The Testo 435-2 is perfect for monitoring, analyzing, and diagnosing indoor air quality, wherever you need to take important IAQ measurements. You can easily pinpoint and troubleshoot problems with HVAC systems, and immediately see the results of corrections. The 435-2 accepts a wide variety of probes to measure and record airflow, humidity, temperature, and indoor air quality (IAQ) readings. With the included ComSoft Software, this data can be organized by location, analyzed, and reported.
Specifications
Temperature - NTC
Measuring range
-58° to 302 °F / -50 to +150 °C
Accuracy
±0.4 °F (-13° to 166.8 °F) / ±0.2 °C (-25 to +74.9 °C)
±0.7 °F (-58° to -13.2 °F) / ±0.4 °C (-50 to -25.1 °C)
±0.7 °F (167° to 211.8 °F) / ±0.4 °C (+75 to +99.9 °C)
±0.5 % of mv (Remaining Range)
Resolution
0.1 °F / 0.1 °C
Temperature - Type K TC
Measuring range
-328° to 2498 °F / -200 to +1370 °C
Accuracy
±0.5 °F (-76° to 140.0 °F) / ±0.3 °C (-60 to +60 °C)
±(0.4 °F + 0.5 % of mv) (Remaining Range) / ±(0.2 °C + 0.5 % of mv) (Remaining Range)
Resolution
0.1 °F / 0.1 °C
Temperature - TC Type T (Cu-CuNi)
Measuring range
-328° to 752 °F / -200 to +400 °C
Accuracy
±0.5 °F (-76° to 140 °F) / ±0.3 °C (-60 to +60 °C)
±(0.4 °F + 0.5 % of mv) (Remaining Range) / ±(0.2 °C + 0.5 % of mv) (Remaining Range)
Resolution
0.1 °F / 0.1 °C
Humidity - Capacitive
Measuring range
0 to +100 %rH
Accuracy
See probe data
Absolute Pressure
Measuring range
0 to +800 InH₂O / 0 to +2000 hPa
Accuracy
See probe data
Resolution
0.1 InH₂O / 0.1 hPa
Velocity - Vane anemometer
Measuring range
0 to 11811 fpm / 0 to +60 m/s
Accuracy
See probe data
Resolution
0.01 fpm (60 + 100 mm Vane) / 0.01 m/s (60 + 100 mm Vane)
0.1 fpm (16 mm Vane) / 0.1 m/s (16 mm Vane)
Velocity - Hot wire anemometer
Measuring range
0 to +3937 fpm / 0 to +20 m/s
Accuracy
See probe data
Resolution
1.97 fpm / 0.01 m/s
Light
Measuring range
0° to 100000 Lux
Accuracy
See probe data
Resolution
1 Lux
0.1 Hz
General technical data
Dimensions
9 x 3 x 2 in. / 220 x 74 x 46 mm
Operating temperature
-4° to 122 °F / -20 to +50 °C
Housing
ABS / TPE / Metal
Protection class
IP54
Battery type
Alkaline, type AA
Battery life
200 h (typical vane measurement)
Display ligthing
Illuminated display
Storage temperature
-22 to +158 °F / -30 to +70 °C
Weight
15 oz. / 428 g
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