ASK Co., Ltd. Hydraulic, Coolant Accessories&Measuring Instruments.

ASKロゴ

ASK Corporation. Hydraulic, Coolant Accessories and Measuring Instruments.

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◁Measuring equipment

▼Digital flow sensor DFS

Digital flow sensor DFS

RoHS
CE
CE
Digital flow sensor DFS

※Please prepare the connection cable separately.

A multi-function switch/site/meter model with newly added analog output function!

    • Equipped with analog output function ※

      Flow rate can be constantly output externally at 4 to 20 mA.

      ※It applies to models with the label “Pin2:4-20mA” at the bottom of the main unit.

    • Newly adopted magnetless rotor ※

      Magnetic foreign matter is less likely to adhere than previous models.

      ※It applies to models with the label “Pin2:4-20mA” at the bottom of the main unit.

    • How to connect: M12 ×1-4 pin connector.

    • You can use this with an input power supply of from 12 to 24 V DC.

    • Amplifier protection structure conforms to IP67 equivalent.

    • You can set a lower limit of flow rate. If flow rate falls below the limit, you are warned by a red LED lamp and an output signal.

    • In case of low pressure spec, you can check flow of fluid by observing rotor rotation from a metal/plastic cap.

    • In case of high pressure spec, you can measure flow rate at 25MPa.

      If you use DFS-2, 3, or 6, You must use an all-metal cap for high pressure. Factory setting: all-metal cap for high pressure.

    • You can select a position (horizontal, vertical, or tilted) to install.

    • Rotor can be cleaned by air blow, after taking off a metal cap from a main body.

  • Description

    Model description
    Detailed model description

    Body and overall spec

    Overall specifications

    ※1:You can't visually observe flow, when you use an all-metal cap.
    ※2:Guaranteed value at 32 cSt about O spec accuracy
    ※3:Ajustment depends on fluid which you use. Specify it when ordering.
    ※4:Indicated a value at 32 cSt, when max. flow rate.

    Amplifier spec

    Amplifier section specifications

    ※5:You can select non-display mode.
    ※6:You can set a lower limit of flow rate optionally. Regarding how to set, refer to an instruction manual.

    Output type

    Output diagram

    How to connect

    connector description

    Analog output

    DPS 配線説明

    Principle

    Diagram of operating principle

    The detection part of a digital flow sensor utilizes rotation of a rotor(turbine) installed in the passage.
    The measuring part detects, by means of the external magnetic sensor, the rotational speed of the Magnetic material mounted on the circumference of the rotor.
    You can select NPN output or PNP output optionally.

    Accuracy

    Fluid compatible specifications

    The test at our factory is performed in the condition as follows.
    Confirm specifications of each digital flow sensor about accuracy.

    Sensor selection chart

    Measurement flow range list

    Precaution of use

    • Do not use this sensor in the place to be sprayed with coolant liquid directly to an amplifier.

    • An amplifier case is made of ABS. Do not use the ingredients of coolant influencing ABS.

    • Be sure to use within the maximum flow rate.

    • Do not install this near a machine generating magnetic field like a motor to avoid malfunction.

    • Upstream side: 10 times of pipe inner diameter, downstream side: 4 times for straight pipe

      Don't install a curve, confluence, or junction (like an elbow, tee, or throttle valve) near an outlet side.

    Upstream/downstream straight pipe length
    • To prevent clogging due to foreign matter,install a filter of about 20 to 50 microns upstream.

      ※ Contact our sales staff, for use of a NC lathe for general purpose or grinding machine with coolant containing much cut dust.

      ※ If cut dust sticking to the rotor prevents it from rotating, remove the front cap of the main body and perform air blow to eliminate the cut dust.

    • Regarding "O" spec, influence of fluid viscosity may cause "change of measuring value" 

      and "consumption in short time of components". Use fluid at 32cSt ± 50%.

    DFS 設置可否イメージ

    Example of use

    • Seizure can be avoided by oil flow control for the spindles and bearing of machine tools, printing machines, and presses.

    • Tool damage and fire can be prevented by control of coolant flow to machine tools.

    • This sensor is used to check if a filter is clogged or not.

    • Coolant flow control.

    Document download

    Drawing PDF download

    *Data is located on Google Drive. If you are unable to access Google Drive due to internal security reasons,
      we will send it as an email attachment, so please use the inquiry form (Contact Us) to request it.
    ▷If you would like CAD data or instruction manuals, please use the inquiry form.

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     Copyright(C) ASK co.,ltd. All Right Reserved.

    Copyright(C) ASK co.,ltd. All Right Reserved.