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Testo 435-4 IAQ Kit
Testo 435-4 IAQ Kit
Testo 435-4 IAQ Kit
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Price: $2,330.00

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Availability: Subject to availability
Product Code: 400563-4355


Testo 435-4 IAQ Kit

The Testo 435 is the preferred instrument for today's professional air balancing contractors, commissioning experts and building energy management specialists. Configurable with an arsenal of probes you can easily pinpoint and troubleshoot problems with HVAC systems and see the results of corrections immediately. Quickly and easily verify system performance to provide real time BTU/hour readings.


  • Accepts a wide array of sensors / probes for: airflow, temperature, humidity, CO2 and CO measurement
  • Performs timed and multi-point averaging and CFM, BTUh, and cooling tons calculation
  • Internal precision pressure sensor available
  • Printing capabilities (measurement, with date and time)
  • Data logs up to 10,000 readings
  • Optional TopSafe protects from impact, dust and water
  • Protective transport case organizes instrument, probes and accessories
  • Takes readings from up to 3 wireless temperature / humidity probes
  • Integrated rubber boot and magnetic back

Probes and Applications

  • See all Testo 435 Probes
  • For basic HVAC checks, temperature and humidity measurements have been integrated in the new thermal probe, for measurements in ducts. Flow speed, volume flow, air humidity and air temperature can easily be measured in one sequence.
  • The vane probe with a diameter of 2.4 in. is suited for integrated measurements at registers. For duct measurements, a 0.6 in. vane probe with a broad range, 118 to 8000 fpm is available. The pitot tube is ideal for higher air velocities. A 10"H20 differential pressure probe is integrated into the Testo 435-3 and Testo 435-4 for this purpose.
  • For important IAQ measurements the unique IAQ probe measures CO2, relative humidity and room air temperature in order to evaluate room air quality plus absolute pressure.
  • The degree of air velocity or draftiness in any room can easily be determined with the turbulence probe. Determine the true illumination (lux) of those low-lit areas that affect working conditions daily.
  • Surface temperature measurements of motors, cooling coils, heat exchangers, etc. are easily performed with the cross-band probe. Its unique design reaches the actual surface temperature in just a few seconds.


  • 0563 4354 - Testo 435-4 Multifunction Meter
  • 0632 1535 - IAQ probe CO2, humidity, temperature
  • 0554 0610 - 4 x NiMH rechargeable batteries with charger
  • 0635 2045 - 19" pitot tube
  • 0554 0440 - Silicon hose for pressure probes (16' long)
  • 0516 0435 - Deluxe service case

Warranty Information

The Testo 435-4 Multifunction Meter has a 2-year warranty.

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