May 31, 2021 Level Switch
The level switch can be electronic or mechanical, it serves only one purpose, which is to give us an alert if it detects the presence of the product. We can control the process in different ways. A continuous application has a transmitter sending online information to the control system. In a simple process, we might use a level switch to take action if we have 50 or 100 percent of the level.
A level switch signals the system whether the level of the measured substance is within expected parameters or not. If not, then the system will open a valve, start a pump, or take some other action to modify the level.
We can use a level switch as an extra layer of protection for sensitive equipment. If the level transmitter we are using as the first line of measurement fails, and the product goes beyond its proper level, then the level switch will alert the system.
Unscheduled problems can come upon any of your field devices, or even worst, the device can be measuring incorrectly and lead to an overfill in your tank. You need to have a plan B to avoid an overfill or any other possible problem, and level switches excel in this kind of application. In fact, it is used most of the time to protect other equipment.
There is a total of three types of level switch. The first type of level switch is the vibrating switch where it works based on the principle of tuning fork. Two prongs vibrating at their neutral frequency. When the product covers the prongs, the frequency drops. The device sends an alert of this change.
The second type of level switch is capacitance level switch where the same principle as continuous level measurement devices are used. The probe and tank walls act as the capacitor plates and the product as the dielectric. If the level reaches the sensor, then the capacitance changes and the sensor send its signal.
The last type of level switch is the float switch. The float switch is a mechanical level sensor for liquids and uses buoyancy to work. When the product reaches the float, the sensor alerts the system to stop the flow.
While the level transmitter is working without problems, the level switch will be there ready to take over control of the situation, avoiding an accident or loss of raw material. Furthermore, it adds another on/off control. The level switch can be a cheap and simple solution for your application.
Level Switch is available through Quick Time Engineering Inc.
Quick Time Engineering Inc is an international company with offices and distribution networks in the USA, Hong Kong, Europe and Malaysia.
In its 20 years of operation since 1998, Quick Time Engineering Inc had emerged from a local engineering company with a single staff that provided solutions in factory automation to become nowadays a company that serves the Oil & Gas industries, EPC contractors, System Integrators and other industrial automation and process control companies worldwide. Customers from over 50 countries worldwide trust us with their need for process control instruments and industrial automation products.
For more information about Quick Time Engineering Inc, visit www.quicktimeonline.com or email enquiry@quicktimeonline.com
