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

📏Measures CFM up to 99990

🔋Includes 9V battery with auto power off

🌬️0.4-30 m/s wind speed range

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Description

🌬️ Master the breeze, wherever you go!

NIGHT READY DISPLAY - Large LCD with backlight ensures clear readings anytime, even in low-light outdoor conditions.
PORTABLE PRO DESIGN - Compact, lightweight, and battery-powered for effortless use on sailing, surfing, fishing, or fieldwork.
SMART POWER MANAGEMENT - Includes 9V battery with low battery indicator and auto shutoff to keep you powered longer.
PRECISION WIND TRACKING - Capture wind speeds from gentle breezes to strong gusts with ultra-wide range (0.4-30 m/s).
VERSATILE AIRFLOW METRICS - Measure air volume in CFM, CMM, and CMS for comprehensive environmental insights.

The Proster Handheld Digital Anemometer is a compact, professional-grade wind speed meter offering precise measurements from 0.4 to 30 m/s. It features a versatile airflow measurement system (CFM, CMM, CMS), a large backlit LCD for easy reading in any light, and smart power management with included 9V battery and auto shutoff. Ideal for outdoor enthusiasts and professionals in sailing, surfing, fishing, and environmental monitoring.

Specifications

ASIN	B01FTPX566
Additional Features	Portable
Are batteries included?	Yes
Best Sellers Rank	#127,293 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #29 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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฿3967

Duties & taxes included

In stock

Sold byAmazon ThailandDelivered 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 Thailand.

Secure transaction

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