There are 3 things I'd like input on, please.
- I just got done testing a Reed hotwire anemometer and, although this was 4+x more expensive than the previous two, it has fewer functions and there were several points on which I was not satisfied. That aside, I'm looking at 3 alternatives, having eliminated others with too small of a vane: Extech AN300, Extech AN310, and Cole-Parmer Digi-Sense 2025015 with NIST-traceable certification. The Extechs both have a 4" fan, while I can't find the fan size for the CP. None of the 3 provides data logging or real-time transfer, apparently. The CP seems to have a more user-friendly interface. The two Extechs are more sensitive: 0.2 to 30m/s for each, while the CP is .4 to 30 m/s. The AN300 and the CP two only do ambient temperature, while the AN310 also measures relative humidity, dew point and wet bulb. Another point about the CP that I'm concerned about is the long cable. If they've skimped on quality, then there may be a delay of a few seconds in both directions, like the Bonvoisin I tested. The Reed did well on increased speed but was delayed registering decreased speed, and seemed to hit a high and then drop (I'm wondering if that's typical of the hotwire).
So, I'm wondering how important it is to have the extra features of the AN310 when testing fans...?
- Which of the 3 would you suggest, or do you have a completely different one that is highly reliable and can measure as low as (or lower than) the Extechs?
- Additionally, I'm quite interested in the idea of having an air flow cone, but the one for the Extechs costs more than they do for something that could be 3D printed! I have access to a printer, so that is possible.