Testo 420

Product Highlights

• Differential pressure measurement, useful for checking filters in air conditioning and ventilation systems  Calculate flow velocity and volume flow using an optional pitot tube  Save measurement data for analysis and documentation  Match with a Testo CEC compliant air flow capture hood to measure volume flows at supplies and returns (0563 4200)
• Differential Pressure:
• Measuring range -0.480 to 0.480 InH₂O / -120 to +120 Pa +19.7 to +2756 fpm / +0.1 to +14 m/s
• Accuracy ±2 % of mv + 0.002 InH₂O at +72 °F, 405 InH₂O / ±2 % of mv + 0.5 Pa at +22 °C, 1013 hPa
• Resolution 0.001 InH₂O / 0.001 Pa 0.01 fpm / 0.01 m/s
• Reaction time 1 sec (t90)
• Absolute Pressure
• Measuring range 280 to 440 InH₂O / 700 to 1100 hPa
• Accuracy ±1 InH₂O / ±3 hPa
• Resolution 0.1 InH₂O / 0.1 hPa
• Reaction time 1 sec
• Dimensions 6 x 3 x 1 in. / 150 x 85 x 35 mm
• Operating temperature 23° to 122 °F / -5 to +50 °C
• EU-/EG-guidelines EU-guideline 2014/30/EU
• Battery type Alkaline, type AA
• Battery life 40 h
• Display size 3.5"
• Display function Dot matrix
• Display ligthing with illumination
• Interface Micro-USB
• Memory 2 GB (internal)
• Storage temperature -4° to 140 °F / -20 to +60 °C

Each Unit Includes

• Testo 420 differential pressure measuring instrument
• Batteries
• Certificate of calibration