Intek 100CS with CE Marking - 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.
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 model 100CS flow switch consists of an explosion-proof electronics enclosure mounted on the
sensor head. The explosion-proof enclosure houses the round P/C board on which the relay and
electrical interface connector are mounted. Intek also has other switch models where the sensor and
electronics are separate units, for high temperature fluids or other conditions. In addition, a two relay
flow switch is available for indicating high and low flow conditions.
Key features of Rheotherm flow switches are:
• Non-intrusive flow monitoring — For pipe sizes from .030 to ¾ 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 joints or seals in a TU type transducer. Where
necessary, the probe type transducers have no joints formed by dissimilar metals.
• Fluid pressure options to several thousand 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.
• Range of application includes flow monitoring in capillary tubes to large diameter pipes or
ducts.
The model 100CS is the simplest Rheotherm flow instrument, meant for low temperature applications.
Intek, Inc. also has flow switches (Model 100FS) for high temperature liquids and gases (up to 850°F)
and other extraordinary process conditions.
1.2 DESCRIPTION OF OPERATION