Differential Pressure Meter
Product Details:
The highly accurate differential pressure meter, testo 521, with an internal pressure sensor from 0 to 100 hPa is ideal for Pitot tube measurements in the range 5 to 100 m/s. testo 521 is available in 2 accuracy classes. testo 521-1 with an internal pressure sensor with Class 0.2, testo 521-2 with an internal pressure sensor with Class 0.1. In the case of velocity speeds in the range from 1 to 12 m/s, you can carry out accurate measurements using the 100 Pa probe which can be attached externally.
Features :

• Multi-point and timed mean calculation
• Density compensation
  
• Up to two 4 to 20 mA interfaces connectable to hand-held instr.
• 1 analog signal can be evaluated per interface
  
• Scaling of analog signal in hand-held instrument
• Transmitter can be supplied with power from testo 521, for example
  
• 4 to 20 mA interface can be connected to testo 521, 526, 400, 650 und 950 hand-held instruments
• Two user-defined probe inputs allow the connection of external probes for pressure, temperature, current/voltage
• Temp. compensated differential pressure sensor in instrument
  
• Additional 2 probe sockets for measuring pressure and temp.
• Direct calculation of velocity speed and volume flow