Kobold Wheel Flowmeter, DZR
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DZR Gear Wheel Flowmeter

Brand: KOBOLD Instruments, Inc
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The KOBOLD Gear Wheel Flow Meter Series DZR have been designed for a flow measurement for viscous fluids. The measuring unit consists of a pair of gear wheels which is moved by the flow according to the principle of gear wheel motor. 

The bearings are according to the material combination either ball bearings or gliding bearings. 

The movement of the gears is sampled without contact by means of two sensors located in the cover. Between sensor compartment and measuring chamber is located a pressure-resistant, non-magnetic separator plate. 

The different versions vary through housing materials, bearing assembly, through the medium being used and the accuracy. The mounting position and flow direction is arbitrary.

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Specifications

Brand

Accuracy

  • ± 0.3 % for DZR-1 & DZR-6
  • ± 0.5 % for DZR-2, DZR-4 & DZR-5
  • ± 1 % for DZR-3

Ambient Temperature Range

  • 0° to 60° C (32° to 140° F)

Approvals & Certifications

  • ATEX - II 2 D Ex IA D 21 T125° C
  • ATEX - II 2 G Ex IA IIC T4
  • ATEX - M2 Ex IA I

Bearing Material

  • Bronze
  • Tungsten Carbide

BSP Connection

  • G 1” Female
  • G 1/2” Female
  • G 1/8” Female
  • G 3/8” Female

Circuit Protection

  • Short Circuit Proof

Consumption

  • 0.9 W - Power Consumption
  • 120 mA - Current Consumption

Differential Pressure

  • psi: 232.1 (kPa: 1,600, bar: 16) - Max.

Display

  • 4-Digit LED Display

Duty Cycle

  • ± 15 %

Electrical Connectors

  • DIN 43650
  • Plug Connection

Electrical Protection

  • Reverse Polarity

Enclosure, Body Material

  • 316L Stainless Steel
  • Speroidal Iron

Environmental Protection

  • IP65

Filter

  • 20 micron

Flow Rate

  • 0.008-2 to 3-700 L/minute

Materials of Construction

  • 5117 Stainless Steel - Gear Wheels
  • Cast Iron
  • F51 Stainless Steel - Gear Wheels

Maximum System Pressure

  • psi: 4,569 (kPa: 31,500, bar: 315) for DZR-x011 to DZR-x015
  • psi: 5,802 (kPa: 40,000, bar: 400) for DZR-x001 to DZR-x010 & DZR-017/-18

Output

  • 0 to 20 mA
  • 2 Pulse Output Signals, Rectangular
  • 250 ohms - Max.
  • 4-20 mA
  • 50 ohms (10 Vdc)

Output Format

  • Relay Output - 2 x Normally Open

Power Requirement

  • 0.3 W

Ratio

  • 1:1

Relay Output

  • 24 V / 1 A

Repeatability

  • < 0.1 % of Measured Value

Resolution

  • 62.5 to 40,000 Pulse/Litre

Seat / Seal Material

  • EPDM
  • FEP
  • FPM

Supply Voltage

  • 12 Vdc (± 20 %)
  • 24 Vdc (± 20 %)

Switch Type

  • PNP

Temperature Range

  • 0° to 80° C (32° to 176° F) - Fluid Temperature
  • Maximum

Documentation

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