TESTO 521-3 Differential pressure measuring instrument up to 2.5 hPa specifications :

Temperature – NTC :

• Measuring range : -40 to +150 °C
• Accuracy :±0.2 °C (-10 to +50 °C)±0.4 °C (Remaining Range)
• Resolution : 0.1 °C

Temperature – TC Type K (NiCr-Ni) :

• Measuring range : -200 to +1370 °C
• Accuracy :±0.4 °C (-100 to +200 °C)±1 °C (Remaining Range)
• Resolution : 0.1 °C

Differential pressure (internal sensor) – Piezoresistive :

• Measuring range : 0 to 2.5 hPa
• Accuracy :±0.5 Pa (0 to 20 Pa)±(0.5 Pa ±0.5 % of mv) (20.1 to 250 Pa)
• Resolution : 0.1 Pa
• Static pressure : 1000 hPa
• Overload : 50 hPa
• Zeroing : to 0.5 hPa