Testo 420 Flow Hood – Air Flow Meter for Airflow, air velocity, volume flow, temperature, and relative humidity – HVAC Air Flow Meter CFM with Tiltable Display, Bluetooth, and App Compatibility

Testo 420 Flow Hood – Air Flow Meter for Airflow, air velocity, volume flow, temperature, and relative humidity – HVAC Air Flow Meter CFM with Tiltable Display, Bluetooth, and App Compatibility

Q: Does this come calibrated? Would like to purchase, but need to know if it's calibrated first. Thank you!

Testo 420 basic kit comes with the factory calibration, but this is not a NIST. We do have them in stock at Value Testers, so you can purchase one from our store on Amazon. If you need NIST calibration, there is another version, but the lead time is about 2 weeks. The factory calibration is done in Germany, so it is almost like a NIST. Hope this answers your question.

Q: Would you like to know if the equipment has been calibrated with a valid date?

Validity of certification is shown only on NIST calibration certs. You need to order one that comes with NIST.

Q: will this hood read down to 15 cfm?

Measuring Range 50 to 2120 CFM, so won't. You need TSI Alnor 6200D, or 6200, as it measures low air flow 10 to 500 cfm. https://www.amazon.com/TSI-6200-Balometer-Capture-Height/dp/B00DDX87UQ/ref=sr_1_1?crid=1V2A1RD81VRDQ&keywords=tsi+alnor+6200&qid=1567609523&s=gateway&sprefix=tsi+alnor%2Caps%2C177&sr=8-1

Q: Someone already asked this but the lengthy answer given still did not answer it: what is the maximum cfm that this hood can measure?

Hello As per the manufacturer`s Technical data sheet: Measuring range 25 to 2,300 CFM (40 to 4000 m³/h) Best Regards, Kate Mal

4.3/5

Product ID: 52042481

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📊NIST-certified triple temperature calibration

📱Bluetooth + app remote control

⚖️6.4 lbs lightweight ergonomic design

Frequently Bought Together

Testo 420 Flow Hood – Air Flow Meter for Airflow, air velocity, volume flow, temperature, and relative humidity – HVAC Air Flow Meter CFM with Tiltable Display, Bluetooth, and App Compatibility

Testo 605i | Thermohygrometer for Indoor Temperature and Humidity Measurement | with Bluetooth Support

Description

📈 Elevate your HVAC game with precision and connectivity that keeps you ahead!

ERGONOMIC MASTERY - Weighs under 6.4 lbs with a tiltable display, designed for comfort during extended use and hard-to-reach spots.
CERTIFIED CONFIDENCE - Comes with NIST-certified calibration at three temperature points, ensuring compliance and reliability.
EFFORTLESS PRECISION - Unique volume flow straightener guarantees accurate airflow readings even in turbulent conditions.
SEAMLESS CONNECTIVITY - Bluetooth-enabled for real-time remote monitoring and instant report generation via the Testo 420 app.
VERSATILE MEASUREMENT - Detachable control unit doubles as a standalone device for pressure, flow, and volume with optional accessories.

The Testo 420 Flow Hood is a lightweight, ergonomic HVAC airflow meter featuring a unique volume flow straightener for precise measurements. Equipped with Bluetooth and app compatibility, it enables remote monitoring and instant reporting. Its detachable control unit offers versatile measurement options, and NIST-certified calibration ensures regulatory compliance, making it the ultimate tool for professional HVAC testing and balancing.

Have a Question? See What Others Asked

Does this come calibrated? Would like to purchase, but need to know if it's calibrated first. Thank you!

Would you like to know if the equipment has been calibrated with a valid date?

will this hood read down to 15 cfm?

Someone already asked this but the lengthy answer given still did not answer it: what is the maximum cfm that this hood can measure?

Reviews

4.3

All from verified purchases

T**D

Awesome Flow hood!

Great piece of equipment!

12.03.2025

N**K

NOT actually NIST Certified

I paid extra for this one with NIST certification. It says "Includes NIST Certificate" in the product description but only comes with a factory testing certificate and says "test were obtained using equipment capable of producing results that are traceable thru NIST." NOT a NIST certificate.

12.03.2020

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TrustScore 4.5 | 7,300+ reviews

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Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

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Testo 420 Flow Hood – Air Flow Meter for Airflow, air velocity, volume flow, temperature, and relative humidity – HVAC Air Flow Meter CFM with Tiltable Display, Bluetooth, and App Compatibility

Description

Have a Question? See What Others Asked

Reviews

Common Questions