Data sheet
testo 300

Flue gas analyzer
testo 300 NEXT LEVEL°C

Intuitive measurement menus with fast-response
Smart-Touch display

hPa

Efficient, wireless parallel measurement of up tofour testo Smart Probes simultaneously

O2

Practical second screen function and easy data integration
into user-specific software

CO/H2

Documentation on site and reports sent by e-mailvia testo Smart AppNO

Versatile probes and fast probe changes by the user
ΔPΔTThe compact testo 300 NEXT LEVEL flue gas analyzer
is operated completely via the large touch display. You
can see all the measuring values straight away on thiswithout scrolling. The particularly scratch-resistant screen
is embedded in a robust plastic housing which stands up
reliably to the rigours of everyday use. From standby mode,the flue gas analyzer is ready to go at the touch of a button.
Menus for the most important measurements are alreadystored and they guide you safely through the respective
application. The testo Bluetooth© Connector enables theefficient, wireless measurement of up to four additionalparameters in parallel. The testo Smart Probe 115i for flow
and return temperature measurement, the testo Smart Probe
510i for gas flow and static gas pressure measurement
and the Smart Probe testo 915i for combustion air
temperature measurement are integrated into your testo 300
NEXT LEVEL via the testo Bluetooth© Connector and themeasurements can be carried out in parallel with the fluegas analysis. All measurements appear automatically on thedisplay and can be started and stopped in parallel. Thanks
to the practical second-screen function via convenient
integration into the testo Smart App, you can keep a
constant eye on all the relevant measurement data, evenover long distances between the measuring instrument andthe burner control. Reports can be created and sent directlyon site via the testo 300 NEXT LEVEL and integration in thetesto Smart App. You can easily call up the measurements
stored on your testo 300 NEXT LEVEL and transfer themto your in-house software (via the previously programmedinterface) using the new QR code. The testo 300 NEXTLEVEL is available with a 4-year or 2-year warranty. Inaddition, the testo 300 NEXT LEVEL can be equippedwith an optional NO, NOlow or COlow sensor. The O₂ sensorinstalled in all Longlife models is extremely durable andautomatic dilution up to max. 30,000 ppm CO protects theCO sensor.

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testo 300

testo 300 NEXT LEVEL – THERE’S NO ALTERNATIVE
Why make measurements complicated when you canand time-consuming. But it doesn’t have to be that way!

keep them simple? The daily work routine is becoming

Efficient, wireless measurement of up to four additional

more and more demanding. Time is getting scarcer, whileparameters in parallel via the testo Smart Probes – thanks

processes are becoming more complex. However, on

to the new testo 300 NEXT LEVEL! Featuring a practicalthe other hand, some things unfortunately don’t change:

second screen and intuitive operation – it really couldn’t be

Instrument operation and documentation are cumbersome

easier.

Intuitive measurement menus
with responsive Smart-Touch display
Efficient, wireless parallel measurementof up to 4 Smart Probes simultaneously
Practical 2nd screen functionand easy data integration into user-specific software
Documentation on site
and reports sent by e-mail (via App)
Versatile probes
and fast probe changes by the user
Magnetic holder to secure the instrument
and robust workmanship
Ready to measure immediately from standby
mode at the touch of a button
Measurement report can be signedon the instrument itself
High-resolution colour display
TüV-tested
according to EN50379, part 1 and 3

ROBUST

testo Smart App
for free download2

testo 300

Intuitive measurement menus
with fast-response Smart-Touch display
The testo 300 NEXT LEVEL makes flue gas measurement
unbelievably easy thanks to its intuitive operation. The
Smart-Touch display responds immediately without anydelay. That allows intuitive operation – just as easy as onyour smartphone.
SmartTouch

Efficient, wireless parallel measurementof up to 4 Smart Probes simultaneously
Wireless parallel measurements in record timeEfficient, wireless measurement of up to four additionalparameters in parallel via the testo Smart Probes:• testo 510i: Differential pressure measuring instrument(measurement of gas flow or static pressure)• testo 115i: Temperature measuring instrument(measurement of flow/return temperature with 2 SmartProbes)• testo 915i: Combustion air temperature measurement(time-saving without wired probes or additional measuringinstruments)

Practical second screen function and easy
data integration into user-specific software
Thanks to the practical second screen function andintegration into the testo Smart App, you can keep a
constant eye on all the relevant measurement data, evenover long distances between the measuring instrument
and the burner control – this saves time and unnecessaryjourneys. Integrating the data from all readings into youruser-specific software is easy:• Option 1: via universal QR code (ZIV-compatible)• Option 2: via WLAN/Bluetooth© / App-to-Appwith the testo 300

3testo 300

Instrument models and accessories

testo 300 flue gas analyzer
Order no.

Longlifesensors

O₂ sensor

CO sensor

CO H₂ sensor

NO sensor, NOlow
sensor and
COlow sensor
retrofittable

Zeroing withprobe in flue gas–––––

NO sensor, NOlow
sensor and
COlow sensor
retrofittable

Zeroing withprobe in flue gas

0633 3002 70–

4,000 ppm

0633 3002 71–

8,000 ppm

testo 300 Longlife flue gas analyzer
Order no.

Longlifesensors

O₂ sensor

0633 3004 720633 3004 730633 3004 820633 3004 88

CO sensor

CO H₂ sensor

4,000 ppm–––

8,000 ppm
15,000 ppm–

30,000 ppm

Longlife sensors
High-end sensors with a service life of up to 6 years for intensive use (several times a day). At least one sensor replacement is saved in thecourse of a normal working life.

Spare gas sensors/retrofitting

Order no.

O2 sensor, with 4-year warranty

0393 0023

CO sensor (without H2 compensation), with 4-year warranty

0393 0051

CO sensor (without H2 compensation), with 2-year warranty

0393 0053

CO sensor, H2-compensated, with 4-year warranty

0393 0101

CO sensor, H2-compensated, with 2-year warranty

0393 0105

COlow sensor, H2-compensated, with 2-year warranty

0393 0103

NO sensor

0393 0151

NOlow sensor

0393 0152

Accessories

Order no.

testo Bluetooth®printer, including 1 roll of thermal paper, rechargeable battery and mains unit, for instruments
including the testo 300, testo 330i and testo 440

0554 0621

Spare thermal paper for printer, permanent ink

0554 0568

Smoke pump, including oil and soot paper, for measuring soot in flue gas, excluding probe stop cone (order no.
0554 9010)

0554 0307

Filter paper for determining soot number, 40 measuring strips for approx. 200 measurements

0554 0308

USB mains unit, including USB cable0554 1106

testo EasyHeat PC software for displaying measurement procedures as diagrams, tables and for customer datamanagement.

0554 3332

ISO calibration certificate, flue gas

0520 0055

Cases and carrying bags

Order no.

Instrument case (height: 130 mm) for instrument, probes and accessories

0516 3300

Instrument case with double base (height: 180 mm) for instrument, probes and accessories

0516 3301

testo 300 instrument bag with carrying strap

0516 3001

testo Bluetooth® Connector

Order no.

testo Bluetooth® Connector for connecting the testo 300 flue gas analyzer to testo Smart Probes
When you purchase a new testo 300 NEXT LEVEL, the testo Bluetooth Connector is included in the scope of delivery.
The testo Bluetooth® Connector is only designed for connecting testo Smart Probes.
®

40554 3004

testo 300

Suitable kits

testo 300 kits
testo 300
Kit 1

testo 300
Kit 1 with printer

Order no.

0564 3002 70

0564 3002 71

Instrument, including mains
unit

O₂, CO,4,000 ppm,

O₂, CO,4,000 ppm,Probe, including 10 spare
filters

Compact flue gas probe(180 mm, Ø 6 mm)

Compact flue gas probe(180 mm, Ø 6 mm)

Printer, including spare
paper

–

testo EasyHeat PC software
Instrument bag
Smart Probes compatible
Connection to Smart App
Warranty

2 years

2 years

Illustration may differ from original.

testo 300 Longlife kits
testo 300
Longlife kit 1
Order no.

0564 3004 70

testo 300
Longlife kit 1
with printer0564 3004 71

Instrument, including mains
unit

O₂, CO, 4,000 ppm,NO, NOlow, COlow sensor
retrofittable

O₂, CO, 4,000 ppm,NO, NOlow, COlow sensor
retrofittable

O₂, CO H₂, 30,000 ppm,
NO, NOlow, COlow sensor
retrofittable

O₂, CO H₂, 30,000 ppm,
NO, NOlow, COlow sensor
retrofittable

Probe, including 10 spare
filters

Compact flue gas probe(180 mm, Ø 6 mm)

Compact flue gas probe(180 mm, Ø 6 mm)

Modular flue gas probe(180 mm, Ø 8 mm)

Modular flue gas probe(180 mm, Ø 8 mm)

Printer, including sparepaper–testo 300Longlife kit 20564 3004 82

testo 300
Longlife kit 2with printer0564 3004 89–

testo EasyHeat PC software
Instrument case
Smart Probes compatible
Connection to Smart App
Warranty

4 years

4 years

4 years

4 years

Illustration may differ from original.

5

testo 300

Probes and accessories

6

Modular flue gas probes

Order no.

Modular flue gas probe, including probe stop cone for fixing; thermocouple NiCr-Ni; hose 2.2 m; dirt filter;
Length 180 mm; Ø 8 mm; Tmax. +500 °C; TÜV-tested

0600 9760

Modular flue gas probe, including probe stop cone for fixing; thermocouple NiCr-Ni; hose 2.2 m; dirt filter;
Length 300 mm; Ø 8 mm; Tmax. +500 °C; TÜV-tested

0600 9761

Modular flue gas probe, including probe stop cone for fixing; thermocouple NiCr-Ni; hose 2.2 m; dirt filter;
Length 180 mm; Ø 6 mm; Tmax. +500 °C

0600 9762

Modular flue gas probe, including probe stop cone for fixing; thermocouple NiCr-Ni; hose 2.2 m; dirt filter;
Length 300 mm; Ø 6 mm; Tmax. +500 °C

0600 9763

Flexible flue gas probe; thermocouple NiCr-Ni; hose 2.2 m; dirt filter; length 330 mm; Ø 9 mm;
Tmax. +180 °C; short-term +200 °C; ideal for measurements in difficult-to-access locations

0600 9770

Compact flue gas probes

Order no.

Compact basic flue gas probe, 180 mm, Ø 6 mm, Tmax. +500 °C

0600 9740

Compact basic flue gas probe, 300 mm, Ø 6 mm, Tmax. +500 °C

0600 9741

Probe accessories and probe filters

Order no.

Modular probe shaft; length 180 mm; Ø 8 mm; Tmax. +500 °C

0554 9760

Modular probe shaft; length 300 mm; Ø 8 mm; Tmax. +500 °C0554 9761

Probe shaft; length 335 mm; including probe stop cone; Ø 8 mm; Tmax. +1,000 °C0554 8764

Probe shaft; length 700 mm; including probe stop cone; Ø 8 mm; Tmax. +1,000 °C

0554 8765

Flexible probe shaft; length 330 mm; Ø 9 mm; Tmax. +180 °C0554 9770

Multi-hole probe shaft; length 300 mm; Ø 8 mm; for CO averaging

0554 5762

Multi-hole probe shaft; length 180 mm; Ø 8 mm; for CO averaging

0554 5763

Hose extension; 2.8 m; probe-instrument extension line0554 1202

Spare dirt filter, modular probe, 10 off

0554 3385

Spare dirt filter, compact probe, 10 off

0554 0040

Probe stop cone with spring clamp and handle, Tmax. +200 °C, material Teflon, Ø 6 mm

0554 3327

Probe stop cone with spring clamp and handle, Tmax. +200 °C, material Teflon, Ø 8 mm

0554 3328

More probes and accessories

Order no.

Dual wall clearance probe for O2 air input measurement0632 1260

Ambient CO probe (digital), fixed cable0632 1272

Solid fuel kit, including probe shaft, adapter

0600 9765

Hose connection kit with adapter for testo 300 for separate gas pressure measurement(Gas pipe test with the pressure test kit in conjunction with the testo 300, testo 330-2 LL is not DVGW TRGI
2018-compliant. For standard-compliant measurements, use of the testo 324 is recommended.)0554 1203

Pressure connection hose, single, Ø 4/6 mm

0554 0449

Capillary hose kit for 4 Pa measurement (can only be used in combination with 0554 1203)

0554 1215

Pressure test kit for gas pipe test, testo 300, testo 330-1/-2 LL version 20100554 1213

Temperature probes

Order no.

Combustion air temperature probe with 190 mm probe shaft, including probe stop cone and magnetic holder forsecuring

0600 9799

Clamp probe with NTC temperature sensor for measurements on pipes (Ø 6 to 35 mm)

0615 5505

Pipe wrap probe (NTC) for pipe diameters from 5 to 65 mm

0615 5605

Waterproof immersion/penetration probe with NTC temperature sensor

0615 1212

Temperature probe with Velcro (NTC)0615 4611

testo 300

testo Smart Probes
testo Smart Probes

Order no.

testo 510i, differential pressure measuring instrument with smartphone operation, including hose kit (Ø 4 mm and 5mm) with adapter, batteries and calibration protocol

0560 1510

testo 115i, clamp thermometer with smartphone operation, for measurements on pipes of 6 to max. 35 mm diameter, 0560 2115 02
including batteries and calibration protocol
Wireless Smart Probe testo 915i with air probe (TC Type K), including batteries and calibration protocol

0563 3915

testo Bluetooth® Connector

Order no.

testo Bluetooth Connector for connecting the testo 300 flue gas analyzer to testo Smart Probes

0554 3004®

When you purchase a new testo 300 NEXT LEVEL, the testo Bluetooth® Connector is included in the scope of delivery.
The testo Bluetooth® Connector is only designed for connecting testo Smart Probes.

Technical data
Measurement parameter

Measuringrange

Accuracy (±1 digit)

Solution

O2 measurement

0 to 21 vol.%±0.2 vol.%0.1 vol.%

CO measurement(without H2 compensation)

0 to 4,000 ppm±20 ppm (0 to 400 ppm)
±5% of m.v. (401 to 2,000 ppm)
±10% of m.v. (2,001 to 4,000 ppm)

1 ppm

CO measurement(with H2 compensation)

0 to 8,000 ppm±10 ppm or ± 10% of m.v. (0 to 200 ppm)
±20 ppm or ± 5% of m.v. (201 to 2,000 ppm)
±10% of m.v. (2,001 to 8,000 ppm)

1 ppm

CO measurement(without H2-compensation withdilution)

0 to 15,000 ppm±200 ppm or ± 20% of m.v.

1 ppm

CO measurement(with H2 compensation anddilution)

0 to 30,000 ppm±100 ppm or ± 10% of m.v.

1 ppm

COlow measurement(with H2 compensation)

0 to 500 ppm±2 ppm (0 to 40 ppm)
±5% of m.v. (remaining measuring range)

0.1 ppm

NO measurement

0 to 3,000 ppm±5 ppm (0 to 100 ppm)
±5% of m.v. (101 to 2,000 ppm)
±10% of m.v. (2,001 to 3,000 ppm)

1 ppm

NOlow measurement

0 to 300 ppm±2 ppm (0 to 39.9 ppm)
±5% of m.v. (40 to 300 ppm)

0.1 ppm

Efficiency testing (Eta)

0 to 120%

Flue gas loss

0 to 99.9%

CO2 determination(digital calculation from O2)

Display range
0 to CO2 max.

±0.2 vol.%0.1 vol.%Draught measurement-9.99 to +40 hPa±0.005 hPa (0 to 0.1 hPa)
±0.02 hPa (0.1 to +3.00 hPa)
±1.5% of m.v. (+3.01 to +40 hPa)

0.001 hPa (0 to 0.1 hPa)
0.01 hPa (remaining meas.
range)

4 Pa measurement(for instruments with dilution)-50 to +50 Pa±0.3 Pa (< 10 Pa)±3% of m.v. (remaining measuring range)

0.1 PaPressure measurement-100 to +200 hPa±0.5 hPa (0 to +50.0 hPa)
±1 % of m.v. (+50.1 to +100.0 hPa)
±1.5% of m.v. (+100.1 to +200 hPa)

0.01 hPa

Temperature (instrument)-40 to +1200 °C±0.5 °C (0.0 to +100.0 °C)±0.5% of m.v. (remaining measuring range)

0.1°C (-40 to +999.9°C)
1 °C (remaining measuringrange)

Ambient CO measurement(internal/flue gas probe)

0 to 2,000 ppm±10 ppm (0 to 100 ppm)
±10% of m.v. (101 to 2,000 ppm)

1 ppm

Ambient CO measurement(external with CO probe)

0 to 500 ppm±3 ppm (0 to 29 ppm)
±10% of m.v. (30 to 500 ppm)

1 ppm

0.1%
0.1%

7

testo 300

Technical data

Certification

The testo 300 is TÜV-tested according to 1st German Federal Immission Control Ordinance (BImSchV) EN
50379, Parts 1-3

Storage temperature-20 to +50 °C

Operating temperature-5 to +45 °CCharging temperature

0 to +45 °C

Humidity application range

15 to 90 %RH, non-condensing

Power supply

Rechargeable battery, USB mains unit

Rechargeable battery life

10 h

Protection class

IP 40

System requirements

Requires iOS 11.0 or newer, Android 6.0 or newer, mobile device with Bluetooth 4.0

Wireless range

Up to 100m with no obstructions

Testo BT Connector

Interface for connecting testo Smart Probes to the measuring instrument

Memory1 million measuring values

Display

5.0" touch display, HD 1280*720 pixels, IPS (160 k)

WeightApprox. 800 gDimensions

L: 244 mm (including probe connection) H: 59 mm W: 98 mm

testo 300 warranty

Instrument/probe/gas sensors
O2, CO sensor
24 months
Thermocouple and rechargeable battery

testo 300 Longlife warranty

Instrument/probe/gas sensors
48 months
O2, CO sensor
24 months
NO, NOlow, COlow sensor
Thermocouple and rechargeable battery
https://www.testo.com/guarantee

12 months
Subject to change, including technical modifications.

Warranty terms

1981 7114/dk/TT/06.2022

General technical data

12 months

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