This instrument can measure the air pressure of a single pipe or the differential pressure of two pipes. Adopts high-quality pressure sensor, high-precision ADC and low power consumption MCU. Multifunctional, with temperature/pressure measurement and storage function, low battery reminder function, data hold function, max/min value mode, DIF mode, etc. It is suitable for ventilation and air conditioning measurement and widely used for gas measurement, calibration and other problems in pressure systems. Features: Adopts high-quality pressure sensor, high-precision ADC and low power consumption MCU. Professional digital pressure gauge for indoor temperature measurement, with wide range, high resolution and high measurement accuracy. Multifunctional, with temperature/pressure measurement and storage function, low battery reminder function, data hold function, max/min value mode, DIF mode, etc. ℃ and ℉ can be switched. There are 12 adjustable pressure units, you can adjust to mmHg, inHg, ftH₂O, cmH₂O, inH₂O, Pa, KPa, mbar, bar, psi, Kgcm² and ozin². Equipped with large digital display, you can see the data clearly. Quickly measures real-time pressure value through a single channel and detects the pressure difference between two detection portals through two channels. It is suitable for ventilation and air conditioning measurement and widely used for gas measurement, calibration and other problems in pressure systems. Specifications: Name: Digital Pressure Gauge Material: ABS Display: LCD Battery: 1 * 6F22 battery, 9V, 250mAh (not included) Pressure measurement range: ±2.999psi Accuracy: ±0.3%FSO (at 25℃) Data storage quantity: 100 Max pressure: 20KPa Units: ℃/℉ switchable Low battery reminder: ≤6.8V Automatic shutdown: 15min after no operation Working temperature: 0-50℃(32-132℉) Storage temperature: -10℃ to 60℃(14-140℉) Item size: 159 * 76 * 32mm / 6.26 * 2.99 * 1.26in Carry bag size: 180 * 110 * 30mm / 7.09 * 4.33 * 1.18in Item weight: 260g / 9.17ounce Package size: 205 * 145 * 40mm / 8.07 * 5.71 * 1.57in Package weight: 290g / 10.23ounce Packing List: 1 * Digital Pressure Gauge 2 * Hose 1 * Adapter 1 * Instruction 1 * Carry Bag