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0563 0400 71

testo 400 air flow kit with hot wire probe

testo 400 air flow kit with hot wire probe
testo 400 air flow kit with hot wire probe
testo 400 air flow kit with hot wire probe
testo 400 air flow kit with hot wire probe
Ideal kit for IAQ professionals, with a focus on air flow measurement. You will receive the testo 400 universal IAQ measuring instrument with intuitive measurement menus, one hot wire probe head (including temperature and humidity sensor), one vane probe head (Ø 100 mm) and one high-precision humidity/temperature probe head – all three can be attached to the Bluetooth® handle supplied. For measurements at ceiling outlets, simply combine the 100 mm vane probe with the telescope (can be extended up to 1.0 m) and the 90° angle.
  • Complete airflow solution – Includes probes for hot wire, vane (Ø 100 mm), and high-precision humidity/temperature measurements
  • Standard-compliant measurements – Perform grid-based volume flow assessments per EN ISO 12599 & ASHRAE 111
  • Wireless and ergonomic – Bluetooth® handle with telescopic extension (up to 1.0 m) and 90° angle for ceiling outlet access
  • Advanced data management – Includes PC software for report generation, analysis, and customer site organisation
  • Expandable system – Compatible with a wide range of digital Bluetooth® and cable probes for future flexibility
The testo 400 Air Flow Kit with Hot Wire Probe is the ultimate measurement solution for HVAC and IAQ professionals who need reliable, high-accuracy airflow analysis across various environments. This advanced kit includes the testo 400 universal IAQ instrument, which is engineered to measure all essential IAQ parameters such as air velocity, temperature, humidity, pressure, CO₂, and CO.

With standard-compliant measurement menus built in, the testo 400 enables volume flow analysis in ducts according to EN ISO 12599 and ASHRAE 111, making it ideal for commissioning and balancing HVAC systems. The included hot wire probe (with integrated temperature and humidity sensors), Ø 100 mm vane probe, and high-precision humidity/temperature probe offer flexibility for both duct and room measurements.

Bluetooth® connectivity allows for wireless operation, while the included telescope and 90° angle adapter support ergonomic measurements at ceiling diffusers. The included professional software simplifies data analysis, reporting, and customer management.

Whether you're doing spot checks or detailed airflow studies, the testo 400 Air Flow Kit ensures fast, accurate, and fully documented results every time.

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testo 400 Universal IAQ instrument

: 0560 0400

testo 400 - Universal IAQ instrument

Comprehensive IAQ Measurement – Measures all IAQ parameters, including flow velocity, temperature, humidity, pressure, CO2, CO, and more.

Hot wire probe (digital) with Bluetooth® including temperature and humidity sensor

: 0635 1571

Hot wire probe (digital) - with Bluetooth® including temperature and humidity sensor

Four-in-One Measurement - Simultaneously captures air velocity, volume flow, air temperature, and humidity – essential for comprehensive HVAC diagnostics.

100 mm vane probe head

: 0635 9430

100 mm vane probe head

Quick & Accurate Readings – Parallel measurement of air velocity, volume flow, and air temperature delivers fast and reliable diagnostics.

Image

: 0636 9770

High-precision humidity/temperature probe head

Intuitive: parallel determination of relative humidity and air temperature in indoor areas, including long-term measurement

90° angle for the attachment of vane probes (Ø 100 mm) with universal handle

: 0554 0991

90° angle for connecting vane probes (Ø 100 mm)

Ideal for Ceiling Outlets – Accurately position Ø 100 mm vane probes for precise airflow measurements.

Transport case for air flow measurements

: 0516 1400

Transport case for air flow measurements

Durable Construction – Sturdy plastic case designed to withstand the rigours of transport and fieldwork.

  • testo 400 universal IAQ instrument, silicone hoses, mains unit with USB cable, calibration protocol, instruction manual (0560 0400)
  • Hot wire probe with Bluetooth® including temperature and humidity sensor (consisting of hot wire probe head, handle adapter and Bluetooth® handle), 4 x AA batteries, telescope (can be extended up to 1.0 m) and calibration protocol (0635 1571)
  • Vane probe head (Ø 100 mm) including temperature sensor, bracket for testovent measurement funnel and calibration protocol (0635 9430)
  • High-precision humidity/temperature probe head including calibration protocol (0636 9770)
      Please do not use the probe head in condensing atmospheres. For continuous application in high-humidity ranges
      > 80% RH at ≤ 30 °C for > 12 h
      > 60% RH at > 30 °C for > 12 h
      please get in touch with Testo Service or contact us via the Testo website
  • 90° angle for connecting vane probes (Ø 100 mm) (0554 0991)
  • Transport case for air flow measurements (0516 1400)

Comfort probes

Turbulence probe (digital), wired

: 0628 0152

Turbulence probe (digital) - wired

Intuitive operation – Clearly structured measurement menu for determining turbulence and draught risk.

£ 945.00 £ 1,134.00
CO2 probe (digital) with Bluetooth® including temperature and humidity sensor

: 0632 1551

CO₂ probe (digital) - with Bluetooth® including temperature and humidity sensor

Intuitive – Clearly structured measurement menu for long-term measurement and parallel determination of CO₂ concentration, humidity, and air temperature in indoor areas.

£ 550.00 £ 660.00
Lux probe (digital) for measuring illuminance, wired

: 0635 0551

Lux probe (digital) - for measuring illuminance, wired

Assesses light using the V-lambda curve  -  matching the spectral sensitivity of the human eye—ideal for workplace assessments.

£ 375.00 £ 450.00
CO2 probe (digital) including temperature and humidity sensor, wired

: 0632 1552

CO₂ probe (digital) - including temperature and humidity sensor, wired

Intuitive: clearly structured measurement menu for long-term measurement and parallel determination of CO₂ concentration, humidity and air temperature in indoor areas

£ 479.00 £ 574.80
CO2 probe head including temperature and humidity sensor

: 0632 1550

CO₂ probe head including temperature and humidity sensor

Intuitive – Simultaneous measurement of CO₂ concentration, humidity, and air temperature in indoor areas, with long-term measurement capability.

£ 435.00 £ 522.00
CO probe (digital) with Bluetooth®

: 0632 1271

CO probe (digital) - with Bluetooth®

Intuitive – Clear, easy-to-use measurement menu for long-term monitoring of CO concentrations in indoor areas like boiler rooms.

£ 370.00 £ 444.00

Food probes

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: 0615 2211

Stainless steel food probe NTC with TUC connector

NTC Sensor – Ensures precise core temperature measurements.

£ 119.00 £ 142.80
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: 0615 3311

Waterproof stainless steel food probe NTC with TUC connector

NTC Sensor – Ensures precise core temperature measurements.

£ 140.00 £ 168.00
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: 0615 2411

Robust food penetration probe NTC with TUC connector

Robust NTC food penetration probe with special handle, reinforced PUR cable

£ 109.00 £ 130.80
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: 0615 3211

Frozen food probe (NTC) - for screw-in use with TUC connector

Corkscrew Tip – Screws directly into frozen food without pre-drilling.

£ 175.00 £ 210.00

Humidity probes

Humidity/temperature probe (digital) with Bluetooth®

: 0636 9731

Humidity/temperature probe (digital) - with Bluetooth®

Intuitive: clearly structured measurement menu for long-term measurement and parallel determination of the relative humidity and air temperature in indoor areas

£ 205.00 £ 246.00
Humidity/temperature probe (digital), wired

: 0636 9732

Humidity/temperature probe (digital) - wired

Intuitive: clearly structured measurement menu for long-term measurement and parallel determination of the relative humidity and air temperature in indoor areas

£ 169.00 £ 202.80
Humidity/temperature probe head

: 0636 9730

Humidity/temperature probe head

All-in-One Monitoring – Simultaneous measurement of relative humidity and air temperature, perfect for indoor environmental assessments.

£ 105.00 £ 126.00
High-precision humidity/temperature probe (digital) with Bluetooth®

: 0636 9771

High-precision humidity/temperature probe (digital) - with Bluetooth®

Intuitive: clearly structured measurement menu for long-term measurement and parallel determination of the relative humidity and air temperature in indoor areas

£ 485.00 £ 582.00
High-precision humidity/temperature probe (digital), wired

: 0636 9772

High-precision humidity/temperature probe (digital) - wired

Intuitive: clearly structured measurement menu for long-term measurement and parallel determination of the relative humidity and air temperature in indoor areas

£ 455.00 £ 546.00
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: 0636 9770

High-precision humidity/temperature probe head

Intuitive: parallel determination of relative humidity and air temperature in indoor areas, including long-term measurement

£ 450.00 £ 540.00

Pitot tubes

Staurohr

: 0635 2045

Stainless steel Pitot tube, length 500 mm, Ø 7 mm - for measuring flow velocity

Accurate Velocity Measurement – Enables precise flow velocity readings when paired with a suitable pressure measuring instrument.

£ 169.00 £ 202.80
Staurohr

: 0635 2145

Stainless steel Pitot tube, length 350 mm, Ø 7 mm - for measuring flow velocity

Reliable Velocity Measurement – Accurately determines flow velocity in ducts and open systems.

£ 159.00 £ 190.80
Staurohr

: 0635 2345

Stainless steel Pitot tube, length 1000 mm, Ø 7 mm - for measuring flow velocity

Robust Performance – Made from high-grade stainless steel, suitable for harsh and contaminated environments.

£ 460.00 £ 552.00
Straight Pitot tube

: 0635 2043

Straight Pitot tube 360 mm

For measuring flow velocities, e.g. in ventilation ducts or process air

£ 299.00 £ 358.80
Straight Pitot tube

: 0635 2143

Straight Pitot tube 500 mm

For measuring flow velocities, e.g. in ventilation ducts or process air

£ 365.00 £ 438.00
Straight Pitot tube

: 0635 2243

Straight Pitot tube 1000 mm

For measuring flow velocities, e.g. in ventilation ducts or process air

£ 504.00 £ 604.80

Pressure probes

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: 0560 1510

testo 510i Digital Manometer - Bluetooth Differential Pressure Gauge Smart Probe

Measurement of gas flow and static pressure

£ 125.00 £ 150.00
testo 549i

: 0560 2549 02

testo 549i - High-pressure gauge operated via smartphone

Measurement of high and low pressure

£ 85.00 £ 102.00

Surface probes

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: 0615 1912

Waterproof surface probe NTC with TUC connector

NTC temperature sensor – for high-precision measurements.

£ 89.00 £ 106.80

Temperature probes

testo 805i

: 0560 1805

testo 805i - Bluetooth Infrared Thermometer Smart Probe

Non-contact infrared measurement of surface temperature

£ 105.00 £ 126.00
High-precision immersion/penetration probe (digital)

: 0618 0275

High-precision immersion/penetration probe (digital) - with Pt100 temperature sensor

Exceptional accuracy – Achieves system accuracy of up to ±0.05 °C with a resolution of 0.001 °C.

£ 500.00 £ 600.00
Immersion/penetration probe (digital)

: 0618 0073

Immersion/penetration probe (digital) - with Pt100 temperature sensor

High accuracy – Achieves temperature measurements with an accuracy of up to ±0.15 °C.

£ 255.00 £ 306.00
Glass-coated laboratory probe (digital)

: 0618 7072

Glass-coated laboratory probe (digital) - with Pt100 temperature sensor

Ideal for corrosive media – Glass-coated design for use in aggressive substances.

£ 225.00 £ 270.00
Robust, fast-action air probe (digital)

: 0618 0072

Robust, fast-action air probe (digital) - with Pt100 temperature sensor

Fast response time – Exposed sensor allows for quick air temperature readings.

£ 255.00 £ 306.00
Flexible temperature probe (digital)

: 0618 0071

Flexible temperature probe (digital) - with Pt100 temperature sensor

Flexible probe shaft – Ideal for temperature measurements in hard-to-reach locations.

£ 462.00 £ 554.40

Velocity

Hot wire probe (digital) with Bluetooth® including temperature and humidity sensor

: 0635 1571

Hot wire probe (digital) - with Bluetooth® including temperature and humidity sensor

Four-in-One Measurement - Simultaneously captures air velocity, volume flow, air temperature, and humidity – essential for comprehensive HVAC diagnostics.

£ 745.00 £ 894.00
Hot wire probe (digital) including temperature and humidity sensor, wired

: 0635 1572

Hot wire probe (digital) - including temperature and humidity sensor, wired

Comprehensive HVAC Measurement – Simultaneous detection of air velocity, volume flow, air temperature, and humidity for efficient ventilation assessments.

£ 745.00 £ 894.00
Hot wire probe head including temperature and humidity sensor

: 0635 1570

Hot wire probe head including temperature and humidity sensor

Intuitive: parallel determination of relative humidity and air temperature in indoor areas, including long-term measurement

£ 560.00 £ 672.00
Vane probe (Ø 16 mm, digital) with Bluetooth®, including temperature sensor

: 0635 9571

Vane probe (Ø 16 mm, digital) - with Bluetooth®, including temperature sensor

Reliable Precision – Accurate results across a wide range of flow velocities (+0.6 to +50 m/s), optimised for peak performance above 5 m/s.

£ 782.00 £ 938.40
Vane probe (Ø 16 mm, digital) including temperature sensor, wired

: 0635 9572

Vane probe (Ø 16 mm, digital) - including temperature sensor, wired

Clear Operation – Intuitive measurement menu for fast configuration of air velocity, volume flow, and temperature data.

£ 720.00 £ 864.00
16 mm vane probe head including temperature sensor

: 0635 9570

16 mm vane probe head including temperature sensor

Accurate Velocity Range – Measures flow velocities from +0.6 to +50 m/s with high precision across a wide range of HVAC applications.

£ 545.00 £ 654.00

Sets

testo 400 air flow kit with hot wire probe

: 0563 0400 71

testo 400 air flow kit with hot wire probe

Complete airflow solution – Includes probes for hot wire, vane (Ø 100 mm), and high-precision humidity/temperature measurements

£ 2,995.00 £ 3,594.00
testo 400 air flow kit with 16 mm vane probe

: 0563 0400 72

testo 400 air flow kit with 16 mm vane probe

Complete IAQ and airflow kit – Measures velocity, humidity, temperature, CO₂, CO, and more with included 16 mm and 100 mm vane probes

testo 400 IAQ and comfort kit with tripod

: 0563 0401

testo 400 IAQ and comfort kit with tripod

All-in-one comfort and IAQ assessment – Measures PMV/PPD, turbulence, CO₂, temperature, humidity, and more in compliance with standards

£ 3,745.00 £ 4,494.00

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Accessories

IAQ data logger for long-term measurements

: 0577 0400

IAQ data logger for long-term measurements

Flexible configuration – Easily set up via the testo 400 universal IAQ instrument.

£ 926.00 £ 1,111.20
Measuring tripod for IAQ and comfort level measurements

: 0554 1591

Measuring tripod for IAQ and comfort level measurements - to ensure standard-compliant positioning of the probes

Standard-Compliant Positioning – Ensures accurate positioning of measuring instruments and up to 8 probes for IAQ and comfort level measurements.

£ 450.00 £ 540.00
Transport case for air flow measurements

: 0516 1400

Transport case for air flow measurements

Durable Construction – Sturdy plastic case designed to withstand the rigours of transport and fieldwork.

£ 180.00 £ 216.00
Transport case for IAQ and comfort level measurements

: 0516 2400

Transport case for IAQ and comfort level measurements

Tailored Fit – Designed specifically for IAQ (Indoor Air Quality) and comfort level measurement tools like the testo 400.

£ 315.00 £ 378.00
Universal cable handle for connecting probe heads

: 0554 2222

Universal cable handle for connecting probe heads

Wired Transmission – Transmit readings to your measuring instrument via a fixed cable (1.4 m).

£ 79.00 £ 94.80
Universal Bluetooth® handle for connecting probe heads

: 0554 1111

Universal Bluetooth® handle for connecting probe heads

Wireless Measurement – Transmit readings conveniently via Bluetooth® without any cables.

£ 115.00 £ 138.00

Sensor heads

16 mm vane probe head including temperature sensor

: 0635 9570

16 mm vane probe head including temperature sensor

Accurate Velocity Range – Measures flow velocities from +0.6 to +50 m/s with high precision across a wide range of HVAC applications.

£ 545.00 £ 654.00
High-precision 100 mm vane probe head including temperature sensor

: 0635 9370

High-precision 100 mm vane probe head including temperature sensor

Integrated Temperature Measurement – Provides parallel readings of air velocity, volume flow, and temperature for comprehensive diagnostics.

£ 745.00 £ 894.00
100 mm vane probe head

: 0635 9430

100 mm vane probe head

Quick & Accurate Readings – Parallel measurement of air velocity, volume flow, and air temperature delivers fast and reliable diagnostics.

£ 345.00 £ 414.00
Hot wire probe head including temperature and humidity sensor

: 0635 1570

Hot wire probe head including temperature and humidity sensor

Intuitive: parallel determination of relative humidity and air temperature in indoor areas, including long-term measurement

£ 560.00 £ 672.00
Humidity/temperature probe head

: 0636 9730

Humidity/temperature probe head

All-in-One Monitoring – Simultaneous measurement of relative humidity and air temperature, perfect for indoor environmental assessments.

£ 105.00 £ 126.00
Image

: 0636 9770

High-precision humidity/temperature probe head

Intuitive: parallel determination of relative humidity and air temperature in indoor areas, including long-term measurement

£ 450.00 £ 540.00
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Testo Ltd
Newman Lane
GU34 2URAlton
HampshireUnited Kingdom
01420 544433

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