Testo 435


The Testo 435 is a multi-function instrument for air flow, indoor air quality, commissioning and energy management. There is one display unit and several different probe options for different functions, including duct, pressure differential and supply outlet measurements. For information on the complete list of Testo 435 options, e-mail or call HSE. Click here to download a brochure with product specifications.


Duct Measurements

Flow velocity probes for duct measurements are rugged and telescopic, making them very convenient for use even in large air ducts. If desired, airflow, air temperature and air humidity can be simultaneously measured with the handy three-function probe. Depending on your application, you can choose between a thermal probe, a vane probe or a Pitot tube for flow velocity measurement.


Pressure Differential Measurements

Does a fan filter unit need to be adjusted or replaced? Are pressure conditions between adjacent rooms properly adjusted according to specs? Simply connect the silicon hoses to the 435‘s corresponding connections, and immediately view the differential pressure between 0 to 10 in. w.c (0 and 25 hPa).

Supply Outlet Measurements

Simply insert the 4”ø (100 mm) vane probe into the funnel, and the 435 easily and automatically displays the volume flow of the supply outlet. The funnel factor is already programmed into the instrument. Now you can easily and quickly set the air delivery over several outlets.


Which 435 is right?

The Testo 435 comes in four model numbers, with probes, cases and other accessories offered at an additional cost.

  1. •435-1: Basic multi-function meter (no logging memory or differential pressure). $565.

  2. •432-2: Multi-function meter with differential pressure (no logging memory or software). $895.

  3. •435-3: Multi-function meter with logging memory and software (no differential pressure). $724.

  4. •435-4: Multi-function meter with differential pressure and logging memory and software. $1,069.


Recommended package — $2,425

HSE recommends the Testo 435 System Performance Test Kit with pressure measurement options. Included are:

  1. •1 Testo 435-4 unit.

  2. •PC software and USB cable.

  3. •1 Mini-vane anemometer probe.

  4. •Deluxe service case for Compact Pro.

  5. •2 RH probe heads (high performance).

  6. •2 wireless handle TC/RH with t/c adapter.

  7. •1 American wireless module.


Call or click here to order via e-mail.

HSE is the exclusive North American distributor for products manufactured by TEL, Temperature Electronics Ltd. TEL makes air flow monitors for fume hoods and bio-safety cabinets, VAV fume hood control products (including room pressure controls and fresh air bleed controls) and room pressure monitors. Contact HSE at 847-680-9930.

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