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The Testo 435-1 is an economic multifunction meter capable of monitoring, analyzing, and diagnosing indoor air quality. You can easily pinpoint and troubleshoot airflow problems with HVAC systems, and immediately see the results of corrections. The 435-1 accepts a wide variety of probes to measure and record airflow, temperature, and indoor air quality readings.
| 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 (-76.0° 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 |
| Temperature - TC Type T (Cu-CuNi) | |
|---|---|
Measuring range | -328° to 752 °F / -200 to +400 °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 |
| Humidity - Capacitive | |
|---|---|
Measuring range | 0 to +100 %rH |
Accuracy | See probe data |
Resolution | 0.1 %rH |
| Absolute Pressure | |
|---|---|
Measuring range | 0 to 800 InH₂O / 0 to 2000 hPa |
Accuracy | See probe data |
| 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 | 0.01 fpm / 0.01 m/s |
| Ambient CO2 (via IAQ probe) | |
|---|---|
Measuring range | 0 to +10000 ppm CO₂ |
Accuracy | See probe data |
Resolution | 1 ppm CO₂ |
| 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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- Flow measurement in the ventilation duct using a thermal anemometer and vane anemometer
- Measurement at the air outlet
- Measurement of the air and surface temperature
- Measurement of radiated heat
- Measurement of indoor air quality (CO2)
- CO measurement