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Red handheld anemometer with 30mm vane and LCD display

TENMARS ELECTRONICS

TENMARS ELECTRONICS TM-403 Anemometer electrician tool

SKU CH-NST0-60D90 MPN TM-403

Measures air speed up to 25 m/s, temperature, humidity and absolute pressure with a 30 mm vane and 99-record memory

  • Labor warranty1 Year
  • Product typeTest Equipment
  • Color and finishRed
  • Number of items1 pack
  • Sold asBox
  • Parts warranty3 Years
  • Measures air speed from 0.4 m/s with 30 mm vane
  • Records up to 99 readings for later recall
  • Calculates air flow in CMM and CFM units
  • Tracks temperature from -20 °C to 60 °C
  • Monitors humidity 20–80 %RH and absolute pressure

Air-speed and climate meter for technicians

The TM-403 anemometer measures air speed, temperature, humidity and absolute pressure in one handheld unit. A 30 mm six-blade vane responds to light air from 0.4 m/s, making it suitable for spot checks at air outlets. Memory stores up to 99 records with recall, and a backlit display aids reading in dim conditions. It is built for electricians and HVAC professionals who need combined airflow and climate data.

Thermals noise and power in normal use

The instrument draws power from standard batteries and operates without fans, so it adds no audible noise to the environment. Its operating temperature range spans -20 °C to 60 °C, allowing use in cold stores or warm plant rooms. Humidity measurement covers 20 %RH to 80 %RH with stated accuracy of 3.5 %RH in the main band. The pressure sensor provides absolute readings without external references.

Build integration and workflow fit

The meter fits in a tool bag and requires no external probes, freeing bench space and reducing setup time. Data hold, max/min/average functions and flow calculation in CMM or CFM let technicians log duct performance directly on site. Buyers who need wireless logging or PC software integration will not find those features here. The 99-record memory suits single-session surveys rather than long-term monitoring.

How it compares

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

Price $106.99
Pricier than about 54% of the 5,006 comparable items (median $95.99).

Specifications

Product
Brand nameTENMARS
Model nameTM-403
Product typeTest Equipment
Color and finishRed
In the box
Number of items1 pack

Questions about this item

How do I install the TM-403 anemometer for first use, and what step do people often miss?

Insert batteries, power on, then hold the unit so the 30 mm vane faces directly into the airflow; the step many miss is waiting for the reading to stabilise above the 0.4 m/s threshold before recording.

What maintenance or replacement will the TM-403 need later?

The vane and sensors have no user-serviceable parts; plan to replace the batteries when the backlight dims and send the unit for recalibration if humidity accuracy drifts beyond the stated 3.5 %RH or 5 %RH limits.

What limit shows up first during sustained use of the TM-403?

The 99-record memory fills first; once full, new measurements overwrite the oldest entries unless you offload the data.

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