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  Testo 310
  Measure. Print. Done.
  testo 310. Flue gas analysis the easy way.
  The new testo 310 combines simple functions with a high level of measurement accuracy, and is thus perfect for all basic measurements on heating systems.
  Long battery lifetimes of up to 10 hours guarantee you high availability. Its easy handling and compact design make it a robust tool for daily work even when things get rough. The printer specially developed for the testo 310, including infrared interface, allows you to easily create clear reports on site.
Robust and light instrument for daily use - excellently suitable even for rough and dirty surroundings.
Testo 310 Specifications Illuminated display
Two-line display and clear menu structure. Easy to operate and clearly legible.
Automatic zeroing of sensor
Automatic zeroing of the gas sensor in only 30 seconds after starting, which can be cancelled if not required.
Lithium rechargeable battery
Operation with lithium rechargeable battery (1500 mAh) no need to change battery, up to ten hours running time, charging via USB possible.
Probe filter
Quickly and easily exchangeable
Integrated magnets for easy fixing to burner.
Condensate trap
Integrated condensate trap very quickly and easily emptied.
Documentation via infrared interface.
Flue gas measurement
In this central measurement in the course of flue gas analysis, you directly determine CO and O 2 content as well as the ambient and flue gas temperatures. From these values, the testo 310 calculates all further measurement parameters such as CO 2 concentration, degree of effectivity and flue gas loss.
Ambient CO measurement
With this safety measurement, you determine whether flue gas spillage is spreading in the vicinity of the heating system. This can cause high CO concentrations in heating and living rooms. Because these are life-threatening, this meaurement should alsways be carried out first.
Draught measurement
Draught measurement ensures that the flue gas from a heating system is correctly drawn off through the flue. With this measurement, you determine whether the system has the correct negative pressure. At the same time, the flue gas temperature is measured.
Differential pressure measurement
The differential pressure measurement tests the gas supply to gas boilers. To do this, you measure the difference between the pressure in the gas line and the ambient pressure. The measurement is important for the adjustment of the jet pressure.
  Measuring range Accuracy 1 digit Resolution Adjustment
time t90

Temperature (flue gas)

0.0 to 400.0 C 1 C (0,0 to 100,0 C)
1.5 % of reading ( > 100 C)
0.1 C < 50 sec

Temperature (Ambient temperature)

-20 to +100.0 C 1 C 0.1 C < 50 sec

Draught measurement

-20.00 to +20,00 hPa 0.03 hPa (-3.00 to +500 hPa)
1.5% of m.v. (remaining range)
0.01 hPa

Press. measurement

-40,00 to +40.0 hPa 0.5 hPa 0.1 hPa

O2 measurement

0,0 to 21.0 vol.% 0.2 vol.% 0.1 Vol. % 30 sec

CO measurement (without
H2 -compensation)

0 to 4000 ppm 20 ppm (0 to 400 ppm)
1,5 % of reading (401 to 2000 ppm)
10 % of reading (2001 to 4000 ppm)
1 ppm 60 sec

Ambient CO measurement

0 to 4000 ppm 20 ppm (0 - 400 ppm)
1,5 % of reading (401 to 2000 ppm)
10 % of reading (2001 to 4000 ppm)
1 ppm 60 sec

Determination degree of effectivity (Eta)

0 to 120 % 0.1 %

Exhaust gas loss

0 to 99,9 % 0.1 %

General technical data

Storage temp.

-20.0 C to +50,0 C

Oper. temp.

-5 to +45 C

Power supply

Rech. batt.: 1500 mAh, mains unit 5V / 1A


No memory


Backlit 2-line display

Weight (with probe)

approx. 700 g


201 x 83 x 44 mm


Measuring instrument, flue gas probe, gas sensors: 24 months
Thermocouple: 12 months
Rech. batt.: 12 months
Your direct contact to Testo
Testo India Pvt Ltd
Plot No.: 23, Sind Society, Baner Road, Aundh, Pune - 411007,
Maharashtra, India.
Tel. : +91 20 65600 203
Fax : +91 20 25850 080
Email :
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Testo India Pvt Ltd
Plot No.: 23, Sind Society, Baner Road, Aundh,
Pune - 411007, Maharashtra, India.
Tel.: +91 20 65600 203    Fax.: +91 20 25850 080