Working Principle of Diaphragm Level Switch​

Diaphragm Level Switch

Diaphragm level switch is sensor with an electrical contact output. When material in the bin exceeds the level of the diaphragm level switch, a sensitive micro-switch is activated. It sends an alert that can be utilised to initiate or halt a process or alarm in the vessel. Diaphragm Level Switch are frequently utilised in grains, feed, seeds, and other granular materials. Applications include mining, silos, hoppers, and food & beverage.

Diaphram level switch

Working Principle Diaphragm Level Switch: 

“One of the limit switches inside the switch chamber is activated by the product’s pressure on the membrane(Diaphragm). The limit switch’s contact is utilised to initiate control action.”

The Diaphragm Type Level Switch is a level switch detecting an object to be measured, through utilizing the pressure change affected by level rise and fall in a pipe. As level rises, air pressure inside a pipe gets higher. When the measuring face of diaphragm falls under the air pressure, the diaphragm presses a micro switch, thus turning it on. In turn, as the level descends and the air pressure inside the detection pipe gets lower, the output contact will return to the initial condition.

Diaphragm level switch principle

Application of Diaphragm Type Level Switch

For noticing material on the screw conveyor is clogged.
To detection of the bucket elevator’s boot level.
For checking the amount of food grain in the hopper.
For bulk goods, level detection.
To detects bin overflow and keeps the material level at a certain level.

Advantages of Diaphragm Type Level Switch

Point Level switch.
Cheap but dependable
No power source is necessary.
It’s easy to install.
Non-intrusive flush mount
ideal for situations when vessel size, internal clearance, or protrusion into a vessel are restricted.
It provides Screw conveyor over-pressure protection.

Read Also:-

Pressure Gauge Calibration.

DP Transmitter Calibration

Remote seal DP transmitter Calibration 

Pressure Switch Calibration

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