The Amprobe TMA-21HW Hot Wire anemometer technology eliminates the use of bearings and rotating parts. Because of this fact the meter is durable and provides good and stable accuracy of the measurements. It is used for indoor air quality and HVAC/R technicians measuring heating, ventilation, air-conditioning, refrigeration, wind flow and temperature in residential, commercial and industrial air conditioning systems.
| Feature | TMA-20HW | TMA-21HW | Best Accuracy |
| Air flow | 0.10 m/s → 30.00 m/s 0.2 km/hr → 110.0 km/hr 10 ft/min → 6000 ft/min 0.10 knots → 59.0 knots 0.12 MPH → 68.00 MPH |
+/- 3 % of rdg +/-1 %FS | |
| Air flow volume | 0.000 CFM → 999900 CFM 0.000 CFM → 999900 CMM |
+/- 3 % | |
| Temperature | – | – 4 °F → 140 °F (-20 °C → 60 °C) |
+/- 0.9 °F (+/- 0.5 °C,) |
| Relative humidity | – | 0.0 → 100 % | +/- 3 % |
| Data logging and USB interface | – | • | – |
| Wet bulb/dew point | – | • | – |
| Specifications | |
| Display: | Triple display, 4 digit LCD reading. |
| Sampling rate: | Once per second |
| Response time: | < 2 seconds |
| Manual memory capacity: | 5 X 99 sets. (direct reading from LCD display) |
| Power source: | 6 X AAA Battery |
| Probe dimensions/weight: | Wire length : 2.2 meter (7.2 ft) Probe length : 1.2 meter (3.9 ft) Probe diameter of tip : 15.0 mm (0.59 in.) Probe diameter of base : 28.0 mm (1.1 in.) Probe weight : 165 g (0.36 lbs) |
Hot Wire Anemometers
No ball bearings and rotating parts results in a more durable anemometer.
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| Product Manual » |
Savery –
Does everything quickly and accurately!
This unit is very accurate and quick. Great product for the price and appears very well made. Highly recommend this to all.
✔ Yes, I recommend this product.
smolaman –
This tool is a must have!!!
The Amprobe hotwire is an excellent and reliable device thats quick acting and hassle free. Excellent for todays demanding jobs!
✔ Yes, I recommend this product.
Athy –
One year use only -after that is just waste.
This product is very good when is new, has a lot of fixtures, BUT after one year when the time is coming to calibrated is nightmare. Two different company send me notification that is not able to calibrated. Last year I bought a new one because of the was not possible the calibration.
✘ No, I do not recommend this product