The
PNF is a non-contacting, non-invasive point level switch for high
or low level indication. It is highly reliable, rugged and provides
cost-effective on-off control of circuits. It is mounted externally
on tanks, bins, hoppers, pipes, chutes or other vessels to sense
the level of liquids, slurries, and solids
The TN PNF provides non-contacting Point Level indication in different
applications. The TN PNF consists of two components: an energy
source in a steel-jacketed housing and the detector/electronics.
It operates on the principle of gamma ray attenuation. The gamma
energy source emits a narrow beam of energy which passes through
the vessel walls to the detector. When process material is in
the beam path, the energy is attenuated and not all of it reaches
the detector. If the process material is not in the beam path,
the detector receives and unattenuated amount of energy. The amount
of energy at the detector is "counted" by the electronics.
As the count rate falls below (for high level) or goes above (for
low level) a predetermined reference, the output relay is energized.
Features and Benefits:
