Data sheet
testo 320

Highly efficient fluegas analyzer
testo 320 – Just a few “clicks”
away from a heating system
diagnosis

O2

High-resolution colour graphic display
CO2

Quick and easy menu structure
Storage space for 500 measurement values

COMeasurement of flue gas, draught, pressure, ambient CO,
differential temperature and gas leak detectionhPa

O2 and CO sensor and flue gas probe with temperature
probe

qA

TÜV-tested according to EN 50379, Parts 1-3

Eta°C

The new testo 320 is a high-quality measuring instrument

Standarized menu procedures, which are stored in thefor efficient flue gas analysis. Its wide measuring range

instrument specifically for your country, simplify operation

makes it a reliable partner for eliminating malfunctions– depending on which standards you are dealing with. The

and emergencies, monitoring legal limit values or for daily

high-resolution display allows a detailed presentation of theroutine work servicing heating systems. The numerous

measurement procedures and is easily legible even undermeasurement menus of the testo 320 are clearly structured.

the worst conditions.

www.testo.com

testo 320

Product properties

High-resolution colour graphic display
The measurement menus and measurement
values are presented in detail and always
easily legible.

Sensor monitoring
Integrated traffic light system which
continuously monitors the sensor
functionality.

Fast sensor zeroing
Automatic zeroing of the sensor in only 30
seconds after start-up, and which can becancelled if not required.

Sensors exchangeable by the user
Easy exchange of sensors by the user – noadjustment necessary.

MemoryUp to 500 measurement protocols can besaved and called up in the memory of thetesto 320.

Lithium batteryOperation with a Lithium battery (1500mAh)– no battery change necessary, up to eight
hours running time, charging via USB
connection possible.

Attachment
Integrated magnets for fast attachment toburner/boiler.

testo 320

Stamp of approval
The flue gas analyzer testo 320 is TÜV-tested
according to EN 50379, Parts 1-3.

Robust design
Robust, durable instrument – ideally suitedeven to rough surroundings.

Condensate trap
Integrated condensate trap – very easily
emptied.

Efficient exchange of probes
Fast and easy exchange of probes via theprobe coupling. All gas paths are connectedto the instrument at once with the bayonet
connection.

Probe filter
Easy exchange of probe filter.

Flexibility with modular probes
A range of probe lengths and diameters
ensure a high degree of flexibility for all
applications. To exchange the probe shaft,
it is simply placed on the probe handle andengages.

testo 320

Ordering data / Accessories

testo 320 set for heating
constructors
0632 3220
0554 1105
0516 3300
0554 0549
0600 9741

testo 320 with H2-compensated CO sensor
USB mains unit
System case (height: 130 mm)
Testo fast printer IRDACompact flue gas probe(length 300 mm, Ø 6 mm)
Combustion air probe (length190 mm)

0600 9787

Measuring instrument with options
testo 320 flue gas analyzer, incl. O2 sensor, calibration protocol, graphic display

Part no.
0632 3220

Option CO sensor without H2-compensation
Option H2-compensated CO sensor
Option COlow sensor
Bluetooth option
Spare gas sensors

Part no.

Spare sensor O2 for testo 320

0393 0005

Spare CO sensor (without H2-compensation) for testo 3200393 0053

Spare CO sensor H2-compensated for testo 3200393 0105

Spare COlow sensor for testo 320

0393 0103

Smoke tester with oil and soot sheet, for measuring soot in flue gas, excl. cone (part no. 0554 9010)

0554 0307

Testo Bluetooth /IRDA printer incl. 1 roll of printer paper, rechargeable battery and mains unit

0554 0620

Testo fast printer IrDA with wireless infrared interface; 1 roll thermal paper; 4 AA batteries

0554 0549

Spare thermal paper for printer, permanent ink

0554 0568

PC analysis software easyheat, for presenting measurement procedures as diagrams, tables
and for managing customer data

0554 3332

USB mains unit incl. cable0554 1105

Spare battery

0515 5046®

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

ISO calibration certificate/flue gas

0520 0003

testo 320

ProbesCompact basic flue gas probes

Part no.

Flue gas probe compact; length 180 mm; Ø 6 mm; Tmax. 500 °C; probe stop; NiCr-Ni thermocouple, 2.2 m hose andparticle filter included

0600 9740

Flue gas probe compact; length 300 mm; Ø 6 mm; Tmax. 500 °C; probe stop; NiCr-Ni thermocouple, 2.2 m hose andparticle filter included

0600 9741

Modular flue gas probes

Part no.

Flue gas probe modular, incl. cone for attachment; thermocouple NiCr-Ni; hose 2.2 m; particle filter; length 180mm; Ø 8 mm; Tmax. 500 °C; TÜV-tested

0600 9760

Flue gas probe; length 300 mm; Ø 8 mm; Tmax. 500 °C; TÜV approval; probe stop; NiCr-Ni thermocouple; 2.2 m
hose and particle filter included

0600 9761

Flue gas probe; length 180 mm; Ø 6 mm; Tmax. 500 °C; probe stop; NiCr-Ni thermocouple; 2.2 m hose andparticle filter included

0600 9762

Flue gas probe; length 300 mm; Ø 6 mm; Tmax. 500 °C; probe stop; NiCr-Ni thermocouple; 2.2 m hose andparticle filter included

0600 9763

Flue gas probe flexible; thermocouple NiCr-Ni; hose 2.2. m; dirt filter; length 330 mm; Ø 9 mm; Tmax. 180 °C;
short-term 200 °C; ideal for measuring at inaccessible points

0600 9770

Probe accessories

Part no.

Probe shaft; length 180 mm; 8 mm; Tmax. 500 °C

0554 9760

Probe shaft; length 300 mm; Ø 8 mm; Tmax. 500 °C

0554 9761

Probe shaft flexible; length 330 mm; Ø 9 mm; Tmax. 180 °C

0554 9770

Probe shaft multi-hole; length 300 mm; Ø 8 mm; for mean CO calculation

0554 5762

Probe shaft multi-hole; length 180 mm; Ø 8 mm; for mean CO calculation

0554 5763

Hose extension; 2.8 m; extension cable for probe

0554 1202

Hose connection set with adapter for separate gas pressure measurement0554 1203

Spare dirt filter, modular probe; 10 off0554 3385

Spare particle filter, compact probe; 10 off

0554 0040

testo 320

ProbesAdditional probes

Part no.

Dual wall clearance probe for O2 supply air measurement0632 1260

Gas leak detection probe; 0 to 10000 ppm CH4/C3H80632 3330

Ambient CO probe, for detecting CO in buildings and rooms; 0 to +500 ppm

0632 3331

Differential temperature set; consisting of 2 Velcro probes and temperature adapter

0554 1208

Fine pressure probe: highly accurate probe for the measurement of differential pressure andtemperature, as well as Pitot tube measurement of flow velocities (see technical data)

0638 0330

Capillary hose set for 4 Pa measurement0554 1215

Combustion air temperature probes

Part no.

Combustion air temperature probe, immersion depth 190 mm

0600 9787

Combustion air temperature probe, immersion depth 60 mm

0600 9797

Additional temperature probes

Part no.

Mini ambient air probe; for separate ambient air temperature measurement; 0 to +80 °C

0600 3692

Very fast reaction surface probe

0604 0194

Connection cable

0430 0143

testo 320

Technical data
Adjustment timet90

Measuring range

Accuracy ±1 digitResolution

Temperature-40 to +1200 °C±0.5 °C (0 to +100.0 °C)±0.5 % of m.v. (remaining range)

0.1 °C (-40 to +999,9 °C)
1 °C (> +1000 °C)

Draught
measurement-9.99 to +40 hPa

Pressuremeasurement

0 to +300 hPa

O2 measurement

0 to 21 Vol. %±0.02 hPa or ±5% of m.v. (-0.50 to +0.60 hPa)
±0.03 hPa (+0.61 to +3.00 hPa)
±1.5% of m.v. (+3.01 to +40.00 hPa)
±0.5 hPa (0.0 to 50.0 hPa)
±1% of m.v. (50.1 to 100.0 hPa)±1.5 % of m.v. (remaining range)±0.2 Vol. %0.01 hPa
with fine draught option
0.001 hPa
0.1 hPa
with fine draught option
0.01 hPa
0.1 Vol. %< 20 sCO measurement(withoutH2-compensation)

0 to 4000 ppm

1 ppm< 60 sCO measurement(H2-compensated)

0 to 8000 ppm±20 ppm (0 to 400 ppm)
±5% of m.v. (401 to 2000 ppm)
±10% of m.v. (2001 to 4000 ppm)
±10 ppm or ±10% of m.v. (0 to 200 ppm)
±20 ppm or ±5% of m.v. (201 to 2000 ppm)
±10% of m.v. (2001 to 8000 ppm)

1 ppm

< 40 sDetermination of degreeof effectivity (Eta)

0 to 120%

0.1%

Flue gas loss

0 to 99.9%

0.1%

CO2 determination

Display range
0 to CO2 max±0.2 Vol. %0.1 Vol. %Option COlow
measurement(H2-compensated)

0 to 500 ppm±2 ppm (0 to 39.9 ppm)
±5% of m.v. (remaining range)

0.1 ppm

Ambient CO
measurement (withCO probe)

0 to 500 ppm±5 ppm (0 to 100 ppm)
±5% of m.v. (> 100 ppm)

1 ppm

Gas leakmeasurement for
flammable gases(with gas leakdetection probe)

Display range
0 to 10.000 ppm
CH4 / C3H8Signal
optical display (LED)audible signal via buzzer

Ambient CO2
measurement (withambient CO2 probe)

0 to 1 Vol. %0 to 10.000 ppm±50 ppm or ±2% of m.v. (0 to 5000 ppm)
±100 ppm or ±3% of m.v. (5001 to 10000 ppm)

Differential
pressure, flow
velocity andtemperature via finepressure probe±10.000 Pa±0.3 Pa (0 to 9.99 Pa) plus ±1 Digit±3% of m.v. (10 to 10.000 Pa) plus ±1 Digit

digital calculation from O2

0.15 to 3 m/s
max. -40 to +1,200 °C(dependent on probe)< 40 s<2s±0.5 °C (-40 to 100 °C)±0.5 % of m.v. (rem. measuring range)plus probe accuracy

0.1 m/s
0.1 °C

General technical data
Storage temperature-20 to +50 °C

Display

Colour graphic display 240 x 320 pixels

Operating temperature-5 to +45 °C

Weight573 g

Power supply

Battery: 3.7 V / 2,400 mAh
Mains unit: 6 V / 1.2 A

Dimensions

240 x 85 x 65 mm

Memory500 measurement values

Guarantee

Instrument/probe/gas sensors: 24 months
Thermocouple/rech. battery:
12 months
https://www.testo.com/guarantee

Guarantee conditionsSubject to change without notice.

0981 2884/msp/I/01.2020

testo 320www.testo.com