Pulsar Measurement – DFS 5.1 – Clamp-On Doppler Ultrasonic…
DFS 5.1 Doppler flow switch2. DFS 5.1 Doppler Flow Switch (2)
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Pulsar Measurement – DFS 5.1 – Clamp-On Doppler Ultrasonic Flow Switch (Non-Contact, For Difficult Liquids)

The DFS 5.1 Doppler Flow Switch is a valuable tool for pump protection and flow or no-flow alarms.

Certification & ratingVerified
TechnologyDoppler ultrasonic
FunctionFlow switch (flow/no-flow)
InstallationClamp-on, non-invasive
  • Genuine certified equipment sourced directly through Daly Middle East.
  • Full manufacturer support and warranty.
Overview

About this product

The DFS 5.1 Doppler Flow Switch is a valuable tool for pump protection and flow or no-flow alarms. It offers basic process control for pipe flow measurement, especially for challenging liquids like wastewater, slurries, chemicals, and more. This non-contacting ultrasonic sensor is easy to install on metal or plastic pipes without disrupting flow, increasing efficiency. With no maintenance needed, it works on pipes 12.5 mm or larger, with adjustable flow rate settings and the ability to set separate ON/OFF points or high/low flow alarms using relays.

Explore related Pulsar flow measurement: Pulsar Measurement solutions and flow meters.

DFS 5.1 application and selection

The DFS 5.1 is listed as a clamp-on Doppler ultrasonic flow switch for difficult liquids. It is a non-contact option for flow detection and process-control applications where the liquid condition and pipe access are suitable.

Selection checklist

Before requesting a configuration, provide the process medium, pipe or channel details, normal and maximum operating range, installation access, temporary or permanent requirement and the output or communication needed by the receiving system. Photographs, drawings and existing nameplate details are useful for replacement or retrofit enquiries.

Compare this model with the ultrasonic flow meter selection guide and the Pulsar Measurement product range to confirm the measurement approach.

Frequently asked question

How is this model selected for a project?

Is DFS 5.1 a flow meter? The listed product is a flow switch. Share the required detection point, liquid condition and required alarm or control output.

Request technical sizing and quotation support with the application details.

Built for the job

Key features

Clamp-on Doppler ultrasonic flow switch

Non-contact design for difficult liquids

Provides flow/no-flow switching for pump protection and process control

External mounting requires no pipe cutting or system shutdown

Product FAQ

Frequently asked

What does the DFS 5.1 do?
It acts as a flow switch, detecting flow or no-flow conditions for pump protection and process control.
What liquids can it monitor?
Difficult liquids that are challenging for standard flow sensors, using non-contact Doppler ultrasonic technology.