Intek 111D - Manual (Page 3)

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SECTION 1
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GENERAL INFORMATION
1.1 INTRODUCTION
Rheotherm ® precision flow meters are designed to provide accurate linear or non-linear (depending on
the model) representation of fluid flow rate. They are manufactured exclusively by Intek, Inc. and
employ a patented thermal technique used by industry since 1978. The unique transducers have
protected sensor design, are easy to install and require little or no maintenance.
Each
Rheotherm flow meter 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 four basic enclosure styles (SECTION 2.2). Again, selection is based on application
requirement.
Key features of
Rheotherm instruments are:
• Nonintrusive flow measurement — For pipe sizes from 0.030 to 1.5 inches, flow sensing can
be 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 joints or seals in most tube type transducers.
• 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 temperature options to 500°F.
• Fluid pressure options to 10,000 psi (check transducer tag for rating on your unit).
• Withstands over ranging — No damage or change in calibration will occur due to excessive
flow rates many times higher than calibration range.
• Immunity to shock and vibration.
• Optional nuclear radiation hardening.
• Range of application includes measurements in capillary tubes to large diameter pipes or
ducts.