Transmitters Transmitter solutions

Smart Temperature Transmitter STT250

Stt250

Honeywell’s STT 3000 family of microprocessor-based smart temperature transmitters includes the STT250 and the STT350 offering high performance and advanced functionality. The STT250 units offer competitive performance in a more compact module and with a wider range of smart communications protocols.

STT250 can be supplied complete with thermocouple or RTD sensors and with any of a wide range of thermo wells. The sensors are of Mineral Insulated (MI) construction with lengths of up to two meters available.

For the direct head mount installation the sensor is supplied with a mounting plate for STT250 module attachment and fixing screws to provide the spring loaded attachment to the housing. For EEx d IIC T6 applications a flame trap is included between the sensor and sensor entry of the housing.

Features

  • Four common models of temperature transmitters are available for application.
    • STT25M 4-20mA Output, SFC/SCT Configurable
    • STT25H HART Protocol, 4-20mA Output
    • STT25D Digital DE/4-20mA Output, for Digital Integration
    • STT25T Dual Input, HART Protocol, 4-20mA Output
  •  Direct sensor head mounting in DIN Form A housing. Housing materials include aluminium, 316SS and cast iron.
  • Mounting options include wall, pipe, DIN rail, field or direct sensor head mounting.
  • Single model accepts input signals from two RTD or thermocouple or mixed sensor types Pt100, J, K, T or E. # Suitable for 3- or 2-wire Pt100.
  • Hard-wired upscale/downscale failsafe link to ensure secure operation in the event of a failure.
  • Open circuit sensor analysis carried out in every measurement cycle.
  • Selectable latching/non-latching failsafe operation for open circuit sensor.
  • Integral analogue or digital indication meter option.
  •  Analogue to digital converter validated frequently.
  •  Configuration adjustments and diagnostics checks can be made either locally or remotely over the signal wires from anywhere along their route, saving time during commissioning, start up and maintenance activities.