What are the main sensors in the ventilator?

The ventilator is mainly used for the treatment of various patients with symptoms of sleep apnea. During sleep, the muscles usually relax naturally, causing the upper airway to narrow. This will reduce the amount of oxygen in the blood and cause it to wake up from sleep. In the long run, it will not only seriously affect sleep, but also bring inconvenience to work and life. It may even cause various respiratory diseases and threaten your health. The following types of sensors are commonly used in ventilators: pressure sensors, temperature and humidity sensors, and air flow sensors.

Various types of sensors in the ventilator

Pressure Sensor

In the ventilator, the pressure sensor mainly converts the airway pressure into a differential signal, and the measured value is given to the circuit MCU to accurately make the inspiratory and exhalation judgments. The MCU then issues commands to control the intake pump to increase or decrease the line pressure. The patient's breathing is naturally smooth and does not create a sense of resistance.

The TBP series pressure sensor is a new type of temperature-compensated non-amplified silicon pressure sensor from Honeywell. It has high repeatability, high precision and high reliability under different environmental conditions. Various medical pressure measurement applications.

Temperature and humidity sensor

The temperature and humidity sensor is mainly used to measure the temperature and humidity of the air in the pipeline in the ventilator, and adjust the temperature and humidity of the incoming gas to provide the user with suitable temperature and humidity air, so that the patient feels natural comfort and improves sleep. quality.

The new Honeywell HIH8000 temperature and humidity sensor uses laser-corrected, thermoset polymer capacitive sensing elements. The multi-layer construction of the components protects against most application hazards such as condensation, dirt, dust, oil and common environmental chemicals, helping to provide industry-leading stability and reliability.

Air flow sensor

The air flow sensor is mainly used to measure the flow rate of the gas to determine the breathing rhythm of the user during sleep. According to the speed of the patient's breathing, the ventilation speed of the ventilator can be controlled to keep the patient's breathing and intake frequency consistent. This can not only ensure that the breathing is natural and smooth, but also effectively reduce the workload of the air pump and save energy.

Honeywell's Zephyr HAF Series air flow sensors provide a digital interface for reading airflow data over a specified full-scale flow range and temperature range. Their adiabatic heaters and temperature sensing elements help the sensor respond quickly to air or other airflow. Zephyr sensors are designed to measure the mass flow of air and other non-corrosive gases. They use a standard flow measurement range, are fully calibrated, and utilize a "professional integrated circuit designed for temperature compensation on the board.

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