in a given area reaches
a certain prescribed level.
Types of Switches:
There are many subcategories of Levelpro level
switches, each having a slightly different purpose than the other. Some of
the types of Levelpro level switches are the following:
- Capacitive
- Conductive
- Displacer
- Float
- Optical
- Paddle
- Tilt
1. FlowlineCapacitive switch:
With electrodes attached in the
front side of the special capacitive liquid present in the sensor which helps
in detecting changes in the switch as the special fluid comes closer to the top
of the sensor. Once the point is reached, the level in the switch creates the
output. Since these switches are adjustable, they can also be used to sense
aqueous and non-aqueous liquids, regardless of what color they possess.
- FlowlineConductive Switch:
The conductive level switches consist of various
sensors used in conductive liquids and fluids; the sensor detects the
resistance of the liquid. The AC Currents that flow through is then measured
by the equipment provided in the switch and is then converted into a
corresponding switching signal. The received signal is then determined by the
mounting position or the length of the probe.
- FlowlineFloat Switch:
This switch consists of a magnet
which helps it to latch onto any object. A switch motion is placed inside an
enclosure across the pressure tube. Vertical movement is achieved when the
pressure tube inside the device simultaneously activates the secondary magnets
in the switch to activate and operate the contacts.
- Displacer switch :
A displacer level switch pretty much functions the same way as the float
switch, but it only differs from the float switch in a way that it does not possess
the ability to float whereas a float switch, given its name, can
float.
- FlowlineOptical switch
The optical switch usually
contains an infrared light and a receiver. Light emitted from the LED is sent
into a prism, which forms the tip of the given sensor. The light emitted from
the LED is reflected from inside the prism to the receiver. This activates the
switching within the unit to start the operational procedures on the control
circuit.
6. Truflo Paddle Switch
For a paddle switch, a small
compartment unit is located at the top, middle, and or lower level of it. In
between operations, a special synchronous motor rotates the given paddle. When
rotation takes place the motor will slow down and prompt a micro switch to
change its state to indicate an alarm or a control condition to signal the end
of an operation.
- Tilt Switch
This switch is suspended over a
control point using a wire, as the liquid rises, the switch tips and prompts a
ball inside the unit to change its position. When tilted at a particular angle,
it activates a microswitch and causes an alarm condition.
