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Testo 440 Hot Wire Kit

Testo
SKU: TESTO440HOTWIREKIT
  • Complete hot wire kit for professional duct airflow measurement
  • Telescopic probe extends to 0.85m for easier access in ducts
  • Expandable Testo 440 platform with USB data handling
More Info
Typically ships in 5-7 working days

Testo 440 Hot Wire Kit

The Testo 440 Hot Wire Kit is a professional solution for measuring air velocity, temperature and airflow in ventilation ducts. Supplied with the Testo 440 Air Velocity and IAQ measuring instrument and a wired hot wire probe with integrated temperature sensor, it is well suited to HVAC and building services engineers who need accurate duct measurements in day-to-day ventilation work.

A key strength of the kit is its suitability for measurements in deeper or harder-to-reach duct sections. The probe features an extendable telescope up to 0.85m with clear scaling, helping users position the sensor more effectively during airflow checks. Combined with the Testo 440’s structured menu system, this makes volume flow and duct air velocity measurement more straightforward and efficient on site.

The Testo 440 platform also gives the kit useful long-term flexibility. The instrument is compatible with additional Bluetooth and wired probes for wider IAQ work, while USB connectivity supports data export and reporting when documentation is needed. Supplied in a basic case, the kit offers a practical and expandable starting point for professional ventilation measurement.

Testo part number: 0563 4400

Key Features

  • Complete kit with Testo 440 measuring instrument and wired hot wire probe for duct airflow measurement
  • Measures air velocity, temperature and airflow in ventilation ducts
  • Hot wire probe with integrated temperature sensor for reliable duct measurements
  • Extendable telescope up to 0.85m for improved access to ducts
  • Clear, structured menus for volume flow and air velocity measurement
  • Testo 440 supports additional Bluetooth and wired probes for wider IAQ applications
  • USB interface for data handling and reporting
  • Probe measuring range of 0 to 30m/s with a 1.7m fixed cable and 9mm probe lead

What's In The Box?

  • Testo 440 Air Velocity and IAQ Measuring Instrument
  • Hot wire probe (Ø 9 mm) with fixed 1.7 m cable, integrated temperature sensor and extendable telescope
  • Basic case for Testo 440 and 1 probe
  • 3 x AA batteries
  • USB cable
  • Calibration protocol for Testo 440
  • Calibration protocol for Hot wire probe
Specification

Testo 440

Temperature – NTC

  • Measuring Range - -40 to +150°C
  • Accuracy:
    - ±0.4°C (-40 to -25.1°C)
    - ±0.4°C (+75 to +99.9°C)
    ±0.5% of mv (Remaining Range)
    ±0.3°C (-25 to +74.9°C)
  • Resolution – 0.1°C

Temperature – TC Type K (NiCr-Ni)

  • Measuring Range - -200 to +1370°C
  • Accuracy - ±(0.3°C + 0.3% of mv)
  • Resolution – 0.1°C

General Technical Data

  • Weight – 250g
  • Dimensions – 154 x 65 x 32mm
  • Operating Temperature - -20 to +50°C
  • Connectable Probes – 1 x digital probe with cable or 1 x Temperature NTC TUC, 1 x digital Bluetooth probe or Testo Smart Probe, 1 x Temperature TC Type K
  • Product Colour – black/orange
  • Battery Type – 3 x AA mignon 1.5V
  • Battery Life – 12h (typically vane measurement)
  • Interface – Bluetooth®; USB
  • Storage Temperature - -20 to +50°C

Hot wire probe

Temperature – NTC

  • Measuring Range - -20 to +70°C
  • Accuracy - ±0.5°C
  • Resolution – 0.1°C

Absolute Pressure

  • Measuring Range - +700 to +1100 hPa
  • Accuracy - ±3.0 hPa
  • Resolution – 0.1 hPa

Velocity – Hot wire

  • Measuring Range – 0 to 30m/s
  • Accuracy:
    - ±(0.5m/s + 5% of mv) (0 to 20m/s)
    - ±(0.03m/s + 4 % of mv) (20.01 to 30m/s)
  • Resolution – 0.01m/s

General Technical Data

  • Storage Temperature - -20 to +70°C
  • Weight – 90g
  • Dimensions – 315 x 12 x 12mm
  • Operating Temperature - -20 to +70°C
  • Cable Length – 1.7m
  • Length Telescope – 850mm
  • Probe Head Diameter – 9mm
  • Diameter Telescope – 12mm
  • Product Colour – Black; silver
  • Diameter Probe Shaft – 12mm