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Honeywell STT350 Temperature Transmitter

Honeywell’s flagship STT350 Smart temperature transmitter is a high-performance temperature transmitter with reduced uncertainty for custody transfer applications.  The Honeywell STT350 offers superior stability and noise performance to reduce measurement variation and lower maintenance costs.


This product line has been discontinued and replaced with the Honeywell STT850 Temperature Transmitter range.


Via galvanic isolation the Honeywell STT350 is capable of transmission over long distances through noisy plant environments. The STT350 is FISCO approved and automatically provides true differential temperature measurement of thermocouple or RTD inputs by individual linearization of each sensor reading, and then computing the difference.

As Honeywell channel partners, Fluidic offer the Honeywell STT350 temperature transmitter puck included in a full RTD/temperature transmitter assembly with probe and remote electrical head, and with thermowell where appropriate.  See information on our association with Okazaki and H&B Sensors for more information on these assemblies (Okazaki’s Vortexwell is a particularly unique offering).

The Honeywell STT350 is available in different forms is designed to be mounted in the DIN Rail panel or field mounted on a two inch pipe. These units come with several communication options which include 4 to 20ma analog output, Foundation Fieldbus  and DE Protocol.


Honeywell STT350 Temperature Transmitter specifications…


  • Widest range of RTD and T/C input options
  • Robust galvanic isolation for noise immunity
  • Broad selection of housings and materials
  • Remote communications
  • Available with integral display unit
  • Reduced uncertainty for custody transfer applications
  • Supports 4-20ma/Foundation Fieldbus/Honeywell DE Output
  • Supports EDDL and DTM
  • FISCO approval


Models within the Honeywell STT350 transmitters include…


  • STT350 Single input transmitter with Honeywell DE protocol and 4-20mA output
  • STT35F Foundation Fieldbus communications


Fluidic hold an exclusive channel partner agreement with Honeywell Field Products division.  Our instrumentation engineers are product trained and able to help with instrument selection within the full Honeywell Field Product instrumentation portfolio. Additionally, Fluidic are able to offer a complete instumentation assembly package, including RTD/Transmitter and thermowell assemblies. Fluidic order directly with the factory via an exclusive channel partner web portal and hold stock for some common lines.  Please contact either office for more information (Glasgow 0141 641 5920 or Warrington 01925 572401).



  • Download Honeywell STT350 Temperature transmitter puck datasheet
  • Download Honeywell Temperature Transmitter pucks brochure
  • Download Honeywell Reliable Temperature Measurement Whitepaper
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