Advanced Pressure Measurement with Remote Diaphragm Seal Technology

The Honeywell SmartLine STR800 is a remote diaphragm seal pressure transmitter designed to provide accurate pressure measurement in applications where standard pressure transmitters may not be suitable.

By using a remote diaphragm seal system, the transmitter isolates the sensing element from the process medium while transferring pressure through a filled capillary system. This design helps protect the transmitter from aggressive, high-temperature, crystallizing or highly viscous media.

The STR800 is available for:

• 
  Differential pressure measurement
  
• 
  Gauge pressure measurement
  
• 
  Absolute pressure measurement
  

Typical applications include:

• 
  Chemical processing
  
• 
  Petrochemical and refining
  
• 
  Oil and gas production
  
• 
  Power generation
  
• 
  Pharmaceutical and hygienic processes
  
• 
  High-temperature process systems
  

Designed for Corrosive and Difficult Process Media

Many industrial processes involve fluids that can damage conventional pressure transmitters or create measurement instability.

The STR800 remote diaphragm configuration allows the transmitter to handle difficult process conditions by keeping the sensing element separated from the process fluid.

Advantages include:

• 
  Protection against corrosive media
  
• 
  Suitable for high-temperature fluids
  
• 
  Reduced risk from plugging or coating
  
• 
  Better compatibility with viscous materials
  
• 
  Easier measurement of aggressive process chemicals
  

Available diaphragm seal options include:

• 
  Flush flange seals
  
• 
  Extended diaphragm seals
  
• 
  Pancake seals
  
• 
  Chemical tee seals
  
• 
  Threaded process connections
  
• 
  Sanitary seals
  
• 
  Saddle seals
  

This wide range of seal configurations allows the transmitter to be adapted to different industrial requirements.

High Accuracy and Smart Sensor Technology

The STR800 uses Honeywell SmartLine high-performance sensor technology, combining pressure measurement with onboard compensation functions.

The transmitter integrates:

• 
  High-performance piezoresistive sensor technology
  
• 
  Automatic static pressure compensation
  
• 
  Automatic temperature compensation
  
• 
  Comprehensive onboard diagnostics
  

With accuracy up to 0.0375% of span and rangeability up to 100:1, the STR800 provides stable measurement performance for critical process control applications.

Flexible Configuration for Different Pressure Applications

The STR800 product family includes different models to cover a wide range of pressure measurement requirements.

Available models include:

• 
  STR82D – Differential pressure measurement
  
• 
  STR83D – Gauge pressure measurement
  
• 
  STR84D / STR87D – Higher pressure differential or gauge applications
  
• 
  STR84A – Absolute pressure measurement
  

Depending on the selected model and construction, measurement ranges can support applications up to 3000 psi (210 bar) maximum allowable working pressure.

Multiple Communication Options and Easy Integration

The SmartLine STR800 supports common industrial communication protocols for integration into modern automation systems.

Available communication options include:

• 
  4…20 mA with HART 7
  
• 
  Honeywell Digitally Enhanced (DE)
  
• 
  FOUNDATION Fieldbus
  

The transmitter also supports local configuration through external zero, span and configuration functions, helping simplify commissioning and maintenance.

Safety, Diagnostics and Industrial Reliability

The STR800 is designed for reliable operation in demanding industrial environments.

Integrated features include:

• 
  Advanced onboard diagnostics
  
• 
  Overpressure protection
  
• 
  SIL 2/3 compliant safety capability
  
• 
  Explosion protection approvals
  
• 
  Marine certification options
  

Available approvals include:

• 
  FM
  
• 
  CSA
  
• 
  ATEX
  
• 
  IECEx
  
• 
  NEPSI
  
• 
  Other regional certifications depending on configuration
  

These features make the STR800 suitable for safety-critical and hazardous area applications.

Applications Across Industrial Industries

Chemical Industry

The STR800 is suitable for measuring pressure in chemical processes where aggressive or corrosive media may affect conventional transmitters.

Applications:

• 
  Reactor pressure monitoring
  
• 
  Chemical storage tanks
  
• 
  Process pressure control
  
• 
  Corrosive fluid measurement
  

Oil and Gas Industry

Remote diaphragm seals provide reliable pressure measurement in challenging oil and gas applications.

Applications:

• 
  Refining processes
  
• 
  Pipeline systems
  
• 
  High-temperature fluids
  
• 
  Hydrocarbon processing
  

Power Generation

The transmitter can be used in power plants for reliable pressure monitoring.

Applications:

• 
  Steam systems
  
• 
  Boiler applications
  
• 
  High-temperature process measurement
  
• 
  Utility systems
  

Pharmaceutical and Hygienic Processes

With suitable diaphragm seal configurations, the STR800 can support applications requiring clean process connections.

Applications:

• 
  Hygienic process monitoring
  
• 
  Sterile process systems
  
• 
  Pharmaceutical production equipment