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Temperature Sensor – Type B (RT-B/TC-B)

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Type B temperature sensor with a welded coupling and an interchangeable measuring insert
Type B – RT-B resistance thermometer or TC-B thermocouple, both with a welded coupling and an interchangeable measuring insert

Application

Type B is the standard industrial temperature sensor used across marine and industrial applications. Its welded coupling fixes the immersion length when the sensor is manufactured, while the interchangeable measuring insert allows calibration or replacement without removing the protection tube from the process. An extension neck provides thermal separation between the process and the connection head, protecting transmitters and electrical connections.

Type B is suitable for measuring the temperature of air, steam, gases, water and oils in closed pipes and tanks. It can be used at pressures up to 50 bar and flow velocities up to 25 m/s, where the mechanical load on the protection tube becomes the limiting factor.

Routine calibration or sensor replacement normally requires the process connection to be opened. With Type B, the measuring insert can be removed and replaced while the protection tube and welded coupling remain installed in the process, preserving the pressure boundary.

Type B is approved for both marine and offshore installations, making it suitable for engine rooms, tank and cargo systems, offshore platforms and a wide range of industrial applications.

The operating temperature depends on the measuring principle selected. RT-B, fitted with a Pt100 or Pt1000 resistance element, measures temperatures up to 600 °C. TC-B, using a Type K, J, N, T or E thermocouple, extends the measuring range to 1150 °C.

Where it is used
Cooling, lubrication and fuel systems
Ballast, freshwater and service water systems
Boiler and steam systems
Process pipelines, tanks and pressure vessels
Refineries, LNG and offshore process systems

Properties

Sensor element
RT-B with Pt100 or Pt1000 to IEC 60751 for temperatures up to 600 °C, or TC-B with type K, J, N, T or E to IEC 60584-1 for temperatures up to 1150 °C.
Marine approvals
Approved by DNV, LR, BV, ABS, NK and RINA for marine applications.
Offshore approvals
Approved by DNV, LR and ABS for offshore applications.
Measuring insert
Interchangeable measuring insert for calibration or replacement without removing the entire sensor assembly from the process.
Process connection
Welded coupling.
Protection tube
EN 1.4571 (AISI 316Ti) stainless steel for corrosion resistance in marine and industrial environments.
Signal processing
Head-mounted transmitter option for direct 4–20 mA output.
Standards
Mechanical and thermal stress to DIN 43772 (RT-B). Construction to DIN EN 50446 (TC-B).