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Float type level meters

FPL series
FPL series
Float type level meter made of resin that can be used with corrosive liquids and various liquid chemicals

This float sensor is very corrosion-resistant, and ideal for measuring corrosive liquids and liquid chemicals, etc.
Can measure levels stably even in harsh conditions. Respond to changes in the electrical characteristic of the material to be measured.

  • For liquid

A variety of coupling types are provided, including standard flange, ferrule connection, and screw-in connection types.


Features, keys

  1. Very corrosion-proof
    Resins (PVC, PP, etc.), that offer high resistance to corrosion, are used as material for the sensors. Can measure various liquid chemicals.
  2. Can measure a wide range of materials
    Not affected by electrical characteristic changes of the materials to be measured. It is not affected by temperature, pressure, or gas in the tank.
  3. Safe design that endures harsh tank conditions
    Water-proof housings (protection class IP65).
  4. Simple measurement settings
    Simple initial settings (press buttons) for measurement. A small non-sensing area makes measurements possible over a wide range.
  5. Many functions for safety measurement as standard
    A delay setting function and watch dog function come as standard.

Usages, use examples

  • Level measurement of corrosive liquids and various liquid chemicals.

Standard specifications


Power source required 20 to 250 V AC/DC
Power consumption 2.0 VA or less
Ambient operating temperature -10 to +60 degrees
Current output 4 to 20mA DC (maximum load resistance: 500Ω or less)
4.0mA output at 0% of registered value
20.0mA output at 100% of registered value
Response speed Approx. 0.5sec to 180sec adjustable
Data output (optional) Conform to RS485


Connection Dimensional standard *1 JIS5K50A FF
(Can be altered on request)
Materials PVC
Float Outside diameter Φ48xH50
Materials PP
Specific gravity of measurable liquids 0.65 or more
Stem Outside diameter Φ22mm
Materials PVC
Length Maximum 2000mm *2
Others Detection interval Maximum 8mm
Non-sensing zone When specific gravity is 1.0, 60mm at stem tip and 20mm at the case
Operating temperature: -10 to +50 degrees
Operating pressure 0.2MPa *3
Protection level IP68
Painted color Dark blue equivalent to Munsell 5PB3/8

*1: Can be altered if required.The model name may be changed depending changes in the details.
*2: It may become shorter with each measuring condition. Contact our staff for the actual maximum dimension.
*3: If the withstand pressure of the liquid contact areas is lower than this value, the withstand pressure of the liquid contacting area shall be applied.

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