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 Handheld Digital Anemometer - Portable Wind Speed Meter CFM Meter Wind Gauge Air Volume Measure with LCD Backlight for Outdoors Sailing Surfing Fishing

Proster Handheld Digital Anemometer - Portable Wind Speed Meter CFM Meter Wind Gauge Air Volume Measure with LCD Backlight for Outdoors Sailing Surfing Fishing

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

📊CFM up to 99,990 for precise airflow

🔋9V battery included with auto power off

🌬️0.4-30 m/s wind speed range

MX$2031

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Description

🌬️ Master the breeze, wherever you go!

ENERGY SMART POWER - Includes 9V battery with low battery indicator and auto shutoff to maximize uptime during your adventures.
PRECISION WIND TRACKING - Measures wind speed from gentle breezes to strong gusts with 5 unit options for versatile outdoor use.
COMPACT PORTABLE DESIGN - Lightweight and handheld, perfect for on-the-go professionals who demand accuracy in sailing, surfing, or fishing.
ULTRA READABLE LCD DISPLAY - Backlit screen ensures clear data visibility even in low-light conditions—never miss a critical reading.
MULTI FUNCTION MEASUREMENT MODES - Hold, max, and min readings empower you to capture and analyze wind data effortlessly.

The Proster Handheld Digital Anemometer is a compact, battery-powered wind speed meter offering precise measurements from 0.4 to 30 m/s across multiple units. Featuring a large backlit LCD for easy reading, it supports advanced functions like hold, max, and min readings. Ideal for outdoor enthusiasts and professionals in sailing, surfing, and fishing, it combines portability with professional-grade accuracy.

Specifications

ASIN	B01FTPX566
Additional Features	Portable
Are batteries included?	Yes
Best Sellers Rank	#169,335 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #43 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
Item Dimensions D x W x H	1.49"D x 3.35"W x 6.49"H
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)
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	1.0 Count

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MX$2031

Duties & taxes included

In stock

Sold byAmazon MexicoDelivered 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 Mexico.

Secure transaction

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