The LVD-803 and LVD-804 are part of the OMEGA Engineering LVD-800 Series of dry material rotary paddle level switches designed for reliable point level detection in various bulk materials. The LVD-803 operates at 115 Vac, while the LVD-804 operates at 230 Vac, both featuring a 1¬º NPT mounting connection. These switches utilize magnetic sensing technology to continuously monitor both material presence and operational status, ensuring fail-safe operation. The units are suitable for materials with a density of over 80 kg/m¬= (5 lb/ft¬=) for low and intermediate level indication and over 160 kg/m¬= (10 lb/ft¬=) for high-level indication. They can operate in ambient temperatures ranging from -40 to 65¬8C (-40 to 150¬8F) and can withstand internal bin temperatures up to 121¬8C (250¬8F) for standard models and 399¬8C (750¬8F) for high-temperature versions. The LVD-800 Series includes features such as a motor shut-off when the paddle is stalled, which extends motor life and reduces maintenance needs. The units are housed in a rugged die-cast aluminum enclosure rated NEMA-4 and IP66, making them suitable for harsh environments. Additionally, they provide SPDT outputs for material sensing and unit status, enhancing monitoring capabilities.
The LVD-800 Series fail-safe bin monitor is the state-of-the-art in rotary paddle technology. Utilizing magnetic sensing technology and a unique housing design, the LVD-800 Series fail-safe bin monitor is the most reliable, technician-friendly,
The LVD-800 Series fail-safe bin monitor provides the ultimate in performance wherever critical continuous operation must be ensured. Detection of both material presence and its own operational status is performed on a continuous basis. The LVD-800 Series fail-safe level sensor monitors its electrical and mechanical operating condition. This, in conjunction with separate outputs provided for material sense and unit status (fault conditions) makes this unit a "truly" fail-safe device.
While the LVD-800 Series fail-safe bin monitor is an evolution in rotary paddle technology, it continues to use tried-and-true operating techniques. Unlike many other available units, the LVD-800 Series incorporates a feature that automatically shuts off its motor when the paddle is in a stalled condition. This extends the life of the unit and minimizes maintenance.
Principle of Operation The operation of the LVD-800 Series rotary paddle fail-safe bin monitor uses magnetic sensing technology to detect both material presence and operational status of the unit. This method is simple and more reliable than that used by other manufacturers. The unit is installed through the wall of the vessel so that the paddle protrudes inside the vessel. A small electric motor drives the paddle, which rotates freely in the absence of material.
| OMEGA Engineering, Inc. | |
|---|---|
| Product Category | Level Sensors |
| Product Number | LVD-803 / LVD-804 |
| Product Name | Dry Material Rotary Paddle Level Switch |
| Device Classification | Sensor Only |
| Media Type | Dry material (Bulk solids and powders) |
| Level Measurement Type | Single Point or Multi-Point Level |
| Maximum Operating Pressure | 30 psi (21.11 m H2O) |
