Intek 100FS - Manual (Page 3)

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SECTION 1 ! GENERAL INFORMATION
1.1 INTRODUCTION
Rheotherm flow switches offer reliable flow switch protection in liquids, gases and slurries. They can
be used for flow/no flow detection, or specific low and/or high level alarms over a given 10 to 1 flow
range. They are manufactured exclusively by Intek, Inc. and employ a patented thermal technique used
by industry since 1978. The unique transducer designs have protected sensors, are easy to install and
require little or no maintenance.
Each Rheotherm 100FS flow switch consists of two elements a transducer and an electronics unit.
The transducers come in two basic designs, intrusive and nonintrusive (SECTION 2.1). Design selection
is based on application constraints or customer preference. The electronics, for signal processing, are
housed in one of two basic enclosure styles (SECTION 2.2). Again, selection is based on application
requirement.
Key features of Rheotherm flow switches and flow meters are:
Nonintrusive flow monitoring For pipe sizes from .030 to 1 inch, flow sensing is done from
outside the flow tube.
No moving parts There are no rotating, translating, undulating or oscillating parts to wear,
stick, break or fatigue.
Chemical compatibility The wetted surface(s) can be any of a number of corrosion resistant
metals or alloys. There are no internal seals in a TU type transducer. Most sensors are 316
SS or 316 SS and nickel braze.
Flexibility Rheotherm meters can be ordered calibrated for mass or volumetric units or in
average velocity. Flow rate, totalization and fluid temperature displays or output signals are
available as well as rangeability up to 100:1 or more.
Fluid pressure options to 10,000 psi.
Withstands over ranging No damage or change in operation will occur due to excessive
flow rates many times higher than originally specified.
Immunity to shock and vibration.
Optional nuclear radiation hardening.
Range of application includes measurements in capillary tubes to large diameter pipes or
ducts.