Kofloc FM31 Vortex Flow Meter for Liquids

Kofloc FM31 Vortex Flow Meter for Liquids the following principle for measurement of flows: When a columnar object (an object that generates vortices) is placed in the flow path of a fluid, regular channels of vortices, called Kar- man vortex channels, are generated at the back of the object. Since the frequency of a vortex generated is linearly proportional to the flow velocity within a given range, the flow amount can be measured by counting the number of vortices.

When the frequency of each vortex generated is detected by the incorporated vortex detector (piezoelectric device), the signal processing circuit outputs a signal that is linearly proportional to volume flow. KOFLOC strives for thorough quality control at domestic factories. In recent years, we have also been focusing on product development for liquid measurement and control equipment, and we will deliver products that can be trusted as “Fluid Kofloc” to the world.

Features

Because of no moving part, the meter has superior reliability and durability and no error in mounting position is produced.
Simple construction (its flow path of fluid contains a columnar object and a vortex detector only) ensures low pressure loss and low liquid leak. In addition, the detector does not get into contact with the fluid running through the path, therefore, it is ideal for process monitoring of various liquids.
Two types of particle-free body materials (PPS and PFA) are available for choice according to your needs.
Global specifications (Certification for CE Marking already acquired)
Since Teflon is the material for the entire wetted part and no O-ring is in use, the Model31 Series Karman Vortex Flow Meter is optimum for monitoring liquid flows in the manufacturing process of semiconductors.

Applications

FA instruments
Semiconductor manufacturing
LCD
Housing material production
Medicine production
Chemical industry
Biomedical applications
Environment systems
Food processing
Agricultural/Botanical applications

Specifications

Item		FM3101	FM3102	FM3103	FM3104
Flow range (L/min)		0.4-4	2-20	5-50	10-100
Connection		3/8” Pipe end	1/2” Pipe end	3/4” Pipe end	1” Pipe end
Fluids for measurement		Ultrapure water, chemicals, and other liquids
Measuring accuracy		±3.0%+ 1 digit
Repeatability		Within ±0.5% F.S.
Liquid temperature range		0-90℃ (No bedewing, no boiling)
Amb. temperature range		0-50℃
Outputs	With indicator	LED display in 3 digits
		Current output: 4-20 mA (linear)
		Alarm output: Open collector (2 LEDs; 80 mA, 30 VDC max.)
	W/o indicator	Current output: 4-20 mA (linear)
		Pulse output: Open collector (10 mA, 30 VDC max.)
Supply voltage		12-24VDC
Materials	Body	All Teflon® (PFA), without O-rings
	Cover	Polybutylene terephthalate (PBT) resin
	Cable	2 meters long; Conductor: Tinned bare annealed copper wire; Sheath: Heat-/cold-resistant polyvinyl chloride (POC)