Flow Switches

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  • Harwil Q-16 Flow Switch

    Item Type Media Type Connection Size Technology
    Industrial, OEM Corrosive Chemicals, Viscous Liquid (Oils, Syrups, etc.), Water (Clean) or Similar Liquids 1 - 1 1/2 Paddle

    Harwil® type Q-16 switches are used to signal, start, or stop electronically operated equipment when flow or no-flow conditions occur. Harwil’s patented elastomeric sealing system is superior to the metal bellows that are subject to metal fatigue and corrosion. This seal system has been field-proven for over a decade.

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    Data Sheet
  • Harwil Q-4 Flow Switch

    Item Type Media Type Connection Size Technology
    Industrial Viscous Liquid (Oils, Syrups, etc.), Water (Clean) or Similar Liquids 1 - 1 1/2 Paddle

    Harwil® type Q-4 industrial flow switches are designed for extreme, long-term reliability, and for use in particle contaminated fluids. They detect and signal flow change and remain continuously adjustable while in operation. Four individual paddle options plus continuous adjustment provide a wide operating range. They maintain calibration limits when subjected to reasonable line hydraulic hammer or surge pulses. A DPDT model is available upon request.

    Data Sheet
  • Harwil Q-5/Q-5SS Flow Switch

    Item Type Media Type Connection Size Technology
    Industrial Corrosive Chemicals, Viscous Liquid (Oils, Syrups, etc.), Water (Clean) or Similar Liquids 1 - 1 1/2 Paddle

    Harwil® type Q-5 & Q-5SS industrial flow switches are designed for extreme, long-term reliability, and for use in particle contaminated fluids. Multiple quick change paddles and continuous spring adjustment provide an incredibly wide operating range of flow rates and viscosities. They are calibrated independent of line pressure and temperature, and maintain calibration limits when subjected to reasonable line hydraulic hammer or surge pulses. A DPDT model is available upon request.

    Data Sheet
  • Harwil Q-8DS/QD-8DS Flow Switch

    Item Type Media Type Connection Size Technology
    Industrial Corrosive Chemicals, Water (Clean) or Similar Liquids 1 - 1 1/2 Paddle

    Harwil® type Q-8DS & QD-8DS industrial flow switches are designed for long-term reliability and chemical resistance. They detect and signal flow change and respond to flow only, independent of line pressure, temperature, or environment. They offer super simple maintenance and checkout for personnel using a standard test meter.

    Data Sheet
  • Harwil Q-8N/Q-8CR Flow Switch

    Item Type Media Type Connection Size Technology
    Industrial Corrosive Chemicals, Water (Clean) or Similar Liquids 1 - 1 1/2 Paddle

    Harwil® type Q-8N & Q-8CR industrial flow switches are designed for long-term reliability and chemical resistance. They detect and signal flow change and remain continuously adjustable while in operation. Particle contamination resistance is provided by a single convolute elastomeric seal which is continually flushed by working fluid flow.

    Data Sheet
  • Kobold DW Flow Switch

    Item Type Media Type Connection Size Technology
    Industrial Corrosive Chemicals, Viscous Liquid (Oils, Syrups, etc.), Water (Clean) or Similar Liquids 1/8 - 3/4, 1 - 1 1/2, 2 - 3 Paddle

    Kobold® type DWU, DWN, and DWS flow meters and flow switches are based on the paddle, or static plate, principle. This type of arrangement is ideal for use in applications where dirt and solid grain contaminants are of concern. The paddle-bellows design offers large internal clearances and mechanical insensitivity to a wide range of particulate matter.

    Data Sheet
  • Kobold FPS Flow Switch

    Item Type Media Type Connection Size Technology
    Industrial Corrosive Chemicals, Water (Clean) or Similar Liquids 1 - 1 1/2 Paddle

    Kobold® type FPS paddle-bellows flow switches are used wherever reliable control for minimum or maximum liquid flow is required. The interchangeable paddles, in conjunction with an external adjustment screw, allow for adjustment over a wide range of switching points and easy adaptation of the flow switch to different pipe sizes. The internals of the instrument are separated from the process by the bellows, making it an excellent choice for dirty media. The FPS-6 Series is a special design variation used when lower switching points are desirable.

    Data Sheet
  • Kobold PPS Flow Switch

    Item Type Media Type Connection Size Technology
    Industrial, OEM Corrosive Chemicals, Viscous Liquid (Oils, Syrups, etc.), Water (Clean) or Similar Liquids 1 - 1 1/2 Paddle

    Kobold® type PPS Polysulfone paddle flow switches are for pipes 1″ and larger, and combine reliability with an economical price. They are also virtually maintenance free. The pressure drop across the instrument is negligible. It is available with either a normally open, normally closed, or SPDT reed switch contact.

    Data Sheet
  • Kobold PS/PSR Flow Switch

    Item Type Media Type Connection Size Technology
    OEM Corrosive Chemicals, Water (Clean) or Similar Liquids 1/8 - 3/4, 1 - 1 1/2 Paddle

    Kobold® type PS & PSR paddle flow switches can be used wherever a simple economic yet reliable monitoring instrument is required for flow switching applications. A movable reed switch allows the contacts to be set either normally open (N/O) or normally closed (N/C).

    Data Sheet