Intek 100CS with CE Marking User Manual
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I:\OFFICE\Web Site\distiller pdf\100CSCE.wpd
The Rheotherm Model 100CS flow switch uses a thermal sensing technique. Two temperature sensors
are used — one is in thermal equilibrium with the fluid and provides a fluid temperature reference, while
the second temperature sensor is located near a heater so that its temperature is slightly above that of
the fluid. In a TU transducer, the temperature sensors and heater are attached to the outside of the flow
tube, whereas the probe type transducers have sensors and heater located in the probes which are
inserted into the stream. The amount of heat removed from the heated sensor by the stream is related
to fluid velocity. Hence, the measured temperature differential between the reference sensor and heated
sensor is a function of flow rate. Only Intek, Inc. is licensed to use this patented and trademarked
method for precision flow measurement.
Non-intrusive transducer
Example of
Example of
(TU)
probe with
probe with
NPT fitting
flange fitting
1.3 PRECAUTIONS
1.
Use proper input power — Check the label on the unit for the input power requirements.
2.
Use reasonable care in handling the flow switch. Do not try to disassemble the transducer;
there are no removable parts.
TU — Excessive twisting or bending can damage the sensor. The flow tubes are thin-walled
tubing. Handle by the sensor body or electronics box to prevent tube damage.
Probes (NPT/2I, NPT/I, BF/2I, BF/I, etc.) — Take care not to bend the probes or damage the
tips. Do not try to remove or turn the electronics box.
3.
Check the flow switch maximum temperature rating — Do not operate a transducer at or
subject it to a temperature above its specified limit.
4.
Keep moisture out of the electronic enclosure. Once cable connections are made in the
electronic box, make sure the lid is tightly closed. Seal conduit lines if they can become wet
inside.
5.
Keep transducer wetted surfaces clean and free of permanent layer build-up.
6.
Do not exceed pressure limits specified on tag of the probe, tube or fittings.
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