Honeywell STT650 temperature transmitter

Honeywell STT650 temperature transmitter

Product Overview

The Honeywell STT650 is a high-performance, DIN rail-mounted temperature transmitter from the SmartLine family, engineered for demanding industrial automation and process control applications. The STT650 delivers exceptional measurement accuracy, long-term stability, and operational reliability across a wide range of process and ambient temperatures, making it an ideal solution for control rooms, equipment cabinets, and panel-mounted installations where space efficiency is critical.

The STT650 temperature transmitter features a compact design that saves over 50% of panel space compared to conventional alternatives, while optional dual-channel configurations accommodate multiple temperature measurements on a single unit, reducing both installation costs and inventory requirements.-1-13Designed to meet the most demanding temperature measurement applications, the STT650 can replace virtually any temperature transmitter currently available in the market.-1

The STT650 supports a comprehensive selection of communication protocols, including 4-20 mA analog with HART® version 7.0, FOUNDATION™ Fieldbus (ITK 4.6 compliant), and PROFIBUS® PA (version 3.0), ensuring seamless integration with all major distributed control systems (DCS) and programmable logic controllers (PLC).-3-10

In addition to its core temperature measurement capabilities, the STT650 can be repurposed as a position or level transmitter and functions as a valve and resistance position sensor, offering exceptional application versatility for field engineers and system integrators.-3-10

Key Technical Specifications

Performance Characteristics

Accuracy & Stability

The STT650 delivers digital accuracy up to 0.1°C for RTD inputs, providing high-precision temperature measurement for critical process control applications.-1-13The transmitter maintains long-term stability of ±0.12% of span over a two-year period, significantly reducing calibration frequency and associated maintenance costs.-1-2

Update Time & Response

The STT650 features a rapid 135 ms update time for analog output models, delivering near real-time temperature data to control systems and supporting fast process adjustments. HART output models operate at 440 ms update time, balancing communication overhead with responsive performance.-2-10

Galvanic Isolation & Noise Immunity

The STT650 incorporates built-in 1500 VAC galvanic isolation, effectively eliminating ground loop interference and protecting downstream control equipment from voltage transients.-3-13The transmitter is tested for superior noise immunity, including 2 KV surge and 2.5 KV burst noise performance, ensuring reliable operation in electrically noisy industrial environments.-1-3

Environmental & Compliance Specifications

Operating Conditions

The STT650 operates within an ambient temperature range of -40°C to +85°C (-40°F to +185°F), making it suitable for use in harsh industrial environments, outdoor enclosures, and climate-controlled equipment rooms alike.-2-10The transmitter withstands relative humidity from 0 to 95% non-condensing, ensuring reliable performance in high-moisture environments.

Certifications & Approvals

The STT650 carries comprehensive global certifications, including:

CE Mark – European conformity

IECEx – International explosion protection standard

ATEX – European hazardous area compliance

CSA – Canadian Standards Association

FM Approvals – Intrinsic Safety, Non-Incendive, Dust Tight-2-5

SIL Hardware Assessment – EXIDA certified for safety instrumented system applications-5

EMC Compliance – Tested for conducted noise (10 Vrms, 15-100 MHz), radiated noise (10 V/m, 80-1000 MHz), and burst noise (2.5 KV)-3

Configuration & Diagnostics

Configuration Options

The STT650 offers multiple configuration methods to suit different operational needs:

STT17C PC Configuration Tool: Graphical user interface supporting Windows XP, 7, 8, and 8.1, ideal for non-hazardous environment setup-2

HART Handheld Communicator: Field-configurable for HART-enabled STT650 models-5

PactWare (DTM): Device Type Manager software supporting comprehensive HART device configuration-5

Diagnostic Capabilities

The STT650 features comprehensive on-board diagnostics compliant with NAMUR NE43 standards for sensor error detection, providing advanced warning of potential sensor failure and enabling proactive maintenance before unplanned shutdowns occur.-2-3-10

Model Selection & Ordering Guide

The STT650 is available in multiple configurations. A complete model number follows the format:

STT650-**-––__- _ _ _- _ – _ _, _ _, -0000**

Example Model Number: STT650-S2-0-A-CH0-13C-C-FE-0000

Applications & Industries

The STT650 is ideally suited for a wide range of control and monitoring applications across multiple industries:

Oil & Gas: Refinery temperature monitoring, pipeline control systems

Chemical Processing: Reactor temperature management, exothermic process monitoring

Power Generation: Boiler control, turbine inlet temperature measurement

Pharmaceuticals: Sterilization validation, bioreactor temperature control

Food & Beverage: Pasteurization, cooking process monitoring

HVAC: Building automation, environmental control systems

General Industrial: Equipment cabinets, control panels, machinery monitoring

Compatible Systems: Honeywell Experion PKS, all major DCS and PLC platforms supporting 4-20 mA, HART, FOUNDATION Fieldbus, or PROFIBUS PA communication protocols

Ordering Information