This instrument measures air pressure in single-pipe systems or differential pressure between two pipes. It features a high-quality pressure sensor, high-accuracy ADC, and low-power consumption MCU. It is a multifunctional device with temperature and pressure measurement, data storage, low battery indicator, data hold, max/min value mode, and DIF mode. Suitable for use in ventilation and air conditioning systems, as well as gas measurement, calibration, and general pressure system diagnostics.Features: - High-quality pressure sensor, high-accuracy ADC, and low-power consumption MCU - Professional digital manometer for indoor temperature measurement with wide range, high resolution, and high accuracy - Multifunctional with temperature and pressure measurement, data storage, low battery alert, data hold, max/min mode, and DIF mode - Switchable between ℃ and ℉ - 12 selectable pressure units: mmHg, inHg, ftH₂O, cmH₂O, inH₂O, Pa, kPa, mbar, bar, psi, kg/cm², oz/in² - Large digital LCD display for clear reading - Real-time pressure measurement via single channel; differential pressure detection using dual channels - Ideal for HVAC system testing, gas pressure measurement, calibration, and pressure system diagnostics Specifications: - Name: Digital Manometer - Material: ABS - Display: LCD - Battery: 1 x 6F22, 9V, 250mAh (not included) - Pressure measurement range: ±2.999 psi - Accuracy: ±0.3% FSO (at 25°C) - Data storage capacity: 100 readings - Maximum pressure: 20 kPa - Temperature units: ℃/℉ switchable - Low battery indication: ≤6.8V - Auto power-off: 15 minutes after inactivity - Operating temperature: 0–50°C (32–132°F) - Storage temperature: -10°C to 60°C (14–140°F) - Device dimensions: 159 x 76 x 32 mm / 6.26 x 2.99 x 1.26 in - Carrying bag dimensions: 180 x 110 x 30 mm / 7.09 x 4.33 x 1.18 in - Device weight: 260 g / 9.17 oz - Package dimensions: 205 x 145 x 40 mm / 8.07 x 5.71 x 1.57 in - Package weight: 290 g / 10.23 oz Packing List: - 1 x Digital Manometer - 2 x Tubes - 1 x Adapter - 1 x User Guide - 1 x Carrying Bag