KSM Kobold Variable Area Flowmeters and Switches-Plastic

The KOBOLD plastic flowmeters of model KSM are based on the float principle with the float moving freely without friction in the measuring tube. From nominal size DN65, the devices are provided with a guide rod to stabilize the floats. The indication point is at the greatest diameter of the float. The standard flowmeters are supplied with a scale for water (+20°C), a percentage scale, O-rings, two setpoint indicators, and a guide rail for accessories.

The measuring tube is available in polysulfone (KSM2...) for less aggressive media or in Trogamide (model KSM-1...) for simple water or air applications. The materials are resistant to impact, bending, and compressive stresses. Optional threaded fittings can be fitted on the external threads integrally extruded at the ends. The floats are supplied with integrated magnets for operation with a bistable reed contact.

Measuring/switching range:
15 - 150 ... 8000 - 60 000 l/h water
0.8 - 5 ... 300 - 2500 m³/hair (0 barrel, 20°C)
Connection: ½" ... 3½"
Material: trogamide-T, polysulfone
pmax: 16 bar
tmax: 60°C (trogamide), 100°C (polysulfone)
Accuracy: Cl. 4 according to VDI
Option: Reed contact

Features :

Special advantages :

  • Rugged and corrosion resistant
  • Special scales can be attached
  • Guide rails for limit switches (can also be retrofitted, only replacement of the float is necessary).
  • Nominal sizes, measuring range, and measuring tube material are all marked on the measuring tube.

Applications :

  • Cooling circuits
  • Water treatment
  • Plant engineering

Specifications :

Technical Details :


KSM-1...: Trogamide-T
KSM-2...: Polysulfone


See table Order Details of datasheet



Guide rod:

PVDF stainless steel for the 3 largest sizes


EPDM (KSM-1... / KSM-2...)

Max. temperature:

KSM-1...: 0-60°C
KSM-2...: 0-100°C
With contact max. 85°C

Max. pressure:

KSM-x0xx, KSM-x1xx: 16 bar KSM-x201, KSM-x301, KSM-x601: PN10


±4% of a full scale



Download Datasheet: KSM Kobold Variable Area Flowmeters and Switches-Plastic

Reference: kobold.com

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