Honeywell STT850 Temperature Transmitter

1. Overview

The Honeywell STT850 Temperature Transmitter is a high-performance smart transmitter designed for exceptional temperature measurement accuracy and reliability. The SmartLine STT850 temperature transmitters are part of the Honeywell SmartLine® family. They offer excellent stability and advanced diagnostics.

These transmitters also provide smooth digital communication. This makes them perfect for many industrial process applications.

The Honeywell STT850 SmartLine Temperature Transmitter (transmisor de temperatura Honeywell STT850) is FM-approved and engineered to perform reliably in harsh, demanding environments. Its two-compartment design offers excellent protection for electronic parts. The transmitter’s advanced signal processing ensures accurate, stable operation across different temperatures.

The SmartLine STT850 can measure Ohms, millivolts (mV), and temperature from a variety of sensors, including RTDs and thermocouples. It supports field configuration for both DE and HART® devices, ensuring maximum compatibility with modern control and monitoring systems.

2. General Description

The Honeywell STT850 Temperature Transmitter combines smart transmitter technology with robust mechanical and electrical design to deliver reliable temperature measurements. Designed for industrial automation and process control, it offers excellent accuracy, stability, and environmental durability.

The Honeywell STT850 SmartLine Temperature Transmitter features advanced sensors and self-diagnostic capabilities. It also has temperature compensation algorithms. This ensures accurate temperature readings, even in changing process conditions.

3. Technical Specifications

l Model: Series STT850

l Product Line: SmartLine® Temperature Transmitters

l Type: Smart Temperature Transmitter

l Measurement Range: Various models available (e.g., -50°C to +200°C or wider ranges based on sensor type)

l Measured Inputs: RTDs, Thermocouples, Ohms, and millivolts (mV)

l Accuracy: RTD digital accuracy ±0.1°C

l Stability: ±0.01% of URL per year

l Update Time: 125 ms (single input), 250 ms (dual input)

l Output Signal: 4–20 mA analog with HART® or FOUNDATION™ Fieldbus digital protocol

l Power Supply Voltage: 10.8 to 42.4 VDC

l Operating Temperature Range: -40°C to +85°C (-40°F to +185°F)

l Housing Type: Dual-compartment, explosion-proof design for harsh environments

l Communication Capability: Field configurable for DE and HART® Devices

l Certifications: FM, CE, ATEX, and SIL 2/3 compliance

4. Key Features of Honeywell STT850

A. High-Performance Measurement

B. The STT850 is a high-performance temperature transmitter. It provides accurate, repeatable, and reliable measurements in many process conditions.

C. Advanced Communication and Configuration

D. You can set up the Honeywell SmartLine STT850 for both DE and HART® devices. It allows two-way communication for diagnostics, configuration, and calibration. You can do this without taking the device out of service.

E. Dual-Compartment Housing Design

F. The design of the dual-compartment temperature transmitter houses the smart transmitters, enhances protection against moisture, vibration, and electrical interference, and simplifies maintenance.

G. SmartLine Integration

H. The SmartLine STT850 Temperature Transmitter seamlessly integrates with Honeywell Experion® control systems and other HART-compatible platforms, enabling remote configuration and advanced process visibility.

I. Superior Environmental Performance

J. Designed to deliver exceptional high performance across varying ambient temperatures, ensuring stability and measurement accuracy in the toughest industrial settings.

K. Multi-Input Capability

L. This device measures Ohms, millivolts, and temperature. It supports many types of RTDs and thermocouples for various applications.

M. Safety and Compliance

N. The FM-approved STT850 temperature transmitter meets international standards for explosion-proof and intrinsically safe applications.

O. Comprehensive Diagnostics

P. Built-in diagnostics continuously monitor sensor health, loop integrity, and configuration status to prevent process downtime.

Q. Enhanced Accuracy Through Sensor Matching

R. Sensor matching and linearization features provide optimized accuracy and reduced drift, particularly useful in critical process monitoring.

5. Applications

The Honeywell STT850 SmartLine Temperature Transmitter is ideal for applications requiring precise and reliable temperature measurement, including:

l Oil and Gas Industry – For monitoring temperature in pipelines, tanks, and refineries.

l Chemical and Petrochemical Plants – For accurate process temperature control and safety management.

l HVAC Systems – For critical temperature regulation and efficiency optimization.

l Food and Beverage Manufacturing – For process consistency and quality assurance.

l Power Generation and Utilities – For monitoring turbine, boiler, and heat exchanger temperatures.

Users also employ the Honeywell temperature transmitter STT850 and other SmartLine temperature transmitters in pharmaceutical and environmental monitoring, where precision and reliability are essential.

6. Installation Procedure (Step-by-Step)

A. Preparation

Gather necessary tools (screwdrivers, wrenches, and HART communicator).

Review the installation manual for the Honeywell STT850 SmartLine temperature transmitter.

Ensure safety compliance before wiring or mounting.

B. Mounting

Securely attach the transmitter using the standard mounting bracket.

Ensure proper alignment with the thermowell or process connection.

C. Wiring

Follow the wiring diagram in the manual.

Ensure tight, corrosion-free electrical connections.

D. Configuration

Power on the transmitter.

Use a HART communicator or compatible system to configure zero, span, and sensor type.

For DE communication, select and configure the appropriate device address and parameters.

E. Testing

Perform loop and temperature accuracy tests.

Compare readings with calibrated reference sensors.

F. Final Checks

Verify stable signal output.

Inspect seals and housing for integrity.

Document configuration and calibration details.

7. Related Part Numbers

STT850-S-0-A-AD0-11S-B-40A0-F5-0000

STT850-E1AC4AS-G-AHS

Series STT850 SmartLine Temperature Transmitters

Honeywell STT850 SmartLine Temperature Transmitter – (transmisor de temperatura Honeywell STT850)

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Honeywell TC808B1066AUS-IV Heat Detector

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8.Summary

The Honeywell SmartLine STT850 Temperature Transmitter is a high-quality, FM-approved device. Engineers design it for accurate and stable temperature measurement. Designed to measure Ohms, mV, and temperature, the SmartLine STT850 ensures consistent performance across varying ambient temperatures.

The Honeywell STT850 SmartLine Temperature Transmitter has a dual-compartment housing and a two-way field setup. It also features advanced HART® communication. This design provides excellent functionality, easy maintenance, and long-lasting reliability.

The Honeywell SmartLine STT850 is a top choice for temperature transmitters. Companies use it in oil and gas, chemical processing, HVAC, and power generation. This device offers accuracy, performance, and durability. These features help maintain Honeywell’s strong reputation for innovation in process instrumentation.

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