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Greyline Instruments DFS 5.1 Doppler Flow Switch Standard, 100-240VAC 50/60Hz 100 ft. continuous shielded coaxial pair

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$1,969⁵⁰

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Sort by Price	Sort by Availability	Sort by CODE	Sort by Sensor Cable Length	Sort by Power Input
$2,177⁵⁰	In stock + −	DFS 5.1B-1-C	Sensor Cable Length: 100 ft. continuous shielded coaxial pair	Power Input: 12 to 24VDC
$1,891⁵⁰	In stock + −	DFS 5.1B-1-A	Sensor Cable Length: 20 ft. shielded coaxial cable	Power Input: 12 to 24VDC
$1,996⁸⁰	In stock + −	DFS 5.1B-1-B	Sensor Cable Length: 50 ft. continuous shielded coaxial pair	Power Input: 12 to 24VDC
$1,969⁵⁰	In stock + −	DFS 5.1A-1-C	Sensor Cable Length: 100 ft. continuous shielded coaxial pair	Power Input: Standard, 100-240VAC 50/60Hz
$1,683⁵⁰	In stock + −	DFS 5.1A-1-A	Sensor Cable Length: 20 ft. shielded coaxial cable	Power Input: Standard, 100-240VAC 50/60Hz
$1,788⁸⁰	In stock + −	DFS 5.1A-1-B	Sensor Cable Length: 50 ft. continuous shielded coaxial pair	Power Input: Standard, 100-240VAC 50/60Hz

Controls Flow with no pressure drop, no sensor fouling and no maintenance
Flow control from the outside of metal or plastic pipes
Installs in Minutes
Pipe Size: Any pipe ID from ½" to 180" (12.5 mm to 4.5 m)
5 amp DPDT Control Relay
Ideal for "difficult" liquids
Adjustable ON/OFF set-points
Hi or Lo flow alarm mode
Adjustable time delay
Relay status LED
Flow rate LED bargraph
Watertight, dust tight NEMA4X (IP 67) polycarbonate enclosure with a clear shatter-proof face
Easy Calibration

The Greyline Instruments by Pulsar DFS 5.1 Doppler flow switch provides accurate flow control from outside of the pipe. Recommended for difficult liquids including wastewater, cooling water, slurries, sludge, chemicals, viscous liquids and abrasives, the DFS 5.1 is ideal for pump protection or to activate flow/no-flow alarms.

The DFS 5.1 ultrasonic sensor can be mounted on the outside of any metal or plastic pipes from 1/2 to 180" I.D. and installs in minutes. The sensor continuously injects high frequency sound through the pipe wall and into the moving fluid where acoustic pulses are reflected back to the sensor from particles or bubbles in the fluid. The DFS 5.1 control relay can be set to turn ON and OFF at any flow rate between 0.25 and 10 ft/sec (0.075 to 3 m/sec). The DFS 5.1 relay time delay is adjustable from 0 to 80 seconds to prevent nuisance alarms and relay "chatter" in turbulent flow. Includes switch selectable "normal" and "failsafe" operating modes.

The DFS 5.1 has no moving parts and no maintenance is required. Installation can be made while the flow system is in full operation. No contact is made with the moving fluid and no holes are drilled in the pipe. There is no fouling or scale build-up on the sensor.

The compact, water tight electronics enclosure includes adjustable controls with separate ON and OFF relay set-points and time delay. A LED bargraph for flow rate and set points plus relay status are included. Switch adjustments and electrical connections are fast and easy.

Greyline Instruments DFS 5.1 Doppler Flow Switch Standard, 100-240VAC 50/60Hz 100 ft. continuous shielded coaxial pair

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