Pressure & Temperature Transmitter

Honeywell’s SmartLine smart measurement system sets the standard for total performance.

The pressure transmitters feature industry-leading performance for tighter process control. They also offer the lowest total cost of ownership through a unique modular design, an intuitive human machine interface (HMI) and display, and polarity insensitivity. Smart Connection Suite further supports transmitter messaging and tamper reporting.

Find out which Transmitter is right for you! Click here to use the Smartline Application and Validation Tool.

SmartLine® Pressure Transmitters

Honeywell’s New SmartLine ST 700 Pressure Transmitter family includes absolute pressure, gauge pressure, flange mount and remote seal transmitters that are superior in performance, stability, reliability and rangeability. With innovative modularity and an intuitive human machine interface (HMI), these products are ideal for a wide range of industrial process applications.

Honeywell’s SmartLine ST 800 Pressure Transmitter family includes absolute pressure, gauge pressure, draft range pressure, flanged and remote seal transmitters. Refineries, chemical and pharmaceutical plants and paper mills around the globe rely on these transmitters for accurate and consistent pressure measurement.

SmartLine® Temperature Transmitters


The SmartLine STT650 DIN rail mounted temperature transmitters offer high measurement accuracy, stability and reliability over a wide range of process and ambient temperatures.Their compact designs, along with dual channel options, help accommodate multiple temperature measurements on a panel, thus lowering both costs and inventory. Designed to deliver very high performance, the SmartLine STT650 easily meets the most demanding needs for temperature measurement, allowing it to replace virtually any transmitter available today.


  • High accuracy – 0.1°C for RTD
  • Faster response, up to 135 ms update
  • Stable measurement, 0.12% of span for two years
  • Built-in 1500 VAC galvanic isolation
  • Superior noise performance – tested for 2 KV surge/2.5 kv burst noise
  • Sensor diagnostics
  • Simple and easier configuration
  • Compact design, saving over 50% panel space.



The STT700 is an exciting new addition to the SmartLine Temperature portfolio and upgrades the widely-used STT250 temperature transmitter.  The STT250 has been Honeywell’s main temperature transmitter with many decades of in-field use.  The STT700 is a direct replacement for the STT250 and thus is suitable for the majority of process applications including those for control and safety while delivering excellent performance at a low installed cost.


  • SmartLine platform features including SmartLine Connection Advantage when used with Experion
  • Single input supporting up to 4-wire RTD sensor connection
  • Dual input option supporting up to two (2) 3-wire RTD sensor connections
  • Digital accuracy up to 0.15°C for RTD
  • Callendar-Van Dusen sensor constants input
  • HART7 communications
  • DE communications
  • Field housing, head mount, panel mount and DIN rail mounting options
  • Transmitter and sensor diagnostics
  • FM / CSA / ATEX / IEC Ex approvals
  • Full compliance with SIL 2 / 3 requirement
  • Up to a 4-year warranty



The STT750 Temperature Transmitters are intended to be a competitive replacement for the STT250 HART field mount temperature transmitters. Suitable for a wide range of control and safety applications, the transmitters provide users with the benefits of the SmartLine platform, including modularity, easier maintenance and lower total cost of ownership.


  • Single universal input
  • Digital accuracy up to 0.14°C for RTD
  • Easy-to-use-and-read basic display
  • Transmitter and sensor diagnostics
  • HART7 communications
  • Full compliance with SIL 2/3 requirements
  • Up to a 3-year warranty
  • FM/CSA/ATEX/IECEx approvals



The SmartLine STT850 temperature transmitter is designed to deliver very high performance across varying ambient temperatures. The total installed accuracy level of the transmitter, including the ambient temperature effect, allows the STT850 to replace virtually any transmitter available today.


  • Digital accuracy up to 0.1°C for RTD
  • Stability up to 0.01% of URL per year for ten years
  • 130 ms update time
  • Sensor matching facility for higher accuracy
  • Built-in digital output option
  • Sensor health trend through advanced display
  • Full compliance with SIL 2/3 requirements
  • Lifetime 15-year warranty
Download the Honeywell Field Solutions PDF brochure.
Download the Honeywell Smartline Pressure, Temperature, Level and Multivariable Transmitters PDF.


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Find the products that meet your needs, or contact Thermo-Kinetics to discuss your challenges and let our experts help you to solve them.