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| Main -> Measuring systems -> Climate -> Flow |
| Velocity Measuring Instruments, Testo |
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
Probe type: | Measuring range | Accuracy | Resolution |
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 capacitive | 0 – +100%rF | ±2% rF (+2 bis +95% RH) | 0.1% RH |
Vane | 0 – +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 wire | 0 – +20 m/s | ±(0.03 m/s +5% of mv) | 0.01 m/s |
Absolute pressure probe | 0 - +2000 hPa | ±5 hPa | 0.1 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 |
Lux | 0 – +100000 Lux | acc. to DIN 5032 | 1 Lux |
Differential pressure sensor internal (435-4) | 0 – +25 hPa | ±0,02 hPa (0 – +2 hPa)
±1% of mv (remaining range) | 0.01 hPa |
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 |
| Article | Order No. | |
| (1) | testo 435-2 multi-function measuring instrument | 81 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 instrument | 81 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
| Article | Order No. | |
| Surface probe | 68 09 20393 | |
| Fast-action, with sprung thermocouple strip, also for uneven surfaces, measurement range short-term to +500°C, TC type K, fixed cable | |
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Measuring range: | -60 to +300°C |
Accuracy: | Class 22) |
t99: | 3 sec |
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| (3) | Fast, water-proof immersion/insertion probe, TE type K | 68 09 22693 | |
| Comfort sensor for measuring turbulence | 81 09 80109 | |
| with telescope (max. 820 mm) and stand, meets the requirements of DIN 1946 Part 2 | |
| (4) | IAQ sensor | 81 09 21535 | |
| for assessing room air quality, for measurement of CO2, humidity, temperature and absolute pressure | |
| (5) | Lux probe | 81 09 50545 | |
| probe for measuring light intensity | |
| (6) | Hot wire sensor | 81 09 51025 | |
| for m/s and C°, Ø probe head 7.5 mm, incl. telescope (max. 820 mm) | |
| Thermal flow sensor | 81 09 51535 | |
| with built-in temperature and humidity measurement, Ø 12 mm, with telescope (max. 745 mm) | |
| (7) | Vane measurement sensor, Ø 60 mm | 81 09 59335 | |
| with telescope max. 910 mm, e.g. for measurements in duct exit | |
| (8) | Vane measurement sensor, Ø 16 mm | 81 09 59535 | |
| with telescope max. 890 mm, e.g. for measuerments in ducts | |
| (9) | Humidity/temperature probe Ø 12 mm | 68 09 69735 | |
| Absolute pressure sensor 2000 hPa | 68 09 31835 | |
| in a robust metal case with jolt protection, incl. quick-action coupling (M8×0.5), magnet for fast fixing | |
Accessories for probes
| Article | Order No. | |
| testovent 410, volumetric flow measurement funnel | 81 09 40410 | |
| Ø 340 mm/330 × 330 mm, incl. carry-case | |
| testovent 415, volumetric flow measurement funnel | 81 09 40415 | |
| Ø 210 mm/190 × 190 mm, incl. carry-case | |
| Connecting tube, silicone, length 5 m | 81 09 40440 | |
| load capacity max. 700 kPa (mbar) | |
| Pitot tube, stainless steel, length 500 mm | 81 09 52045 | |
| For flow measurements, für testo 435-4 | |
| Pitot tube, stainless steel, length 350 mm | 81 09 52145 | |
| For flow measurements, für testo 435-4 | |
| Pitot tube, stainless steel, length 1000 mm | 81 09 52345 | |
| For flow measurements, für testo 435-4 | |
| Monitoring and humidity balancing set 11.3%RH/75.3%RH | 68 09 40660 | |
Radio
| Article | Order No. | |
| Radio module for measuring instrument, 869.85 MHz | 68 09 40188 | |
| Approval for the countries DE, NL, ES, IT, SE, AT, DK, FI, HU, CZ, PL, GR | |
| (10) | Radio handle for plug-on probe heads, incl. TE adapter | 68 09 40189 | |
| Approval for the countries DE, NL, ES, IT, SE, AT, DK, FI, HU, CZ, PL, GR | |
| TE probe head for surface measurement | 68 09 20394 | |
| attachable to radio handle | |
| TE probe head for air/immersion/insertion measurements | 68 09 20293 | |
| can be plugged on the radio handle | |
| (11) | Humidity probe head, can be plugged on radio handle | 68 09 69736 | |
Accessories
for test 735, testo 635, testo 435
| Article | Order No. | |
| Service case for measuring instrument, probe and accessories | 68 09 60135 | |
| Testo protocol printer | 68 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 plug | 81 09 40447 | |
| 100–250 VAC, 50–60 Hz | |
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