Can you use it to measure air mass? Like kg / hour? And does it compensate for air temperature and air pressure?

It measures air velocity, period. Does not compensate for pressure or temperature. Does not measure air mass flow directly.

Can it calculate or convert to Feet per minute?

Here are the specs you are looking for: Measuring range: 0 to 6,000 fpm Accuracy: ±(20 fpm +5 % of m.v.) (0 to 394 fpm) / ±(59 fpm +5 % of m.v.) (394 to +3,000 fpm) Resolution: 1.97 fpm Volume flow: (cfm) 0 to 99,999 cfm (Resolution: 0.1 cfm)

Can you use it to measure the delta?

There's a trendline function that can keep track of changing temp over time.

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405i Hot-wire Anemometer I Wireless Smart Probe for air velocity, in-duct airflow and temperature

Product ID: 386510290

Details

Brand
Testo
Item dimensions L x W x H
20 x 3 x 4.1
Item weight
0.23 Kilograms
Material
Acrylonitrile
Style
Wireless Smart

📏Telescopic shaft extends to 15"

📶Bluetooth 4.0 wireless connectivity

🌡️Accurate temp range -20 to 60°C

196672CFA

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Sold byAmazon SenegalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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

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Description

🌬️ Elevate your airflow game—measure smarter, not harder!

REACH THE UNREACHABLE - Extendable 15" telescopic shaft lets you access tight ducts effortlessly—no more guesswork.
LIGHTWEIGHT POWERHOUSE - Compact and weighing just 4.22 oz, it’s the ultimate portable tool for on-the-go professionals.
PRECISION IN EVERY BREATH - Measures air velocity up to 30 m/s with ±0.5°C temperature accuracy for flawless HVAC diagnostics.
CUT THE CORD NOT THE DATA - Seamlessly syncs via Bluetooth 4.0 to your smartphone for real-time remote readings and control.
SMART INSIGHTS AT YOUR FINGERTIPS - Leverage the Smart Probe App to visualize data, generate custom reports, and eliminate manual errors.

The testo 405i is a wireless hot-wire anemometer designed for precise measurement of air velocity, temperature, and in-duct airflow. Featuring a rugged, extendable telescopic shaft and Bluetooth 4.0 connectivity, it pairs with the Smart Probe App to deliver remote readings, data visualization, and custom reporting. Lightweight and durable, it’s engineered for HVAC professionals seeking accuracy and convenience in challenging environments.

Specifications

ASIN	B018VO5GI2
Brand Name	Testo
Customer Reviews	4.5 4.5 out of 5 stars (617)
EU Spare Part Availability Duration	1 Years
Global Trade Identification Number	04029547014260
Included Components	testo 405i hot-wire anemometer, 3 AAA batteries and certificate of conformity
Item Dimensions	20 x 3 x 4.1 centimeters
Item Weight	0.23 Kilograms
Manufacturer	Testo
Material Type	Acrylonitrile Butadiene Styrene
Measurement Accuracy	±0.9 °F / ±0.5 °C
Model	405i
Number of Items	1
Part Number	0560 1405
Response Time	5 seconds
Specific Uses For Product	airflow measurement, air velocity measurement, temperature measurement, in-duct airflow measurement, HVAC system servicing, air conditioning system maintenance
Style Name	Wireless Smart Probe
Unit Count	1 Count

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196672CFA

Duties & taxes included

In stock

Sold byAmazon SenegalDelivered 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 Senegal.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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