Kobold DPM Rotating Vane Flow Meter

 The KOBOLD model DPM flowmeters are used for  measuring and monitoring liquids. Due to its compact construction the measuring instrument is suitable for use with machines with minimum available space. The system can be used in a wide variety of applications because the output pulses can be analysed in many different ways.

Areas of Application

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

Measuring range: 0.015 - 0.3 ... 0.05 - 5 l/min water
Connection: G ⅛, G ¼, ⅛" NPT, ¼" NPT
Material: brass nickle plated, stainless steel
p_max: 16 bar
t_max: 80°C
Accuracy: ±1 (±2.5) % of full scale
Pulse output

Measuring range: 0.015 - 0.3 ... 0.05 - 5 l/min water
Connection: G ⅛, G ¼, ⅛" NPT, ¼" NPT
Material: brass nickle plated, stainless steel
p_max: 16 bar
t_max: 80°C
Accuracy: ±1 (±2.5) % of full scale
Analogue output

Measuring range: 0.015 - 0.3 ... 0.05 - 5 l/min water
Connection: G ⅛, G ¼, ⅛" NPT, ¼" NPT
Material: brass nickle plated, stainless steel
p_max: 16 bar
t_max: 80°C
Accuracy: ±1 (±2.5) % of full scale
Analogue output, digital indicator

Measuring range: 0.015 - 0.3 ... 0.05 - 5 l/min water
Connection: G ⅛, G ¼, ⅛" NPT, ¼" NPT
Material: brass nickle plated, stainless steel
p_max: 16 bar
t_max: 80°C
Accuracy: ±1 (±2.5) % of full scale
Pulse output, analogue output, contacts,
digital / pointer indicator

Measuring range: 0.015 - 0.3 ... 0.05 - 5 l/min water
Connection: G ⅛, G ¼, ⅛" NPT, ¼" NPT
Material: brass nickle plated, stainless steel
p_max: 16 bar
t_max: 80°C
Accuracy: ±1 (±2.5) % of full scale
Analogue output, contacts NPN / PNP, digital indicator

Measuring range: 0.015 - 0.3 ... 0.05 - 5 l/min water
Connection: G ⅛, G ¼, ⅛" NPT, ¼" NPT
Material: brass nickle plated, stainless steel
p_max: 16 bar
t_max: 80°C
Accuracy: ±1 (±2.5) % of full scale
Analogue output, totaliser, contacts, digital indicator

Specifications

Technical Details

• Accuracy:
  DPM..000, F300: ± 2.5% of full scale
  DPM...F390,
  DPM...L, DPM..C: ± 1% of full scale
• Linearity: 1% of full scale
• Repeatability: 0.5%
• Medium temperature: -40...+80°C
• Ambient temperature: -30...+60°C
• Max. operating pressure: 16 bar
• Protection: IP 65

Materials

• Housing: brass nickel-platedstainless steel 1.4404
• Upper part: brass nickel-plated stainless steel 1.4404
• Union nut: brass nickel-plated or stainless steel 1.4305
• Orifice: 1.4404
• Axle: sapphire
• Rotating vane: polypropylene
• Vane mount: polysulfone
• Gasket: NBR (standard), FPM or EPDM (optional)

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.

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, set at the factory
• 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

Download Datasheet: Kobold DPM Rotating Vane Flowmeters

Reference : kobold.com