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Flow Detection from BinMaster
How it works
The Flow Detect 2000 emits a low power microwave signal toward the material being monitored. Part of this signal is reflected off the material back to the antenna. This reflected signal combines with the emitted signal to produce a beat frequency, which is the difference in frequency between the two signals.
If the material being monitored is not moving, the reflected signal will be the same frequency as the emitted signal and there will be no beat frequency produced. However, if the material is moving, the reflected signal will be shifted in frequency and a difference or beat frequency will be produced. This shift in frequency is called the Doppler effect. The presence or absence of this beat frequency is sensed by the FD 2000 to detect a flow or no flow condition.
Why you need it
By ensuring flow has stopped before a new material is introduced into the flow stream you can prevent cross contamination and avoid product waste and improper batching.
Common uses of Flow Detect.
Feed ingredients: For example, feed additives for cattle can be dangerous to horses. If you are producing feed for a variety of species, Flow Detect ensures one ingredient has stopped flowing into the process before switching to another.
Grain distributors: Move grain efficiently where it needs to go at multi-bin facilities. Flow Detect will let you know that flow has completely stopped before switching to fill another bin.
Batching concrete: Getting the proper volume is essential to making quality concrete. Flow Detect will alert when material stops or starts flowing into the batching process.
Comes in handy in these applications:
- Flow/no flow detection to prevent cross contamination of ingredients
- As a preventive control for FSMA, USDA, or FDA compliance
- Ensuring solids, granules, pellets, meals, and powdered materials flow properly
- Installed in distributors, gravity chutes, feeders, pipelines, conveyor belts, or bucket elevators
- Many industries, including feed, grain, milling, food, cement, mining, power, and plastics
- In hazardous locations where there is the threat of combustible dust
What’s neat about this sensor
- Single-piece design eliminates separate controller
- Detects solids, granules, pellets, meals & powders
- Low power microwave Doppler technology
- No contact with the material flow stream
- Installs quickly & easily in a 1-1/4” NPT filling
- Non-intrusive flush mounting senses flow through non-metallic surfaces
- Optional saddle style pipe mount kit available
- Ideal replacement for mechanical switches
- Hazardous location approvals available
Monitoring backup
Manifold/Diverter
Determining flow/no-flow from a chute
Confirming flow from a silo
Flow Detect Specifications
| Power Requirement | 2 Watt at 24 VDC +/-10% |
| Detection Range | 1.5 m (4.9 ft.) |
| Sensitivity Adjustment | High / low selection switch with potentiometer |
| Relay Outputs | 250 VAC / 220 VDC / 2A (N.C. or N.O.) |
| Output Delay Range | Switchable from 0.1 to 3.1 seconds / 2.3 to 15.1 seconds |
| Fault Conditions | Doppler sensor failure and excessive temperature |
| 4-20 mA Output | No Flow: 4 mA +/-4% |
| Flow: 20 mA +/-4% | |
| Fault: 22 mA +/-4% | |
| 4-20 mA Load | 650 Ohms Maximum |
| Operating Temperature | -22°F to 140°F (-30°C to 60°C) |
| Storage Temperature | -40°F to 176°F (-40°C to 80°C) |
| Emissions | 24.11 GHz, 6.6 mW typical / 9.9 mW maximum |
| Enclosure | White Powder Coated Aluminum, NEMA 4X |
| Mounting | 1-1/4” NPT |
| Conduit Entry | 3/4” NPT |
| Process Pressure | 80 PSI |
| Approvals | North American Class II, Division 1, Group E, F & G and ATEX Zone 21 |
