WIKA RSM 垂直安装永磁式 浮球液位开关

带防爆 不锈钢及塑壳

Float Switches with Permanent Magnet
For Vertical Installation
Model RSM

   Applications

   Level measurement for almost all liquid media
    Pump/level control and monitoring for defined filling levels
    Chemical industry, petrochemical industry, natural gas,offshore, shipbuilding, machine building, power generating equipment, power stations
    Process water and drinking water treatment, food and beverage industry

   Special Features
    Large scope of application due to the simple, proven functional principle
    For harsh operating conditions, long service life
    Operating limits:
      - Operating temperature: T = -196 ... +300 °C
      - Working pressure: P = vacuum to 100 bar
      - Limit S. G.: ρ ≥ 400 kg/m3
    Wide variety of different electrical connections, process connections and materials
    Explosion-protected versions

   Description
    A float with a permanent magnet moves reliably along with the liquid level on a guide tube. Within the guide tube is fitted a reed contact (inert gas contact), which is energised, through the non-magnetic walls of the float and guide tube, by the approach of the float magnet. By using a magnet and reed contact the switching operation is non-contact, free from wear and needs no power supply. The contacts
are potential-free. WIKA float switches with permanent magnets are also available with several switch points.

    The switch functions always refer to a rising liquid level: normally open / normally closed / change-over contacts.
    Through the use of a float for a max. of 2 switch points a bistable switch operation can be achieved, meaning that the switching status also remains available, when the filling level continues to rise above or drop below the switch point.
The float switch is simple to mount and maintenance-free, so the costs of mounting, commissioning and operation are low.

   Further special features
    Process connection, guide tube material and float made of stainless steel 1.4571 or plastic
    Universal signal processing: connection direct to a PLC is possible, NAMUR connection,signal amplification / contact protection relays
    Works independently of foaming, conductivity, dielectricity, pressure, vacuum, temperature, steam, condensation,blistering, boiling effects and vibrations
    Multiple functionality in a single instrument - up to 8 potential-free contacts
    Exact repeatability of the switch points
    Float switches with permanent magnets qualify as passive electrical equipment in accordance with DIN IEC 60 079-11 and can be installed in 'Zone 1' hazardous areas without certification, so long as the equipment is operated in a certified intrinsically safe circuit with a minimum explosion protection of EEx ib

    Options
    Customer-specific solutions
    Specific designs for interface layer detection Δ-ρ ≥ 50 kg / m3
    Process connection, guide tube material and float made of stainless steel 1.4435, 1.4539, titanium, Hastelloy (others on request)

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