Manufacturer: Fuji Ceramics Co., Ltd.
Model: FKS-111

Features

• This ultra-sensitive sensor detects minute pressure changes in air and gas.
• It has a wide detection range, from 1 Pa to 100 kPa.

Specifications

• This sensor is capable of detecting extremely small variations in air pressure (as low as 1 Pa), which is not detectable by standard sensors. It can also detect large air pressure variations up to 100 kPa.
• Compared to traditional thin-film sensors, this sensor is more cost-effective and highly sensitive.
• The sensor elements are designed to effectively protect against pressure damage, offering excellent protection for the component.
• The sensor incorporates a FET anti-interference circuit, converting the signal into an output voltage that can be easily used.

◆Operating Principle

• Thermal contraction of air in a sealed container is caused by temperature changes.
• When sealed in a thermal wall, the container contracts due to external motion and pressure, lowering the air temperature.
• The contraction from outside the container reduces air volume and temperature.
• Sealing the window causes thermal seal contraction, leading to temperature changes detectable as pressure variations.

◆Applications

• Used for detecting the opening and closing of doors and windows, for automotive or home security systems.
• Used in vehicle GPS systems, especially when the vehicle is in a parked or idle state.
• Used in hospitals to monitor human movement in designated safe zones, especially for preventing people from falling into swimming pools or other hazardous areas.
• For applications requiring detection of air quality or home automation, this sensor can also be used for safety protection, industrial monitoring, and more.

◆Representative Features

◆Equivalent Circuit Diagram