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Testo 420 Air Flow Capture Hood

by Testo

Last updated Mar 29, 2026 · 2 revisions

Lightweight balometer with patented flow straighteners for accurate readings at turbulent outlets, Bluetooth app streaming, and removable micromanometer.

Testo 420 Air Flow Capture Hood - by Testo - Balometers & Capture Hoods software - logo 6.0 Good See breakdown →

Highlights

Smart Tool48 Features

Capabilities

Custom Mobile App

Trust

MeasureQuick Compatible
Buy from Testo Visit website

Media

www.testo.com
Testo 420 Air Flow Capture Hood - website image

About This Product

The Testo 420 is a professional air flow capture hood weighing under 6.4 lbs, measuring flows from 80 to 3500 m3/h. Its patented flow straightener technology improves measurement accuracy at turbulent swirl outlets. The integrated measuring unit detaches for standalone pressure, flow, and velocity measurements via Pitot tube. Multiple hood sizes from 14x14 to 36x36 inches are available, and Bluetooth connectivity enables live measurement streaming through the testo 420 app.

Capabilities

How this product is delivered and what's included out of the box.

Mobile app
Available
Free trial
No
Free tier
No
Public API
No
Deployment
On Premise

Certifications & Approvals

Independent industry credentials this product holds.

MeasureQuick Compatible

Integrates with MeasureQuick, the diagnostic platform used by HVAC technicians for in-field system performance testing. Data captured in MeasureQuick flows into this product without manual re-entry.

FSH Score Breakdown

Ease of Use
6.5
Features
8.0
Support
5.0
Value
5.5
Integrations
5.0
AI Capabilities
1.5

Features

48 features confirmed across 7categories· Showing confirmed capabilities only

Compliance & Safety15features

Airflow CalculationsPitot tube measurementStatic Pressure MeasurementDifferential pressure measurementSuperheat/Subcool CalcAutomatic calculation of superheating/subcoolingAir Velocity and Flow MeasurementPatented flow straighteners for improved accuracy at turbulent outletsAuto CalibrationHood calibrationCEC ApprovedCEC approvedDetermination of Overheating, Pressure Drop Testing, and EvacuationMeasurement of high and low pressureFlow Rate CalculatorVolume flow measurement
Show 7 more
Indoor Air Quality Calculation Including Dew Point And Wet Bulb TemperatureCalculates dew point and wet bulb temperaturePsychrometric CalculationsTimed and multi-point mean calculationRefrigerant CalculationsAutomatic calculation of evaporation and condensation temperaturesTimed and Multi-Point Mean CalculationTimed and multi-point mean calculation for duct measurementsAir BalancingAir balancing measurement programRefrigerant Pressure And Temperature CorrelationsMeasures high-side or low-side refrigerant pressure simultaneously with 2 probesNIST Calibration TrackingIncludes NIST certificate of calibration

Hardware Features14features

Angled Probe Connection45° angled probe connectionAutomatic ZeroingAutomatic zeroing for higher accuracy at low pressuresErgonomic HandlesErgonomic handlesHoseless Measurement for Low Refrigerant LossLow refrigerant loss due to hoseless measurementParallel Humidity and Temperature MeasurementMeasures relative humidity and temperatureTiltable DisplayTiltable display for convenient viewingSmall-Diameter Probe for In-Duct MeasurementsSmall diameter probe for in-duct measurementsPositive and Negative Pressure MeasurementHose-less wireless pressure measurement
Show 6 more
Integrated Flow StraightenerIntegrated flow straightener for swirl outletsQuick-Change ProbesRechargeable BatteryRechargeable batterySensor LongevityAutomatic sensor protectionTouchscreen DisplayUSB Data Transfer

Reporting & Analytics7features

ReportingEmailing of measurement data reports as PDF or Excel documentsPdf And Excel Report GenerationReport generation as PDF or Excel filesProfessional Report Generation and Email CapabilityDirect report dispatch by e-mailGraph and Table Data VisualizationGraphical and tabular measurement data displayCreate and Send ReportsOn-site measurement report generation and email via appAutomated Data LoggingOn-board 2 GB data logging memoryAudit Report Generation

Equipment & Asset Management7features

Bluetooth Connectivity To Control BoardsBluetooth connectivity up to 30 metersFavorites List for RefrigerantsRemote Device and Sensor Monitoring1 Minute Data Interval Storage16,000 measured value storage capacityRemote MonitoringWireless remote monitoring and operation via Bluetooth and smartphone appRefrigerant Database With Over 100 EntriesOver 90 stored refrigerantsSelf-Diagnostic Mode

Platform & Customization3features

Data ExportIn-app email function for sending reportsThird-Party IntegrationLive data feed integration with MeasureQuick AppAudit TrailOn-board 2 GB data logging

Mobile & Field Tools1feature

Bluetooth Probe IntegrationWireless connection of optional Bluetooth probes for temperature, pressure, and humidity

Certifications & Standards1feature

MeasureQuick Compatible

Pricing

Model
Custom
Starting at
$3,419

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