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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testo 405i Anemometer Handheld for Air Celocity, In-Duct Airflow and Temperature – CFM Meter with Extendable up to 15" Telescopic Shaft - Wind Meter with Bluetooth and App Operation

testo 405i Anemometer Handheld for Air Celocity, In-Duct Airflow and Temperature – CFM Meter with Extendable up to 15" Telescopic Shaft - Wind Meter with Bluetooth and App Operation

Product ID: 25479456

Details

Brand
Testo
Item Weight
0.23 Kilograms
Item dimensions L x W x H
7.87 x 1.18 x
Material
Metal Plastic
Style
Wireless Smart

📏15" telescopic shaft for hard-to-reach spots

📶Bluetooth 4.0 wireless connectivity

🌡️Accurate temp range -4° to 140°F

¥44691

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Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🌬️ Elevate your airflow game with testo 405i — precision meets portability!

DATA DRIVEN DECISIONS - Instantly generate, save, and share custom reports with graphical insights to impress clients and streamline workflows.
LIGHTWEIGHT POWERHOUSE - Compact and rugged design weighs just 4.2 oz, making it the ultimate portable tool for on-the-go professionals.
REACH WHERE OTHERS CANT - Extendable 15-inch telescopic shaft effortlessly accesses tight ducts and vents for comprehensive inspections.
PRECISION IN EVERY BREATH - Hot-wire sensor delivers ultra-accurate airflow and temperature readings, eliminating guesswork in HVAC diagnostics.
CUT THE CORD NOT THE ACCURACY - Seamless Bluetooth integration lets you monitor real-time data remotely via the intuitive Smart Probe app.

The testo 405i is a professional-grade handheld anemometer featuring a 15-inch extendable telescopic shaft, Bluetooth 4.0 connectivity, and a temperature range from -4° to 140°F. Designed for HVAC pros, it provides precise airflow, velocity, and temperature measurements, with smart app integration for remote monitoring and custom reporting. Lightweight and durable, it’s engineered for efficient, accurate inspections in even the tightest spaces.

Specifications

ASIN	B018VO5GI2
Best Sellers Rank	#21,515 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #2 in Anemometers
Brand Name	Testo
Customer Reviews	4.5 4.5 out of 5 stars (612)
Global Trade Identification Number	04029547014260
Included Components	testo 405i hot-wire anemometer, 3 AAA batteries and certificate of conformity
Item Dimensions	7.87 x 1.18 x 1.61 inches
Item Weight	0.23 Kilograms
Manufacturer	Testo
Material Type	Metal, Plastic
Measurement Accuracy	±0.9 °F / ±0.5 °C
Model	405i
Output Type	Digital
Part Number	0560 1405
Sensing Distance	15 Inches
Specific Uses For Product	HVAC inspections, air conditioning servicing, industrial and professional settings, confined spaces
Style Name	Wireless Smart Probe
Unit Count	1.0 Count

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¥44691

Duties & taxes included

In stock

Sold byAmazon JapanDelivered 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 Japan.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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