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1) Temperature - NTC
Measuring range: -20 to +70 °C
Accuracy: ±0.5 °C (0 to +70 °C); ±0.8 °C (-20 to +0 °C)
2) Humidity - Capacitive
Measuring range: 0 to 100 %rH
Accuracy: ±1.8 %RH + 3 % of mv at +25 °C (5 to 80 %rH)
3) Differential Pressure
Measuring range: -120 to +120 Pa
Accuracy: ±2 % of mv + 0.5 Pa at +22 °C, 1013 hPa
4) Absolute Pressure
Measuring range: 700 to 1100 hPa
Accuracy: ±3 hPa
5) Volume flow
Measuring range: 40 to 4000 m³/h
Accuracy: ±3 % of mv + 12 m³/h at +22 °C; 1013 hPa (85 to 3500 m³/h)
6) General technical data
Battery type: Alkaline, type AA
Battery life: 40 h
Interface: Micro-USB; Bluetooth® 4.0 wireless technology
Memory: 2 GB (internal)
Dimension: 610 x 610 mm
Weight: 2900 g
Included: testo 420 accurate, lightweight flow hood base with Bluetooth; USB cable, batteries, soft case w/ telescoping handle and wheels
