FS 100 Series

FS-100 is a spring balanced displacer type level switch.
The pressurized part and electric part are perfectly isolated by magnet coupling system to offer much more safety and durability compared to other mechanical sealing types.
FS-100 can meet tough application with high temperature and high pressure.
Hermetical seal switch is newly added for heavy duty applications.
Very small flow rate can be covered:  Min. 0 - 0.5 L/h [Water] can be measured.  
 Alarm output option available:    In addition to local indication type, alarm output version is also available.
 Compact design:   Easy installation onto instrument panel.
 Safety for high temperature and pressure: All metallic material construction covers tough applications!


Measuring theory By spring balanced displacer
Measuring object All types of liquids (Viscosity: Max. 600 mPa·s. Liquid without sticking, crystallization, or freezing)
Level measurement: Density 0.45 g/cm³or more
Interface measurement: Density difference of 0.2 g/cm3or more
*Number of points for alarm: 1 point
Pressure range Full vacuum to 4.9 MPa
Temperature range -60 to 350℃
(Upto -196°C on request. Consult factory for details)
Process connection
Tank top: 3" flanges (4" for low density)
Tank side chamber: 1" flange
(1) Water tight construction: equiv. to IP 65
(2) Flameproof construction: Ex d IIC T6
(CENELEC certified available)
(3) Intrinsically safe construction: Ex ia IIC T6
(EB3C intrinsically safe relay barrier is to be used.)
Liquid and vapor contact part:SUS304, SUS316
Displacer: SUS304, SUS316, SUS316L (Option:MA276, TP35, Monel)
Flange: Carbon steel, SUS304, SUS316, SUS316L
Packing: PTFE, Vortex gasket
Housing: Aluminum alloy
Other material on request
Alarm contacts
Number of point Max. 4 points
Applicable alarm of interface detection is 1 point
Type of switch
Std.: 1 x SPDT Microswitch
Option: 2 x SPDT Microswitch
Hermetically sealed microswitch
Accuracy ・Accuracy: ±10mm (Density 1.0g/cm3)
・Repeatability: ±5mm (Density 1.0g/cm3)
・Reset span: Max.40mm (Density 1.0g/cm3)
*For level detection with water (AMB, ATM).