Kobold DPL Rotating Vane Flow Meter

Kobold DPL Rotating Vane Flow Meter are used to measure and monitor liquids. Its compact design allows it to be used in equipment where space is at a premium. The large number of pulse evaluation options offered means that the system is suited for a wide range of applications.

Kobold DPL Rotating Vane Flow Meter

Kobold DPL Areas of Application

Low viscosity liquids
Non-conductive liquids
Volume dosing with external electronics
Filter aid
Beverage industry

Technical Details

Accuracy:
± 2,5% of full scale
± 5% of full scale (OEM version)
Linearity: 1% of full scale
Medium temperature: -40...+70°C
Ambient temperature: -30...+60°C
Max. operating pressure:10 bar
Protection: IP 65

Kobold DPL Materials

Housing: polypropylene
Rotating vane: polypropylene
Axle/bearing: sapphire
Vane mount: polysulfone
Gasket: NBR, FPM or EPDM

Operating Principles

The medium flows through a specially shaped flow housing and causes a vane to rotate. This rotary motion is sensed by optoelectronics in a non-contacting manner, and converted to an asymmetric frequency signal or an analogue signal. A frequency divider with symmetrical output is available as an option. The frequency is proportional to the flow velocity. The vane is sapphire-supported: this ensures a high degree of linearity and long service life.

Kobold DPL Electronics

Frequency output (OEM without CE-Sign)

Power supply: 4.5 - 12 VDC
Supply current: typ. 7 mA
Signal amplitude high: approx. power supply
Signal amplitude low: ≤0.2 V
Transmitter cut-off voltage: 3 V max.
Transmitter supply current: 8 - 12 mA
Output loss: max. 2.5 mWatt
Electrical connection: solder pins
Pulse output: NPN, Open Collect., max.10 mA

Frequency output (option frequency divider)

Power supply: 24 VDC ±20%
Supply current: 40 - 50 mA
Signal amplitude high: approx. power supply
Signal amplitude low: ≤0.2 V
Output loss: max. 2.5 mWatt
Electrical connection: plug M12x1 (option: 2 m PVC cable)
Division ratio (option): 1...1⁄128 factory set
Pulse output: PNP, open collector, max. 20 mA

Analogue output (option plug-on display)

Power supply: 24 VDC ±20%
Output: 0-20 mA or 4-20 mA, 3-wire technology
Max. load: 500 Ω
Electrical connection: plug connector M12x1 or DIN 43 650
Option: plug-on display (with plug connector DIN 43 650 only)

Compact electronics

Display: 3-position LED
Analogue output: (0)4...20 mA adjustable, max. 500 Ω
Switching outputs: 1 (2) semiconductor PNP or NPN, factory set
Contact operation: programmable N/C/ N/O contact
Setting: via 2 buttons
Power supply: 24 VDC ±20%, approx. 100 mA, 3-wire technology
Electrical connection: plug connector M12x1

Pulse Output DPL-..F5

Measuring range: 0.025 - 0.5 ... 1 - 25 l/min water
Connection: G ½ male thread or hose connector
Material: polypropylene
p_max: 10 bar
t_max: 70°C
Linearity: ±1 %
Pulse output, frequency divider