[2 PCS] Wind Speed & Heat Stress WBGT Meter, Digital Handheld Anemometer, Wind Speed Gauges with Temperature Humidity for Outdoor Workers, Iron and Steel Foundries, Drone Flying, HOLDPEAK HP-881W

The main reason i got this was jsut to measure wind speed. but it also has humidity and temperature as well as web bulb temperature and gives you and indication of heat stress.wind speed seems to work well, though I have no way to test its accuracy.in / out - it took me a while to figure out what this really is .... in, is the air temperature, and out is the black bulb temperature. so in direct sunlight, the "out" or black bulb temperature will be a lot higher than the air temperature. so keep this in mind, basically the heat you feel in the sun as opposed to the shade.it takes some time for those temperatures to settle out, so don't expect an immediate temperature reading unless it has been in the environment for like 15-20 min.so as far as heat stress, one is the heat stress when you are outdoors in the sun, and the other is indoors in the shade.I do like the features that warn you about a high heat index, as well as the RH feature.oh, a minor note, the backlight changes color as the heat index rises, but, you can't see those colors in the bight outdoors. .. still you do not that it is needed as it also has a bar that underscores the warning level. .. but just a small note about that.

Heat-related illness become more and more frequently during summer. However, weather report usually provides the air temperature reading from the measurement in the shade. For outdoor work or excises, environment factors, such as humidity, wind, temperature, and radiant heat, and workload, clothing also need to be considered. This device provides the reading of the wet bulb globe temperature which can help to better understand and prevent the potential hazards in hot summer days.

Item does as advertised to give information as needed.

Alright so i bought this to use to keep an eye on "heat stress" conditions in a warehouse.I think it will do what i want it to... but i feel its not really as advertised.Main Reasons1. The "WBGT" I can see it in the lcd pannel but for the life of me cant get the device to switch to that mode only toggles between "IN" & "out"2. There is no backlight at all. very difficult to see some of the smaller text.I like that you can set the green caution zone to whatever you want...It definitely reads 2 different temperatures the "IN" and "OUT" temp is in the center top part of the screen and it changes depending if its set to "IN" or "OUT". Then it reads ambient in the bottom left. Note that you can only view ambient temp when you switch to windspeed.Other than that it feels a bit cheap, and there is a few buttons that i feel do nothing. Instructions are not terribly useful either.I am not going to return it as the wind speed and ambient temp is useful. If I can figure out what the "IN" and "OUT" are for that be cool I suspect its different math for WBGT" however its not clear and I cant get "WGBT" to spark up so who knows. For me this just might be for ambient temp and wind speed which I happen to have a use for.

Now I don't have a professional grade tester to compare the measurements. However, this appears to be rather accurate with humidity and temperature. The instructions are nice and straightforward, and you are provided a small Philips and batteries. The most important feature is the backlight, without it I couldn't read the screen at all.