Air Pressure, Differential Pressure, Negative Pressure and Micro-Differential Pressure Measurement | Firstrate Air Differential Pressure Transmitters Handle It All for You!

Air differential pressure transmitter is a precision instrument specially used to measure the pressure difference between two points of air or neutral gas and convert it into standard electrical signals. During monitoring, it can also be linked with the control system to realize automatic adjustment and abnormal alarm. With high precision and high stability, it has become a standard choice for differential pressure monitoring and is suitable for various industrial and building intelligent needs.

Air Differential Pressure Transmitter
This air differential pressure transmitter is specially designed for weakly corrosive and dry gases, with a standard measuring range of 0~0.5~100KPa, and special measuring ranges can be customized according to requirements.
It supports multiple signal outputs such as 4~20mA, 0~5V and RS485, with an optional comprehensive accuracy of ±0.5%FS or ±1%FS. In addition, it can be equipped with digital display and button operation functions, featuring simple installation and convenient operation.

The electrical connection adopts direct lead-out mode, the pressure interface is M10×1.5, and the front end is equipped with a Φ8 tower-type air pressure connector. The connecting thread is made of aluminum alloy, which is easy to install and corrosion-resistant. It is suitable for differential pressure monitoring scenarios such as dry gas pressure, air inlet duct pressure, indoor and outdoor differential pressure, cotton box of cotton spinning machines, and elevator front room pressure.

Micro-Differential Pressure Sensor
This micro-differential pressure sensor covers a measuring range of -10~10kPa and supports multiple signal outputs including 4~20mA, 0~5V, 0~10V and RS485, which can be flexibly adapted to different industrial control systems.
The comprehensive accuracy reaches ±1%FS, and the resolution is optimized according to different scenarios: 0.1Pa for measuring ranges <1kPa and 1Pa for measuring ranges ≥1kPa, ensuring fine and reliable measurement; the response time is ≤0.5s, which can capture differential pressure changes in real time.
It is widely used in micro-differential pressure monitoring scenarios such as building automation, clean rooms and industrial ventilation, making it an ideal choice for high-precision and high-stability differential pressure monitoring.

Product Advantages
Industrial-grade chip: Adopting high-performance industrial-grade sensing chips with excellent impact resistance, overload resistance, vibration resistance and corrosion resistance, effectively prolonging the service life of the product.
High-precision measurement: The comprehensive accuracy can reach ±0.5%FS/±1%FS, and the resolution can reach 0.1Pa, accurately capturing tiny differential pressure changes.
Strong anti-interference ability: The product is designed with efficient lightning protection, strong radio frequency and electromagnetic interference resistance, as well as surge protection and reverse polarity protection functions, suitable for complex industrial environments.
Customizable measuring range: Standard measuring ranges from -10kPa to 100kPa are available, and special measuring ranges can be customized according to requirements.
Good stability: Equipped with advanced temperature compensation technology, the long-term measurement drift is small. Efficient lightning protection and strong radio frequency and electromagnetic interference protection ensure more stable operation.
Easy installation and use: Standardized interfaces, simple wiring, support for digital display and button operation, flexible optional signal output, support for rapid deployment, reducing construction and maintenance costs.
Common Application Scenarios

Specially designed for weakly corrosive and dry gases, Firstrate air differential pressure transmitters are widely used in the following core scenarios with their high precision, strong anti-interference and reliable stability:
I. Building Automation and HVAC
Duct differential pressure monitoring: Real-time monitoring of air inlet duct pressure, linking with fans to adjust air volume, ensuring ventilation efficiency and energy consumption optimization.
Filter blockage alarm: Prompt dust accumulation on air conditioning/ventilation filters through differential pressure changes, and timely maintenance to avoid air volume attenuation.
Indoor and outdoor differential pressure control: Maintain positive and negative pressure environments in clean rooms, laboratories, hospital operating rooms and other places to prevent pollution penetration.
Fire residual pressure monitoring: Monitor the pressure of stairwells and elevator front rooms to ensure reasonable air pressure in evacuation passages in case of fire and guarantee safe personnel escape.
II. Industrial Production and Environmental Protection
Cotton box pressure monitoring of cotton spinning machines: Precisely control the air pressure in the cotton box, stabilize the thickness of the cotton layer, and improve the quality of textile finished products and production efficiency.
Detect the differential pressure between inlet and outlet of dust removal equipment: Early warning of filter bag blockage to ensure up-to-standard waste gas treatment.
Boiler/kiln ventilation control: Monitor secondary air differential pressure, optimize combustion efficiency, and reduce energy consumption and pollutant emissions.
III. Medical and Clean Environments
Differential pressure of biosafety cabinets/clean rooms: Maintain positive and negative pressure in key areas to prevent cross-infection and ensure the safety of experimental and diagnosis and treatment environments.
Airway monitoring of ventilators/anesthesia machines: Sense airway differential pressure changes in real time to ensure the safe operation of equipment and stable breathing of patients.
IV. Urban Infrastructure and Public Safety
Underground pipe gallery/tunnel ventilation: Monitor the differential pressure of ventilation pipelines to ensure air circulation in closed spaces and improve the operation safety of facilities.
Air pressure control of civil air defense projects: Maintain stable air pressure inside the project to ensure the living environment of personnel in emergency situations.