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 The
Thermal Flow Switch Monitor Aysix CF line is based on the principle
of thermal dispersion. A typical configuration uses two platinum
resistance Temperature Detectors (RTD's) set within the tip
of the sensor. One RTD is heated a few degrees above the temperature
of the medium and the other RTD is used as a reference, sensing
the actual process temperature. The second RTD also monitors
the temperature of the medium, as any changes in temperature
must be compensated for in the first RTD. As the process medium
flows over the tip of the sensor it disperses some of the heat
from the first RTD. The temperature change between the two RTDs
signals the probe's electronics and the switch changes state
once the set point has been reached. For the CF 420 Thermal
Flow Switch Monitor, the microprocessor-based electronics constantly
updates and reviews the signals received, in return putting
out a 4-20mA analog output signal, which is proportional to
the flow rate.
Thermal Flow Switch Monitor
Models:
- CF
12AC
- CF
12DC
- CF
420
- F
420 - RCF
420
Thermal Flow Switch Monitor
Introduction:
The
Aysix versatile and intelligent line of Thermal Dispersion Flow
Switch Monitors are compact switches, with no moving parts,
that can monitor and control the flow of liquid, air, and gas
in pipes and ducts. They can also be used for single point level
control of liquid or for interface detection between mediums.
Sitron's series of flow switches are available in five different
models that provide for different power supply, output, environmental
and connection requirements.
Thermal Flow Switch Monitor
Features:
- Simple
to install & low in cost
- No
moving parts-maintenance free reliability
- Optimal
temperature compensation - unaffected by temperature gradient
- Can
operate in temperatures up to 248ºF (120ºC)
- Have
a maximum working pressure of 4500 PSI (300 bar).
- Choice
of output signal
- Chain
of 8 LED's-Integrated flow rate/set point indication
- Fast
response time for flow or level (Adjustable from 1-10 seconds)
- Excellent
low flow sensitivity
- Can
be coated for aggressive mediums
- Insensitive
to dirt and most particles
- Available
in EX-Proof version
- Available
in threaded, flange, sanitary and adjustable insertion length
connections
 Thermal
Flow Switch Monitor CF 12AC:
The Aysix CF 12AC is a Thermal Flow Switch Monitor designed
to monitor flow status and also used to detect level of liquids,
air and gas. A chain of 8 LED's gives the user a visual indication
of the flow rate. In addition, there is also a di-chromatic
LED, which shows the switch point status of the unit. The sensing
element and connection of the CF 12AC is made with 316 S.S.
and the enclosure is glass filled nylon. The CF 12AC can be
made with a great variety of process connections such as threaded,
flange, or sanitary and can be coated when necessary.
This model is also available in an Explosion Proof (EX) version
with an aluminum enclosure, designed to detect flow and level
of liquids and gas in hazardous environments.
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