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Red handheld air velocity meter with 30mm vane and LCD display

TENMARS ELECTRONICS

TENMARS ELECTRONICS TM-404 Air Velocity Meter -20~60°C

SKU CH-MQM2-PG2ZY MPN TM-404

Measures air speed, temperature, humidity and absolute pressure with a 30 mm vane, 99-record memory and backlight

  • Labor warranty1 Year
  • Product typeTest Equipment
  • Color and finishRed
  • Number of items1 pack
  • Sold asBox
  • Parts warranty3 Years
  • Measures air velocity from 0.4 to 25 m/s with 2%+0.2 accuracy
  • Calculates air flow in CMM or CFM up to 9999 with 1 unit resolution
  • Records temperature from -20 to 60°C with 0.1°C resolution and 1°C accuracy
  • Measures humidity 20-80% RH at 0.1% resolution and 3.5% RH accuracy
  • Stores 99 readings with max/min/avg, data hold, backlight and memory recall

Purpose-built anemometer for HVAC professionals

The TM-404 measures air speed, temperature, humidity and absolute pressure in one handheld unit. Its 30 mm vane responds from 0.4 m/s, making it suitable for low-flow outlet checks. On-board memory stores 99 records with recall for later review.

Velocity range 0.4–25 m/s with flow calculation

Air speed reads in m/s, km/h, mph, knots, ft/min and Beaufort with 2 % accuracy plus the stated offset. Flow is calculated in CMM or CFM up to 9999. Temperature covers -20 to 60 °C, humidity 20–80 %RH at 3.5 %RH accuracy, and 80 %RH at 5 %RH accuracy.

Stand-alone tester needing no external sensors

All sensors are integrated, so the meter works immediately at the register or duct. Backlit display aids reading in dim plant rooms. Data hold, max/min/avg and memory functions let technicians capture a full profile without a laptop or additional probes.

How it compares

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

Price $130.99
Pricier than about 62% of the 5,006 comparable items (median $95.99).

Specifications

Product
Brand nameTENMARS
Model nameTM-404
Product typeTest Equipment
Color and finishRed
In the box
Number of items1 pack

Questions about this item

Will the TM-404's 30 mm vane fit inside my existing duct openings for airflow checks?

The 30 mm vane is designed for spot measurements at air outlets, allowing direct insertion into standard duct openings for air speed, temperature, humidity and pressure readings.

How do I confirm the TM-404 is reading correctly after turning it on?

Check that the backlight activates, then verify live readings appear for air velocity, temperature, humidity and absolute pressure; use the data hold and memory recall functions to confirm the 99-record memory is storing values.

Does the box include everything needed to measure air flow in CMM or CFM, or must I buy extra accessories?

The TM-404 unit performs air flow calculation in CMM and CFM directly; no additional accessories are required for velocity, temperature, humidity or pressure measurements.

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