Dry Material Level Switch  

Accurate level monitoring is crucial in industrial processes where dry bulk materials such as pellets, seeds, sand, or granules are handled. A well-established solution for this is the dry material level switch, like the membrane level guards from Elniva – robust, dependable, and designed for both high- and low-level alarms in silos, containers, conveyors, and processing systems. 

What is a Dry Material Level Switch? 

A dry material level switch is a sensor designed to detect when dry bulk material reaches a certain level in a container. It typically operates via a diaphragm mechanism where the pressure of the material actuates a membrane, which in turn activates a microswitch. These level switches are ideal for overflow protection or for alerting when material levels are low. 

Elniva – Experts in Membrane Level Guards 

The Elniva series from Level Switch Sweden AB offers diaphragm-based level guards engineered to handle all types of granular and powdery products, from light dust to heavy materials like grains, pellets, coal, or sand. These devices are designed for remote monitoring and can be mounted either inside or outside containers, depending on the application. 

Function and Benefits 

Elniva’s level guards work as mechanically actuated membrane switches. 
When the material in the container presses against the rubber diaphragm, it deflects toward a pressure plate and actuates a microswitch. The diaphragm’s movement is limited to around 3–4 mm, ensuring the internal components are protected from excessive load. 

The guards also feature pressure compensation. A sintered bronze filter cartridge equalizes air pressure changes behind the diaphragm. For installations inside containers, a compensation membrane replaces the filter to maintain internal stability. Note: These devices are not suitable for pressurized vessels. 

Product Overview – Elniva Series 

NV 14P – For Heavier Materials 

This model is well suited for high-reliability level monitoring in silos or large bins storing heavy dry materials. 

NV 14P-KM – With Compensation Membrane 

NV 10P – Compact Overflow Protection 

Easy Installation and Durable Design 

All Elniva level switches are constructed using pressure-cast metal housing, nickel-plated brass components, and an oil-resistant nitrile rubber membrane. The rugged design, combined with standard cable glands and mounting options, makes installation simple and integration seamless. 

Summary – Key Advantages of Elniva Dry Material Level Switches