A water detecting pressure-sensing device includes a metal housing including a cavity. A pressure sensor is disposed on a die and configured to generate a signal in response to a pressure variation. A protection medium at least partially fills the cavity and covers the die. One or more electrodes are disposed on the die and are used to detect a presence of a water droplet on the protection medium.

A sensor drive circuit for driving a sensor with a current includes at least one circuit configured to generate a drive current for the sensor, the drive current having a reverse temperature characteristic with respect to a temperature characteristic of an output voltage of the sensor. A temperature characteristic of sensor sensitivity has a negative first order coefficient and a positive second order coefficient. The sensor drive circuit includes a first current source configured to generate a first current having a temperature characteristic of which a first order coefficient is positive. The sensor drive circuit includes a second current source configured to generate a second current having a temperature characteristic of which a first order coefficient is negative. The sensor drive circuit includes a first current calculator configured to add the first current and the second current to generate a third current.

In piezoelectric sensors, conventional amplification factor adjustment methods involving the cutting of a wiring pattern or use of a laser trimmable resistor are unable to adjust the amplification factor when the sensor is in a completed state. As a result, the production process becomes complex and production costs increase. Further, because the amplification factor adjustment is carried out in a different state from that of the finished product, the problem that the amplification factor is not set correctly in the finished product also occurs. A non-volatile memory is incorporated in an integrated circuit in which there are integrated piezoelectric sensor circuit elements. The amplification factor is adjusted by writing data from a writing terminal to change an amplification resistor a.

In piezoelectric sensors, conventional amplification factor adjustment methods involving the cutting of a wiring pattern or use of a laser trimmable resistor are unable to adjust the amplification factor when the sensor is in a completed state. As a result, the production process becomes complex and production costs increase. Further, because the amplification factor adjustment is carried out in a different state from that of the finished product, the problem that the amplification factor is not set correctly in the finished product also occurs. A non-volatile memory is incorporated in an integrated circuit in which there are integrated piezoelectric sensor circuit elements. The amplification factor is adjusted by writing data from a writing terminal to change an amplification resistor a.

Disclosed is an electronic vaporizing device chip with air pressure sensing unit and working method thereof, where the chip includes an air pressure sensing unit, a control unit, a plurality of auxiliary resistors, a capacitor, and a plurality of pins, the air pressure sensing unit is configured to detect an air pressure generated inside the electronic vaporizing device during suction, a signal amplification module is configured to amplify and then transmit an air pressure analog signal detected by the air pressure sensing unit to an analog-to-digital conversion module, the analog-to-digital conversion module converts the air pressure analog signal into an air pressure digital signal, a data processing and calibration module processes and calibrates the air pressure digital signal and then converts it into an air flow quantity digital signal; the advantage is that an air pressure sensing function and an air flow quantity calculating function are combined.

Disclosed is an electronic vaporizing device chip with air pressure sensing unit and working method thereof, where the chip includes an air pressure sensing unit, a control unit, a plurality of auxiliary resistors, a capacitor, and a plurality of pins, the air pressure sensing unit is configured to detect an air pressure generated inside the electronic vaporizing device during suction, a signal amplification module is configured to amplify and then transmit an air pressure analog signal detected by the air pressure sensing unit to an analog-to-digital conversion module, the analog-to-digital conversion module converts the air pressure analog signal into an air pressure digital signal, a data processing and calibration module processes and calibrates the air pressure digital signal and then converts it into an air flow quantity digital signal; the advantage is that an air pressure sensing function and an air flow quantity calculating function are combined.

[Problem] To provide a pressure sensor that has a plurality of detection parts in a lamination direction, and moreover has improved detection accuracy. [Solution] A pressure sensor 10 has a membrane 22 in which deformation corresponding to pressure occurs, a first gauge layer 40 which is formed on the membrane 22, an intermediate insulation layer 50 which is formed on the first gauge layer 40, and a second gauge layer 60 which is formed on the intermediate insulation layer 50. The first gauge layer 40 and the second gauge layer 60 respectively include a first detection part 42 and a second detection part 62 which detect the deformation of the membrane. The distance from the surface of the membrane 22 to the second detection part 62 is no more than 30 μm.

[Problem] To provide a pressure sensor that has a plurality of detection parts in a lamination direction, and moreover has improved detection accuracy. [Solution] A pressure sensor 10 has a membrane 22 in which deformation corresponding to pressure occurs, a first gauge layer 40 which is formed on the membrane 22, an intermediate insulation layer 50 which is formed on the first gauge layer 40, and a second gauge layer 60 which is formed on the intermediate insulation layer 50. The first gauge layer 40 and the second gauge layer 60 respectively include a first detection part 42 and a second detection part 62 which detect the deformation of the membrane. The distance from the surface of the membrane 22 to the second detection part 62 is no more than 30 μm.

A system and method of analyzing duct pressure within a pipe allows for monitoring and detecting vacuum pressure of gases. The system includes a pressure monitor and a target duct. The pressure monitor preferably includes an alarm light, a speaker, a sensing light, an alert indicator, and a battery alert. The method begins by periodically capturing a plurality of pressure readings inside the target duct with the pressure monitor. Each pressure reading is logged with the pressure monitor. Each pressure reading is compared to each situational alert with the pressure monitor to identify at least one matching alert for at least one specific reading. The matching alert is from the plurality of situational alerts. The specific reading is from the plurality of pressure readings. The matching alert is visually and/or audibly outputted with the pressure monitor, if the matching alert is identified for the specific reading.

A system and method of analyzing duct pressure within a pipe allows for monitoring and detecting vacuum pressure of gases. The system includes a pressure monitor and a target duct. The pressure monitor preferably includes an alarm light, a speaker, a sensing light, an alert indicator, and a battery alert. The method begins by periodically capturing a plurality of pressure readings inside the target duct with the pressure monitor. Each pressure reading is logged with the pressure monitor. Each pressure reading is compared to each situational alert with the pressure monitor to identify at least one matching alert for at least one specific reading. The matching alert is from the plurality of situational alerts. The specific reading is from the plurality of pressure readings. The matching alert is visually and/or audibly outputted with the pressure monitor, if the matching alert is identified for the specific reading.