• Flow range:
    • (0.25 to 6,300 L/s) to (0.4 to 49,000 L/s)
  • Flow velocity range: 0.3 to 10 m/s
  • Material: stainless steel
  • Viscosity range: low viscous
  • Linearity: ±1.5% with well established flow profile
  • Pressure max: 80 bar
  • Temp max: 392°F (200°C)
  • Repeatability: ±1% of f.s.

The Kobold DOR Series Paddle Wheel Flow Meter is a very cost effective instrument for accurately measuring the flow of water or water-like liquids in large pipes.

The sensor is inserted into the process piping via a thread-olet or half nipple fitting. Liquid flow through the pipe results in rotation of the affixed paddle wheel. The rotational speed of the paddle is proportional to the flow velocity, and therefore, proportional to the flowrate in the pipe.

The insertion type design provides a measuring technique that is much less expensive than full bore flowmeters, especially in larger pipe sizes. Insertion paddle wheel sensors are a robust measuring technology that boasts exceptional tolerance to dirt and solids.

The DOR series features an all 316 L stainless steel body. The rotor is made of PVDF or PEEK, with a long-life, graphite/ PTFE self-lubricating bearing. The DOR has an integral, precision insertion mechanism that allows the installer to insert the rotor to the precise depth in the pipe for optimal readings.

Outputs include NPN open collector frequency, and/or reed contact frequency or millivolt frequency. Optional indicators include battery powered totalizers, loop powered ratemeter/totalizers and batch controllers.

The DOR-5 is suitable for "hot tap" installation. With its symmetrical design the DOR may be used for bi-directional flow measurement.

Applications include:

  • HVAC: Hot and Chilled water, Fire system and thermal energy monitoring
  • Municipal: Water distribution, water management and water treatment
  • Irrigation: Water management
  • Water treatment: Chlorination, de-salination and mechani-cal filtration plants, chemical injection systems
  • Refi neries: Primary fl ow additive injection, fire and cooling systems
  • Power generation: Boiler feed water, steam condensate, process water and water balancing
  • Chemical: Process & cooling tower water, chemical and water batching
  • Others: Cement manufacturing, diesel fuel transferring, flow testing, fi re truck and hydrant fl ow monitoring, food processing, pulp/paper, mining