testo 350 - Kits for Engine Testing

Unleash Your Engine's Horsepower!
Produce maximum horsepower with the lowest emissions using the testo 350. The ideal analyzer for emission testing and engine optimization.

Producing maximum horsepower with the lowest emissions is critical for power generation, natural gas compression, or for the combination of heating and power generation (CHP).

Testo Engine Tuning and Testing Document Download Testo's PDF and learn more about proper engine tuning and testing. See what combustion characteristics contribute to detonation problems. See how engine emission develops and how the testo 350 can be used for both tuning and emission testing. Download the PDF to get a better understanding of how proper engine setup can provide better combustion and lower emissions.

Engine-specific menus on the test 350 take the guess work out of testing.Just select the rich burn or lean burn application. Rich-burn engine exhaust, when uncontrolled, can have wide concentration ranges and both CO and NOX can fluctuate significantly. The patented CO dilution system will automatically set-up for optimum testing, perfect for a rich burn engine test.  Learn more by downloading our FREE whitepaper!

The patented dilution system extends the sensor ranges (specifically needed for engine testing) and provides greater sensor protection as an extra benefit. It also provides a true measurement of CO. This system eliminates the cross-sensitivity problems other analyzers exhibit in their CO measurements.

View the Engine Testing Kit Configuration Sheet

Measures both NO and NO2 for proper engine set up and unsurpassed accuracy.

Active gas conditioning is mandatory for EPA and high accuracy testing and the 350's integrated gas conditioning system (thermoelectric cooler with automatic condensate removal pump) delivers dry basis data as required for most reporting.

The powerful pump automatically controls sample flow rate for EPA accuracy.

 testo 350 engine probe
 The testo 350 engine probe.

The 350 engine probe is specifically designed for engine testing. The pressure relief hose makes testing right or left cylinder banks easier. Stack temperature can be measured with optional thermocouples. Teflon lined sample hoses provide the highest level of accuracy. Heavy particulate loading from diesels are easily handled with the sintered filter options. Heated sample lines and the industrial probe option cover all your testing requirements.

EPA Engine Testing Regulations

EPA engine testingThe new federal guidelines for testing stationary Reciprocating Internal Combustion Engines (RICE) have made their way into the field. The National Emission Standards for Hazardous Air Pollutions (NESHAP) 40 CFR subpart ZZZZ (aka "quad Z") addresses one type of engine testing criteria. The New Source Performance Standards (NSPS) subpart JJJJ (aka "quad J") addresses still another set of engines and testing criteria. You can learn more about the standards by reviewing the official EPA Implementation Question and Answer Document.

In both the quad Z and J standards, portable electrochemical (EC) emission analyzers are accepted for testing. Since the late 1990s, Testo's analyzers have demonstrated that both high accuracy and low cost are achievable.

Tecsoft Reporting Software - Techsoft Testing & Emissions Compliance Software integrates the Testo 350 and the simplicity of Excel into the fastest and most flexible testing software available.  More Info




Innovative multi-unit simultaneous testing (Quad Z Testing Solution)

testo 350 pre and post testThe testo 350 portable emission analyzer greatly reduces the hardware and software needed and make data logging and review easier. Two analyzers can be linked to display the catalyst measurements. It's simple and the cost for this system is also substantially lower than the traditional trailer mounted testing rigs.

It starts by connecting two probes and analyzer boxes to the exhaust stack. Each analyzer is specifically configured for the different gas conditions found in pre- and post-catalyst exhaust gas. Then both analyzers are connected to the handheld control unit the high def. graphic display in the control unit shows the side-by-side measurements. Communication through Testo’s data “BUS” system makes it all possible.

easyEmission Software

Data collection and interpretation is much easier when you know the actual pre- and post-catalyst measurement in real time. Managing data is the next critical requirement and Testo takes this capability further in its easyEmission software.  Not only can the simultaneous measurement be displayed in a variety of formats with simple two analyzer operation, easyEmission can display measurements of up to 16 analyzer boxes for the ultimate in simultaneous, multi-unit testing.

Contact Testo for a demonstration or call toll-free 800-227-0729.


Use it for local, state and federal testing:

  • EPA CTM 030 & 034
  • ASTM - D6522
  • EPA 7E


Multi-port testing for better combustion control. Sometimes a single sample location is just not enough. Connect (BUS) two analyzers together for faster testing and a better understanding of pre- and post-catalyst performance.