Testo Inc.
40 White Lake Road
Sparta, NJ 07871

Phone: (800) 227-0729
Email: Info@testo.com
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testo 435-4

testo 435-4, multi-functional meas. instr. with built-in differential pressure measurement for A/C, ventilation and Indoor Air Quality with readings memory, PC software and USB data transmission cable, with battery and calibration protocol

The ambient air conditions measuring instrument, for asssessing Indoor Air Quality and tuning and testing VAC systems, stands out on account of its efficient measurement process. The user-friendly measuring instrument has the right measurement engineering for every application and different flow speeds; for example, thermal probes, vane or Pitot tube measurement. Probe-controlled menus and selectable user profiles, e.g. for duct measurement or long-term measurement, ensure the user-friendliest operation possible. The new IAQ probe measures Indoor Air Quality by measuring the CO2 level, air moisture and air temperature. In addition, lux and comfort level probes can be connected to measure draught air. Clear analysis and archiving ensure convenient documentation. Temperature and humidity measurement is built-in in the new thermal probe. The special flow protocol professionally documents duct measurements. It is also possible to connect additional temperature and humidity probes. Readings from up to 3 temperature or humidity probes can be displayed in the measuring instrument; data transmission is by radio, i.e. wireless.

  • Instrument memory for 10,000 readings
  • PC software for analysis, filing and documentation of measurement data
  • IAQ probe, lux probe and comfort level probe
  • Thermal probes, vane measurement and built-in differential pressure probe probe for Pitot tube measurement
  • Radio probe for temperature and humidity
  • Protection class IP54

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Not available for purchase online
Order number 0563 4354
Probes Accessories Kits Certificates Technical Data Brochures  
Description Picture Part no.    
Absolute pressure probe
Absolute pressure probe 29 psi
Meas. Range 0 to +802.89 inH2O
 
0638 1835  
Humidity probes
Humidity/temperature probe
Meas. range -4 to +158 °F
Meas. Range 0 to +100 %RH
 
0636 9735  
Radio probes incl. humidity probe head
Wireless module for attachable probe heads incl. adapter for attaching T/C probes (Type K)
Meas. Range -58 to +1832 °F
 
0554 0189  
Wireless handle for attachable plug-in probe heads, incl. T/C adapter, approved for USA & Canada
Meas. Range -58 to +1832 °F
 
0554 0191  
Humidity probe head, attaches to wireless handle
Meas. range -4 to +158 °F
Meas. Range 0 to +100 %RH
 
0636 9736  
Radio handles with probe head for surface measurement
Wireless module for attachable probe heads incl. adapter for attaching T/C probes (Type K)
Meas. Range -58 to +1832 °F
 
0554 0189  
Wireless handle for attachable plug-in probe heads, incl. T/C adapter, approved for USA & Canada
Meas. Range -58 to +1832 °F
 
0554 0191  
T/C probe head for surface measurement, attachable to wireless handle, T/C Type K
Meas. Range -58 to +660 °F Short-term to +870 °F
 
0602 0394  
IAQ probes
Comfort level probe for degree of turbulence measurement with telescopic handle (max. 32 in.) and stand, meets DIN 1946 Part 2 requirements
Meas. range +32 to +122 °F
Meas. Range 0 to +984.25 fpm
 
0628 0109  
Lux probe, for measuring light intensity
Meas. Range 0 to 100.000 Lux 0 to 300 Hz
 
0635 0545  
Air probes
Efficient, robust NTC air probe
Meas. range -58 to +302 °F
 
0613 1712  
Multi-function probes
IAQ probe to assess Indoor Air Quality, CO2, humidity, temperature and absolute pressure measurement
Meas. range +32 to +122 °F
Meas. Range 0 to +10000 ppm CO2 Meas. Range 0 to +100 %RH
 
0632 1535  
Thermal velocity probe with built-in temperature and humidity measurement, Ø 0.5 in., with telescopic handle (max. 29 in.)
Meas. range -4 to +158 °F
Meas. Range 0 to +100 %RH
Meas. Range 0 to +3937 fpm
 
0635 1535  
Surface probes
Fast-action surface probe with spring thermocouple , for uneven surfaces, short-term range to +932°F, T/C Type K
Meas. Range -76 to +750 °F
 
0602 0393  
Pipe clamp probe for pipe diameter 0.2 to 2.5'', with replaceable measuring head. Measuring range to +536 °F short-term
Meas. Range -76 to +266 °F
 
0602 4592  
Clamp probe for measurements on pipes, pipe diameter 0.6 to 1'' (max. 1''), meas. range to +266 °F short-term
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Meas. Range -58 to +212 °F
 
0602 4692  
Prandtl's Pitot tubes
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(Longer versions on request)
 
0635 2045  
$product.Attributes.HEADLINE
(in connection with pressure probes)
 
0635 2145  
$product.Attributes.HEADLINE
(Longer versions on request)
 
0635 2345  
Velocity
Hot wire probe for m/s and °F, Ø probe head 0.3 in., with telescopic handle (max. 32 in.)
Meas. range -4 to +158 °F
Meas. Range 0 to +3937 fpm
 
0635 1025  
Vane meas. probe, 2.36 in. diameter, with telescopic handle max. 36 in., e.g. for meas. at duct exit
(can be used from 32 to 140°F)
Meas. Range +0.25 to +20 fpm
 
0635 9335  
4" Vane probe for measurements with funnel set 0563 4170
Meas. range 32 to +122 °F
Meas. Range +0.3 to +20 fpm
  		  0635 9435  
Vane meas. probe, .63 in. diameter, with telescopic handle max. 35 in., e.g. for meas. in ducts
(can be used from 0 to +140 °F)
Meas. Range +0.6 to +40 fpm
 
0635 9535  
immersion/ penetration probes
Waterproof immerstion/penetration probe, T/C Type K
Meas. Range -76 to +750 °F
 
0602 1293