Does it measure wind? Why do they stop at 69mph

Yes it does.my went up to 98mph in tn

Does this have a function to show average wind speed?

This model does not show average wind speed.

Anyone know how to calculate cfm’s in 4 inch round duct using this device?

You could make a 'funnel' to force all of the air flow through the anemometer blades, and just read the CFM's. Probably OK for a strong air source. Otherwise, measure the air flow in feet per minute and multiply by the area of the 4" duct in square feet. The formula is Area=pi x r squared. Sorry, I do not have a math typeface handy. Remember the area must be in square feet. Just to clarify, for a 4 inch duct, the area= 3.14 x (2/12) x (2/12) = 0.087 square feet. Multiply that by the air flow and you have CFM.

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Proster Digital Anemometer Handheld Wind Speed Meter CFM 5Units Backlight

Product ID: 32322430

Details

Brand
Proster
Color
Anemometer
Material
Plastic
Number of Batteries
1 9V batteries
Power Source
Battery
Product Dimensions
1.49"D x x

📊5 measurement units (m/s, ft/m, km/h, mph, knots)

🔋Auto power-off & low battery indicator

🌬️0.4-30 m/s wind speed range

E£ 673

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Description

🌬️ Measure the wind like a pro—don’t let precision pass you by!

CRYSTAL CLEAR READINGS - Large backlit LCD ensures you never miss a detail, even in low-light or nighttime conditions.
SMART POWER MANAGEMENT - Includes low battery alert and auto power-off to maximize battery life and keep you focused on the task.
VERSATILE UNIT OPTIONS - Switch seamlessly between 5 units—m/s, ft/m, km/h, mph, and knots—to suit your professional needs.
PORTABLE PROFESSIONAL - Compact, lightweight design with included 9V battery makes it the perfect tool for fieldwork or on-the-go measurements.
PRECISION IN EVERY BREEZE - Accurately measures wind speeds from a gentle 0.4 m/s up to a powerful 30 m/s for reliable data anytime.

The Proster Digital Anemometer is a handheld wind speed meter offering a wide measurement range (0.4-30 m/s) across 5 units, with a large backlit LCD for easy reading in any light. It features smart power-saving functions including auto power-off and low battery indicator, powered by an included 9V battery. Compact and portable, it’s designed for outdoor professionals needing accurate, versatile wind data.

Specifications

ASIN	B01FTPX566
Additional Features	Portable
Best Sellers Rank	#77,141 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #15 in Wind Speed Gauges
Brand Name	Proster
Color	Anemometer
Customer Reviews	4.4 4.4 out of 5 stars (803)
Display Type	LCD
Included Components	Battery
Is Used Where	Outdoor
Item Dimensions D x W x H	1.49"D x 3.35"W x 6.49"H
Item Highlight	Max/Min/Hold Backlit LCD Auto Power-off Wind Speed:0.4-30 m/s (5 units:m/s, ft/m, km/h, mph, knots) Air Volume: CFM/CMM/CMS
Item Type Name	WIND
Item Weight	11.3 ounces
Manufacturer	Proster Trading Limited
Material Type	Plastic
Model	WIND
Number of Batteries	1 9V batteries required. (included)
Number of Items	1
Part Number	PSTTL145US
Power Source	Battery Powered
Recommended Uses For Product	Outdoor
Sensor Technology	Mechanical
Shape	Oval
Specific Uses For Product	Wind Speed
Style Name	Compact
UPC	753807579186
Unit Count	1 Count

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E£ 673

Duties & taxes included

In stock

Sold byAmazon EGYPTDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to EGYPT.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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