Testo 440 Air Velocity & IAQ Measuring Instrument
by Testo
Connects up to 3 probes simultaneously for airflow velocity, IAQ, CO2, and temperature in one platform with structured HVAC commissioning menus built-in.
Highlights
Capabilities
Media
www.testo.com
About This Product
The testo 440 is the reference instrument for commercial HVAC commissioning and TAB work in North America and Europe. The probe-swap system is the key differentiator — same handle works with hot-wire, vane, CO2, humidity probes. California Energy Commission Title 24 approved probes available.
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
Tool Specifications
- Accuracy Class
- Field Grade
- Measurement Range
- Depends on probe: 0–20 m/s velocity; CO2 0–10,000 ppm (optional); RH 0–100%
- Ruggedness
- Field
- Battery
- 3x AA
- Warranty
- 2 years
- Ecosystem
- Testo Smart Probes
- Companion App
- testo Smart App
Data Logging Mobile App
FSH Score Breakdown
Ease of Use 7.0
Features 8.0
Support 5.0
Value 4.0
Integrations 6.0
AI Capabilities 1.5
Features
104 features confirmed across
9categories· Showing confirmed capabilities only
Hardware Features36features
Automatic Probe DetectionAutomatic probe detectionMagnetic MountingMagnetic mountingMulti-Measurement ModesDrag pointer functionParallel Measurement of Humidity and TemperatureParallel display of 3 measuring valuesSensor LongevityAutomatic sensor protectionTouchscreen Display5-inch HD smart-touch displayIntegrated Draft and Gas ZeroingIntegrated Magnets for Mounting on Equipment CabinetRear magnets for secure attachment to metal surfaces
Show 28 more
Dual Backlit DisplayLarge clear display for measurement configuration and value displayIntegrated Magnets90° foldable probe with built-in magnets on Testo 605i for grille attachmentDifferential Temperature MeasurementTemperature measurementAdjustable Alarm Setpoints and LatchingAdjustable Probe LengthAuto ShutoffCustomizable Display and AlarmsDual Probe Support for Multi-Parameter MeasurementEarphone JackEarplug Connection for Loud EnvironmentsParallel Humidity and Temperature MeasurementRetrofit No Sensor CapabilityTiltable DisplayUSB Data TransferDetachable Probe Tips for Accessory Head CompatibilityLocking mechanism for secure probe connectionAngled Probe Connection45° angled hose connections on Testo 549iQuick-Change ProbesQuick-change probesRechargeable BatteryLong battery lifeDual Type K Temperature PortsCompatible with all Testo and standard Type K thermocouple probesSupports Combination of Two Probes Within a Single TransmitterConnects up to three probes simultaneouslyContact Temperature MeasurementNon-contact temperature measurementAutomatic Spot Tracking (Hot, Cold, Center)Internal data storage (7500 protocols)Automatic ZeroingAutomatic zeroingIntegrated Flow StraightenerIntegrated volume flow straightenerMulti-Unit MeasurementMulti-measuring point measurementIntegrated Differential Pressure SensorIntegrated differential pressure sensorMultiple Color Palettes and Image ModesParallel display of 3 measuring valuesField Replaceable CO Sensor
Compliance & Safety27features
Airflow CalculationsVolume flow calculation with duct geometry configurationStatic Pressure MeasurementFine pressure and 4 Pa measurementSuperheat/Subcool CalcAutomatic superheat and sub-cooling calculationsNIST Calibration TrackingNo calibration required for the meter unitTemperature Split CalculatorDeltaCool differential temperature measurementFlow Rate Calculatorvolume flow measurementGas Pressure MeasurementPressure measurementPsychrometric CalculationsTimed and multi-point mean calculation
Show 19 more
Refrigerant CalculationsAutomatic calculation of evaporation and condensation temperaturesTurbulence MeasurementTurbulence measurement (EN ISO 7730 / ASHRAE 55)VOC MeasurementVacuum measurementTurbulence And Draft Risk CalculationTurbulence and draught risk calculation (EN ISO 7730/ASHRAE 55)Refrigerant Compatibility CheckerA2L refrigerant compliantTimed and Multi-Point Mean CalculationIndoor Air Quality Calculation Including Dew Point And Wet Bulb TemperatureAutomatic calculation of dew point and wet bulb temperature via testo Smart AppFlue and Ambient Temperature MeasurementHumidity Mode with Mould Risk AssessmentA2L Refrigerant ComplianceAutomatic refrigerant database updatesAir BalancingPRO Air balancing measurement programmeLeak Detection TrackingAutomatic probe detectionCarbon Monoxide MeasurementH2-compensated CO sensorDetermination of Overheating, Pressure Drop Testing, and EvacuationDetermination of overheating, pressure drop testing, and evacuationAirflow MeasurementAirflow measurementLeak TestingHose-less pressure testingNitrogen Pressure Leak Test with Temperature CompensationTemperature-compensated leak testNOx Emissions TestingRetrofit NO sensor capabilityHeating/Cooling Output Calculation
Equipment & Asset Management13features
Remote MonitoringRemote control of instrumentsAir Quality Monitoringturbulence measurement (iso en 7730/ashrae 55)AlertsVisual and audible alarmLong-Term Environmental Measurementlong-term measurement loggingSelf-Diagnostic ModeSelf-test modeBluetooth Connectivity To Control BoardsBurst Logging CapabilityRefrigerant Database With Over 100 Entries
Show 5 more
Sensor DiagnosticsModular Sensor IntegrationConnects to three probes simultaneously (Bluetooth, wired, Type K)Sensor Replacement TrackingEasy sensor head replacementPresetsStored programs for measurementsRemote DiagnosticsMulti-parameter diagnostics
Mobile & Field Tools10features
Bluetooth Probe IntegrationDifferential pressure sensor support (testo 440 dP) for Pitot tube and filter measurementsBluetooth PrintingBluetooth printingCustomizable Data Collection by Building Type or ProgramCustomizable measurement parameter display in appDigital SignaturesOn-device signature captureDigital Documentation CreationDocumentation via Testo Smart AppGuided Measurement ProgramsMulti-Tool Simultaneous Connection
Show 2 more
Live Stream DataReal-time data streamingAI Photo AnalysisAutomatic probe detection
Reporting & Analytics8features
ReportingPDF and CSV report generationAnalyticsData visualization as diagrams or tablesEconomic AnalysisHeating/cooling output calculationPdf And Excel Report GenerationMeasurement data report export as PDF or Excel fileGraph and Table Data VisualizationAudit Report GenerationDigital documentation and PDF/CSV report generationMeasurement And VerificationStored measurement programsAutomated Data Logging
Platform & Customization6features
Data ImportAutomatic data synchronizationData ExportInternal memory storage for 7,500 measurement reportsDocument ManagementEasy documentationThird-Party IntegrationLive data feed integration with MeasureQuick AppCentralized Data StorageData Exchange with Testo DataControl PC Software
Technician Management2features
Electrical Measurement TrackingParallel measurementsAI LogbookData logging up to 7,500 protocols
Customer Communication1feature
Email IntegrationWiFi hotspot reporting
CRM & Sales1feature
Customer and Site Data ManagementCustomer and site data management
Pricing
- Model
- Quote Only
- Starting at
- Contact for pricing
- Notes
- Retail purchase. Base unit ~$400–500 USD; airflow kit with probes $700–1,100 USD.
