Testo Air Flow Matrix Kit with Testo 420 Multi-function Flow Instrument

Air flow grid – for supply air diffusers

Use the air flow grid to carry out accurate measurements on laminar flow supply air outlets. Use in conjunction with a differential pressure measuring instrument (e.g. testo 420, testo 480 or testo 435-4) to calculate flow velocity and volume flow.

The air flow grid (360 x 360 mm) can be used over a large area and is particularly suitable for carrying out measurements on HEPA filters and safety cabinets in cleanrooms.

Particularly useful: you can also use the screw-on telescope (can be extended to 1800 mm) to carry out volume flow measurements on high ceiling diffusers.

• Volume flow measurement on large supply air diffusers, HEPA filters and safety cabinets in cleanrooms
• The telescope makes it possible to carry out measurements on high ceiling diffusers
• Ideal for large surface areas
• Air flow grid dimensions: 360 x 360 mm

Testo 420 – Differential pressure measuring instrument

The CEC compliant testo 420 differential pressure measuring instrument is suitable for accurate differential pressure measurement up to 120 Pa, suitable for checking filters in HVAC systems. The testo 420 calculates flow velocity and volume flow. This instrument can also be used for absolute pressure measurement.

Differential Pressure Measuring Instrument with Practical Functions

You can use a pitot tube and compatible connection hoses (both optional) to measure the flow velocity and volume flow in ventilation ducts. Timed and multi-point mean calculation, as well as the combination of the two, together with simple input of the duct geometry, provide you with accurate flow measurements in ducts.

Automatic zeroing ensures higher accuracy for low pressures. All measuring values are easy to read on the large backlit display.

Documenting the Measurement Data

Measurement data can be stored in the testo 420 for analysis and documentation. It’s easy to manage the measurement data on a PC without any additional software, via the testo 420’s plug and play capability.