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Flow Switches

41 Products
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.

Mini Flow Switches for 1/2 to 2 in Pipelines, Brass or SS Body

The Series V10 Mini Flow Switches monitor flow in 1/2 to 2-inch pipelines. Available in brass or stainless steel, they ensure reliable performance for various applications.

Flotect® Flow Switches: Weatherproof, Explosion-Proof, Low Flow Protection

The Flotect® Flow Switches provide reliable low flow protection in weatherproof and explosion-proof designs. Ideal for safeguarding pumps and systems in demanding environments.

Vane Flow Switch for Boilers & Heaters, Adjustable 1-8 in Pipes

The Series FS-2 Vane Flow Switch is designed for boilers and heaters, adjustable for 1-8" pipes. Ideal for flow proving in various applications, featuring durable aluminum housing.

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.

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.

Piston Flow Switch for Air/Water, 0.05-1 GPM, SPST Reed, FDA Compliant

The P2 Flow Switch features a compact piston design for air and pure water applications, with FDA compliant materials, ideal for monitoring filter life and cooling systems.

Flotect® Flow Switch for Liquids, NEMA 4X, Ideal for Boilers & Pumps

The Flotect® Flow Switch for Liquids is a reliable NEMA 4X device designed for boilers and pumps, ensuring safe operation by detecting flow conditions in various applications.

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.

Adjustable Air Flow Switch for Ducts, ± 5% Repeatability, 1-10 m/s, 3 A Output

The Air Flow Switch monitors duct air flow and comes with a mounting bracket for easy installation. It is used for fan, filter, and air handler monitoring.

3/4 in Flow Switches for Threaded Plastic Piping

The FS-100-Series offers low cost flow monitoring with a variety of switch actuation points and low pressure drop. All wetted parts are polypropylene.

Globe Valve Flow Switches ± 1% Repeatability, Adjustable for Liquids

The Series GVS Globe Valve Flow Switches ensure precise flow detection for liquids with 1% repeatability and adjustable settings, ideal for lubrication and cooling applications.

Brass High Pressure Flow Switches, 0.25-2.0 GPM, Industrial Use

The Brass High Pressure Flow Switches are designed for industrial use, managing liquid flow from 0.25 to 2.0 GPM. Ideal for cleaning and lubrication 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.

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.

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.

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.

Brass Flow Switches, Piston Mechanism, 0.10-1.5 GPM, for Liquid Flow

The Series P1 Brass Flow Switches feature a piston mechanism for precise flow detection, suitable for liquid applications between 0.10-1.5 GPM. Ideal for industrial use.

TDS Thermal Flow Switch for Non-Coating Liquids, Adjustable SPDT Output

The TDS Thermal Flow Switch detects non-coating liquids, featuring adjustable SPDT output and LED indicators for flow status. Ideal for pump and process protection.

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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