As an Amazon Associate, Akermin earns from qualifying purchases. Product links on this page are affiliate links.
TOPTES · TopTes TS-301 Digital Anemometer, Wind Speed Meter with 2.26-inch Big Backlight LCD Screen, Air Flow Meter for Sailing Surfing Drone Flying RC Plane Golf Shooting HVAC
View on AmazonPrice and availability are shown on Amazon and can change at any time.
Verdict
The TopTes TS-301 is a vane anemometer that adds a humidity and temperature sensor and a notably large display. The listing states six measuring units, a 2.26 inch backlit LCD, relative humidity from 0.0 to 99.9 percent, temperature from -4.0 to 140.0 F, and the honest caution that the temperature and humidity sensors may need at least 30 minutes to acclimatise. It is a good general purpose instrument for HVAC and outdoor use, with the caveat that its wind speed specification is not published in the listing.
Documented Specifications
| Item | Manufacturer listing |
|---|---|
| Speed units | ft/m, ft/s, mph, knots, km/h, m/s, plus a times ten mode |
| Wind speed range and accuracy | Not stated in the bullets |
| Humidity | 0.0 to 99.9 percent RH |
| Temperature | -4.0 to 140.0 F |
| Display | 2.26 inch backlit LCD |
| Note | Temperature and humidity sensors may need 30 minutes to adjust |
Why Humidity Belongs on This Instrument
Airflow questions and moisture questions arrive together far more often than the tool categories suggest. Ventilating a crawl space helps only if the air you bring in is drier than the air already there, and in summer it frequently is not, which is how a well intentioned vent makes a damp floor worse. Balancing supply air in a building means knowing both how much is moving and what it is carrying. Checking a grow space, a workshop or a store room involves both numbers at once.
Having them on one screen means the second measurement actually gets taken. A separate hygrometer in the van is a hygrometer that stays in the van.
The Thirty Minute Warning Is Worth Reading
Very few listings admit this and it applies to every humidity sensor ever made. The sensing element has to reach equilibrium with the air around it, and that takes time, especially when the instrument itself is at a different temperature. Bring a meter from a warm van into a cold crawl space and it will read high, sometimes dramatically, until it warms through.
The practical method is simple: put the instrument down in the space, do something else for half an hour, then read it. Anyone who takes an instant humidity reading and acts on it is acting on the temperature of their own tool.
A Big Screen Is a Real Feature on Site
Airflow readings are taken in awkward places: above your head at a diffuser, at floor level in a return, inside a plant room with poor lighting. A 2.26 inch backlit display is readable in all three at arm’s length. This is one of those specifications that means nothing in a comparison table and a great deal on a ladder.
The Missing Speed Specification
The listing publishes ranges for humidity and temperature and not for wind speed, which is the instrument’s primary function. That gap matters because the low end of an anemometer’s range determines whether it can measure indoor airflow at all. Check the datasheet or ask the seller for the starting speed before buying if HVAC work is the main use, and see the BTMETER BT-100 for a competitor that publishes 0.67 mph.
Strengths
- Humidity and temperature alongside air speed.
- Large backlit display, readable in awkward positions.
- Six units including ft/min for CFM calculation.
- Honest acclimatisation note in the listing.
Limitations
- No wind speed range or accuracy published in the bullets.
- Thirty minute settling time before humidity readings are trustworthy.
- Vane size prevents use in small ducts or test ports.
- No logging or export stated.
How It Compares
The BTMETER BT-100 publishes speed range and accuracy and adds a tripod thread, but has no humidity sensor. The Testo 405i reaches inside ducts with a telescopic hot wire probe. The head to head is at BT-100 versus TS-301, and the ranking is in the anemometer roundup.
How We Research
All figures come from the manufacturer listing. We did not run laboratory tests and publish no measurements of our own. Where the listing publishes no figure, this review records the gap.
Recommended Tools
Products shown because their documented specifications fit this guide. Price and availability are on Amazon and can change.
Frequently Asked Questions
What units does it measure in?
Six: feet per minute, feet per second, miles per hour, knots, kilometres per hour and metres per second, with a times ten mode for higher values.
Does it state a wind speed range?
The bullets do not publish a speed range or accuracy figure. They do publish humidity from 0 to 99.9 percent and temperature from -4.0 to 140.0 F. Check the datasheet if the speed specification matters to your work.
Why does it need 30 minutes to settle?
The listing states the temperature and humidity sensors may take at least 30 minutes to adjust to a new environment. Humidity sensors equilibrate slowly, especially moving from a warm vehicle into a cold crawl space, and a reading taken immediately will be wrong.
Is the screen really an advantage?
On site, yes. A 2.26 inch backlit screen is readable at arm length above your head at a ceiling diffuser, which is where a lot of airflow readings are taken.
Affiliate disclosure: Akermin earns a commission from qualifying Amazon purchases made through links on this page. Our editorial picks are based on documented specifications and owner feedback, not commissions.
Related Guides
TopTes TS-501B Review: A 30 to 130 dB Meter With A and C Weighting
A handheld sound level meter stating 30 to 130 dB with 1.5 dB accuracy, a 30 to 8000 Hz frequency response, A and C weighting, a condenser microphone, max and min and data hold.
Read More→
BTMETER BT-100 Review: A Vane Anemometer That Publishes Its Starting Speed
A handheld vane anemometer stating 0.67 to 67.1 mph at 2 percent of reading, 0.1 m per second resolution, eight vanes, two temperature sensors, five units, wind chill and a tripod thread.
Read More→
TempPro TP50 Review: A Room Hygrometer That Publishes Its Accuracy
A digital thermometer and hygrometer stating 2 to 3 percent relative humidity accuracy, 1 F temperature accuracy, a 10 second refresh, high and low records and a dry, comfort or wet indicator.
Read More→