Product Introduction
The VEGA WEIGHTRAC 31 is a radiometric sensor for continuous mass flow measurement of bulk solids. It measures the attenuation of gamma radiation as material passes through the measuring frame, allowing throughput to be determined without mechanical contact with the product. It is designed for conveyor belts and screw conveyors across a wide range of industrial applications.
Key Features
- Non-contact radiometric measurement for bulk-solids throughput monitoring.
- Published accuracy of 1% for suitable applications.
- Frame-based design for installation on conveyor systems, including retrofit applications.
- Wear-free measurement principle with no direct contact with the conveyed material.
- PVT scintillation detector for radiation measurement.
- Multiple output options, including four-wire 4–20 mA/HART, PROFIBUS PA, and FOUNDATION Fieldbus, depending on version.
- IP66/IP67 protection for industrial environments.
- Aluminium or stainless steel housing, depending on configuration.
Applications
- Mass flow measurement on conveyor belts
- Throughput monitoring in screw conveyors
- Cement and building-material production
- Mining and mineral processing
- Coal handling and power generation
- Bulk-material processing and transport
- Industrial production lines requiring continuous material-flow measurement
Technical Highlights and Selection Considerations
The WEIGHTRAC 31 has a published ambient temperature range of -40 to +60 °C, with extended ranges potentially available for selected configurations. The detector's measuring range depends on the selected setup and is specified as a distance range rather than a universal mass-flow range.
When selecting the sensor, consider conveyor width and geometry, material characteristics, throughput range, installation space, required signal output, and local radiation-safety regulations. Because this is a radiometric instrument, installation and use must follow applicable licensing, radiation-protection, and site-safety requirements.
Frequently Asked Questions
1. What is the VEGA WEIGHTRAC 31 used for?
It measures the mass flow of bulk solids moving on conveyor belts or through screw conveyors.
2. How does the WEIGHTRAC 31 measure material flow?
It measures the attenuation of gamma radiation as material passes through the measuring frame. The signal is used to determine the amount of material being conveyed.
3. Does the WEIGHTRAC 31 contact the material?
No. It measures through radiometric technology, so the detector does not need to contact the conveyed material.
4. Which output signals are available?
Depending on the selected version, outputs include 4–20 mA/HART, PROFIBUS PA, and FOUNDATION Fieldbus. Confirm the required interface before ordering.
5. Can it be installed on an existing conveyor belt?
Yes. Its frame construction is designed to support retrofit installation, subject to available space and the conveyor's mechanical arrangement.
6. Are special safety requirements needed?
Yes. Radiometric equipment uses a radioactive source as part of the measurement system. Applicable radiation-safety requirements, approvals, and installation procedures must be observed.
