HP-866B-WM Wind Speed Meter

Nice device, easy to use, high quality. Got mainly to use for HVAC use such as balancing the air flow from airconditioner and heater registers and checking temperature, dew point and humidity. Found that it also can be used to measure speed on a bicycle and walking pace if wind is not blowing!!! Living near sea level, have not had a chance to try it out on reading altitude.

With good tools, the only failure is operator error. Without reading the directions, I was able to figure this out in less than two minutes. That’s how easy it is to use. I do extreme long distance shooting and often shooter ranges between 700 and 1000 m, and with this I can use all the calculations to make my shot more accurate.

I am what you would call a shooting hobbyist and being from South Africa the budget is tight. I needed a simple solution for windage, elevation, temperature and humidity. I went for the cheaper product because I was simply aiming to do some maintenance in a long day at the range. I was expecting a cheapish product but I was pleasantly surprised by how good the quality is. Nice product guys. Will work just great for my porposes. Did some checks compared to a dude on the range with a 10x pricier unit and there is probably a maximum of 1% difference only on some readings. Flippin awesome product. Thanks guys

This review is for the HoldPeak HP-866B_WM. I would give it 5 star review except that it reports a bad windspeed value when in mph. If seller corrects this issue I will update this review. Except for this I am very pleased with my purchase. UPDATE: 10/8/2017. Manufacturer sent me second HP-866B_WM, and it has the same problem with windspeed in MPH. When I told them this, they said they would send the unit back to engineering to fix. In brief: PRO: Lots of good measurements. Light, well constructed, and easy to use. CON: (1) MPH reading is not correct. (2) Difficult to remove battery cover, requires screwdriver. (3) Unit forgets my last selections when powered off. WORK-AROUND: When I want MPH, I use the approximation that 1 meter/second is about 2 miles/hour, so I double the m/s airspeed reading. Appearance The unit I received looks exactly as pictured, with 6 buttons, blue rubberized bumper on left and right. Across the top: red power on/off, Wind, Baro. Across the bottom: Mode, T/RH, Alt. On backside is the battery cover and a rubber cover over an open rectangular hole. This is where the USB connector would be if this unit had a USB connector (it doesn't have one). Also the unit serial number (mine starts with 20170223 which looks like a datecode probably for the date of manufacture February 23, 2017. On the bottom is a metal screw spot where you can screw in either a tripod or the supplied hand strap. Size, weight Unit measures: width that varies from approximately 2.5" (6.3cm) where you hold it to approx. 3 3/8" (8.3cm) across the widest spot on top. Length is approx. 6 5/8" (16.7cm) top to bottom not counting the strap and its screw. Depth of unit is approx. 1.5" (3.7cm) at deepest spot (by the fan). Unit weighs approx. 5.56oz (157.5g) with batteries and strap attached. Power Unit requires 2 AAA batteries, and two come with the unit. Note that the battery cover is screwed in with two Phillips type screws and the cover is difficult to remove. This might be to provide some rain resistance. Windspeed The unit reports windspeed in meters/second (m/s), Kilometers/hour (Km/h), feet/minute (ft/min), knots, and miles per hour (mph). I know that my unit's windspeed is reported incorrectly in mph because: weather report says winds about 3 mph; outside, I see windspeed of 5 Km/h but when switch to mph I see 0.3 mph. Maybe it's a decimal point issue? I'm not sure, so I'm viewing windspeed in meters/second and multiplying by 2 to get a close approximation to miles/hour. Unit also reports: Barometric pressure in inches mercury in inHg and hpa mbar. Temperature (Centigrade and Fahrenheit), relative humidity, and dew point (Centigrade and Fahrenheit). Altitude in meters and feet. I'm not sure how accurate the altitude is so it might be best to use as a relative measure. The top display in large letters shows either Windspeed or Barometric pressure. The lower display in smaller letters can display temperature, relative humidity, dew point or altitude along with windspeed or barometric pressure. The Mode button only has an effect when you are displaying windspeed, and switches the mode from normal (instantaneous windspeed), Max, Min, and Avg (average). Holding down the Mode button for about 3 seconds turns on or off a very nice screen backlight. When you turn the unit on, it starts with windspeed in m/s and temperature in Centigrade regardless of what display you'd set it to earlier.

The temperature reads way too high on this thing, more than the advertised error, and enough to not be reasonably functional as a weather tool. It is also really inconvenient to carry around. On top of that, it is easy for the on button to get bumped in storage, and have all the battery life go down the drain. I recommend that you don't waste your money here. If you do decide to try it anyways, remember where you kept your box, so you don't lose your refund ability...

Pretty darn accurate. I'm the only one at the club with one, so it really helps. Know when to fly your whoops, race drones, foamies, and large scale stuff and what to expect. Granted I can only tell ground speeds, but at least we know what to expect when landing.

Easy to use, Handy when camping, hiking or any outdoor event. Works well and you can see it in the sun. Not hard to understand. I would recommend it . My husband has a more expensive one that doesn't have half of the features this one does. I plan to carry it with me when I am in the outdoors. It can be used night and day.

Only used it a couple times, but worked great. Easy to use. A lot larger then expected. Used once in a closed garage and the fan spun registering wind speed.

持ち運びやすい。

I bought this so I could test various configurations for a dust collection fit out in my small woodshop. Works brilliantly. Batteries last forever, the hold feature is great, and the LCD is nice and easy to see. Now I even use it to check how windy it is outside!

建築関係の仕事で、ちょっとした室内環境を把握するために購入しました。操作はわかりやすい（単位がついているから当たり前ですね）。温室度の速答性や精度については使用目的が大体の状況把握なので検証はしていませんが、今のところ支障はないです。ただ、本体のどの部分にセンサーがあるかが説明書にあると使用する時に便利かと思う。また、ある時付属のケースに入れて他の道具と一緒にトートバックに入れて持ち歩いていて、いざ使おうとしたら電源が入らない。もう故障かと思いましたが、電池を交換したら復活。単なる電池切れでした。恐らく、電源スイッチが押しボタン式のため、バックの中で押されたりしてオン状態が続いていたせいだと思います。これは利用時に気をつければ良いことです。

After a quick read thru booklet included I found the unit to be very easy to calibrate and use. I ran a test using my car and wind speed was within 1km/h so that's pretty good in my opinion. Will be a great tool for hunting.

No description of the country of origin- Made in China