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Flow Switches

15 Products
Compact Fan and Filter Fan Air Flow Switch

The FSW800B-Series air-flow monitor provides a simple but reliable alternative to indicate positive or negative air flow of fans.

Vane Flow Switch for 1-6 in Pipes, 150 psig, 212 °F - Chemical & HVAC Use

The Vane Flow Switch is designed for 1-6 inch pipes, ideal for chemical and HVAC applications. It ensures equipment protection with excellent durability and chemical resistance.

Flow Switch, LED Indicators, Adjustable Flow Rate, NO/NC Outputs

The Series TDFS2 Thermal Dispersion Flow Switch features adjustable flow rates and LED indicators for easy monitoring. Ideal for boilers, chillers, and liquid transfer systems.

Thermal Dispersion Flow Switches for Use With Gases

The FST-320-Series thermal dispersion flow switches, especially designed for use with gases, sense changes in the heat transfer characteristics of the gases.

Economical Brass Flow Switches

The FSW301 flow switch comprises a paddle system with a permanent magnet attached. This construction allows a useful life of up to 100,000,000 switching cycles.

Heavy Duty Paddle Flow Switch

The FSW-160 is the newest heavy-duty line of flow switches.The switch is used to signal,start,or stop electronically operated equipment when flow or no-flow conditions occur.

Adjustable Air Flow Paddle Switch for HVAC - Stainless Steel Vane

The Adjustable Air Flow Paddle Switch features a stainless steel vane and a durable design, perfect for detecting air flow in HVAC systems with minimal calibration.

Industrial Flow Switches - From 2 to 15 Feet/second

The FSW-40A and FSW-50-Series flow switches feature 15 A SPDT switches. Their non-magnetic design makes these switches ideal for applications in which rust is a problem.

Trim to Size Paddle Type Flow Switch

The FSW-25 flow switch utilizes the force of liquid flow to propel its paddle and to detect the incoming flow or movement of the existing liquid in the pipe.

Air Flow Indicator & Alarm for Radon Mitigation – 85 dB Alert, Battery-Powered

The Air Flow Indicator & Alarm alerts you to low air flow in radon mitigation systems. It features an 85 dB alarm, bright LED alerts, and is battery-powered for easy installation.

Piezo Flow Monitor for Pipes & Chutes, Adjustable Sensitivity, No Maintenance

The Series BFM Bulk Flow Monitor ensures reliable flow detection in pipes and chutes. With adjustable sensitivity and no maintenance, it's ideal for various applications.

Compact Flotect® Flow Switch – Weatherproof, NEMA 4, Fits 1/2 to 2 in Pipes

The Compact Flotect® Flow Switch is a weatherproof, NEMA 4 device designed for 1/2 to 2-inch pipes, ensuring reliable flow monitoring for liquids, gases, and air.

Thermal Dispersion Flow Switches for Liquids

The FST-200 flow switches use thermal dispersion technology to create a very accurate and economical method of sensing flow. Monitor fluids from 0.4 to 1.2 specific gravity.

Polypropylene Flow Switches – 3/8" or 1/4" NPT for Water & Cooling Systems

The Series P3 Polypropylene Flow Switches offer versatile inlet options for water and cooling systems. Ideal for pure water equipment and heat exchangers.

Non-magnetic Industrial Flow Switches - Ideal for Rusty Water

The FSW-30A flow switches are supplied with six orifices to provide 6 overlapping flow ranges from 0.12 to 8.0 GPM for water. Wetted Parts: brass, 316 SS, phosphor bronze.

Flow Switches

Flow Switches support automation, monitoring, switching, indication, safety, motion, or process control tasks in industrial, HVAC, laboratory, facility, and OEM systems. Products span liquid flow switches, gas flow switches, paddle flow switches, thermal dispersion switches, relay flow switches, and process flow detection devices.

Applications include pump protection, cooling water proof, HVAC flow verification, chemical lines, gas flow alarms, heater protection, and process interlocks. Products represented in the source data include Omega Engineering and Dwyer Instruments.

Applications include:

  • Switch loads, alarms, control circuits, or interlocks
  • Use relays, timers, pushbuttons, safety switches, or alarm devices
  • Support equipment sequencing, operator control, and protection
  • Mount devices in panels, enclosures, or field locations
  • Match contact ratings, coil voltage, and enclosure needs
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