Reliable Gauge Pressure Measurement for Demanding Processes
The Honeywell SmartLine STG700 is a smart gauge pressure transmitter designed for industrial pressure measurement where stable performance, fast response and flexible configuration are important.
It measures pressure relative to atmospheric pressure and is particularly suited to high-pressure boiler and fuel-feed applications, as well as tank level measurement where process temperatures are relatively high.
Built for High-Pressure Applications
STG700 is designed to handle demanding pressure measurement requirements across a range of industrial processes. Depending on the selected model, the SmartLine STG700 family provides different pressure ranges and configurations to match the application.
The transmitter is well suited to applications where reliable gauge pressure monitoring is required rather than absolute or differential pressure measurement.
Accuracy and Fast Response
For applications where pressure changes need to be detected quickly, STG700 provides a response time as fast as 100 ms.
Depending on the configuration, accuracy can reach:
- Up to ±0.065% of span as standard
- Up to ±0.04% of span with optional accuracy
- Up to 100:1 rangeability
- Up to 0.02% of URL per year stability for 10 years
These characteristics help maintain consistent measurement performance while allowing one transmitter to cover a relatively wide operating range.
SmartLine Technology for Easier Operation
STG700 combines pressure sensing with onboard electronics, diagnostics and flexible configuration options.
The transmitter supports external zero, span and configuration, while local configuration can be performed through the available two- or three-button interface. Optional modular LCD displays can provide configurable units and multiple display screens for easier field operation.
Flexible Communication and Integration
Depending on the selected configuration, STG700 supports industrial communication options including:
- 4–20 mA
- HART 7
- Honeywell Digitally Enhanced (DE)
- Foundation Fieldbus
This allows the transmitter to be integrated into existing process control and instrumentation systems while providing access to configuration and diagnostic information.
Designed for Industrial and Hazardous Areas
STG700 is available with a broad range of certifications and hazardous-area approvals, including FM, CSA, ATEX, IECEx and other regional approvals. Honeywell also specifies SIL 2/3-certified configurations, dual-seal design and NAMUR NE-43 compliance.
This makes the transmitter suitable for applications where pressure measurement equipment must meet defined safety and installation requirements.
Typical Applications
Honeywell positions SmartLine STG700 for applications such as:
- Boiler pressure measurement
- Fuel-feed pressure monitoring
- High-pressure process systems
- High-pressure reaction vessels
- Tank level measurement
- Industrial utility systems
- Chemical and petrochemical processes
The exact model and process connection should be selected according to the required pressure range, process temperature, installation and hazardous-area requirements.
Key Features
- Smart gauge pressure transmitter
- Up to ±0.065% accuracy
- Optional accuracy up to ±0.04%
- Up to 100:1 rangeability
- Response time as fast as 100 ms
- Long-term stability up to 0.02% URL/year for 10 years
- HART 7, Honeywell DE and Foundation Fieldbus options
- Local configuration and modular LCD options
- Comprehensive onboard diagnostics
- Dual-seal design
- SIL 2/3-certified configurations
- Multiple hazardous-area approvals
FAQ
What is the Honeywell STG700 used for?
STG700 is a gauge pressure transmitter for industrial applications. Honeywell specifically highlights high-pressure boiler and fuel-feed measurement, as well as tank level applications with relatively high process temperatures.
What is the difference between gauge and absolute pressure?
Gauge pressure is measured relative to atmospheric pressure, while absolute pressure is measured relative to a vacuum reference. STG700 is intended for gauge pressure measurement; Honeywell's SmartLine STA700 is the corresponding absolute pressure family.
How accurate is the STG700?
Depending on the configuration, accuracy is available up to ±0.065% of span, with an optional accuracy level of ±0.04% of span.
How fast does the STG700 respond?
The SmartLine STG700 can provide a response time as fast as 100 ms, making it suitable for processes where pressure changes need to be detected quickly.
Can STG700 be used for boiler pressure measurement?
Yes. Boiler pressure measurement is one of the applications specifically identified by Honeywell for the STG700 gauge pressure transmitter.
Can it be used for tank level measurement?
Yes. STG700 can be used for tank level applications where gauge pressure is used to determine liquid level, particularly where the process temperature is relatively high.
Does STG700 support HART communication?
Yes. The SmartLine STG700 is available with HART 7 communication, as well as Honeywell DE and Foundation Fieldbus options depending on configuration.
Can STG700 be used in hazardous areas?
Yes. Depending on the ordered configuration, STG700 is available with approvals including FM, CSA, ATEX and IECEx, with SIL-certified configurations also available. The exact approval should be confirmed from the selected model and order code.
Does the STG700 have built-in diagnostics?
Yes. Honeywell specifies comprehensive onboard diagnostics with critical and non-critical diagnostic functions.
What should I consider when selecting an STG700?
The most important factors are the required pressure range, process connection, wetted materials, communication protocol, hazardous-area approval, display requirement and process temperature. The exact STG700 model should be selected according to the complete application and order code.
