Honeywell STT17H temperature transmitter

Honeywell STT17H temperature transmitter

Overview

The Honeywell STT17H temperature transmitter belongs to the STT170 SmartLine family—Honeywell‘s economy-tier yet highly capable temperature measurement solution. This 2-wire loop-powered transmitter converts low-level sensor signals from RTDs, thermocouples, resistance elements, or mV sources into a standard 4-20 mA analog output with integrated HART digital communication, enabling remote configuration, monitoring, and diagnostics-1.

Compared to direct-wired temperature sensor monitoring, the STT17H delivers superior accuracy, safety, and reliability while substantially reducing wiring costs and simplifying installation-3. This makes the Honeywell STT17H an ideal choice for OEMs, system integrators, and end users requiring cost-effective yet high-performance temperature monitoring across diverse industrial applications.

Key Features of the Honeywell STT17H

HART/4-20 mA output – Seamless integration with PLCs, DCS, and other automation systems-3

RTD, thermocouple, Ohm, or mV input – Universal input flexibility-3

Single or dual sensor input – Supports difference or average temperature measurement-8

DIN Form B head mounting or B-type DIN rail mounting – Flexible installation options-3

HART multidrop capability – Connect up to 15 transmitters on a single 2-wire loop-8

Galvanic isolation – Withstands test voltage of 500 Vac for 1 minute-18

NAMUR NE43 sensor error response – Programmable upscale (23 mA) or downscale (3.5 mA) alarm levels-1

Sensor error detection – Complies with NAMUR NE 89 guidelines-8

Automatic signal linearization – User-programmable upper and lower range values-3

SIL 2/3 compliance – Certified for safety-critical applications-

Technical Specifications

Electrical Specifications

Accuracy & Performance

The STT17H achieves high measurement accuracy across all supported sensor types:

Response Time: Programmable from 1 to 60 seconds for RTD/TC inputs-1

Input Capabilities

The STT17H accepts a wide variety of input sensor types:

RTDs: Pt100, Pt1000, Ni100

Thermocouples: Types E, J, K, L, N, R, S, T, B, U, W3, W5

Resistance (Ohm) – For linear resistance variation conversion (e.g., valves or Ohmic level sensors)

Millivolt (mV) – Bipolar mV signal amplification to 4-20 mA-8

Sensor Wiring Compensation: 2-, 3-, and 4-wire connections supported for RTD and resistance inputs-8

Environmental Specifications

Dimensions & Weight

Diameter: 44 mm (1.73 inches)

Height: 20.2 mm (0.80 inches)

Weight: Approximately 150 g-1

Installation & Configuration

Mounting Options

The STT17H supports two primary mounting configurations:

DIN Form B Head Mounting – Direct integration into sensor head assemblies for compact installations

• type DIN Rail Mounting– For panel-based installations in control cabinets
• Configuration Tools

The STT17C Configuration Toolkit provides a PC-based graphical interface for configuring STT171, STT173, and STT17H transmitters-1. Key configuration parameters include:

Tag Number

Sensor Type and Wiring (2-, 3-, or 4-wire)

Temperature Units (°C or °F)

Upper Range Value (URV) and Lower Range Value (LRV)

Output Range and Limits

Sensor Error Action (Upscale/Downscale)

Response Time-33

Additionally, the STT17H can be configured directly via HART field communicator, providing flexibility for both laboratory and field-based setup-3.

Safety Installation Notes

For safe installation in hazardous areas:

The transmitter must be installed by qualified personnel familiar with applicable national and international standards-18

For ambient temperatures ≥60°C, heat-resistant cables rated at least 20 K above ambient must be used-18

For dust-explosive atmospheres, install in a metal enclosure meeting IP6X per EN 60529-18

For flammable gas/vapor atmospheres (STT17H-BN model), install in an enclosure providing at least IP54-18

Safety Approvals & Certifications

The Honeywell STT17H is available with comprehensive global certifications:

Entity Parameters (STT17H-BS):

Ui(Vmax) = 30 V

Ii(Imax) = 120 mA

Pi = 0.84 W

Ci = 1 nF

Li = 10 uH-20

Temperature Class Limits:

T4: -40°C to +85°C

T6: -40°C to +60°C-20

Typical Applications

The STT17H is suitable for a wide range of temperature monitoring and process control applications:

Chemical processing – Reactor temperature control, exothermic/endothermic reaction monitoring

HVAC systems – Air handling unit temperature regulation, chiller/boiler monitoring

Manufacturing processes – Extrusion, molding, heat treatment monitoring

Oil & gas – Pipeline temperature monitoring, wellhead instrumentation

Pharmaceutical – Batch reactor temperature control, cleanroom monitoring

Food & beverage – Pasteurization, sterilization, storage tank monitoring

Power generation – Bearing temperature monitoring, turbine inlet/outlet measurement

Application highlights:

Linearized temperature measurement with Pt100, Ni100, or thermocouple sensors

Difference or average temperature measurement using two resistance or thermocouple sensors

Conversion of linear resistance variation (e.g., valves, Ohmic level sensors) to 4-20 mA

Amplification of bipolar mV signals to standard analog current-8

Ordering Information

The Honeywell STT17H temperature transmitter is available in various configurations. A typical ordering code example:

Part Number: STT17H-BS-0-T0R-ENE-S00-00-33

Consult Honeywell for complete ordering code definitions and available options.

Comparison with STT170 Series Models

Why Choose the Honeywell STT17H?

The STT17H occupies a unique position in Honeywell‘s temperature transmitter portfolio—delivering enterprise-grade reliability at an economy-tier price point. Key differentiators include:

Cost-effective temperature monitoring without compromising on essential features like HART communication and dual sensor input

Reduced wiring costs – 2-wire loop-powered design minimizes cabling requirements compared to direct-wired sensor installations

Automatic signal linearization – Eliminates the need for external signal conditioning

Comprehensive safety certifications – FM, CSA, ATEX, IECEx, and SIL 2/3 compliance enable deployment in hazardous and safety-critical environments

Global support – Honeywell‘s worldwide distribution and technical support network ensures quick access to spares and application assistance