Flow Instruments

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  • GPI LM Flow Meter

    Moving or Non-Moving Parts Media Type Connection Size Technology
    Moving Parts Viscous Liquid (Oils, Syrups, etc.) 1/8 - 3/4 Positive Displacement

    GPI® type LM Series mechanical lube flow meters are compact meters perfect for metering engine oils or transmission fluids (maximum viscosity 1000cps). The LM50M Mechanical Meter is suitable for hazardous locations. Choose the LM50P when Pulse Out without Display meets your application. The LM50D model includes an easy-to-read display. All meters are designed with oval rotors for optimum accuracy.

    Data Sheet
  • GPI QMF Flow Meter

    Moving or Non-Moving Parts Media Type Connection Size Technology
    Non-Moving Parts Corrosive Chemicals, Viscous Liquid (Oils, Syrups, etc.), Water (Clean) or Similar Liquids 1/8 - 3/4, 1 - 1 1/2, 2 - 3, 4+ Ultrasonic

    GPI® type QMF is a fixed QStar Ultrasonic flow meter model. The use of multiple processors working in parallel means that QStar achieves an extremely high measurement rate. Signal processing takes place in high performance DSPs which are extremely precise and operate at very high resolution. This enables the device to achieve internal resolution of under 0.001 m/s flow velocity. And since the transit time measurement is purely digital, the measurement electronics are virtually drift and calibration free.

  • GPI TM Flow Meter

    Moving or Non-Moving Parts Media Type Connection Size Technology
    Moving Parts Corrosive Chemicals, Water (Clean) or Similar Liquids 1/8 - 3/4, 1 - 1 1/2, 2 - 3, 4+ Paddle Wheel

    GPI® type TM Series water flow meters are accurate, economical, and designed to last. These meters are used for water processing and irrigation applications. They meet Schedule 80 PVC specifications and come standard with a low-profile display. They come in seven sizes with three fitting types, offering flowrates from 1-800 GPM.

    Data Sheet
  • Harwil Q-1 Flow Switch

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

    Harwil® type Q-1 industrial flow switches are designed for extreme, long-term reliability. They detect and signal flow change and remain continuously adjustable while in operation. Six interchangeable orifices have 2:1 continuous switch adjustment. 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-10N/Q-10VCR Flow Switch

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

    Harwil® type Q-10N & Q-10VCR switches are provided with three factory adjustable parameters – paddle area, length, & stiffness – which provide performance flexibility to meet a multitude of applications. They respond to fluid flow only, independent of line pressure and temperature. A positive stop eliminates fatigue effects of turbulence, vibration, and flow surge on flow detecting element. Their small size and low profile provides easy mounting in crowded installations.

  • Harwil Q-12N/Q12CR Flow Switch

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

    Harwil® type Q-12N & Q-12CR switches are provided with three factory adjustable parameters – paddle area, length, & stiffness – which provide performance flexibility to meet a multitude of applications. A positive stop eliminates fatigue effects of turbulence, vibration, and flow surge on flow detecting element. They have a very low pressure drop, typically less than 1.0psig at normal flow rate. Their small size and low profile provides easy mounting in crowded installations.

    Data Sheet
  • 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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  • 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