Available Available for project application review and quotation
Temperature Measurement Series
BDT-GT

BDT-GT Gasket-Mount Surface Thermocouples

Compact gasket-mount thermocouples for direct surface-temperature measurement on machinery, engines, housings, rotating equipment, and industrial assets.

Brand: Blue Dragon Technology Manufactured by: MESIT, Italy Supply & support: Blue Dragon Technology
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Product Overview

Purpose-built measurement, clearly presented.

The BDT-GT is a compact gasket-mount surface thermocouple designed for installation against machinery, engines, housings, flanges, and other industrial equipment surfaces. The sensor may be attached through a stud welded to the monitored surface or secured using a suitable nut-and-bolt arrangement.

The complete gasket sensing area acts as the measuring junction, providing direct thermal contact with the monitored surface. Thermocouple type, gasket geometry, lead construction, lead length, insulation, termination, environmental protection, and operating range are selected for the application.

Distinctive Capabilities

  • Bolted or stud-mounted surface-temperature measurement
  • Compact installation on machinery and industrial equipment
  • Direct thermal contact with the monitored surface
  • Custom gasket geometry and mounting-hole dimensions
  • Flexible lead-wire or sheathed lead construction according to service conditions
Performance & Technical Data

The measurement method and the values that matter.

How it measures

Measurement Principle

The thermocouple measuring junction is integrated with or thermally coupled to the gasket sensing area. When the gasket is mechanically secured against the monitored equipment surface, two dissimilar thermocouple conductors generate a thermoelectric voltage corresponding to the local surface temperature. Measurement performance depends on the thermal contact between the gasket sensing area and the surface, the mounting arrangement, thermocouple construction, surrounding temperature, lead routing, and installation condition.

Measurement ParametersLocal equipment-surface temperature
Sensor technologyThermocouple; type selected for the application
Sensing areaComplete gasket area acts as the measuring junction
MountingStud welded to the surface or suitable nut-and-bolt fastening
Gasket geometryProject specific
Mounting-hole dimensionsProject specific

Complete Technical Data

Lead construction and length
Selected for the installation environment
Temperature range
Dependent on thermocouple type, lead insulation, gasket construction, and service conditions
Termination
Lead wire, connector, terminal block, or project-specific arrangement
Environmental protection
Selected according to temperature, moisture, vibration, contamination, and mechanical exposure
Calibration and documentation
Specified according to project requirements
Availability
Available for project application review and quotation
Industrial Use

Applications and industries.

Typical Applications

Machinery surface-temperature monitoringEngine surface-temperature monitoringBearing and bearing-housing temperature measurementMotors, generators, and compressor housingsTurbines and rotating equipmentFlanges, manifolds, gearboxes, and equipment surfacesEquipment-protection and maintenance monitoringGasket-Mount Surface Temperature Measurement

Industries Served

Chemical ProcessingFertilizers & ChemicalsFood & BeverageIndustrial ManufacturingMetals, Mining & MaterialsNatural Gas & LNGOil & GasPetrochemicalsPipelines & MidstreamPower GenerationPulp & PaperRefining
Engineering & Integration

Built for specification, installation, and long-term operation.

Engineering focuses on achieving stable thermal contact while selecting the gasket geometry, fastener arrangement, thermocouple construction, lead protection, routing, and termination appropriate for the monitored equipment.

Measurement targetMachinery or equipment surface
MountingStud, bolt, or nut-secured gasket arrangement
Measuring junctionComplete gasket sensing area
Engineering inputFastener geometry, surface condition, temperature, vibration, and lead routing

Sensor Construction

  • Project EngineeredGasket outside diameter, mounting-hole diameter, sensing construction, thermocouple type, lead insulation, lead length, protection, and termination are selected for the installation.
  • Application DependentFlexible cable, protected lead, connector, terminal block, or junction-box arrangements may be specified.
  • Project EngineeredThe complete sensor configuration must be compatible with the equipment surface, fastener, surrounding temperature, vibration, and maintenance access.

Materials & Junction Design

  • StandardNo extracted sample is required; the gasket sensing area is mounted directly against the monitored equipment surface.
  • Project EngineeredThe mounting-hole size, gasket contact area, surface finish, fastener arrangement, and available installation space are reviewed before manufacture.
  • Application DependentSurface coatings, uneven contact, contamination, air gaps, vibration, and external heat sources can affect the measured temperature.

Mounting & Installation

  • StandardThe sensor is mechanically secured using a welded stud or a suitable nut-and-bolt arrangement.
  • Project EngineeredMounting dimensions and lead exit orientation are coordinated with the monitored equipment.
  • Application DependentFastener torque and installation method must follow the equipment manufacturer's mechanical requirements.
  • StandardThe passive thermocouple sensor requires no local operating power; any transmitter or signal conditioner has separate utility requirements.

Signal & Termination

  • Application DependentThe sensor may be connected directly to a compatible thermocouple input or through a project-selected temperature transmitter.
  • Project EngineeredThermocouple type, polarity, extension cable, cold-junction compensation, grounding, shielding, and termination must be coordinated with the monitoring system.
  • Application DependentAlarms, shutdown functions, condition-monitoring logic, and communication outputs are provided by the connected plant instrumentation rather than by the passive sensor itself.

Calibration & Quality

  • Application DependentThermocouple type, tolerance class, calibration range, certificates, and traceability requirements are defined at quotation.
  • StandardFinal inspection should verify gasket dimensions, mounting-hole dimensions, lead length, polarity, continuity, insulation condition, and termination.
  • Project EngineeredCalibration should reflect the intended operating range and the requirements of the plant quality or maintenance system.

Maintenance & Replacement

  • StandardPeriodic inspection should check gasket contact, fastener security, lead condition, abrasion, insulation damage, terminal connections, and signal stability.
  • Application DependentInspection frequency is determined by operating temperature, vibration, contamination, movement, and equipment criticality.
  • Project EngineeredReplacement sensors should preserve the approved gasket geometry, thermocouple type, lead route, and installation position.

Process & Application Considerations

  • StandardThe sensing gasket must not be described or used as a pressure-retaining or process-sealing gasket unless specifically engineered and documented for that function.
  • Application DependentInstallation must not compromise the structural, fastening, alignment, or sealing function of the associated equipment joint.
  • Application DependentHot surfaces, rotating machinery, vibration, electrical equipment, and restricted maintenance access must be considered during installation.
  • Project EngineeredHazardous-area transmitters, junction boxes, connectors, or accessories require the appropriate project-specific certification.
Application Review

Application Engineering Notes

Configuration information

Selection requires the monitored surface material, normal and maximum temperature, available stud or bolt dimensions, gasket outside diameter, mounting-hole diameter, surface condition, vibration level, surrounding environment, thermocouple preference, lead length and protection, termination, hazardous-area classification, and documentation requirements.

Project-specific specification

Temperature range, gasket geometry, response time, thermocouple type, tolerance, lead insulation, environmental protection, and certification are selected for the installation and confirmed in the approved project documentation.

Project Delivery

Project Integration & Support Scope

Blue Dragon reviews the measurement objective, interfaces, documentation, commissioning, and lifecycle requirements as part of project configuration. The scope below identifies the principal items to confirm before order placement.

Measurement Objective
Local equipment-surface temperature measurement on machinery, engines, housings, bearings, flanges, bolted assemblies, and other industrial equipment using a gasket-mount thermocouple.
Signal Outputs
The passive thermocouple provides a millivolt signal through the selected lead and termination. A transmitter, conditioned output, local indication, or communication protocol is supplied only when specified.
Data Integration
The sensor can connect directly to a compatible thermocouple input or through a project-selected transmitter to a PLC, DCS, protection system, historian, or condition-monitoring system. Thermocouple type, polarity, extension cable, grounding, shielding, and termination must match the receiving system.
Alarms & Diagnostics
High-temperature alarms, equipment-protection logic, sensor-failure detection, open-circuit handling, and communication status are provided by the connected plant instrumentation rather than by the passive gasket sensor.
Documentation
The project package may include sensor and mounting drawings, gasket and hole dimensions, thermocouple and lead details, tag information, termination drawings, calibration certificates, inspection records, and project-specific quality documents.
Commissioning Support
Commissioning can include mounting and fastener review, gasket contact and lead-exit inspection, polarity and continuity checks, loop testing, transmitter or PLC channel verification, and handover documentation.
Lifecycle Support
Lifecycle support covers gasket contact, fastener security, lead and insulation condition, terminal checks, calibration guidance, replacement sensors, troubleshooting, spare parts, and long-term technical assistance.
Technical Resources

Product Documents

Product Sheet first, followed by the Brochure, Manual, and any additional technical documents.

Application Engineering

Discuss your measurement application.

Share the sample, measurement range, operating conditions, project location, and timeline. Blue Dragon Technology will review the application and recommend the appropriate configuration.

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