[2 PCS] HoldPeak 866B Handheld Anemometer, Digital Wind Speed Gauge Meter, Air Flow Velocity Temperature CFM Measuring Device for HVAC Outdoor Sailing Shooting Golf

After both my wireless Acurite and LaCrosse anemometers failed, I decided to buy the HoldPeak 866B hand-held unit to calibrate a hard-wired anemometer I am building using an Arduino Mega connected to the mechanical parts of my defunct Acurite.The box containing the HoldPeak had one corner that was crushed. Fortunately, the unit itself, which was in a sealed plastic bag, was undamaged. The attached photos show all that was included - the unit, the zippered carrying case, the lanyard that screws into the tripod mounting hole, and the instruction sheet.Of course the unit would not power up right out of the box because the two included AAA batteries were wrapped in plastic. I used a jeweler's Phillips screwdriver to remove the two small screws holding the battery compartment cover. The cover itself required a knife blade to pry it out. Removed and unwrapped the batteries then reinstalled them. The unit now powered up.I found the included, bare-bones instructions somewhat ambiguous regarding the use of the MAX/MIN and AVG (average) buttons, I had assumed, based on the skimpy instructions, that after you completed a measurement, you could switch between MAX and MIN and see those two wind speeds displayed. Finally figured out that is not how they work. What the instructions don't say is to get the MAX wind speed, you first must press the MAX/MIN button so that MAX appears on the display. Then do your measurement. When you are finished, the display will show the maximum speed and hold it until you either turn the unit off, hit the MAX/MIN or AVG buttons, or take another measurement where the wind speed exceeds that shown on the display from the first measurement. I like this feature.You can take a reading without the MAX icon showing and, after you finish, hit the MAX button but the reading will not be the max speed that occurred but some lesser speed,Why the MIN (minimum) wind speed feature was included is beyond me. Because, let's face it, every measurement you make is going to have a zero minimum. And that is exactly what is shown (0.0) every time you begin a reading with the MIN icon showing on the display.Use of the AVG feature is also rather hokey. Before you do a measurement, you have to press the AVG button so that icon is displayed. Then make your measurement. The display will show the actual wind speed until you stop. Then the speed that is displayed will decrease to some value (probably the average) and hold there for about 5 seconds then begin to decrease down to zero. The only thing the instructions say about this is - "average reading in 15 seconds will be displayed".Despite the lack of detailed instructions on how to use the MAX/MIN and AVG features, I found the wind speed measurements to be quite accurate. I tested the unit several times at different speeds by holding it out of my car window with MAX showing on the display. As I drove, I kept an eye on my speedometer to note the maximum speed I attained. When I stopped and checked the reading, it was right on what my speedometer indicated. At least it was accurate up to a speed if 32 miles per hour, which is the fastest I have tested it so far. The instruction sheet indicates that the speed accuracy is +/- 5%, which appears to be true. The next time I hit the highway, I'll check it out at 65 mph.Also displayed at the bottom is the air temperature, which is switchable between °C and °F. The unit apparently has a wind chill feature that only works when the temperature of the unit goes below 0 degrees C (32 F). Again the instructions are vague on the subject. I had to go back to Amazon's listing of the unit to learn that, when the air temp is below 32F, the temperature reading changes from the actual air temp to the wind chill value. Being in Florida, I don't think I will ever have the opportunity to check it out. I'll leave that up to the poor devils up north.Another feature I like is the switchable backlight. Great for checking wind speeds at night.Finally, the bottom line is that the HoldPeak 866B does what I bought it for - to have an inexpensive hand-held anemometer that will measure wind speeds with some degree of accuracy.

Works great, sturdy build, versatile features... all you'll ever need if you sail, fly kites or drones, or need any other spot (or average) wind measurements of any kind. Lots of features, big device feels good in your hand.

Bought for my father and now he sends me daily reports of the wind speed.

The users manual that comes with it is wrong. The numbers in the photo do not correspond with the text below.The photo online is correct just a PDF book.Not a big deal but maybe they’ll correct it I doubt it. I bought mine in 2016 and the PDF file you can download is still wrong.

Bought this for fun, something generally inexpensive. I brought it up to a place which is normally VERY windy but on this day it was not as windy. Still fun to have and it’ll add to my day. Everything seems accurate but I’m also not an expert with these things to compare to another wind meter. Fulfills my purpose and I like the size 👍

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.AppearanceThe 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, weightUnit 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.PowerUnit 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.WindspeedThe 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.

As an anemometer, this seems pretty solid. The wind turbine is fairly well balanced, very light, and on smooth low friction bearings. It responds readily to very light winds. The barometer feature also seems quite accurate--I compared it with local FAA weather stations at airports, and found no complaints.However, the temperature sensor seems to be inside the case--that's my guess at least. It's very inaccurate, reading 6 to 10 F high. It also responds laughably slowly to changes. The combination of the two effects is why I think the sensor is not in free air.Of course, over-reading the temperature makes any relative humidity measurement meaningless, and since I wanted this in part for low -temp/dew point spread information as early warning of fog conditions for flying and sailing, this had to be returned.If you just want wind and baro, this would be great.

Es práctico aunque un poco grande no tan fácil de manipular. En el manual y la app no se indica cómo hacer el enlace con Bluetooth, pero se realiza solo con activar el enlace Bluetooth en el celular. No da opción de enlazar el dispositivo, pero apenas se enciende el anemómetro, se muestran los datos en el celular

Medición real y exacta, ligero y muy fácil de usar.Para quienes relaizamos trabajos al aire libre relacionados con espectáculos, es una herramienta imprescindible para tener monitorizada la velocidad y cambio de viento, ante, escenarios, altavoces y equipos sobre trópodes o susceptibles de ser "tirados" por un viento cambiante a pesar de sus anclajes.

Mi trabajo es relacionado con la climatización y ventilación y este aparato me resulta muy incómodo para poder regular el caudal de aire de las rejillas de impulsión con otra ventaja que además del caudal de aire me dice también la temperatura a la que sale encantado con el artículo y a muy buen precio pantalla con retroiluminación

Equipo ligero y de fácil uso con pantalla retroiluminada. Unidades de Velocidad configurables fácilmente con el botón UNIT y la temperatura con el botón F/C. Bolsa de transporte. Muñequera. Rosca para situar en trípode o similar. Usa dos pilas AAA. Yo lo uso principalmente para asegurarme que la velocidad del viento está dentro de los limites admisibles antes de volar con mi RPAS (dron)

LO LOGICO SERIA QUE PUDIERAS CON UNA MEDICION EL VIENTO MINIMO, MAXIMO, Y EL PROMEDIO. Y ESTE APARATO NO LO HACE, SOLO LO HACE DE UNO EN UNO Y TIENES QUE REALIZAR 3 MEDICIONES DIFERENTES