COMET GD1250-1 – Robust Type K Thermocouple (-65 to +980 °C)

COMET GD1250-1 – robust Type K Thermocouple (-65 to +980 °C), Nextel Ceramic Duplex Insulation, Ø 4 mm, Class 1 Accuracy (±1.5 °C or ±0.4%), Subminiature Plug

The COMET GD1250-1 is a professional Type K thermocouple with duplex Nextel ceramic insulation and a subminiature plug – the ideal high-temperature probe for precise measurements in furnaces, burners, exhaust systems, heat-treatment plants, melting furnaces, dryers, engine test benches, laboratories, industrial processes, or anywhere temperatures up to +980 °C need to be measured reliably and with long-term stability. With a measuring range from -65 to +980 °C and Class 1 accuracy according to IEC 584-2 (±1.5 °C or ±0.4% of reading – whichever is greater), it meets the highest demands for precision and stability. The duplex insulation made of Nextel ceramic (outer diameter 4 mm) provides excellent heat resistance, mechanical strength, and durability – even under vibration, aggressive atmospheres, and high temperatures.

The integrated subminiature male plug enables quick and secure connection to handheld meters, data loggers, controllers, or multimeters. The thermocouple is optionally available in various cable lengths – simply select your preferred length in the configurator. The probe is ready for use, calibrated, and supplied with a traceable calibration certificate. No additional adapter required – plug & play with most standard thermocouple instruments. Whether as a replacement probe, an addition to existing systems, or for new measurement tasks – the GD1250-1 impresses with superior quality, reliability, and ease of use.

The thermocouple is maintenance-free, stable over the long term, and designed for demanding industrial applications. The Nextel insulation provides optimal protection against oxidation, mechanical stress, and thermal aging – significantly more durable than glass-fiber or Teflon-insulated versions at high temperatures. Intuitive operation: plug in the connector, start measuring. The compact design (Ø 4 mm) allows use even in narrow boreholes, pipes, or confined chambers. Whether as a single probe in the lab, a multi-probe in production, or a reference in calibration – the GD1250-1 is the first choice for professionals who value accuracy and durability.

Why the COMET GD1250-1 is the best Type K thermocouple with Nextel insulation:

• Wide measuring range – -65 to +980 °C – for cryogenic to high-temperature applications
• Class 1 accuracy according to IEC 584-2 – ±1.5 °C or ±0.4% (whichever is greater)
• Duplex Nextel ceramic insulation – extremely heat-resistant and mechanically robust
• Outer diameter only 4 mm – suitable for tight measuring points
• Subminiature male plug – quick connection to standard instruments
• Traceable calibration certificate included – maximum traceability
• Optional cable lengths – freely configurable
• Durable & maintenance-free – for continuous use in industry & laboratory
• 3-year warranty – guaranteed COMET quality

Technical data GD1250-1:

• Type: Thermocouple K (NiCr-Ni)
• Measuring range: -65 to +980 °C
• Accuracy: Class 1 according to IEC 584-2 (±1.5 °C or ±0.004 × t – whichever is greater)
• Insulation: Duplex Nextel ceramic
• Outer diameter: 4 mm
• Connection: Subminiature male plug
• Cable length: Standard or optional
• Application area: High temperature, industry, laboratory, process

Perfectly suited for:

• Industrial furnaces & heat treatment systems
• Burners & exhaust monitoring
• Melting furnaces & crucibles
• Engine & turbine test benches
• Ceramics & glass production
• Laboratory & calibration applications
• Process control & quality assurance
• Replacement probe for existing measuring systems

Installation and use – done in seconds

Insert or mount the probe into the measuring point, plug the subminiature connector into the instrument/logger – done! No on-site calibration required – certificate included. The illuminated display (on compatible devices) and the acoustic/optical alarm (on loggers) ensure safe and convenient use. Optional cable lengths available for optimal flexibility.

Available versions:

• Cable length 1 meter
• Cable length 2 meters
• Cable length 3 meters
• Cable length 4 meters

Summary:

• -65 to +980 °C
• Double-walled insulation – Nextel ceramic
• 4 mm outer diameter
• With subminiature plug
• Thermocouple tolerance: Class 1 according to IEC 584-2 ±1.5 °C or ±0.004 × t (whichever is greater)

Scope of delivery:

• Sensor in the selected length