Tilswall Air Pressure Meter, Dual-Port HVAC Digital ManometerLarge LCD Screen for Easy Reading The clear digital LCD display shows test results instantly and helps prevent eye strain, making it comfortable for continuous use. High Accuracy Measurement Offers a wide measuring range of 20. 68 kPa 2. 999 psi with 0. 3% FSO accuracy at 25C, ensuring precise readings for both professional and home applications. Reliable and Consistent Performance With repeatability of 0. 2% (max 0. 5% FSO) and linearity hysteresis