Overview

The Testo 440 dP is a precise and reliable measuring instrument for all air velocity and IAQ parameters. Its intuitive operation is enhanced by an integrated differential pressure sensor and clearly structured measurement menus.

This single device simplifies adjusting air conditioning and ventilation systems, monitoring air quality, and performing comfort level measurements. It supports a wide range of high-quality digital probes, offering versatile measurement capabilities without the need for multiple tools.

The integrated differential pressure sensor allows for essential filter and fan measurements, as well as Pitot tube and K-factor determinations, making it a comprehensive solution for HVAC professionals.

Why It Matters

Efficiently manage HVAC and IAQ tasks with a single, versatile tool. The Testo 440 dP streamlines complex measurements, reduces equipment needs, and enhances accuracy, ensuring optimal system performance and occupant comfort.

What's Included

• Testo 440 dP air velocity and IAQ measuring instrument with integrated differential pressure sensor
• Connection hose
• 3 AA batteries
• USB cable
• Calibration protocol

Features & Benefits

• Integrated differential pressure sensor for Pitot tube measurements and filter monitoring.
• Extendable with a wide range of digital and Bluetooth probes (sold separately) for comprehensive parameter measurement.
• Wireless measurement capability with Bluetooth probes, reducing cable clutter and extending reach up to 65 feet.
• Intuitive, structured measurement menus for quick and efficient volume flow, turbulence, and IAQ analysis.
• Internal memory stores up to 7,500 measurement protocols, exportable as CSV via USB.
• Intelligent calibration concept: only probes need calibration, allowing continuous instrument use.
• Rear magnets for secure attachment to metal surfaces during measurement.

Applications

• Adjusting and balancing air conditioning and ventilation systems.
• Monitoring indoor air quality (IAQ) parameters like CO₂, CO, temperature, and humidity.
• Performing comfort level measurements, including turbulence assessment per EN ISO 7730 / ASHRAE 55.
• Conducting filter and fan measurements using the integrated differential pressure sensor.
• Laminar flow measurements in cleanrooms with low startup speed vane probes.
• High-precision air velocity measurements in fume hoods.

For extensive ductwork or hard-to-reach outlets, leverage the extendable telescope and 90° angle accessories with your vane probes. This setup allows you to accurately measure volume flow without needing a ladder, saving time and improving safety on site.

Technical Specifications

Pair With

Pair with compatible Testo probes, Pitot tubes, and measurement funnels.

Get Yours Today

Elevate your HVAC and IAQ measurement capabilities with the Testo 440 dP. Contact HVAC Shop today to discuss your specific needs and integrate this versatile instrument into your toolkit.