Velocity Measuring Instruments, Testo / IDL

Velocity measuring instruments testo 435

Testo 435, is a measuring instrument for ambient air conditions, for assessment of indoor air quality and for adjusting and testing VAC systems.
It stands out on account of its efficient measurement process, incl. PC documentation. 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, the lux probe and comfort level probe can be connected to assess draught air. Clear analysis and archiving ensure practical PC documentation. Temperature and humidity measurement is integrated in the new thermal probe. The special flow protocol professionally documents duct measurements, also with option for including your company logo.
It is also possible to connect additional temperature and humidity probes, e.g. for exact measurement of surface temperature.
Readings from up to 3 temperature or humidity probes can be clearly displayed in the measuring instrument; data transmission is by radio, i.e. wireless

  • Instrument memory for 10.000 readings
  • ComSoft 3 software for analysis, archiving and documenting data
  • IAQ probe, lux probe and comfort level probe
  • Vane measurement and thermal probes
  • Radio probes for temperature and humidity
  • Protection class IP54

 

Technical Data:
Case:ABS/TPE/metal
Dimensions:220 × 74 × 46 mm (435-2)
225 × 74 × 46 mm (435-4)
Weight:450 g
Battery type:alkaline-manganese, mignon, type AA
Battery life:200 h (typical vane measurement)
Operating temperature:-20 to +50°C
Storage temperature:-30 to +70°C
Warranty:2 years


 

Probe type:Measuring rangeAccuracyResolution
NTC-50 – +150°C±0.2°C (-25 – +74.9°C)
±0.4°C (-50 – -25.1°C)
±0.4°C (+75 – +99.9°C)
±0.5 of mv (remaining range)
0.1°C
Type K (NiCr-Ni)-200 – +1370°C±0.3°C (-60 – +60°C)
±0.5 of mv (remaining range)
0.1°C
Humidity sensor capacitive0 – +100%rF±2% rF (+2 bis +95% RH)0.1% RH
Vane0 – +60 m/s±0.1 m/s +1.5% of mv (60-)
±0.2 m/s +1.5% of mv (16-)
0.01 m/s (60-)
0.1 m/s (16-)
Hot wire0 – +20 m/s±(0.03 m/s +5% of mv)0.01 m/s
Absolute pressure probe0 - +2000 hPa±5 hPa0.1 hPa
CO2 (IAQ probe)0 – +10000 ppm CO2±50 ppm CO2 ±2% of mv
(0 – +5000 ppm CO2)
±100 ppm CO2 ±3% of mv
(+5001 – +10000 ppm CO2)
1 ppm CO2
Lux0 – +100000 Luxacc. to DIN 50321 Lux
Differential pressure sensor internal (435-4)0 – +25 hPa±0,02 hPa (0 – +2 hPa)
±1% of mv (remaining range)
0.01 hPa


Article

Order No.
(1)testo 435-2 multi-function measuring instrument81 09 04352

for air conditioning, ventilation and room air quality with measured value memory, PC software and USB data transmission cable, incl. battery and calibration protocol

(2)testo 435-4 multi-function measuring instrument81 09 34354

with integrated differential pressure measurement for air conditioning, ventilation and room air quality. With measured value memory, PC software and USB data transmission cable, incl. battery and calibration protocol




Temperature probes
ArticleOrder No.
Surface probe68 09 20393
Fast-action, with sprung thermocouple strip, also for uneven surfaces, measurement range short-term to +500°C, TC type K, fixed cable
Measuring range:-60 to +300°C
Accuracy:Class 22)
t99:3 sec
(3)Water-proof immersion/insertion probe, TE type K68 09 21293
Comfort sensor for measuring turbulence10 09 40109
with telescope (max. 820 mm) and stand, meets the requirements of DIN 1946 Part 2
(4)IAQ sensor81 09 21535

for assessing room air quality, for measurement of CO2, humidity, temperature and absolute pressure

(5)Lux probe81 09 50545

probe for measuring light intensity

(6)Hot wire sensor81 09 51025

for m/s and C°, Ø probe head 7.5 mm, incl. telescope (max. 820 mm)

Thermal flow sensor81 09 51535

with built-in temperature and humidity measurement, Ø 12 mm, with telescope (max. 745 mm)

(7)Vane measurement sensor, Ø 60 mm81 09 59335

with telescope max. 910 mm, e.g. for measurements in duct exit

(8)Vane measurement sensor, Ø 16 mm81 09 59535

with telescope max. 890 mm, e.g. for measuerments in ducts

(9)Humidity/temperature probe Ø 12 mm68 09 69735
Absolute pressure sensor 2000 hPa68 09 31835

in a robust metal case with jolt protection, incl. quick-action coupling (M8×0.5), magnet for fast fixing




Accessories for probes
ArticleOrder No.
testovent 410, volumetric flow measurement funnel81 09 40410

Ø 340 mm/330 × 330 mm, incl. carry-case

testovent 415, volumetric flow measurement funnel81 09 40415

Ø 210 mm/190 × 190 mm, incl. carry-case

Connecting tube, silicone, length 5 m81 09 40440

load capacity max. 700 kPa (mbar)

Pitot tube, stainless steel, length 500 mm81 09 52045

For flow measurements, für testo 435-4

Pitot tube, stainless steel, length 350 mm81 09 52145

For flow measurements, für testo 435-4

Pitot tube, stainless steel, length 1000 mm81 09 52345

For flow measurements, für testo 435-4

Monitoring and humidity balancing set 11.3%RH/75.3%RH68 09 40660



Radio
ArticleOrder No.
Radio module for measuring instrument, 869.85 MHz68 09 40188

Approval for the countries DE, NL, ES, IT, SE, AT, DK, FI, HU, CZ, PL, GR

(AT)Radio handle for plug-on probe heads, incl. TE adapter68 09 40189

Approval for the countries DE, NL, ES, IT, SE, AT, DK, FI, HU, CZ, PL, GR

TE probe head for surface measurement68 09 20394

attachable to radio handle

TE probe head for air/immersion/insertion measurements68 09 20293

can be plugged on the radio handle

(AK)Humidity probe head, can be plugged on radio handle68 09 69736



Accessories

for test 735, testo 635, testo 435

ArticleOrder No.Price
Service case for measuring instrument, probe and accessories68 09 60135
Testo protocol printer68 09 40547

with wireless IRDA and infrared interface, 1 roll of thermal paper and 4 round cell batteries

Spare thermal paper for printer (6 rolls)68 09 40568

measurement data documentation with reading life of up to 10 years

Plug-in power supply unit 5 VDC 500 mA with Euro plug81 09 40447
100–250 VAC, 50–60 Hz


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