The RTT temperature transmitter with hollow, rotating, and fixed mechanical parts allows this transmitter model to be connected in different orientations even when space is at a premium. Due to its simplicity, it allows endless customizations.

 Features RTT

  • Self calibration, it doesn’t need a calibration on the field even for the spare parts.
  • Several self tests are performed to assure the measure accuracy.
  • Rotating and stationary parts can be swapped or replaced individually.
  • Fast troubleshooting through a simple coding for each output, without disassembling the parts:

          Fault detection                                                                                                 Reading

          PT100 short circuit                                                                                          21,0 mA

          PT100 open/ broken                                                                                        21,5 mA

          No communication between parts                                                                   22,0 mA

          Measure not reliable                                                                                        22,5 mA


  • MODBUS with isolated RS485 (Optional).
  • Output entirely isolated from power supply for better noise immunity.
  • All built-in, it doesn’t need external signal condition board.
  • Installation accepts a 10mm clearance between the rotating and stationary part.
  • Several shaft diameters available.
  • Connections with bolts, screws, connectors or fastons.
  • From 1 channel to 8 channels.

Performance RTT

  • Range: 0 – 1500 °C. (Configurable).
  • Power: 17-27Vac or 22-35Vdc; current 0,2A.
  • Output: Voltage: 4-20mA; GND common. Isolated from power supply. (Optional frequency or mV).
  • Accuracy: Standard ±0.15 °C, (Optional up to ±0.05 °C ).
  • Resolution: 0.025 °C.
  • Material: PA66+FG30% and aluminium protection frame.
  • Max. speed: 10.000rpm.
  • Room temperature: 100°C max for the rotating part. 80°C for the standing part.
  • Installation: from 1mm to 10mm (standard 4mm).
  • Inputs: 1 sensor Pt100 α = 0,00385, P200, 2-wire or 3-wire (Others on request)


Order code:

23.012 – RTT 3CH PT100 0-250°C 20mm 4-20mA MODBUS485

23.013 – RTT 1CH PT100 0-250°C 20mm 4-20mA

23.014 – RTT 1CH PT100 0-400°C 20mm 4-20mA

23.015 – RTT 1CH PT100 0-250°C 25mm CONN 4-20mA

23.016 – RTTFJI 2CH PT200 0-250°C 22mm 4-20mA (Fuji Electric compatible)

23.017 – RTTFJI 1CH PT200 0-300°C 22mm 1OUT FREQ 1OUT 4-20mA (Fuji Electric compatile)


For further information or customization contact E.D. Elettronica Dedicata.

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