Point Level Instrumentation
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Point level sensors are used to measure preset levels of liquid, slurry or solid media and transmit a signal when levels become too high or too low. When the media reaches the specified level, the signal transmitted by the point level switch triggers an alarm. In some applications, the sensors are also used to trigger pumps or supply valves to return the media to the preset level.
Various types of point level switches are used to monitor and control levels inside of containers, vessels, and holding ponds. Sensors are also frequently used to monitor levels of lakes, rivers and other natural bodies of water. Point level switches can be installed in a horizonal or vertical position and multiple sensors are often used to provide multi-stage point level measurement.
Point Level Measurement Sensors Provide Reliable Overflow Prevention
For applications that require simple, level control or alarms, Branom Instrument Co. stocks point level switches from some of the industry’s most trusted manufacturers. We offer floats, paddle switches, capacitance probes, vibrating tuning fork and more that can be used in conjunction with controls or alarms to prevent overflows and runouts in vessels of all sizes. Contact us regarding:
Capacitance Point Level Switches
Capacitance probe switches are rod-shaped sensors that provide point level measurement of liquids, slurries and pastes. Once installed, the sensors and vessel serve as the two electrodes that form a capacitor, and the media inside the vessel represents the dielectric. The radio frequency signals produced by the capacitance point level switch calculate changes in current that are then transmitted as an output signal.
Most capacitance point level switches are made of stainless steel and can withstand high temperatures and corrosive environments, making them ideal for use in chemical applications.
Mechanical Float Switches
Mechanical float switches are mechanically actuated float sensors used for point level measurement of corrosive and non-corrosive liquids and slurries. When fluid levels rise to a specified level, the mechanical float switch automatically triggers a pump that remains running until the fluid returns to the desired level.
The sensors are often installed at two different levels to prevent overflow in the event the first pump fails. Mechanical float switches are commonly used for point level measurement of sewage, wastewater and non-potable water.
Rotating Paddle Switches
Rotary paddle switches are constructed of a low speed motor with a paddle wheel and are used for point level measurement of dry bulk solids. They can be installed horizontally, vertically or at the base of vessel and can be used for single or multi-point level measurement.
The rotary paddle switch unit is operated by a self-powered motor and shaft that cause the paddle to continuously rotate. When a solid material contacts the paddle, it causes it to stop moving, which then triggers the sensor to indicate a specific level has been reached. As the silo or vessel empties, the paddle begins to rotate again. This type of point level switch is best for use with pelletized, granular and powdered media.
Ultrasonic level switches feature an electronic control unit and sensor and emit inaudible, high frequency ultrasonic waves to detect the absence or presence of media at a specified point. The sensors contain piezoelectric crystals that transmit and receive sound and then convert the sound into an electric signal that provides the point level measurement.
These sensors are highly versatile and are used for non-contact point level measurement of slurries, oils and liquids.
Vibrating Tuning Fork Switches
Vibrating tuning fork switches are point level switches designed based on the vibrating tuning fork principle. These instruments take point level measurement of solids and liquids and can be used in high static bulk powder environments.
To provide point level measurement readings, the vibrating tuning fork level switch is positioned inside a tank at a specified level. Voltage is then applied to the tuning fork to create a frequency that produces oscillations of the fork. When the vibrating tuning fork makes contact with a liquid or solid, the frequency changes. Full immersion into the media causes the frequency to significantly reduce. These changes are then read by the sensor and converted into switching signals that trigger a high- or low-level alarm.
Learn More About Our Inventory of Point Level Switches and More
We maintain a huge, in-stock inventory and offer startup, calibration, and maintenance services for all our point level control and monitoring equipment. Request a quote for your point level switches today or Contact us to learn more about point level measurement solutions.
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