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OMEGA FST321SPST Thermal dispersion flow switch

The FST-320 Series thermal dispersion flow switches are designed for high reliability gas flow monitoring without moving parts. Suitable for small pipes and large ducts, they sense heat transfer changes to accurately measure gas flow velocities from 1 to 90 fps. Featuring a standard SPST relay output, these sensors are easy to install in line sizes from ½ to 12 inches. With quick response times, adjustable set points, and options for polypropylene or PVDF contact materials, they effectively control and monitor critical gas flows in various industrial applications.

Authorized Distributors
Source:DigiKey
Part No:FST-321-SPST
Stock:0
Inv Date:06-12-2026
Price: Unit price: $447.31
Buy/RFQ:

OMEGA FST321SPST Thermal dispersion flow switch Specifications:

  • Range: 1 to 90 fps
  • Accuracy: +5% of setpoint at constant temperature and flow rate
  • Response Time: approximately 10 seconds after 30 seconds warm-up
  • Set Point Drift: 0.5% per °C
  • Voltage Input: 12 to 36 Vdc @ 70 mA
  • Contact Output: NO or NC, selectable
  • Fluid Temperature Rating: 0 to 60°C (32 to 140°F)
  • Maximum Fluid Pressure: 150 psi @ 25°C (77°F), derated at 1.667 psi per °C above 25°C
  • Contact Materials: Polypropylene with PVDF
  • Cable Length: 3 meters (10 feet), optional extended length up to 15.24 meters (50 feet)
  • Maximum Cable Run: 305 meters (1000 feet)
  • Dimensions: 76.2 or 114.3 x 26.7 mm (3.0 or 4.5 x 1.05 inches)
  • Connection: 44 NPT threading
  • Pipe Size Compatibility: ½ to 12 inches depending on model

Buy the Buy Vimana FST-320 Series Part Number FST321SPST Online

Order the Vimana thermal dispersion flow switch today and enjoy reliable gas flow monitoring without moving parts. Designed for pipes from ½ to 12 inches, it offers quick response times, easy installation, and accurate flow detection between 1 and 90 fps. Features include a standard SPST relay, polypropylene or PVDF contacts for chemical compatibility, and flexible cable lengths up to 50 feet. Perfect for industrial gas flow control, this switch enhances process reliability and safety effortlessly.

Buy Vimana FST-321-SPST gas flow switch now and ensure precise, reliable monitoring of your critical gas flows with ease and efficiency.

Frequently Asked Questions

Where can I buy OMEGA FST321SPST?

You can click on the BUY or RFQ button to purchase FST321SPST from an authorized OMEGA distributor.

How do I troubleshoot issues or seek technical support for part FST321SPST?

You can download the FST321SPST datasheet or visit the OMEGA website for support.

Who is the manufacturer of FST321SPST?

OMEGA

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