KOBOLD KFF/KFG Rotating Vane Low Volume Flow meter

KOBOLD KFF/KFG Rotating Vane-Low Volume are used for measuring low and smaller, volumetric flow rates of gases (KFG) and liquids (KFF). The media must be transmissive for infrared light.

KOBOLD KFF/KFG Rotating Vane Low Volume Flow meter

Series KFF/KFG 1000 flowmeters are available in Ryton®, brass and PTFE materials; therefore suitable for many applications in industry, in laboratories, and so forth. The new PTFE sensor of the 1000 series is delivered as standard with (0 ... 5 VDC) analogue output and frequency output. The frequency output is optional on other models. Series KFF/KFG 3000 flowmeters are available in Ryton® and in brass.

 

 

Rotating Vane-Low Volume KFF-1, KFG-1

 

Measuring Range:

• 15 - 100 ml/min ... 1 - 10 l/min water
• 25 - 100 ml/min ... 100 - 500 l/min air

Connection: G ⅛  ... G ½
Material: brass, Ryton^®, PTFE
p_max: 35 bar
t_max: 50°C
Accuracy: ±3 % of full scale
Viscosity range: low viscosity
Pulse output, 0 - 5 V_DC

 

 

Rotating Vane-Low Volume KFF-3, KFG-3

 

Measuring range:

• 15 - 100 ml/min ... 1 - 10 l/min water
• 25 - 100 ml/min ... 100 - 500 l/min air

Connection: G ⅛ ... G ½
Material: PPS, brass, PTFE
p_max: 35 bar
t_max: 50°C
Accuracy: ±3 % of full scale
Viscosity range: low viscosity Digital display, 0 - 5 V_DC

KOBOLD KFF/KFG Function Principle

The flowmeter is based on the Pelton Principle, that is, the flowing medium causes a vane to rotate. The rotary motion is converted to electrical impulses by means of photodiodes. The flow rate is output as a frequency signal or a linear analogue (0...5 VDC).

KOBOLD KFF/KFG Specifications

Technical Data

• Accuracy: ± 3 % f. s.
• Linearity: ± 3 % f. s.
• Repeatability:
  KFF: ± 0.2 % f. s.
  KFG: ± 1% f. s.
• Installation position: horizontal
• Temperature range: 0...50°C
• Temperature drift: 0.2%/ °C
• Max. pressure:
  KFF:
  Ryton®: 7 bar
  Brass: 35 bar
  PTFE: 4 bar
  KFG: 2.5 bar
• Supply voltage: 12.5 VDC ± 2 VDC
  PTFE version: 12.5 VDC ± 1 VDC
• Current consumption: 50 mA (typically)
• Output:
  KFF-1../KFG-1..:
  Standard: 0...5 VDC
  Option T
  (KFF-1.. only): 0...5 VDC and frequency output
  PTFE version: 0...5 VDC and frequency output
• Max. frequency: 500 Hz
• KFF-3../KFG-3..: 0...5 VDC

Material

Version	Ryton®	Brass	PTFE
Housing	60% Ryton®/ 40% glass	Brass/grass	PTFE
Turbine	60% Ryton®/ 40% glass	60% Ryton®/ 40% glass	PTFE
Bearings	Sapphire	Sapphire	Sapphire
Bearing Shell	St. steel (316)	St.steel (316)	PTFE
Gasket	FPM	FPM	Kalrez®
Connection	Acetal	Brass	PFA

 

Download Datasheet: Kobold Rotating Vane-Low Volume

Reference : kobold.com