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| Brand | testo |
|---|---|
| Model | testo 816-1 |
| Compliance | IEC 61672-1 Class 2, ANSI S1.4 Type 2, JJG 188, GB/T 3785.2–2010 |
| Measurement Range | 30–130 dB |
| Frequency Range | 20 Hz–8 kHz |
| Accuracy | ±1.4 dB (at 94 dB, 1 kHz) |
| Resolution | 0.1 dB |
| Time Weighting | FAST (125 ms), SLOW (1 s) |
| Frequency Weighting | A, C |
| Dynamic Range | 100 dB |
| Microphone | 0.5-inch electret condenser |
| Display | Backlit HD LCD with bar graph, time stamp, and data logging indicators |
| Data Storage | 99 manual entries, 31,000 continuous records, up to 99,999 via PC software |
| Power | 4 × AA batteries |
| Operating Temperature | 0–+40 °C |
| Storage Temperature | −10–+60 °C |
| Dimensions | 272 × 83 × 42 mm |
| Weight | 390 g |
| Brand | testo |
|---|---|
| Model | testo 405i |
| Type | Hot-wire anemometer |
| Measurement Principle | Constant-temperature anemometry (CTA) |
| Air Velocity Range | 0–30 m/s |
| Temperature Range (NTC) | −20 to +60 °C |
| Accuracy (Velocity) | ±(0.1 m/s + 5% of reading) @ 0–2 m/s |
| Resolution (Velocity) | 0.01 m/s |
| Resolution (Temperature) | 0.1 °C |
| Operating Temperature | −20 to +50 °C |
| Storage Temperature | −20 to +60 °C |
| Weight | 119.6 g |
| Dimensions (L×W×H) | 200 × 30 × 41 mm |
| Probe Sleeve Length | 400 mm |
| Probe Head Diameter | 9 mm |
| Probe Shaft Diameter | 12 mm |
| Battery | 3 × AAA, 15 h typical runtime |
| Bluetooth | Bluetooth 4.2 |
| Mobile OS | iOS 13.0+, Android 8.0+ |
| Enclosure Material | High-strength engineering plastic |
| Color | Black/orange |
| Brand | testo |
|---|---|
| Model | 416 |
| Type | Vane Anemometer |
| Measurement Range | 0.6–40 m/s |
| Resolution | 0.1 m/s |
| Accuracy | ±(0.2 m/s + 1.5 % of reading) |
| Operating Temperature | −20 to +50 °C |
| Storage Temperature | −40 to +70 °C |
| Weight | 325 g |
| Dimensions (L×W×H) | 182 × 64 × 40 mm |
| Probe Diameter | 16 mm |
| Telescopic Handle Max Length | 890 mm |
| Power Supply | 9 V battery |
| Battery Life | up to 80 h |
| Housing Material | ABS |
| Display | Backlit LCD |
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