In the field of precision industrial measurement, the CFBHM sensor, with its breakthrough structural design, has become the industry's first small-sized sensor to achieve 10x overload protection. This article analyzes how this coin-type pressure sensor stands out among products in the same series such as EVT-14 and NOS-W401 from core technical dimensions including material mechanics and strain gauge layout, providing technical evaluators with key performance verification data.

I. Dual Breakthroughs in Materials Science and Structural Design

The core advantage of the CFBHM sensor is first reflected in its selection of special alloy materials. Unlike conventional NOS-F305 or HDW209 sensors that use 304 stainless steel, CFBHM uses specially heat-treated 17-4PH precipitation-hardening stainless steel, with a yield strength of over 1100MPa, which is 2.3x that of ordinary materials. This material performed exceptionally well in cyclic load testing at the Xi'an Shenghongchuang laboratory, maintaining a linearity of 0.05%FS even after 100,000 impacts at 10x rated load.

In terms of structural design, CFBHM innovatively adopts a "sandwich" strain body architecture:

• Upper strain layer: 0.1mm ultra-thin design, ensuring high sensitivity
• Middle buffer layer: Flexible ceramic composite material, absorbing impact energy
• Base reinforcement layer: Integrated forged structure with honeycomb lightweight holes

This design makes its overload protection performance significantly superior to traditional coin-type sensors such as RSW13, with energy absorption efficiency increased by 47% under the same 15mm diameter size.

II. Innovations in Strain Gauge Layout and Signal Processing Technology

2.1 Full-Bridge Strain Gauge Topology Optimization

The CFBHM sensor abandons the conventional cross-shaped layout used by EVT-14 and instead adopts a patented "star-radial" strain gauge arrangement. Eight groups of strain gauges are evenly distributed at 22.5° intervals, combined with resistors featuring an ultra-low temperature coefficient of 0.0005Ω, achieving:

2.2 Intelligent Compensation Algorithm

The built-in ASIC chip uses an adaptive Kalman filtering algorithm, enabling real-time compensation for nonlinear errors caused by overload. Test data shows that after 10x overload, the recovery time of CFBHM is only 12ms, while the CHM1 sensor requires more than 80ms. This rapid recovery characteristic makes it particularly suitable for industrial scenarios with impact loads, such as injection molding machines and stamping equipment.

III. Comparative Analysis of Performance with Products in the Same Series

By comparing the key parameters of CFBHM with mainstream miniature force sensors such as RSW10B and NOS-W401, its technical advantages can be clearly seen:

• Overload protection factor: CFBHM reaches 10x, while the standard for the CFBH series is 5x
• Size-to-accuracy ratio: Under the same 15mm diameter, the measuring range of CFBHM can reach 500kg, which is 1.8x that of HDW209
• Long-term stability: After a 1000-hour aging test, the drift of CFBHM is only 0.02%FS, better than the industry standard of 0.1%FS

Especially in fields with extremely high requirements for space and reliability, such as medical robots and semiconductor equipment, the small-sized sensor characteristics of CFBHM (with a thickness of only 4.5mm) combined with its overload resistance create a unique technical advantage.

IV. Verified Cases in Industrial Scenarios

In the pressure monitoring system of a certain automotive parts production line, after replacing the original NOS-F305 sensor with CFBHM:

1. The sensor failure rate caused by overload dropped from 3.2 times per month to zero
2. The equipment maintenance cycle was extended from 2 weeks to 6 months
3. The overall MTBF (mean time between failures) of the measurement system increased to 8000 hours

This case fully verifies the reliability of CFBHM in harsh industrial environments, and its performance indicators fully comply with the latest requirements of the ISO 376:2011 standard for force sensors.

V. Summary and Technical Outlook

Through the triple technological breakthroughs of material innovation, structural optimization, and intelligent algorithms, the CFBHM sensor has redefined the performance benchmark for miniature force sensors. For technical evaluators, when selecting coin-type pressure sensors, special attention should be paid to:

• The degree of matching between the overload protection factor and actual operating conditions
• Energy density indicators under small dimensions
• Signal fidelity under dynamic loads

As a national high-tech enterprise, Xi'an Shenghongchuang Instrument Co., Ltd. will continue to promote the iterative upgrading of the CFBHM series sensors. We sincerely invite technical experts from all industries to visit and explore the innovative applications of miniature sensors in intelligent equipment. Contact our engineering team now to obtain customized sensor solutions.