Testo 521-1 Differential Pressure Instrument: Pressure Range 0–100 hPa, Accuracy ±0.2% FS, Velocity 5–100 m/s

The Testo 521-1 is a high-precision differential pressure measuring instrument designed for applications in air conditioning and ventilation systems. It features an integrated differential pressure sensor with an accuracy of ±0.2% of full-scale value (FS), making it ideal for tasks such as monitoring pressure drops across filters, checking fan and extractor performance, and conducting Pitot tube measurements to determine flow velocity.

Key Features:

• Integrated Differential Pressure Sensor: Measures pressure ranges from 0 to 100 hPa with high accuracy.
• Flow Velocity and Volume Flow Calculation: When used with an optional Pitot tube, it calculates flow velocities between 5 to 100 m/s and corresponding volume flows.
• Multi-Point and Timed Mean Calculation: Allows for comprehensive analysis by averaging multiple measurements over time.
• Additional Probe Inputs: Equipped with two inputs for connecting external pressure and temperature probes, enhancing measurement versatility.
• Data Storage and Analysis: Capable of storing measurement data for subsequent analysis on a PC or on-site printing using the optional Testo printer.

Technical Specifications:

• Differential Pressure Measurement:
  • Range: 0 to 100 hPa
  • Accuracy: ±0.2% of full-scale value
  • Resolution: 0.01 hPa
  • Overload Capacity: Up to 300 hPa
• Flow Velocity Measurement (with Pitot Tube):
  • Range: 5 to 100 m/s
• Temperature Measurement (with External Probe):
  • NTC Probe Range: -40 to +150°C
  • Type K Thermocouple Range: -200 to +1370°C
• General Specifications:
  • Dimensions: 219 x 68 x 50 mm
  • Operating Temperature: 0 to +50°C
  • Storage Temperature: -20 to +70°C
  • Battery Type: 9V block battery
  • Battery Life: Approximately 30 hours with internal pressure sensor
  • Display: LCD with 7-segment and point matrix
  • Memory Capacity: Up to 25,000 measurement values
  • Interface: RS232 for data transfer

Applications:

• HVAC Systems: Monitoring differential pressure to assess filter conditions and ensure optimal airflow.
• Industrial Ventilation: Evaluating fan and extractor performance by measuring pressure differences.
• Cleanroom Monitoring: Ensuring compliance with pressure differential requirements to maintain contamination control.
• Process Engineering: Conducting flow measurements in ducts and pipelines using Pitot tubes.