Netherlands 07077 03815 | Intl +31 (0) 7077 03815 | Welcome to our new website, found an issue or bug? Please report it here
BLMI
Mineral Insulated Metal Sheath Thermocouple Probes with Bare Leads
Product Overview
- Cable Length 0.7 in
- Cold Junction Compensation, Max 175 °C
- Color Code Standard ANSI
- Electrical Connection Wire Leads
- Probe Type Mineral Insulated Metal Sheath Thermocouple Probes
- Process Temperature, Min 0 °C
- Series ID BLMI
- Temperature Probe Style Immersion Probe
- Temperature Sensor Type Thermocouple
Supported Applications
The Omega BLMI Series consists of Mineral Insulated Metal Sheath Thermocouple Probes with bare leads, designed for temperature measurement in industrial processes. These probes utilize high-purity magnesium oxide insulation and SLE-class materials to meet or exceed ANSI/ASTM-E-230, ASTM-E-608, and BS/EN 61515 standards.
Operating Conditions & Performance
The series supports multiple thermocouple calibrations with specific upper temperature guidelines based on sheath material and diameter. Standard epoxy-sealed cold ends are rated to 175°C (350°F), while high-temperature versions feature ceramic cement cold ends rated to 1204°C (2200°F). Measurement ranges documented in the specification table include:
- J Calibration: 260°C (500°F) to 721°C (1330°F)
- K Calibration: 899°C (1650°F) to 1204°C (2200°F)
- T Calibration: 316°C (600°F) to 371°C (700°F)
Probes are subjected to a leak test at the welded thermocouple junction with pressurization greater than 2.5 MPa (362 psi). To pass insulation resistance tests according to ASTM specs, probes must achieve at least a 1 GΩ reading.
Configuration Options
The BLMI series is configurable across sheath materials, diameters, junction types, and lengths. Probes feature bare leads measuring 19 mm (¾"). Available configurations include:
- Sheath Materials: 304 SS, 310 SS, 316 SS, Inconel® 600, Super OMEGACLAD® XL
- Diameters: 1/16" (1.59 mm) to 1/4" (6.35 mm)
- Junction Types: Grounded, Exposed, Ungrounded
- Cold-End Seals: Epoxy or Ceramic Cement
- Lengths: Standard lengths of 150 mm (6"), 300 mm (12"), and 450 mm (18"); custom lengths available for probes over 12" upon consultation with Sales.
- Dual Element Option: Add suffix "-DUAL" to model number
Accessories include ceramic terminal blocks, compensated spade lugs, TX93A ultra-miniature transmitters, fiberglass sleeving (up to 480°C / 900°F), and BRK and SSLK compression fittings.
Key Product Differences
The series distinguishes between standard epoxy-sealed probes for lower temperature applications and high-temperature versions with ceramic cement cold ends. Model numbers follow the format BLMI-<Sheath Material>-<Calibration>-<Sheath Diameter>-<Junction Type>-<Probe Length>. For example, a mineral-insulated grounded probe with 316 SS sheath and 24" length is designated BLMI-XL-K-316-G-24. Junction types are specified by suffix: (G)rounded, (E)xposed, or (U)ngrounded.
