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Mineral-Insulated Metal Sheathed
Thermocouple Probes
Bare Leads Mineral-Insulated Cable
Available as
BLMI Series
Cold-End Option
19 mm
(0.7")
BLMI probes are also available in a high-temperature
version. The cold end is potted using a ceramic cement
rated to 1200°C (2200°F). Add “-CC” to the end of the
probe model number for an additional cost. (The actual
temperature rating of the probe is dependent upon the
calibration, sheath material, and probe diameter.)
Epoxy sealed “cold end”,
rated to 175°C (350°F).
Bare 19 mm (3⁄4") leads.
Shown
actual
size.
BLMI Probes Deliver Consistent, Superior
Quality Through Automated Manufacturing
Thermocouple users demand products able to deliver
accurate measurements over long lifetimes. They
also want proven track records from the probes they
buy. With OMEGA’s automated manufacturing and
testing systems, these customers can be assured of
consistently high-quality products, and the ability to
track the manufacturing process and retrieve the initial
calibration values and material sources.
OMEGA’s bare leads MI (BLMI) finished probes begin
with OMEGA’s own high-purity magnesium oxide
thermocouple cable. This mineral-insulated, metalsheathed cable uses SLE-class materials throughout
its construction.
BLMI-XL-14U-12 shown
smaller than actual size.
“DUAL”Construction
Also available in
a 4-wire construction
(2 thermocouple junctions).
Add “–DUAL“ to the end
of the model number for an
additional cost. Consult Sales
for probe lenghts over 12".
For some applications, such as ceramic kilns, BLMI
probes combined with the accessories shown on these
pages offer expedient and accurate temperature solutions
to 1204°C (2200°F) with XL probes. BLMI probes meet
and exceed the rigorous standards for thermocouples,
including ANSI/ASTM-E-230, ASTM-E-608, and the
British/European BS/EN 61515 standard. The combined
BLMI probe with Super OMEGACLAD® XL sheathing
produces superior measurement results.
OMEGA’s BLMI Series probes are built and quality
tested on our automated manufacturing lines.
OMEGACLAD® mineral-insulated, metal-sheathed
thermocouple cable is cut, stripped, beaded, closed,
potted, and tested by equipment designed and built
in-house exclusively for these tasks.
Programmable controller-based automation used in
manufacturing BLMI probes ensures the same high
quality from lot to lot—from cutting to final test. After
final QA tests for insulation resistance and weld and
seal leakage [nitrogen pressure test at 2.5 MPa
(362 psi)], OMEGA assigns identification codes to
each device, which can be used to track products
through the entire manufacturing process.
To pass the IR test according to ASTM specs, OMEGA’s
BLMI probes must achieve at least a 1 GΩ reading. The
unit under test scored 50 GΩ.
Probes are subjected to a leak test at the welded
thermocouple junction (hot end) with a pressurization
greater than 2.5 MPa (362 psi).
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A
Grounded Exposed Ungrounded
BRLK and SSLK
compression
fittings. Visit us
online.
Junction Types
Grounded
Exposed
Ungrounded
U J, K, T, Calibrations in Stock—
Also Available in E and N
®
U 304 SS, 310 SS, 316 SS, Inconel
600,
and Super OMEGACLAD® XL Sheaths
U Exposed, Grounded, and Ungrounded
Hot Junctions
U Exposed 19 mm (0.7") Bare Conductors
U Epoxy or Ceramic Cement Cold-End Seal
U Standard Lengths, 150 or 300 mm
(6 or 12")—Custom Lengths Available
U Vast Selection of Termination
Accessories—See Window to the Right
U Metric Diameters and Lengths
Available—Contact Sales for Details
Super OMEGACLAD®
XL “BLMI” probes used
in ceramic kiln firing
applications. For more
information on Super
OMEGACLAD® XL probes,
visit us online.
Accessories
Ceramic terminal blocks.
Compensated
spade lugs.
TX93A, ultra
miniature
transmitters.
Fiberglass sleeving
for insulating bare wire
up to 480°C (900°F).
Discount Schedule
1 to 10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Net
11 to 24 ...............................10%
25 to 49 ...............................20%
50 to 99 ...............................25%
100 and over .................. Consult Sales
To Order
Calibration Sheath Sheath Dia. Guidelines °C (°F)
ANSI Color Material mm (in) T/C Junction Model No.
304 SS
304 SS
304 SS
304 SS
INC 600
INC 600
INC 600
INC 600
XL
XL
XL
XL
304 SS
304 SS
304 SS
304 SS
304 SS
304 SS
304 SS
304 SS
Specify junction (G)rounded, (E)xposed, or (U)ngrounded.
*
Dual element also available, add suffix "-DUAL" to model number for additional cost.
Ordering Example: BLMI-XL-K-316-G-24, mineral-insulated grounded probe, 316 SS sheath, 24" length (304, 310, 316 SS also available).
1
⁄16 (1.59) 899 (1650) BLMI-304-K-116(*)-(**)
1
⁄8 (3.18) 899 (1650) BLMI-304-K-18(*)-(**)
3
⁄16 (4.78) 899 (1650) BLMI-304-K-316(*)-(**)
1
⁄4 (6.35) 899 (1650) BLMI-304-K-14(*)-(**)
1
⁄16 (1.59) 921 (1690) BLMI-INC-K-116(*)-(**)
1
⁄8 (3.18) 1071 (1960) BLMI-INC-K-18(*)-(**)
3
⁄16 (4.78) 1149 (2100) BLMI-INC-K-316(*)-(**)
1
⁄4 (6.35) 1149 (2100) BLMI-INC-K-14(*)-(**)
1
⁄16 (1.59) 1038 (1900) BLMI-XL-K-116(*)-(**)
1
⁄8 (3.18) 1149 (2100) BLMI-XL-K-18(*)-(**)
3
⁄16 (4.78) 1204 (2200) BLMI-XL-K-316(*)-(**)
1
⁄4 (6.35) 1204 (2200) BLMI-XL-K-14(*)-(**)
1
⁄16 (1.59) 441 (825) BLMI-304-J-116(*)-(**)
1
⁄8 (3.18) 521 (970) BLMI-304-J-18(*)-(**)
3
⁄16 (4.78) 621 (1150) BLMI-304-J-316(*)-(**)
1
⁄4 (6.35) 721 (1330) BLMI-304-J-14(*)-(**)
1
⁄16 (1.59) 260 (500) BLMI-304-T-116(*)-(**)
1
⁄8 (3.18) 316 (600) BLMI-304-T-18(*)-(**)
3
⁄16 (4.78) 371 (700) BLMI-304-T-316(*)-(**)
1
⁄4 (6.35) 371 (700) BLMI-304-T-14(*)-(**)
Upper Temperature
Probe length 6" (150 mm), 12" (300 mm), 18" (450 mm) are standard.
**
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