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Innovative High Temperature Fiber Optic Infrared Pyrometers
Product Description
3
2. Product Description
These Endurance
®
series pyrometers with an external, via fiber optic cable, attached sensor
head are infrared noncontact temperature measurement systems. Such devices have a fixed
focus, a laser beam pointing capability through the lens to the target, and different fiber optic
cable types for specific wavelength infrared temperature measurements. The Endurance
®
devices come in an industrial aluminum die-cast electronics enclosure. A ruggedized fiber
optic cable for the external sensor head attachment to the electronics enclosure is protected
by a flexible stainless steel sheath. The external attached sensor head on the one hand and
the electronics enclosure on the other hand, allow the installation of the electronics enclosure
away from a hot, hostile environment. They are energy transducers, designed to measure
accurately and repeatedly the amount of heat energy emitted from an object, and then
convert that energy into a measurable electrical signal. Each model operates as an integrated
temperature measurement subsystem consisting of optical elements, spectral filters,
detectors, digital electronics and an IP65 (NEMA-4) rated housing. Each is built to operate on
a 100 percent duty cycle in industrial environments. Various output types are offered for easy
integration into industrial monitoring and control environments.
Endurance
®
series pyrometers are available for different kind of temperature measurement
applications and are separated into the following variants:
Table 2: Fiber optic head models and their assigned sensor spectral range
Model Description
EF1ML, EF1MM, EF1MH
-Monochrome (1-Color)-
1-C-sensor in spectral range of 1.0 µm for different
temperature ranges
EF2ML, EF2MH
-Monochrome (1-Color)-
1-C-sensor in spectral range of 1.6 µm for different
temperature ranges
EF1RL, EF1RM, EF1RH
-Ratio (2-Color)-
2-C-sensor in spectral range of 1.0 µm (nominal) for
different temperature ranges
EF2RL, EF2RH
-Ratio (2-Color)-
2-C-sensor in spectral range of 1.6 µm (nominal) for
different temperature ranges
Monochrome (1-Color mode) types for standard temperature measurement applications
The 1-Color mode is best for measuring the temperature of targets in areas where no sighting
obstructions, either solid or gaseous, exist. Such 1-Color mode is also best where the target
completely fills the measurement spot.
Ratio (2-Color mode) types for specific temperature measurement applications
Such pyrometers determine the object temperature by the ratio of two separate and overlapping
infrared bands. The 2-Color mode is best for measuring the temperature of targets that are
partially obscured, either intermittently or permanently by other objects, openings, screens, or
viewing windows that reduce energy, and by dirt, smoke, or steam in the atmosphere. Possible
emissivity alterations should affect both detector wavelengths in an identical manner.
Unfortunately is such identical influence on both detectors in general use not verifiable.
The 2-Color mode can also be used on targets that do not completely fill the measurement spot,
provided the background is much cooler than the target. Ratio pyrometer types are able to
measure and determine the object temperature in either one of both modes (1-Color / 2-Color),
in which always 2 infrared detectors are active.