GBCHT-BX Series: Flush Mount Pressure Sensing for Harsh and Sanitary Applications
- John Valentini
- Apr 23
- 2 min read
In applications where media exposure, sanitation, and mechanical robustness are critical, traditional pressure sensor designs often introduce compromises—particularly when oil-filled cavities or corrugated diaphragms are used. These limitations can impact long-term reliability, cleanliness, and compatibility with aggressive media.
The GBCHT-BX Series from AV Sensors addresses these challenges with a glass-bonded, flush-mounted diaphragm design, delivering stable, high-performance pressure measurement in demanding environments.
A True Flush-Mount, Non-Oil-Filled Design
At the core of the GBCHT-BX Series is a flush-mounted diaphragm with flange interface, eliminating cavities where media buildup or contamination can occur.
Key design elements include:
Flush diaphragm geometry for direct media contact
Flange-mounted configuration for simplified system integration
No oil-filled capsule, removing risk of leakage or contamination
No corrugated diaphragm, improving structural stability
This approach is particularly important in applications requiring cleanability, sterility, or resistance to viscous and particulate media .
Glass Bonded Construction for Rugged Performance
The GBCHT-BX Series utilizes a glass-bonded sensing structure, providing:
High mechanical strength
Excellent long-term stability
Resistance to pressure cycling and shock
Improved performance in harsh environments
Unlike oil-isolated designs, the glass-bonded architecture maintains direct force transfer to the sensing element, enabling consistent and repeatable output.
Engineered for Harsh Media Compatibility
The sensor is constructed with 316L stainless steel wetted materials, allowing compatibility with a wide range of industrial and sanitary media, including:
Refrigerants
Compressed air systems
Hydraulic fluids
Food and beverage process media
This material selection ensures durability while supporting corrosion resistance and regulatory compliance requirements in both industrial and medical environments .
Electrical and Performance Characteristics
The GBCHT-BX Series provides a temperature-compensated mV output optimized for stable operation under constant voltage excitation.
Key performance attributes include:
Full-scale span: ~50 mV output
Accuracy: ±1.0% FSS
Fast response time (~100 µs)
Low offset and thermal error characteristics
Wide operating temperature range: -40°C to 100°C
These characteristics make the sensor suitable for applications requiring fast response and stable measurement under dynamic conditions .
Designed for Direct Replacement of Legacy Platforms
The GBCHT-BX Series is engineered to serve as a replacement for legacy Honeywell BX Series sensors, while introducing improvements in:
Media isolation (non-oil-filled design)
Mechanical robustness
Sanitary compatibility
Long-term stability
This allows OEMs to upgrade performance while maintaining compatibility with existing system designs.
Application Focus
The GBCHT-BX Series is well suited for applications where media contact and cleanliness are critical, including:
Food and beverage processing systems
Smart valves and flow control devices
Medical instrumentation and OEM equipment
High-sanitary process environments
Its compact footprint and flange mounting make it particularly effective in systems where space and cleanliness constraints intersect.
Integration Simplicity
Designed with OEM integration in mind, the GBCHT-BX Series includes:
Pin termination connections for straightforward electrical interface
Standardized flange porting for mechanical consistency
Multiple pressure ranges (15 to 300 PSI) to support varied applications
This combination reduces engineering complexity while supporting scalable product designs.
Summary
The GBCHT-BX Series delivers a robust, flush-mounted pressure sensing solution by combining:
Glass-bonded sensor construction
Non-oil-filled, contamination-resistant design
316L stainless steel media compatibility
Fast, stable mV output performance
For OEMs operating in harsh, sanitary, or media-exposed environments, the GBCHT-BX Series provides a reliable and scalable platform for pressure measurement without the compromises of traditional designs.
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John Valentini, Business Development AV Sensors (business.development@avsensors.com)
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