TENMARS ELECTRONICS TM-4001 Hot Wire Anemometer 0.01–40 m/s 99 records electrician tool

Electrician test tool for airflow measurement

The TM-4001 is a hot wire anemometer built for electricians and HVAC technicians who need to verify air velocity on site. It covers a range of 0.01 to 40 m/s and stores up to 99 records for later review. The telescoping probe reaches into ductwork while the large LCD shows speed in five selectable units. This meter suits commissioning, plant maintenance and system performance checks.

Quick setup with probe care needed

Power the unit with six AA batteries and extend the telescoping probe to begin measurements. The interface uses simple buttons for hold, max/min recall and manual memory storage of readings. The main installation risk is damaging the delicate hot wire sensor if the probe strikes duct edges or debris. Keep the probe clean and retract it fully when moving between locations to avoid bent shafts or broken wires.

Check power and data needs first

Confirm you have six 1.5 V LR6 cells available before the job; the meter ships without batteries installed. Verify that 99 stored records will cover your logging session, as the device does not expand memory or export data directly. The instrument measures velocity and volume only; it does not calculate dew point or wet bulb values. Ensure the 156 x 73 x 35 mm body and 250 g weight fit your tool bag and access points.