KMQXL-NMQXL

Supported Applications

The Omega Super OMEGACLAD™ XL Thermocouple Probes are mineral insulated (MI) temperature sensors engineered for high-performance measurement in demanding environments. These probes offer resistance to carburization, oxidation, and chlorination, making them suitable for applications requiring long life and low drift at elevated temperatures.

Operating Conditions & Performance

The series is designed to handle process temperatures up to 1335°C (2400°F). Accuracy meets or exceeds Special Limits of Error (SLE) and EN 60584-2: Tolerance Class 1. The probes exhibit super stable temperature drift of less than 2.8°C (37°F) in 25 weeks.

Response times vary by sheath diameter, with approximate values for ungrounded probes tested in water:

• 0.25 sec** (0.8 mm)
• 0.3 sec** (1.6 mm)
• 0.55 sec** (3.2 mm)
• 2.25 sec** (6.4 mm)

A 0.8 mm (0.032") probe is documented to withstand 815°C (1500°F) for 3 years.

Configuration Options

The series supports K and N calibrations only, utilizing CHROMEGA™-ALOMEGA™ XL Sheath or OMEGA-P™-OMEGA-N™ XL Sheath materials. Probes are available in various styles including Quick-Connect, Transition Junction, Industrial Head, and Utility Handle configurations.

Sheath diameters span both imperial and metric dimensions:

• Inches: 0.010 in, 0.020 in, 0.032 in, 0.040 in, 0.062 in, 0.125 in (1/8), 1/16 in, 3/16 in, 1/4 in, 5/16 in, and 3/8 in.
• Millimeters: 1.5 mm, 3.0 mm, 4.5 mm, 6.0 mm, 8.0 mm, 9.5 mm, as well as smaller diameters including 0.25 mm, 0.5 mm, and 0.75 mm.

Overall lengths are offered in inches (6 in, 12 in, 18 in, 24 in) and millimeters (150 mm, 300 mm, 450 mm, 600 mm). Junction types include 'G' (Grounded), 'E' (Exposed), 'U' (Ungrounded), or 'S' (Surface).

Connector options and accessories:

• Molded Standard Connector
• Miniature Connector
• Heavy-Duty Transition Junction Probe
• Miniature Transition Junction Probe
• Dual Elements configuration available
• Male straight M8 plug (add "M8-S-M" to model number)
• Male right-angled M8 plug (add "M8-R-M" to model number)
• Male straight M12 plug (add "M12-S-M" to model number)
• Replacement Probes Available

Note: For probes with 0.75 mm diameter and larger, molded transition joints are supplied; smaller-sized probes use stainless steel transition joints with stripped leads standard.

Key Product Differences

The series distinguishes between K (CHROMEGA™-ALOMEGA™ XL) and N (OMEGA-P™-OMEGA-N™ XL) alloy calibrations. Model numbers follow the format: <ANSI Color Code/Alloy> - <Sheath Dia.> - <Junction Type> - <Length> (example: KQXL-18U-12). Specific model prefixes indicate probe style, such as KMQXL/**NMQXL** for miniature connectors and **TJ36-** or **NB(*)-** for transition junctions.

PFA coating is available by ordering the standard model number with a suffix '-PFA', limited to 200°C (400°F) max. Mating connectors and clamps are sold separately.