"Always ready for your pressure measurement needs - the testo 510 differential manometer Achieve rapid and precise measurements at any job site with the testo 510 pressure meter. The compact HVAC/R tool accurately measures total external static pressure, differential pressure, duct velocities and manifold pressure on air conditioning systems and ventilation ducts. Combined with an optional pitot tube, the dual-port manometer also measures airflow. Its diverse range of units allows for particularly versatile measurements. Choose between hPa, mbar, PA mmH2O, INHg, mmHg, psi, m/s and fpm and achieve precise and dependable data. The intuitive design, backlit display and practical accessories, such as the belt pouch and wrist strap provide a quick and convenient application. Technical Data: Differential pressure measuring range: 0 to 40 InH₂O / 0 to 100 hPa Differential pressure measurement accuracy: ±0.01 InH₂O (0 to 0.12 InH₂O) / ±0.03 hPa (0 to 0.30 hPa); ±0.02 InH₂O (0.12 to 0.40 InH₂O) / ±0.05 hPa (0.31 to 1.00 hPa); ±(0.0 InH₂O + 1.5 % of mv) (0.40 to 40 InH₂O) / ±(0.1 hPa + 1.5 % of mv) (1.01 to 100 hPa) Dimensions: 5 x 2 x 1 in. / 119 x 46 x 25 mm Protection class: IP40 Selectable units: hPa, mbar, PA mmH2O, INHg, mmHg, psi, m/s and fpm Maximal static pressure: 7.252 psi / 500 mbar Measuring rate: 0.5 seconds Battery type: 2 x AAA batteries Battery life: 50 h (average, without display illumination) Weight: 3 oz. (with batteries and protective cap) / 90 g (with batteries and protective cap) Scope of Delivery: ✓ testo 510 including batteries ✓ Belt pouch ✓ 2 x hoses ✓ Wrist strap ✓ Certificate of conformity"