Low Flow Switch from PKP Process Instruments
PKP Process Instruments Inc.
January 14, 2009
The Model DS04 from PKP Process Instruments Inc., Hudson, MA, is suited for measuring and monitoring the flow of low-viscosity liquids and gases in applications such as monitoring equipment cooling loops on laser and plasma welding systems, pump monitoring/control, and alarm function for critical process flows. The sensor works on the variable area principal and uses a float guided in a cylindrical measuring tube by means of a slotted nozzle. One or two reed switches in a sealed housing are magnetically coupled to the float and are factory preset or field-adjustable over the range of the instrument. The switch is available in pipe sizes from 1/4 in. to 1 in. and F.S. ranges of 1.5 lpm to 50 lpm for water and 28 slpm to 240 slpm for air.
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