The testo 440 is a climate measuring instrument that can measure temperature, humidity, air pressure, and wind speed. It supports Bluetooth connectivity and can send data to a mobile phone.
This document serves as the instruction manual for the testo 440 climate measuring instrument. It provides essential information on safety, disposal, and authorizations before describing the instrument's physical features, display elements, and power supply options. The guide details how to commission the device, switch it on and off, and configure basic settings such as unit systems, date/time, and language.
| Operating temperature | -20 to +50 °C |
|---|---|
| Storage temperature | -20 to +50 °C |
| Bluetooth range (latest generation probes) | 20 m free field |
| Bluetooth range (Smart Probes) | 3 m free field |
| Battery type | 3 x AA batteries |
| Battery life | 12 hours |
| Weight | 250 g |
| Dimensions | 154 x 65 x 32 mm |
A flashing red LED indicates a low battery status.
A flashing yellow LED means the probe is switched on and searching for the Bluetooth connection.
A flashing green LED means the probe is switched on and connected with Bluetooth.
Hot wire measurement is not possible because the cap on the hot wire probe has not been opened before measurement.