This document describes the features and characteristics of the Extech Cup Thermo-Anemometer AN400, including measurement units, free rotation of the low-friction cup vane in response to air flow, and built-in thermistor for measuring air temperature.
The Extech AN400 is a cup thermo-anemometer designed to measure air velocity in five units (ft/min, m/sec, MPH, km/hr, knots) and air temperature in Centigrade or Fahrenheit. It features a low-friction cup vane for accurate airflow measurement and an internal thermistor for temperature sensing.
| Measurement Range (Air Velocity) | 144 — 68985 ft/min |
|---|---|
| Measurement Range (Temperature) | 32°F to 122°F (0°C to 50°C) |
| Accuracy (Air Velocity ft/min) | + (2% + 40 ft/min) |
| Accuracy (Temperature) | ±1.5°F (0.8°C) |
| Power Supply | 4x 1.5V AAA batteries |
| Operating Temperature | 32 °F to 122 °F (0 °C to 50 °C) |
| Weight | 0.4 Ibs. (181g) |
Press and Hold (>2 seconds) the REC/C/F key to toggle between Centigrade and Fahrenheit.
Momentarily press the Logger button while in Record mode to manually store a single reading into memory.
The typical battery life is approximately 150 hours with an average power consumption of 6.8mA DC.