TENMARS ELECTRONICS TM-401 Multi-function Anemometer Temperature Humidity electrician tool

Measurement capabilities

The TM-401 is a portable multi-function anemometer that measures air velocity, temperature, humidity and absolute pressure. It uses a 30mm six-blade vane to detect air speeds from 0.4 metres per second up to 25 metres per second. The instrument also calculates air flow in CMM or CFM and stores up to 99 records for later recall.

Intended users and limitations

This tool suits HVAC technicians and electricians who need spot measurements at air outlets and want combined humidity and pressure data in one device. Buyers who require data logging beyond 99 records or need higher humidity accuracy above 80 percent relative humidity should consider other instruments.

Deciding specification

The model includes humidity and absolute pressure sensors alongside velocity and temperature measurement, which distinguishes it from the base TM-402 variant that lacks those functions.