Description
KOBOLD KFF/KFG Rotating Vane-Low Volume is used for measuring low and smaller, volumetric flow rates of gases (KFG) and liquids (KFF). The media must be transmissive for infrared light.
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) analog output and frequency output. The frequency output is optional on other models. Series KFF/KFG 3000 flowmeters are available in Ryton® and brass.
Specification
- 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
- pmax: 35 bar
- tmax: 50°C
- Accuracy: ±3 % of full scale
- Viscosity range: low viscosity
- Pulse output, 0 – 5 VDC
Specification
- 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
- pmax: 35 bar
- tmax: 50°C
- Accuracy: ±3 % of full scale
- Viscosity range: low viscosity Digital display, 0 – 5 VDC
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
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