Product Overview - Vaisala HMT140 Quick Manual

Product Overview

The Vaisala Wi-Fi Data Logger HMT140 measures relative humidity and temperature using the
connected probe and analog signals – RTD, Voltage, Current Loops, and Boolean Contacts. It is
powered with 3 × 3.6 Volt batteries, outputs data via wireless transmitter, and comes with or
without an optional LCD display.
The HMT140 series of transmission devices supports several different signal measurements.
Available channel types are Relative Humidity (RH) and Temperature (T), RTD, Boolean
Contact, Voltage, and Current. The channel types are set at the factory during time of order.
Other wireless parameters can be changed afterwards using the configuration port and the
included software.
The HMT140 is available either with a fixed probe directly attached to the data logger housing
or a remote probe with different cable lengths (3/5/10 m (9.8/16.4/32.8 ft)).
The HMT140 is also available with an optional LCD display without backlight. It is typically
installed mounted on the wall with up to 4 screws (not included). Duct installation kits are
available as accessories. There is a drilling template inside the back cover of this guide to help
you position the screws correctly.
For more information on the HMT140 Data Logger, see the HMT140 User Guide (M211488EN),
available at www.vaisala.com/hmt140.
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