LumaSense Technologies M67 - Manual (Page 7)

M67, M67S Manual
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Depending on the physical distance between the object and the INFRADUCER, and on the physical environment in which the
INFRADUCER is located, a variety of designs and accessories are available to meet even the most stringent requirements.
3.3 The M67 product family
The M67 product line has two, configurations, the M67 and the M67S. The M67 is the basic infrared thermometer, operating
from the industry standard, 2 wire, 4-20 milliampere current loop. It is a self contained device providing all signal processing
necessary to confer the infrared energy to a linear output signal.
The M67S performs all of the above functions, but also contains precise, through the lens sighting. This is accomplished
through the use of spectrally selective beam splitters and lenses.
Illustrations in this manual describe the M67. Where operating differences are noted, views of the M67S are also provided.
Figure 1 - M67/M67S "Infraducer".
4. Theory of operation
4.1 Basic principles
Described below are the basic principles of physics, which are intended to help you understand the design and operation of the
INFRADUCER.
All materials, which are above 0 degrees Kelvin (-273 degrees C), emit infrared energy. The intensity of the emittance is a
function of the temperature of the material the higher the temperature, the greater the intensity. As well as emitting IR energy,
materials also reflect IR, absorb IR and, in some cases, transmit IR e.g. clear plastics, glass, etc. When the temperature of a
material equals that of its surroundings, the amount of thermal radiation absorbed by the body equals the amount emitted by the
body.