Flow switches are particularly useful for pump protection or to activate flow or no-flow alarms. The DFS 5.1 Doppler Flow Switch is designed to give basic process control for pipe flow measurement, recommended for difficult liquids including wastewater, cooling water, slurries, sludge, chemicals, viscous liquids, and abrasives that would usually damage contacting Doppler flow switches. The non-contacting ultrasonic sensor mounts to the outside of metal or plastic pipes, without the need to cut the pipe or shut down the flow of your process, increasing your efficiency and ultimate profitability. With no maintenance required for the Doppler flow switch, it works on any pipe diameter 12.5 mm (0.5 in) or larger and installs in just minutes.
The relays in the DFS 5.1 can be set to turn ON and OFF at any flow rate between 0.075 m/s to 3 m/s (0.25 ft/s and 9.8 ft/s) in addition, the end-user could inset two links for separate ON/OFF set points or just one link for a high or low flow alarm.
For more information on the Doppler Flow Switch 5.1, see the downloads tab below.
- Flow Control from the Outside of Metal or Plastic Pipes
- 5 A DPDT Control Relay
- Adjustable ON/OFF Set-Points
- High or Low Flow Alarm Mode
- Adjustable Time Delay
- Relay Status LED
- Flow Rate LED bar graph
| General Specifications | |
|---|---|
| Spec name: | Description: |
| Enclosure | NEMA4X (IP 67) polycarbonate with a clear shatter-proof face |
| Power Input | 100-240 V AC 50/60 Hz (±10%), 2 W |
| Control Relay | 5 A DPDT |
| Set Points | ON/OFF adjustment from 0.075 m/s to 3 m/s (0.25 ft/s to 10 ft/s) |
| Pipe Size | Any pipe ID from 12.7 mm to 4.6 m (0.5 in to 15 ft) |
| Operating Temperature (Electronics) | -23 °C to 60 °C (-10 °F to 140 °F) |
| Accuracy | ±2%, requires solids or bubbles minimum size of 100 microns, minimum concentration 75 ppm. Repeatability: ±0.1% |
| Shipping Weight | 3.6 kg (8 lbs) |
| Sensor Specifications | |
|---|---|
| Spec name: | Description: |
| Model | Single-head ultrasonic with 6 m (20 ft) shielded cable |
| Operating Temperature (Sensor) | -40 °C to 150 °C (-40 °F to 300 °F) |
| Options | |
|---|---|
| Options: | Description: |
| Sensor cable | up to 150 m (500 ft) shielded coaxial pair with cable junction box |
| Sensor mounting clamp | stainless steel, adjustable |
| Power input | 12-24 V DC (±10%), 3 W Max |
| Product Brochure | Download |
| Datasheet | Download |
| Order Form | Download |
| Installation & Instruction Manual | Download |
| Engineering Specifications | Download |
| Pulsar Logger v3.0.0 Software (Formerly Greyline Logger) | Download |
| Software Brochure | Download |
| The limestone slurry is abrasive so in-line flowmeters are not practical. Non-contacting Doppler flowmeters can be used both on the fly ash slurry supply lines and on "used" or recirculated slurry. | Download |
| Datasheet | Download |
| Datasheet | Download |
| Datasheet | Download |
| Pulsar Measurement Product Warranty | Download |
Request a Quote
Quick form, fast quote — within 1 business day.
Product Works with
Product Configurator
The Pulsar Measurement product configurator allows you to select the applications specific to you and discover the most appropriate solutions for your requirements.
