Stock Code
0632 3223

TESTO Compact Flue Gas Analyzer | TESTO 320 Basic
Flue gas measurement on heating systems with a compact flue gas analyzer for oil and gas: the testo 320 basic features all the essential functions for carrying out flue gas analysis, flue draught and pressure measurements. The flue gas analyzer is impressive because it is easy to operate (featuring user-friendly menu guidance) and reliable (2-year warranty for the instrument, probe, O2/CO sensor).

Your Advantages
- Self-explanatory menu guidance with standardized measuring procedures for quick, easy handling
- Sensors can be changed by the user
- Easy to operate thanks to single-hose connection
- TÜV-tested according to EN 50379 Part 1-3 and to 1st German Federal Immission Control Ordinance (BImSchV), Part 1-2
TESTO Compact Flue Gas Analyzer | TESTO 320 Basic Description
testo 320 basic flue gas analyzer: compact and powerful
Fields of application for the testo 320 basic flue gas analyzer
Delivery Scope
TESTO Compact Flue Gas Analyzer | TESTO 320 Basic Technical Data
General technical data
Flue gas O₂
Temperature
Flue gas degree of effectivity, Eta (calculated)
Flue gas loss (calculated)
Flue gas CO₂ calculation (calculated from O₂)
Pressure measurement
Flue gas CO (without H₂-compensation)
Ambient CO
TESTO Compact Flue Gas Analyzer | TESTO 320 Basic Images



You will find the testo 320 basic flue gas analyzer a reliable tool for carrying out installation and maintenance work on heating systems. A compact flue gas analyzer, it can be used to measure flue gas, draught, pressure, ambient CO and differential temperature.
Self-explanatory menu guidance makes operation simpler and makes your job easier. Thanks to the high resolution colour display, the readings are easy to read off even when the light is poor. The flue gas analyzer can store up to 20 measurement protocols. It is possible to export the measurement protocols in Excel optionally via mini-USB.
Quality that you can depend on: the testo 320 basic flue gas analyzer is TÜV-tested according to EN 50379, Part 1-3 and to 1st German Federal Immission Control Ordinance (BImSchV), Part 1-2. When you purchase the flue gas analyzer, you get a 2-year warranty (for the instrument, probe, O2/CO sensor).
testo 320 basic flue gas analyzer: compact and powerful
- Flue gas analysis on heating systems: the testo 320 basic flue gas analyzer is equipped with two sensors – an O2 and a CO sensor (without H2 compensation). In the case of CO measurement, the measuring range goes up to 4,000 ppm. You need a flue gas probe for the flue gas measurement (can be ordered separately). A temperature probe is integrated into the probe. All relevant flue gas measurement parameters can therefore be calculated: CO2 value, efficiency and flue gas loss. The flue gas analyzer is also suitable for flue draught measurements or pressure measurements
- Changing probes is easy: The probes can be changed by the user. This means you can order other probes specifically required for your flue gas analysis (e.g. multi-hole probe, dual wall clearance probe, flexible flue gas probe)
- Single-hose connection: in just one hand movement, all channels for the flue gas measurement can be securely connected via the probe coupling (gas paths, draught, temperature probe integrated in the flue gas probe, which can be ordered separately)
- Long service life thanks to the long-life Li-ion rechargeable battery
- Built-in magnets enable the flue gas analyzer to be attached to the burner/boiler quickly and easily
- Integrated condensate trap: easy to empty
Fields of application for the testo 320 basic flue gas analyzer
- Flue gas measurement (focus on gas: combustion air temperature, flue gas temperature, O2, CO and CO2 concentration, flue gas loss, gas/air ratio, efficiency)
- Gas flow and gas resting pressure (with optional hose connection set)
- Differential temperature measurement to determine the spread between flow and return (with optional differential temperature set)
Note: to carry out the measurement, you need a compact or modular flue gas probe (can be ordered separately)
Delivery Scope
Testo 320 basic flue gas analyzer with O2/CO sensor without H2 compensation, including calibration protocol, colour graphic display.
TESTO Compact Flue Gas Analyzer | TESTO 320 Basic Technical Data
Weight |
573 g
|
---|---|
Dimensions |
240 x 85 x 65 mm
|
Operating temperature |
-5 to +45 °C
|
Protection class |
IP40
|
Display size |
240 x 320 pixels
|
Display function |
Colour graphic display
|
Power supply |
Battery: 3.7 V / 2,400 mAh; Mains unit: 5 V / 1 A
|
Maximum | |
Storage temperature |
-20 to +50 °C
|
Flue gas O₂
Measuring range |
0 to 21 Vol.%
|
---|---|
Accuracy |
±0.2 Vol.%
|
Resolution |
0.1 Vol.%
|
Reaction time t₉₀ |
< 20 s
|
Differential Pressure flue gas Draught - Piezoresistive
Measuring range |
-9.99 to +40 hPa
|
---|---|
Accuracy |
±1.5 % of mv (+3.01 to +40.00 hPa)
±0.03 hPa (+0.61 to +3.00 hPa)
±0.02 hPa or ±5 % of mv (-0.50 to +0.60 hPa)
|
Resolution |
0.01 hPa
|
Temperature
Measuring range |
-40 to +1200 °C
|
---|---|
Accuracy |
±0.5 % of mv (Remaining Range)
±0.5 °C (0 to +100.0 °C)
|
Resolution |
0.1 °C (-40 to +999.9 °C)
1 °C (> +1000 °C)
|
Flue gas degree of effectivity, Eta (calculated)
Measuring range |
0 to 120 %
|
---|---|
Resolution |
0.1 %
|
Flue gas loss (calculated)
Measuring range |
0 to 99.9 %
|
---|---|
Resolution |
0.1 %
|
Flue gas CO₂ calculation (calculated from O₂)
Measuring range |
0 to CO₂ max (Display range)
|
---|---|
Accuracy |
±0.2 Vol.%
|
Resolution |
0.1 Vol.%
|
Reaction time t₉₀ |
40 s
|
Pressure measurement
Measuring range |
0 to +300 hPa
|
---|---|
Accuracy |
±0.5 hPa (0.0 to 50.0 hPa)
±1.5 % of mv (Remaining Range)
±1 % of mv (50.1 to 100.0 hPa)
|
Resolution |
0.1 hPa
|
Flue gas CO (without H₂-compensation)
Measuring range |
0 to 4000 ppm
|
---|---|
Accuracy |
±10 % of mv (2001 to 4000 ppm)
±20 ppm (0 to 400 ppm)
±5 % of mv (401 to 2000 ppm)
|
Resolution |
1 ppm
|
Reaction time t₉₀ |
< 60 s
|
Ambient CO
Measuring range |
0 to 4000 ppm
|
---|---|
Accuracy |
±10 % of mv (2001 to 4000 ppm)
±20 ppm (0 to 400 ppm)
±5 % of mv (401 to 2000 ppm)
|
Resolution |
1 ppm
|
Measuring rate |
< 60 s
|
TESTO Compact Flue Gas Analyzer | TESTO 320 Basic Images


