

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