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Red handheld air velocity meter with vane and display

TENMARS ELECTRONICS

TENMARS ELECTRONICS TM-411 Air Velocity Meter -20~50ºC electrician tool

SKU CH-KP4M-CRF7N MPN TM-411

Measures air speed, temperature and humidity with a 30 mm vane, 0.4 m/s sensitivity and 99-record memory

  • Labor warranty1 Year
  • Product typeTest Equipment
  • Color and finishRed
  • Number of items1 pack
  • Sold asBox
  • Parts warranty3 Years
  • Measures air velocity from 0.4 m/s with 3%+0.2 accuracy
  • Calculates air flow in CMM and CFM up to 9999
  • Reads temperature from -20 °C to 60 °C with 1 °C accuracy
  • Stores 99 records with recall and backlight for low-light use
  • Includes absolute pressure sensor for complete air-condition analysis

Air velocity and flow measurement

The TM-411 measures air speed from 0.4 to 45 m/s and calculates airflow in CMM or CFM up to 9999. It records maximum, minimum and average readings with a data hold function. A backlit display and auto power off with disable option support extended use in the field.

HVAC technicians and environmental testing

Suited for professionals who need spot measurements at air outlets using the 30 mm vane. The meter stores 99 records for later recall but does not measure humidity or absolute pressure. Buyers who require humidity or pressure data should consider other models in the series.

0.4 m/s minimum air speed sensitivity

The instrument starts reading at 0.4 m/s with a resolution of 0.1 m/s and an accuracy of 3% plus 0.2 m/s. This threshold determines whether low velocity flows can be captured reliably.

How it compares

Measured against everything we stock in Electrical Trade Tools & Kits, at today’s prices. Recalculated every night.

Price $103.99
Typical for this category: the median of 5,006 items is $95.99.

Specifications

Product
Brand nameTENMARS
Model nameTM-411
Product typeTest Equipment
Color and finishRed
In the box
Number of items1 pack

Questions about this item

What air-velocity units and ranges does the TM-411 cover?

The TM-411 reads m/s from 0.4 to 45, km/h from 1.5 to 160, mph from 0.9 to 100, knots from 0.8 to 88 and ft/min from 79 to 8800, all at 3% plus the stated offset.

What size is the vane and how does it mount for duct measurements?

The meter uses a 45 mm four-vane probe; the supplier notes a 30 mm vane for outlet spot checks, so the head fits standard HVAC grilles and ducts.

How do I start logging the 99-record memory and avoid losing data when the unit powers off?

Press the memory key to store each reading up to 99 records; disable auto power-off in the menu before long sessions, otherwise the meter shuts down and clears the session buffer.

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