Flow Switch with Non-Contacting Sensor
Mount the UF DS200 ultrasonic sensor on the outside of metal or plastic pipes. 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.
Flow rates of most liquids can be accurately controlled, including acids, caustics, lubrication fluids, chemicals, abrasives, waste water and sludge. There are no moving parts, and no sensor maintenance is required.
The compact, water-tight electronics enclosure includes adjustable controls with separate ON and OFF relay set-points and time delay. An LED bargraph for flow rate, set points, and relay status is included.
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.
Easy to Calibrate
The UF DS200 control relay can be set to turn ON and OFF at any flow rate between 0.075 to 3 m/sec (0.25 and 10 ft/sec). Insert two links for separate ON/OFF set points or just one link for a Hi or Lo flow alarm. Set the relay actuation time delay from 0 to 80 seconds.
Ideal for Pump Protection
Avoid expensive pump repairs and downtime. The UF DS200 strap-on Sensor can be installed in minutes without shutting down the flow or cutting the pipe. Use the adjustable relay time delay to eliminate relay “chatter” and reduce pump wear.
Reliable and Repeatable
Repeatability is ±0.1% of full scale (0.003 m/sec or 0.1ft/sec). There are no moving parts, and no maintenance is required. The clamp-on ultrasonic sensor cannot be damaged or fouled by contact with the liquid it measures.
Sealed in a stainless steel housing, the UF DS200 sensor withstands moisture or accidental submersion in water up to 10 psi (69 kPa).
Self-tunes to Extended Sensor Cable
An extra sensor coaxial cable of up to 150 m (500 ft) can be added. An extended cable and junction box can be ordered. The cable can be cut or extended as required during installation. The flow switch automatically tunes to the cable length. No circuit adjustment or calibration is required.
Designed for “difficult” liquids
The UF DS200 Doppler Flow Switch is recommended for flow control of liquids containing gas bubbles or solids: chemicals, slurries, sewage, sludge, viscous liquids, wastewater, caustics and abrasives.
The ultrasonic sensor injects high-frequency sound through the pipe wall into the flowing liquid. Acoustic pulses are continuously reflected back to the sensor, and the UF DS200 measures a frequency shift to calculate flow velocity.
