This instrument measures air pressure in single-pipe systems or differential pressure across two pipes. It features a 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 indication, 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 MCU - Professional digital manometer for indoor temperature measurement with wide range, high resolution, and high accuracy - Supports temperature and pressure measurement with data storage, low battery alert, data hold, max/min mode, and DIF mode - Switchable between and - 12 selectable pressure units: mmHg, inHg, ftHO, cmHO, inHO, Pa, kPa, mbar, bar, psi, kg/cm, oz/in - 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 25C) - Data storage capacity: 100 readings - Maximum pressure: 20 kPa - Temperature units: / switchable - Low battery indicator: 6.8V - Auto power-off: 15 minutes after inactivity - Operating temperature: 050C (32132F) - Storage temperature: -10C to 60C (14140F) - 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 Tube - 1 x Adapter - 1 x User Guide - 1 x Carrying Bag