This instrument can measure the air pressure of the single-pipe, or differential pressure of two pipes. Adopts quality pressure sensor, high accurate ADC and low power consumption MCU. Multifunctional, with temperature/pressure measurement and store function, low electricity remind function, data hold function, max/min value mode, DIF mode and etc.. It is suitable for measuring of ventilation and air condition system, and widely use for gas measurement, calibration, and other troubles of pressure system. Features: 1. ?? and ?H can be switched.2. Wide range, high resolution and high measurement accuracy.3. Equipped with digital display, easy to read.4. Adopt high-quality pressure sensor, high-precision ADC and low-power MCU.5. With temperature/pressure measurement and storage function, low battery reminder function, data retention function and other functions.6. There are 12 adjustable pressure units, which can be adjusted to mmHg, inHg, ftH?O, cmH?O, inH?O, Pa, KPa, mbar, bar, psi, Kgcm2 and ozin2.7. Quickly measure the real-time pressure value through a single channel, and detect the pressure difference between the two detection ports through a dual channel.8. It is suitable for the measurement of ventilation and air-conditioning systems, and is widely used for gas measurement and calibration of pressure systems. Specifications: