Please Wait

EN
  • FA
  • NL
  • EN

MFS/MFS QT multi flow sensor

The MFS is a combined flow, pressure and temperature sensor (three-in-one) from Direct Sensors. The sensor is based on the principle of vortex shedding behind a bluff body.

  • Description
  • Specification
  • DESCRIPTION

    The MFS is a combined flow, pressure and temperature sensor (three-in-one) from Direct Sensors. The sensor is based on the principle of vortex shedding behind a bluff body. The MFS sensor is designed for high-volume production and fully compatible with wet, aggressive liquids. The sensor is based on MEMS sensing technology in combination with a unique packaging concept using corrosion-resistant coating on the MEMS sensor chip. This makes the sensor very robust and ideal for high-volume OEM (Original Equipment Manufacturer) applications.

     

    Applications

    • Pump control
    • HVAC systems
    • temperature control and chiller systems
    • renewable energies such as heat pumps, solar thermals, fresh water and micro-CHP systems
    • monitoring and control systems
    • water treatment plants
    • water utility and distribution systems
    • HPC (High-Performance Computing) and IT cooling systems.

     

    Features and benefits

    • Flow, pressure and temperature measurement in one sensor (three-in-one solution) for easy and cost-efficient installation
    • Measurement principle with no movable parts, resulting in no wear and tear
    • self-configuring digital or analog output
    • MEMS technology
    • direct contact with the liquid resulting in a fast response time
    • plug and play for quick setup
    • smart system solution with pump controls
    • compact and robust design
    • compatible with aqueous media
    • For aqeous media below 2 μS/cm contact your local sensor representative
    • suitable for a wide temperature range
    • suitable for a wide range of application.

     

    Power supply requirements

    • 5 VDC ± 5 %, PELV
    • maximum 10 mV ripple, 50 Hz
    • minimum output current, 25 mA
    • separated from hazardous live circuitry by double or reinforced insulation
    • grounding of sensor supply is required.

     

    Directives
    The Direct Sensors are in conformity with these council directives on the approximation of the laws of the EC member states:

    • Low Voltage Directive (2014/35/EU): Standards used: EN 61010-1:2010
    • EMC Directive (2014/30/EU): Standards used: EN 61326-1:2013 and EN 61326-2-3:2013

     

    The MFS flow sensor consists of a composite flow pipe and a sensor fitted with cable.
    The MFS flow sensor is available in 2-20, 4-40,10-100, 20-200, 40-400 l/min versions. The MFS QT flow sensor consists of a composite insert, a stainless steel flow pipe and a sensor fitted with cable. The MFS QT flow sensor is available in 2-18, 4-40, 10-100, 20-200 l/min versions. The differential temperature is between two standard
    Direct Sensors.

  • SPECIFICATION

    Flow measuring range 2-20 l/min (0.53 to 5.3 gpm)
    4-40 l/min (1.06 - 10.6 gpm)
    10-100 l/min (2.6-26 gpm)
    MFS 20-200 (5.3 - 53 gpm)
    MFS 40-400 (10.6 - 106 gpm)
    2-18 l/min (0.39 - 4.8 gpm)
    QT 4-40 l/min (1-10.6 gpm)
    10-100 (2.6 -26 gpm)
    10-100 (2.6 -26 gpm)
    Accuracy (± 1 σ) in water 0-120 °C (32-248 °F) ± 1 % FS
    Response time (63.2 %) Less than 4 s
    Resolution max flow/16384 l/min or gpm
    Pressure measuring range 0-10 bar (0-145 psig)
    Pressure accuracy (± 1 σ) 15-90 °C (59-194 °F) ± 2.0 % FS
    0-120 °C (32-248 °F) ± 2.5 % FS
    Response time for sensor electronic 250 ms
    Resolution 0.6 mbar (0.009 psig)
    Temperature measuring range 0-120 °C (32-248 °F)
    Temperature accuracy (± 1 σ) 15-90 °C (59-194 °F) ± 0.5 K
    0-120 °C (32-248 °F) ± 1 K
    Response time (63.2 % at 50 % FS flow) 250 ms
    Resolution 0.006 K
    Differential Temperature Accuracy 15-90 °C (59-194 °F) 0.3 K
    0-120 °C (32-248 °F) 0.5 K
    Liquids Aqueous media compatible with wetted materials. Kinematic viscosity less than or equal to 2 mm2/s (cSt)
    System temperature, operation 0-100 °C (32-212 °F)
    System temperature, peak -25 °C (-13 °F), non-freezing 120 °C (248 °F) for 5 minutes, up to 3 weeks in sensor lifetime
    Ambient temperature, operation -25 to +60 °C (-13 to +140 °F)
    Ambient temperature, peak -55 to +90 °C (-67 to +194 °F)
    Humidity, relative 0-95 %, non-condensing
    Maximum System Pressure 24 bar (348 psig)
    Burst Pressure 30 bar (435 psig)
    Maximum system pressure example Max 10 bar (145 psig) at 100 °C (212 °F)
    Power supply 5 VDC (± 5 %), PELV Grounding of sensor supply required
    Digital output signals Grundfos open data protocol
    Analog output signals, only two signals possible (analogue variants are upon request) 0.5 - 3.5 for flow (zero at 0.35 V) and pressure (zero at 0.5 V)
    0.5 - 4.1 V for temperature (zero at 0.5 V and 100 °C at 3.5 V)
    Power consumption Approximately 75 mW
    Load impedance > 47 kΩ
    Sensing element Silicon-based MEMS
    Sealing EPDM O-ring or FKM O-ring
    Housing Composite (PPS, PA66)
    Flow pipe PPA 40-GF
    Stainless steel AISI 316 EN 1.4408
    Wetted materials Corrosion-resistant coating, EPDM or FKM, PPS, PPA 40-GF
    Enclosure class IP44, cable connected
    Temperature cycling IEC 68-2-14
    Vibration, non-destructive 20-2000 Hz, 10G, 4 h
    Electromagnetic compatibility EN 61326-1
    Certificates CE - C, CSA, US - EAC

RELATED PRODUCTS