Testo 440 Specifications

Data sheet

testo 440
testo 440 dP

Air velocity &
IAQ meters

- testo440 air velocity & IAQ meter

- testo440 dP air velocity & IAQ
meter incl. dierential pressure

Intuitive: Clearly structured measurement menus for
volume flow, heating & cooling load, K-factor, turbulence,
data logging, mold indication, and more.

Convenient: Testo 440 kits include instrument-specific
wireless and wired probes that offer greater measuring
convenience and the instrument also connects to testo
smart probes.

Space-saving: A universal Bluetooth or wired handle for
all probes means more applications, with less equipment.

Ecient: Internal memory for up to 7,500 measurement
points, a USB interface for data export and optional
printout of all your measuring values.

The testo 440 air velocity and IAQ meter combines all
the benefits of a compact handheld device with intuitive
measurement menus and a comprehensive selection of air
velocity & IAQ probes. This means you have all measuring
tasks on air conditioning and ventilation systems reliably
under control.

°F

%RH

fpm

inH2O

Compatible with a wide
selection of Bluetooth® and

wired probes.

even a data logging mode are stored on the instrument
for additional convenience. These menus enable you to
accomplish the relevant measuring task more quickly, more
efficiently and more reliably than ever before. Reports can
also be exported as excel files via the USB interface or
printed out directly on site.

CO

CO

Lux

2

You can connect the testo 440 to a large selection of digital
probes, the testo Smart Probes, or even numerous Testo
temperature probes, allowing for numerous configurations
to meet your needs. The clearly structured menus for
measuring volume flow in ducts and at outlets, cooling/
heating load, K-factor, turbulence, mold indication and

The testo 440 air velocity & IAQ meter is available in two
versions. The standard testo 440 and the testo 440 dP
model version, which includes an integrated differential
pressure sensor. This makes measurements at filters as well
as Pitot tube and K-factor measurements possible.

www.testo.com

testo 440

The testo440 probe system

Completely versatile: a universal handle for all air velocity &
IAQ probes. This saves space and reduces weight, enabling
you to perform accurate measurements in any application.

testo440 probe handle, adapter and telescope
for testo440 air velocity probes

testo440 probe handle and adapter
for testo440 air velocity probes

With the testo440, you can handle any air conditioning and
ventilation system measurements that come your way.

0.63 inch vane probe head incl.
temperature sensor

Hot wire probe head incl.
temperature and humidity
sensor

High-precision 4 inch vane
probe head incl. temperature
sensor

4 inch vane probe head incl.
temperature sensor

testo440 probe heads for air velocity incl. temperature and
humidity sensor

CO probe head

CO₂ probe head incl.
temperature and humidity
sensor

High-precision humidity probe
head

Humidity probe head

testo440 probe handle (Bluetooth or fixed cable)

Probe heads for humidity, CO, CO2 and temperature

Advantages during measurement

All testo 440 air velocity probes
for measurements in ducts have
an optional scaled, extendible
telescope (extends from 3 to 6.5
feet).

The 4 inch vane probe can be
easily combined with the 90°
angle and telescope, making
measurements at ceiling outlets
easier.

Do you need to carry out
measurements in places where
Bluetooth isn't possible? No
problem: simply switch the probe
head over from Bluetooth to the
cable handle and you're ready
to go.

With the testo440 dP model,
which includes a differential
pressure sensor, you can ensure
that the filters in air conditioning
systems are working properly and
no contamination in the outdoor
air contamination gets indoors.

testo 440

Ordering data for testo440

testo440 testo440 dP

Air velocity & IAQ meter, 3 x AA batteries, USB
cable and calibration protocol.

Order no. 0560 4401 Order no. 0560 4402

Air velocity & IAQ meter with integrated
differential pressure sensor, connection
hose, 3 x AA batteries, USB cable and
calibration protocol.

Technical data
testo440

testo440 testo440 dP

Temperature (NTC)

Measuring range -40.0 to 302.0 °F

Accuracy (±1 digit) ±1 °F (-40 to -13.2 °F)

Resolution 0.1°F

Temperature (TC)

Measuring range -328 to 2498 °F

Accuracy (±1 digit) (±0.2 °F + 0.3% of m.v.)

Resolution 0.1°F

Dierential
pressure

Measuring range

Accuracy (±1 digit) ±0.02 InH₂O (0 to 0.40 InH₂O)

Resolution 0.1 InH2O

Probe connections

TC type K 1x

NTC TUC / digital
probe with cable

Bluetooth probe 1x digital Bluetooth probe

Differential pressure – +

Technical data

Operating temperature -4 to 122 °F

Storage temperature -4 to 122 °F

Battery type 3 x AA batteries

Battery life 12 h (typically vane measurement)

Weight 8.8 oz

Dimensions 6.1 x 2.6 x 1.3 in.

±1 °F (-40 to -13.2 °F)

±0.7 °F (167 to 211.8 °F)

±0.5% of m.v. (remaining meas. range)

-60 to +60 InH2O

–

or testo Smart Probe

±0.1 InH₂O + 0.6 InH₂O

(0.40 to +60 InH₂O)

1x

The wired digital probes and the NTC probes
of the testo 440 all have a convenient
TUC connection (Testo Universal Connector).

testo 440

Ordering data for kits

Kits for measurement in ducts, at outlets, and at filters

testo440 delta P

Air Flow ComboKit 1 with BT

- testo440 dP air velocity & IAQ measuring instrument incl.
differential pressure with internal memory and data export function

- Universal probe handle with Bluetooth

- Hot wire probe head incl. temperature and humidity sensor

- 4 inch vane probe head incl. temperature sensor

- Telescopic extension (3 feet) and 90° angle to fit both probes

- Combo case for testo440 dP and multiple probes

Order no. 0563 4409

testo440 delta P

Air Flow ComboKit 2 with BT

- testo440 dP air velocity & IAQ measuring instrument incl.
differential pressure with internal memory and data export function

- Universal probe handle with Bluetooth

- 0.63 inch vane probe head incl. temperature sensor

- 4 inch vane probe head incl. temperature sensor

- Humidity probe head incl. temperature sensor

- Telescopic extension (3 feet) and 90° angle to fit both probes

- Combo case for testo440 dP and multiple probes

Order no. 0563 4410

Kits for measurements in ducts and at outlets

testo440

Air Flow ComboKit 1 with BT

- testo440 air velocity & IAQ measuring instrument with internal
memory and data export function

- 4 inch vane probe with Bluetooth, incl. temperature sensor

- Hot wire probe with telescope (33.5 inch) incl. temperature sensor,
fixed cable (6 feet)

- Measurement menu, e.g. for determining the volume flow

- Combo case for testo440 and multiple probes

Order no. 0563 4406

testo440

Air Flow ComboKit 2 with BT

- testo440 air velocity & IAQ measuring instrument with internal
memory and data export function

- 4 inch vane probe with Bluetooth, incl. temperature sensor

- 0.63 inch vane probe with telescope (33.5 inch), fixed cable (6 feet)

- Measurement menu, e.g. for determining the volume flow

- Combo case for testo440 and multiple probes

Order no. 0563 4407