Skip to main content
Press Enter
OMEGA

FST-221-R Flow Switch With Compact Relay Controller

Flow Switch With Compact Relay Controller

Have questions? We're here to help!
Have questions? We're here to help!

 This switch package offers a complete solution for flow or no-flow switching in pipes or ducting up to 0.3 m (12'). The compact relay controller reliably actuates valves, pumps, or blowers rated up to 1/2 hp. Common applications include low-flow pump or process protection. To complete the instrumentation package, simply select the switch configuration in accordance with the liquid or gas used in your application.

 
• Offered in Liquid and Gas Configurations
• All-Plastic Construction with PP or PVDF Materials for Corrosive Environments
• Invert Switch Provides Simple NO or NC Relay Operation
• LED Indicators for Fluid, Relay and Power Status
Accuracy±5% of setpoint at constant temperature and flow rate
Range0.04 to 3 ft/s (liquids)
Sensor
Conduit Connection1/2 NPT
Enclosure Rotation300° swivel base
Enclosure MaterialPolypropylene (UL 94VO)
Enclosure RatingNEMA 4X (IP66)
Temp Range-40 to 70°C (-40 to 158°F)
Time Delay0 to 60 s
Relay ModeNO or NC selectable
Relay Current10 A, 250 Vac, 1/2 hp
Relay Type(1) SPDT
Consumption0.25 A
Supply Voltage120/240 Vac 50/60 Hz
Relay Controller
Dimensions208 L x 71 mm Dia (8.2 x 2.8')
Process Connection3/4 MNPT
PP or PVDF150 psi @ 25°C (77°F) derated @ 1.7 psi/°C above 25°C (77°F)
Max Fluid Pressure
Fluid Temperature60°C (140°F)
Setpoint Drift with Fluid Temperature0.5%/°C
Response Time10 s (approx.)
  • Thumbnail of document Manual - FST-221-R Flow Switch With Compact Relay Controller
    Download

    Manual - FST-221-R Flow Switch With Compact Relay Controller

    Download
  • Thumbnail of document Data Sheet - FST-221-R Flow Switch With Compact Relay Controller
    Download

    Data Sheet - FST-221-R Flow Switch With Compact Relay Controller

    Download

Request a Calibration Quote

We’re here to make calibration easy. Request a quote today and let our team give you the care, precision, and service you can trust.
Learn more

Browse By Brands

Uncover the brands that set the standard for quality and dependability in every industry we serve.
Learn more