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Testo 338 Industrial Smoke Tester
  • Testo 338 Industrial Smoke Tester
  • Testo 338 Industrial Smoke Tester
  • Testo 338 Industrial Smoke Tester

Testo 338 Industrial Smoke Tester

testo approved distributor

Includes: testo 338 portable industrial diesel particulate meter with Bluetooth, flue gas sampling probe, TopSafe instrument protection case, power supply, manual, and spare filter paper

0632 3381
£3,203.10 Save 10%
Tax excluded
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The Testo 338 is a mobile measuring instrument which allows you to measure the degree of blackening both easily and efficiently. It is the first and only mobile measuring instrument which measures the degree of blackening automatically, without any additional analysis. This enables an efficient and professional smoke-count analysis of the engine to be made in a matter of seconds, using one manageable, user friendly piece of equipment.

It contains an optical, a temperature and a differential pressure sensor. Together, these sensors create a consistent picture of the degree of blackening. The measurement results can be printed out and documented on site. In addition to this, the measurement data can be transferred to the flue gas analyser Testo 330 or a computer via Bluetooth and stored there. Typical applications for the Testo 338 include: Diesel power or heating engines, Ship-owning and ship-building companies on marine engines, Industrial engines/turbines, Mining and prospecting, Construction machines and land-moving vehicles.

The testo 338 is the answer to the ever-increasing number of state and local regulations affecting diesel engine soot and particulate emissions. The 338 doesn’t require specialised training or certification to operate and provides a digital reading in mg/m3 mass units or FSN/Bosch number values. The 338 can also help to quickly determine if the diesel particulate trap or control pollution device is working correctly.


Rugged and portable makes it easy to carry to the desired application site.
Can determine soot concentration (mg/m3 and Filter Smoke Number (FSN) or Bosch Number for use in a variety of applications.
Easy, one-handed operation for use with the touch of a button.
Bluetooth connection allows for optionaql on-site printout of data (bluetooth version only).

Testo 338 Specifications
FSN Bosch Number
Measuring range 0 to 2.5 *
Resolution 0.01 *
Repeatability < 0.08 FSN *
*at reference conditions 1000 mbar, +25 °C.
Soot Concentration
Measuring range 0 to 70 mg/m3.
Resolution 0.01 mg/m3.


< 1.5 mg/m3 (0 to 5 mg/m3)
< 1.25 mg/m3 +5 % of mv (5 to 70 mg/m3).
General technical data
Protection class IP40, TopSafe.
Interface IRDA / optional Bluetooth.
Memory 200 measuring values.
Storage battery type Lithium ion.
Battery life approx. 4 h cont. operation.
Application temperature Individual measurements up to +932 °F / Individual measurements up to +500 °C.
Max. pos. press./flue gas 300 mbar*
Test sample volume 0.4 litres (range: 0 to 0.3 FSN); 0.2 litres (range: 0.2 to 2 FSN).
Measurement period ˂ 60 s per measurement cycle.
Flow-through measurement Differential pressure sensor.
Optical sensor Opacity of the filter load in %.
*at higher pressures, a higher measurement inaccuracy occurs.


Testo 338 Brochure

PDF Brochure of the Testo 338 Portable Industrial Diesel Smoke Tester.

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Testo 338 Industrial Smoke Tester
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