Multi-level Thermocouples
ARi can supply multiple element assemblies small enough to replace single point thermocouples. We also manufacture large multiple element assemblies which can replace expensive thermowells. It is now possible to insert a multilevel thermocouple assembly directly into a pressurized process chamber with minimum flow restriction and a response time that is measured in seconds. This fast response time will allow detection of abnormal process temperature conditions before damage can occur.
 Multiple
level temperature sensors have junctions spaced to provide continuous
temperature profiles.Sensing end of
thermocouple assembly may be formed or bent around offsets.Assemblies can
withstand external pressures as follows: |
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| 0.125"
-- 3000psig 0.500" -- 4000psig |
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| Assembly
sheath may be welded or brazed in place or installed with a single
compression fitting.Individual
thermocouple circuits may either be fully insulated from each other or
available with junctions grounded to inner sheaths for faster response
time.Assemblies can be
installed into existing thermowells or into fast response protection
tubes.A time constant of 3
seconds at 3 meters/second water velocity can be attained with a
0.125" diameter assembly.Multiple element
thermocouple assemblies are used to obtain continuous temperature data
at pre-selected points. Previous approaches required the installation of
several thermocouples into large thermowells.Up to 18 thermocouples
can be provided in a single 0.125" outer sheath.Contact us with any
special requirements you may have. |
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| Available
in the following calibration types: |
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| Calibration Type | Temp Range ºF. | Temp Range ºC. | ||
| J | -300 to 1000º | -184 to 540º | ||
| K | 32 to 1800º | 240 to 980º | ||
| E | -400 to 1800º | -240 to 980º | ||
Typical Multilevel Designs
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Other terminations are available. Please contact ARi for more information.