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Fail-Safe Dry Material Rotary Paddle Level Switches
115 Vac Rotary Paddle Level Switch for Hazardous Locations
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- Reliable Magnetic Technology (Patented)
- Twist On/Off Cover— No More Bolts!
- Wiring Access—2 Conduit Entrances
- Motor Shuts Off When Paddle is Impeded Significantly Extends Motor Life and Reduces Maintenance Costs
LVD-803-EXP Model Options
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*Highlighted options are not compatible. Please select a different combination.
Supply Power
Features
Media Type
Max Operating Pressure
Max Process Temperature
Wetted Materials
Process Connection Type
Process Connection Size
Switch Rating and Type
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, rugged and economical truly fail-safe rotary paddle point level control sensor of its kind.
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.
The rotation of the unit’s shaft is continuously monitored by detection of a magnetized rotating disk (patented). When the paddle is impeded by material, the shaft rotation stops. The motor rotates within the housing and magnetized sections of the motor mounting plate are detected (patented). Use of these magnetic sensing techniques eliminates problems that may occur with fouling of the optical systems used by other brands.
The built-in microcontroller performs self-diagnostics and monitors both shaft and motor mounting plate rotation. This allows the unit to easily distinguish between material presence and any electrical and mechanical failure of the unit. When material presence is detected, the SENSE relay changes state and the drive motor is deenergized to extend motor life. This output is available to control a process function or alarm circuit. When the material level drops, a tension spring returns the drive motor to its original running condition and is reactivated.
A unit failure is detected by sensing a lack of shaft rotation while material presence has not been detected by rotation of the motor mounting plate. In a failure condition the independent FAULT relay will change state indicating that an error condition exists. Monitoring the state of both the SENSE and FAULT relays provides the most flexibility for control and fail-safe monitoring.
The rugged and reliable design of the LVD-800 Series fail-safe bin monitor makes it the best choice for critical level control applications. The unit is compatible with many granular, pelletized and powder bulk applications. It can be utilized for high level indication of materials over 160 kg/m³ (10 lb/ft³) and for low and intermediate level indication for materials over 80 kg/m³ (5 lb/ft³). The LVD-800 Series bin level monitor can be installed almost anywhere dry bulk materials are stored including bins, hoppers, silos and tanks.
Please see the Material Characteristics Guide for assistance in determining the compatibility with the LVD-800 series.
SPECIFICATIONS
Power Requirements: 115 Vac (±15%); 9 VA; 50/60 Hz; 230 Vac (±15%); 9 VA; 50/60 Hz
Ambient Operating Temp: -40 to 65°C (-40 to 150°F)
Internal Bin Temp*:
Standard Unit: to 121°C (250°F)
Hi-Temp Unit: to 399°C (750°F)
Conduit Connection: Two (2) ¾ NPT
OUTPUTS
Material Sense: One SPDT; 5A @ 250 Vac, 30 Vdc max
Unit Status (Fault): One SPDT; 5A @ 250 Vac, 30 Vdc max
Maximum Pressure: 30 psi (2 bar)
Sensitivity: 80 kg/m³ (5 lb/ft³) minimum material density (when using large 3-vane paddle)
Indicators: Red and green high intensity LEDs indicate material sense and unit status conditions (Ordinary Location unit only)
Housing: Die cast aluminum, NEMA-4, IP66
Housing Finish: Powder coating
Mounting Connection: 1¼ NPT
Weight: Approx. 3.9 kg (8.5 lb)
MATERIALS OF CONSTRUCTION/ACCESSORIES
Flexible Couplings: 304 stainless steel
Mounting Plates: Carbon steel or 304 stainless steel
All Paddles Except Ex-Flex: 304 SS
Ex-Flex Belt: 304 SS coupling, rubber/fabric blend belt
Flexible Cable Extension: 304SS ¼' diameter
LISTINGS/APPROVALS
Hazardous Locations: Class I, Div. Groups C, D; Class II, Div. 1 & 2, Groups E, F, G, CE Mark
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.
The rotation of the unit’s shaft is continuously monitored by detection of a magnetized rotating disk (patented). When the paddle is impeded by material, the shaft rotation stops. The motor rotates within the housing and magnetized sections of the motor mounting plate are detected (patented). Use of these magnetic sensing techniques eliminates problems that may occur with fouling of the optical systems used by other brands.
The built-in microcontroller performs self-diagnostics and monitors both shaft and motor mounting plate rotation. This allows the unit to easily distinguish between material presence and any electrical and mechanical failure of the unit. When material presence is detected, the SENSE relay changes state and the drive motor is deenergized to extend motor life. This output is available to control a process function or alarm circuit. When the material level drops, a tension spring returns the drive motor to its original running condition and is reactivated.
A unit failure is detected by sensing a lack of shaft rotation while material presence has not been detected by rotation of the motor mounting plate. In a failure condition the independent FAULT relay will change state indicating that an error condition exists. Monitoring the state of both the SENSE and FAULT relays provides the most flexibility for control and fail-safe monitoring.
The rugged and reliable design of the LVD-800 Series fail-safe bin monitor makes it the best choice for critical level control applications. The unit is compatible with many granular, pelletized and powder bulk applications. It can be utilized for high level indication of materials over 160 kg/m³ (10 lb/ft³) and for low and intermediate level indication for materials over 80 kg/m³ (5 lb/ft³). The LVD-800 Series bin level monitor can be installed almost anywhere dry bulk materials are stored including bins, hoppers, silos and tanks.
Please see the Material Characteristics Guide for assistance in determining the compatibility with the LVD-800 series.
SPECIFICATIONS
Power Requirements: 115 Vac (±15%); 9 VA; 50/60 Hz; 230 Vac (±15%); 9 VA; 50/60 Hz
Ambient Operating Temp: -40 to 65°C (-40 to 150°F)
Internal Bin Temp*:
Standard Unit: to 121°C (250°F)
Hi-Temp Unit: to 399°C (750°F)
Conduit Connection: Two (2) ¾ NPT
OUTPUTS
Material Sense: One SPDT; 5A @ 250 Vac, 30 Vdc max
Unit Status (Fault): One SPDT; 5A @ 250 Vac, 30 Vdc max
Maximum Pressure: 30 psi (2 bar)
Sensitivity: 80 kg/m³ (5 lb/ft³) minimum material density (when using large 3-vane paddle)
Indicators: Red and green high intensity LEDs indicate material sense and unit status conditions (Ordinary Location unit only)
Housing: Die cast aluminum, NEMA-4, IP66
Housing Finish: Powder coating
Mounting Connection: 1¼ NPT
Weight: Approx. 3.9 kg (8.5 lb)
MATERIALS OF CONSTRUCTION/ACCESSORIES
Flexible Couplings: 304 stainless steel
Mounting Plates: Carbon steel or 304 stainless steel
All Paddles Except Ex-Flex: 304 SS
Ex-Flex Belt: 304 SS coupling, rubber/fabric blend belt
Flexible Cable Extension: 304SS ¼' diameter
LISTINGS/APPROVALS
Hazardous Locations: Class I, Div. Groups C, D; Class II, Div. 1 & 2, Groups E, F, G, CE Mark
Rated 4 out of
5
by
Gabe from
Reliable
We have these level indicators in place on our EPS silo bags, they have been working perfectly for a few years. Reliable and economical they are our go-to item for level sensors in our automated systems. My only complaint is the roll pin method of retaining the paddles, it can be difficult to remove and install inside of a bin or container when working through access ports.
Date published: 2017-05-08
Rated 5 out of
5
by
Mihai from
High quality
Very happy with my purchase, works very well, easy to install.
Date published: 2022-09-22
Do you offer replacement gear motors for the LVD-803 failsafe rotary paddle bin monitor? Part # 150-1591A?
Thank you for your inquiry! The motor assemblies are available for the LVD-803 units. The part number will vary depending on the voltage requirement. The correct part number can be found in the data sheet on the product page for the LVD-803 units.
Date published: 2022-02-23
Where can I find the material characteristics guide?
Thank you for your inquiry. We do not have a material characteristics guide but we do have different density ranges for each type of paddle. These ranges can be found in the spec sheet above. If this is not what you are looking for, feel free to e-mail us at flow@omega.com and our Flow Engineers can help you with what you are looking for.
Date published: 2020-07-10
Accessories
Flexible coupling spring flex for absorbing heavy loads, side loads and protect internal workings which extends the life of thepaddle
$57.00
1 In Stock
Flexible cable extension, 304SS, 1.98 m (78") (can be cut in field) eliminates the need for a mounting plate, extension guard and flexible coupling ($1.90 per additional Inch)
$236.96
0 In Stock
Mounting plate with 11/4 NPT heavy duty aluminum for flat surfaces or thin walled vessels where extra strength is required
$65.39
0 In Stock
Mounting plate with 11/4 NPT full coupling, stainless steel, for top mount installations where a shaft extension and shaft guards are required
$104.48
3 In Stock
