NEW!

Made to make it easy.
Our compact professional measuring instruments deliver
precise readings whenever you need them –fast, flexible, user-friendly and connected toyour smartphone. Measuring couldn’t be easier.
www.testo.com

The NEW testo
Compact Class

11 measuring instruments
9 measurement parameters
1 App
Endless possibilities.
Switch on, measure, and know more; immediately.

We also know that good measurement technology must also

Our new compact professional measuring instruments givebe smart - which is why our new Compact Class and youryou precise readings - easily and quickly. That is our promise

smartphone are true partners - thanks to the testo Smart App.

to you.
What are you waiting for?
Because we know that things have to move fast in your job
and that you need reliable measurement results immediately
in order to be able to carry on.

2

Air conditioning and ventilation systems

Vane
anemometer

Vane
anemometer

Comfort level

Hot wire
anemometer

CO2 measuring
instrument

Lux meter

Digitalthermohygrometertesto 417

testo 416

testo 425

testo 535

testo 545

testo 625

fpm, cfm, °F

fpm, cfm

fpm, cfm, °F

CO2

Lux

°F, %RH, °Fwb, °Ftp

m/s, m³/h, °C

m/s, m³/h

m/s, m³/h, °C°C, °Cwb, °Ctp

Temperature

Pressure measurement

Differential pressure
measuring instrument

Differential pressure
measuring instrument

Differential
temperature
measuring instrument

Temperature
measuring
instrument

NTC+ PT100
Temperature measuring
instrument
testo 110

testo 512-1

testo 512-2

testo 922

testo 925

psi, fpm, cfm

psi

°F

°F

°F

hPa/mbar, m/s, m³/h

hPa/mbar

°C

°C

°C
3

Compact precision for your jobs.
Testo's new compact professional measuring instruments are always there
when you need accurate readings fast.
Little time, endless to-do lists and complex tasks: These are

And with the testo Smart App, you not only have thethe moments when the new compact measuring instruments

most important measurement menus with you at all times -from Testo are reliably at your side.

documentation and measured value storage are possible atany time with your smart assistant (see App info from p. 12).

The right instrument for every relevant measurement
parameter: Simply turn it on and right away you have exactly
the reading you need to make the right decisions. In allimportant applications - fast, simple and precise.

Easy•	Compact design: Readily available, quickly stowed away.
•	Robust workmanship: When the going gets tough.
•	Intuitive operation: High-tech reduced to the essentials.
•	Print reports on site: Everything in black and white.
•	testo Smart App: Configure, save, document measurements,and much more (see p. 12).

Each instrument comes in a practical, compact,
and robust testo Smart Case

4

Fast
•	Measurement results immediately: With one look,everything is clear.
•	Configuration with the testo Smart App: Change
settings with just a few clicks.
•	Automatic volume flow calculation:
The duct diameter is enough.
•	Two displays show more than one: Show yourcustomers measurement curves on a smartphone,
In real time.

Precise•	Digital probes proven in practice: For long-term stable,
reproducible and accurate measurement results.
• Helpful measurement menus: Single-point and time
curve measurement in every instrument.
• Complex measurements, compactly simplified:
For example, very easy measurement, adjustments, anddocumentation of living space ventilation.
•	Documentation with the testo Smart App:
Completely without paperwork.

5

Air conditioning and ventilation systems

Air conditioning and ventilation systems
easily under control.
Compact flow velocity and volume flow measurement.
To ensure that people enjoy spending time indoors, airconditioning and ventilation systems are a crucial factor for
modern buildings.
Accordingly, it is important to ensure with the appropriate
measurement technology that sufficient fresh air is supplied
to the rooms and that stale air is discharged, with the best
possible efficiency, for all VAC units.

This is how the testo Smart App
supports you

With the new flow velocity measuring instruments from Testo,- Configure your measuring instrument

you can perform these tasks quickly, easily, precisely, and- Display graphical measured value curvewith smart App support: In ducts, at the outlets and when

- Save measurement data

adjusting the balanced residential ventilation.

- Customer and measuring location management- Documentation of your work
- E-mail dispatch of the report- Second screen capability

6Air conditioning and ventilation systems

testo 417 Digital 4 inch vane anemometer•S imple, fast and precise measurement of flow, volume flow andtemperature at air inlets and outlets•E fficient regulation of balanced residential ventilation and fast
documentation with the testo Smart App•F ast in-app configuration, graph history, second screen
and measurement data memory in the testo Smart App•T imed and multi-point mean calculation• Durability through compact design with robust housing
Order no. 0563 0417

testo 417 kit 1
Incl. funnel kit for plate outlets and ventilation grills.
Order no. 0563 1417
testo 417 kit 2
Includes kit 1, plus flow straightener for swirl vents.
Order no. 0563 2417

testo 416 Digital 5/8 inch vane anemometer• Simple, fast and precise flow measurement & volume flow
calculation in the ventilation duct
• More flexibility for duct measurements with the cable-connected
telescopic probe (maximum length 33 in.)• Fast in-app configuration, graph history, second screen
and measurement data memory in the testo Smart App• Timed and multi-point mean calculation• Durability through compact design with robust housing
Order no. 0563 0416

Digital hot wire anemometer testo 425• Simple, fast and precise flow and temperature measurement plus
volume flow calculation in the ventilation duct
• More flexibility for duct measurements with the cable-connected
telescopic probe (maximum length 32 in.)• Fast in-app configuration, graph history, second screen
and measurement data memory in the testo Smart App• Timed and multi-point mean calculation• Durability through compact design with robust housing
Order no. 0563 0425
7

Comfort level

Comfort easily under control.
For a more comfortable indoor climate.
Living, working or leisure: We spend almost 90% of our time

With the new compact measuring instruments from Testo, youindoors every day! The topics of indoor air quality andhave CO2, illuminance, temperature, and air humidity; quickly,

comfort could therefore hardly be more important for well-easily, and precisely in view - and therefore ensure comfort

being and health.

and a healthy climate indoors.

Digital CO2 measuring instrument testo 535• Simple, fast and precise measurement of CO2 concentration• Audible alarm sounds if a limit value is exceeded• Fast in-app configuration, graph history, second screen
and measurement data memory in the testo Smart App• High reproducibility of measurement results due to long-term stableinfrared sensor technology• Timed and multi-point mean calculation
Order no. 0563 0535 01
8

Comfort level

This is how the testo Smart App
supports you- Configure your measuring instrument- Display graphical measured value curve- Save measurement data
- Customer and measuring location management- Documentation of your work
- E-mail dispatch of the report- Second screen capability

Digital lux meter testo 545• Simple, fast and precise measurement of illuminance (lux)according to the V-lambda curve for all common light sources•W ide range of applications due to LED compatibility (except
single-color blue LED)•F ast in-app configuration, graph history, second screen
and measurement data memory in the testo Smart App•A udible alarm sounds if a limit value is exceeded•T imed and multi-point mean calculation
Order no. 0563 1545

Digital thermohygrometer testo 625• Simple, fast and precise measurement of air temperatureand relative humidity• Calculation of dewpoint and wet bulb temperature• Fast in-app configuration, graph history, second screen
and measurement data memory in the testo Smart App• Audible alarm sounds if a limit value is exceeded• Timed and multi-point mean calculation
Order no. 0563 1625
9

Pressure measurement

Pressure measurement easily under control.
Compact pressure measurement.
The new compact measuring instruments from Testo are also

testo 512 is also your reliable partner for general pressure

reliably at your side for two of the most important measure-measurement, checking filters and Pitot tube measure-ments on heating systems. For fast measurement results

ment .

when it counts.
With the testo 922 differential temperature measuring inWith the differential pressure measuring instrument testo 512,

strument, (p. 11), you have the supply/return temperature on

you can check the gas pressure on burners quickly and pre-heating circuit distributors under control.

cisely by measuring gas flow pressure and static gas pressure- indispensable for maintenance work on heating systems.

Digital differential pressure measuring instrument testo 512-1•S imple, fast and precise differential pressure measurement (0 to 80 inH20)
for checking filters and for Pitot tube measurement in the air duct
• Reliable measurement results due to position-independent differential
pressure sensor with high accuracy• Fast in-app configuration, graph history, second screen
and measurement data memory in the testo Smart App• Volume flow calculation in measuring instrument and App• Audible alarm sounds if a limit value is exceeded
Pro tip:
Ideal for measuring
gas flow/static gas
pressure.

Order no. 0563 1512

Digital differential pressure measuring instrument testo 512-2• Simple, fast and precise differential pressure measurement (0 to 800 inH20)• Fast in-app configuration, graph history, second screen
and measurement data memory in the testo Smart App• Audible alarm sounds if a limit value is exceeded• Timed and multi-point mean calculation• Durability through compact design with robust housing
Order no. 0563 2512

Pro tip:
Ideal for measuringhigh pressures.

This is how the testo Smart App
supports you- Configure your measuring instrument- Display graphical measured value curve- Save measurement data
- Customer and measuring location management- Documentation of your work

10

- E-mail dispatch of the report- Second screen capability

Temperature

Temperatures easily under control.
Measure the most important measurement value compactly.
Digital differential temperature measuring instrument testo 922•E asy, fast and precise differential temperature measurement with dual
thermocouple Type K probe (2 TC Type K probes included)•F ast in-app configuration, graph history, second screen
and measurement data memory in the testo Smart App•W ide range of applications due to large measuring range from -58 to 1,832 °F•L arge sensor selection optional and compatible with commercially available TC
Type K sensors
Pro tip:
Ideal for measuring flow/
return temperature.

•A udible alarm sounds if a limit value is exceeded
Order no. 0563 0922

Digital temperature measuring instrument testo 925-E asy, fast and precise temperature measurement with thermocouple Type Kprobe (1 TC Type K probe included)• Fast in-app configuration, graph history, second screen and measurement data
memory in the testo Smart App• Wide range of applications due to large measuring range
from -58 to 1,832 °F• Large sensor selection optional and compatible with commercially available TC
Type K sensors• Audible alarm sounds if a limit value is exceeded
Order no. 0563 0925

Temperature measurement in laboratory and food environment

Temperatures in the laboratory and foodenvironment easily under control.
Particularly precise, even at low temperatures.
Digital temperature measuring instrument testo 110•S imple, fast and particularly precise temperature measurement with NTC or
Pt100 sensor (optionally available)•F ast in-app configuration, graph history, second screen
and measurement data memory in the testo Smart App•H ACCP-compliant, certified according to EN 13485 for use in the foodsector•H
 igh-precision measurement results and high system accuracy with digital
Pt100 sensors (calibration without measuring instrument)•A udible alarm sounds if a limit value is exceeded
Order no. 0563 0110

11

One App for everything: That’s smart!
The testo Smart App will become your trusted partner.
What’s special about the new ones from Testo: You can

Easy to use - with the testo Smart App. Get the most out ofconfigure and use them according to your needs. Just

your new measuring instrument with the free App. And of

measure and nothing more? Not an issue at all. But you havecourse, the App and the measuring instrument simply connect

other settings in mind, you would like to save the measured

automatically.

values, and documentation is also important?

Easy•	Intuitive measurement menus•	Quick configuration•	Uncomplicated documentation

Fast•	Measurements displayed in just a few clicks•	All measurement values at a glance•	Graphic or tabular curve display

12

Efficient•	Storage of measurement and customer data•	Easy report generation and dispatch by e-mail• Second display

Clever•	Data exchange with PC software
testo DataControl•	Continuous updates and extensions•	Free download, free use

13

Want to be sure? Good.
All technical data at a glance.
Airconditioning
andventilation
systems

Product

Description

testo 416

testo 417

5/8 in, vane
anemometer withApp connection,
fixed telescope (max.
33 in.), incl. transport
bag and calibration
protocol4 inch vane
anemometer withApp connection,incl. transport bag
and calibration
protocolMeasurement
parameterm/s, fpm, m³/h, cfm,
l/s

Measuring range

118.1 to 7,874 fpm

Accuracy±(0.2 m/s
+1% of reading)Resolution

0.1 fpm

Classification
Battery (incl.)

IP40 (probe: IP20)
3 x AA

Battery life (h)60Connection testo
Smart App
Order no.

0563 0416

testo 417 kit 1

testo 417 kit 2

500563 0417

testo 425

4 inch vane anemometer 4 inch vane anemometer
Thermal hot wirewith App connection,with App connection incl.
anemometer withincl. measuring funnel for measuring funnel for plate App connection, fixedplate outlets, measuring outlets, measuring funnel telescope (max. 32 in.),funnel for ventilationfor ventilation grills, flow incl. transport bag andgrills, transport bag andstraightener, transport
calibration protocol
calibration protocol
bag and calibration
protocolm/s, fpm, °F, °C, m³/h,
m/s, fpm, °F, °C, m³/h, cfm, l/s
cfm, l/s
59.1 to 3,937 fpm
0 to 5,905 fpm
32° to 122 °F-4° to 158 °F±(5.91 fpm + 4% ofm.v.) (0 to 3,937 fpm)±(19.7 fpm + 1.5 % of M.V)±(98 fpm + 5% of m.v.)±0.9 °F(3937.1 to 5,905 fpm)
±0.9 °F
0.01 fpm
0.1 CFM (0 to +58.8 CFM)
0.01 fpm
1 CFM (+59 to +58857 CFM)
0.1 °F
0.1 °F
IP40 (probe: IP20)
IP40 (probe: IP20)
3 x AA
3 x AA

0563 1417

350563 2417

0563 0425

Pressuremeasurement

Product

testo 512-1

testo 512-2

Description

Differential pressure measuring instrument with App connection,measuring range 0 to 80 inH2O, audible alarm, incl. transport
bag and calibration protocol

Differential pressure measuring instrument with App
connection, measuring range 0 to 800 inH2O, audible
alarm, incl. transport bag and calibration protocol

Measurement
parameterPa, hPa/mbar, kPa, psi, inHg, inH₂O, mmH₂O,
mmHg, m/s, fpm, m³/h, cfm, l/s

Pa, hPa/mbar, kPa, psi, inHg,
inH₂O, mmH₂O, mmHg

Measuring range

14

0 to 80 inH2O

0 to 800 inH2O

Accuracy±(0.001 inH₂O + 1% of m.v.) ±1 digit (0 to 10 inH₂O)±(0.04 inH₂O + 1.5% of m.v.) ±1 digit (10.01 to 80 inH₂O)

0.5 %fs

Solution

0.001 hPa

1 hPa

Classification

IP 40

IP40

Battery (incl.)
Battery life (h)Connection testo
Smart App
Order no.

3 x AA120

3 x AA
120

0563 1512

0563 2512

Comfort
level

Product

testo 535

testo 545

Description

CO₂ measuring instrument with App
connection, audible alarm, incl.
transport bag and calibration protocol

Lux meter with App connection,
audible alarm, incl. transport bag andcalibration protocol

Measurement
parameterppm, %

lux, fc

0 to 10,000 ppm

0 to 100,000 lux

Measuring range

IP40 (probe: IP20)
3 x AA30±3% of m.v. ±1 digit(Class C, corresponding to DIN 5032-7/ EN 13032-1, Appendix B
f1 = 6% = V(Lambda) adjustment
f2 = 5% = cos-true evaluation
Total ≤15%)
0.1 lux (<10,000 lux)
1 lux (≥10,000 lux)
IP40 (probe: IP20)
3 x AA70

0563 0535 01

0563 1545

Accuracy±100 ppm +5 % of mv

Solution

1 ppm

Classification
Battery
Battery life
Connection testo
Smart App
Order no.

testo 625
Humidity and temperature measuring
instrument with App connection,
audible alarm, incl. transport bag andcalibration protocol%RH, °F, °F td, °F dp°C, °C td, °C dp
0 to 100 %RH-4 to 140 °F

2.5 %RH (5 to 95 %RH)
±0.9 °F

0.1 %RH
0.1 °F
IP40 (probe: IP20)
3 x AA
100

0563 1625

Temperature

Product

testo 922

testo 925

testo 110

Description

2-channel temperature measuring
instrument TC Type K with App
connection, audible alarm, incl.
transport bag, 2 x TC Type K probes
and calibration protocol

1-channel temperature measuring
instrument TC Type K with App
connection, audible alarm, incl.
transport bag, 1 x TC Type K probes
and calibration protocol

1-channel temperature measuring
instrument NTC / Pt100 with App
connection, TUC probe socket,
audible alarm, incl. transport bag
and calibration protocol

Measurement
parameter°F, °C°F, °C°F, °C-58 to 1,832 °F-58 to 1,832 °F

Accuracy±(0.9 °F + 0.3% of m.v.)(-58 to 1,832 °F)±(0.9 °F + 0.3% of m.v.)(-58 to 1,832 °F)

Solution

0.1 °F (-58 to 931.8 °F)
1 °F (rem. measuring range)

0.1 °F (-58 to 931.8 °F)
1 °F (rem. measuring range)

IP40 (optional TopSafe IP65)
3 x AA
120

IP40 (optional TopSafe IP65)
3 x AA
150

NTC: -58 to 302 °F
Pt100: -328 to 1,472 °F
NTC: ±0.36 °F (-4 to +176 °F)±0.54 °F (remaining meas. range)
Pt100: according to theprobe accuracy
NTC: 0.1 °F
Pt100: according to the probe
accuracy
IP40 (optional TopSafe IP65)
3 x AA
100

0563 0922

0563 0925

0563 0110

Measuring range

Classification
Battery
Battery life
Connection testo
Smart App
Order no.

15

Accessories & probes
Order no.

TopSafe protective silicone cover for testo 922/925/110 for IP65

0516 0224

Bluetooth®/IRDA printerincl. battery and power supply

0554 0621

Spare thermal paper for printer (6 rolls), measurement data documentation can be read for up to 10 years

0554 0568

Probe type
NTC/PT100 for testo 110

Probe shaft/probe shaft tip
dimensions

Pipe wrap probe (NTC) for pipe
diameters of 0.2 to 2.5 in.,
fixed cable 3.9 ft
Waterproof NTC immersion/
penetration probe, fixed cable 3.9 ft.

High-precision digital
Pt100 penetration probe formeasurements in liquids and pastes
with an accuracy of up to ±0.09 °F

Probe typeType K For testo 922/925

2 inØ 0.2 in

Ø 0.16 in

11.6 inAccuracy

Response
time

Order no.

-58 to 248 °F±0.36 °F (-13 to +176 °F)–

0615 5605-58 to 257 °F±0.5% of m.v. (212 to 302 °F)±0.4 °F (-13 to 166.8 °F)±0.7 °F (remaining meas.
range)

10 s

0615 1212-112 to 572 °F±0.54 °F (-112 to -40.001 °F)±(0.18 °F + 0.05% of m.v.)(-40 to 31.9 °F)±0.09 °F (32 to 212 °F)±(0.09 °F + 0.05% of m.v.)(212.01 to 572 °F)

t₉₀ <45 sec

0618 0275

Measuringrange

Accuracy

Response
time

Order no.

-76 to 752 °F

Class 2 1)

200 sec

0602 1793-76 to 572 °F

Class 2 1)

3 sec

0602 0393-40 to 1,832 °F

Class 1 1)

4 sec

0602 5693

Ø 0.16 inDimensions
Probe shaft/probe shaft tip

Robust air probe, TC Type K, fixedcable

4.5 inØ 0.16 inVery fast-reaction surface probewith sprung thermocouple strip,
also suitable for uneven surfaces,
measuring range briefly up to 932 °F,
TC Type K, fixed cable
Immersion measuring tip, flexible,
for measurements in air/flue gases(not suitable for measurements in
smelters), TC Type K

4.5 in.

Measuringrange

4.5 in.
Ø 0.19 in.

Ø 0.12 inØ 0.47 in.

39.4 in.

1) According to standard EN 60584-1, the accuracy of Class 2 refers to -40 to 2,192 °F.

www.testo.com

Subject to change, including technical modifications.

Accessories

2981 1434/B&B/msp/12.2022

More probes at www.testo.com