Radar Level Measurement Solution for Grain Silos

A grain storage system manufacturer in the United States required a reliable level measurement solution for multiple silo projects. The application involved steel grain silos used for storing bulk agricultural materials including corn, wheat and other grains. Mainly 0-100 feet measuring range.

The customer needed continuous level monitoring in challenging conditions including heavy dust, frequent filling operations, outdoor installation and long-term unattended operation.

After technical evaluation, the customer selected Pokcenser PWL-R803 80GHz radar level sensors and purchased 50 units for deployment across grain silo projects in the United States.

Measurement Requirements

The grain silo application required:
• Accurate measurement of solid material level up to large silo heights.
• Reliable operation in high dust environments.
• Non-contact measurement to reduce maintenance.
• Resistance to dust accumulation during filling and discharge.
• Stable outdoor operation.
• Easy connection with PLC, SCADA and remote monitoring systems.
• Industrial communication through 4-20mA and RS485 Modbus.

Solución Pokcenser

Pokcenser provided the PWL-R803 80GHz FMCW radar level sensor with universal flange connection and air purging function.

The PWL-R803 is developed for solid applications such as grain, powder and bulk materials. FMCW radar technology provides reliable measurement without contact with the stored material. 3° narrow beam angle to reduce interference. Dust environment explosion proof Ex dD A21 IP68 T80℃ that capable to be used in the silos. Universal flange installation, that makes antenna able to be slightly offset by 20-30° to align the radar beam as perpendicularly as possible to the pile, thereby achieving the best possible signal measurement. Bluetooth APP for wireless setup and diagnostic.

Customer Benefits

Accurate Inventory Management
Continuous radar level measurement improves grain inventory visibility and reduces manual checking.

Reliable Performance in Dusty Conditions
Non-contact radar measurement avoids problems caused by material contact and mechanical wear.

Bajo mantenimiento
No moving parts reduce maintenance requirements and improve system availability.

Easy Integration
4-20mA, HART and RS485 Modbus outputs allow integration with existing automation systems.

Long-Term Value
Reliable measurement helps improve storage efficiency and reduce operational costs.

Products Used

Model: PWL-R803
80GHz Large Lens Antenna Radar Level Sensor with Universal Flange Blowing Function
Main Specifications:
• Frequency: 76GHz-81GHz FMCW radar
• Application: Strong dust, solids, powder and block materials
• Measuring range: 0 to 100 feet
• Accuracy: ±1mm
• Output: 4-20mA / HART / RS485 Modbus / Bluetooth
• Protection: IP67
• Installation: Universal flange DN80• Dust environment explosion proof Ex dD A21 IP68 T80℃