Extech AN100 CFM/CMM Mini Thermo-Anemometer

Works great for HVAC balancing, optimization and data gathering. Bearings are good and very low friction.

Easy setup and functionality. CFM readings have to be multiplied by area. It has 8 memory storage values for this if your checking multiple ac vents. Better to know duct size not just register area. Averaging is best as readings fluctuate a lot. My only complaint is the airflow direction sticker is on the inside of the blade housing. I just added one to the outside with a paint marker. Sensor cord could be a little longer and the sensor handle needs a device to attach to and extension pole. Temperature portion is reasonably accurate and very handy for checking a/c air balance in homes since only 1 tool is required. Plastic of meter and sensor feels thin and cheap but lightweight. Don't drop this thing. Storage case is barely adequate but I will be adding the tool to an instrument hard case once I decide how attach an extension handle. Overall a decent reference tool.

Worked on supply side and exhaust side to know how much you’re getting air. L” x W” = answer divided by 144 and that where you get area.

Nice unit to check performance of air handling and ventilation units.

Opened box to find that the plastic fan inside the probe would not spin. Two of the fan blades were bigger than the others and made contact with the supports inside the fan. The battery cover didn't sit flush once the included battery was installed. and the plastic popped up around the edges. All screws holding the plastic pieces together looked like they were stripping based on little shreds of white plastic when removed. No signs of any damage related to shipping. Box arrived in good condition. Overall, the unit felt like a cheap plastic toy compared to other handheld measuring devices in the same price range. Going to be sending this back and requesting a refund. Two stars because the screen turned on and the thermometer worked.

Excellent Product

The wind vein cord has a short in it. You have to wiggle the cord to get any readings from it. Once you wiggle the cord and set the unit down and DON'T move it, it seems to work fine. But as soon as you pick it up the cord looses signal.

Well a bought this item for ajusting my dust collector to each machine have got. I'm checking the cfm and the velocity. I know that a machine with a output of 4" need 400 to 500 cfm. My dust collector is 1200 cfm. It took me some time to understand the meter. After 2 days I call the extech support and we saw a mistake on the book of the machine for the calculation of cfm and know the meter works very good. So I did a lot of testing with different size of ducking to maximize the cfm of my dust collector and it help me to take the final decision. So know I am very happy. Thanks to the tech support.

The delivery was excellent, arrived the very next day. Well packaged and wrapped, The unit has a nice clear display and the back light really inhance's the display. The useful feature is having the vane on a cable, I have used other units with a integrated vane which can be problematic if the the grill or whatever you are measuring is above you which makes reading the display awkward. The average faclillity is another useful feature as I have had to take multiple readings write them down and work out the averages myself. This unit can do it for you but the results are only displayed for a short time, it would have been nice to have the ablity to hold the result on the screen. The build quality is not bad, a little plasticity but not bad. The back stand however is really flimsy and I can't see it holding upto continued use. I have a multimeter made by extech and the back stand is far more substantial even though it is plastic. The unit comes with a carry case with additional shoulder strap which is a nice touch. It is the basic nylon type of matirial which is not the best but certainly good enough. I haven't fully used the unit yet but first impressions are good. All in all not a bad unit for the price there are cheaper out there but I wanted a unit made by someone I have heard of, as I mentioned I have a multimeter and it has served me well and the company I work for is actually buying four of the multimeters.

Easy to use and works well. Great price.

Das Gerät tut was es soll, grosse Anzeige und die Bedienung wie Handhabung ist einfach.Sehr praktisch ist die mitgelieferte Tasche.

Works well. Gives good baseline numbers to figure things out.

Works Perfectly!