Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Patent
1994-05-12
1995-10-17
Fields, Carolyn E.
Radiant energy
Invisible radiant energy responsive electric signalling
Infrared responsive
2503391, 25033911, 2503418, G01N 2135
Patent
active
054593182
ABSTRACT:
The present invention provides an apparatus and process for monitoring the moisture content of particulate material within a fluid bed apparatus such as a fluid bed granulator or fluid bed dryer. The apparatus comprising a probe with a conduit means for near infrared light wherein the end of the probe is positioned in the bowl of a fluid bed apparatus in a region of constant bulk density wherein said probe may be operably linked to a near infrared analyzer. A process for monitoring the moisture content of particulate material in a fluidized bed apparatus comprising irradiating a particulate material in a fluidized state with a constant bulk density with a near infrared light source, detecting the reflected near infrared light from the particulate material with a near infrared sensor and determining the moisture content by comparing the moisture content the sensor output with reference values for the moisture content for the particulate material and optionally adjusting the operating parameters of said fluidized bed apparatus in response to said moisture content.
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Cacho Miguel A.
Cheng Ka H.
Fields Carolyn E.
McNeil-PPC-Inc.
Plantz Bernard F.
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