SCIOS Inspections: What is it? How it works.

Since Jan. 1, 2016, SCIOS inspection has been required by law. What exactly does a SCIOS inspection entail? We explain that to you in this article. A SCIOS inspection is simply no more than a special inspection for combustion plants. Emergency power units fall under combustion plants and the SCIOS inspection is therefore mandatory for these as well.

The reason SCIOS inspection is mandatory is because of environmental and safety reasons. Even if an emergency generator runs only when the power goes out. The SCIOS inspection consists of many different parts, also called scopes. Now, for emergency generators, not all scopes are relevant. The most relevant scopes for emergency generators are only scope 4, scope 6 and scope 7C. Here is some more information about the scopes in question:

  • Scope 4: The inspection of the internal combustion engine and gas turbines. It should always be performed on generators with a thermal input power of 20 kW or higher. Not sure if your generator is covered under this? We are happy to help you!
  • Scope 6: Emissions Measurement. It is mandatory for plants that run more than 500 hours per year. Is your plant running fewer hours? Then this emission measurement does not simply expire. You must be able to prove that your system actually runs less than 500 hours and that you are using the generator for emergency power only.
  • Scope 7C: Refers to inspection of fuel supply line. This scios scope applies only to plants with an external tank.

For a clearer overview regarding the different scopes, please see the image below.

Scheme SCIOS inspecties

Want to know more about SCIOS inspections?

Every situation is different. Therefore, we are happy to inform and advise you without obligation based on your specific situation and machine.
By contacting us, we can offer you customized advice and come up with a suitable solution together.

The SCIOS inspection basically consists of two steps: The First Special Inspection (EBI) and the Periodic Inspection (PI).

Step 1: First Special Inspection (EBI).

The First Special Inspection applies only when you have an aggregate that has never been inspected. This inspection verifies that the installation and design of the genset meet applicable standards and regulations. Inspection instructions and limits are then established. These are relevant to subsequent inspections and are an essential step in the procedure. ABATO Engines’ mechanics are all SCIOS certified and can perform this inspection for you.

Step 2: Periodic Inspection (PI).

After the First Special Inspection, your facility should be inspected periodically. The frequency at which this should be done depends on the input power of the genset. For gensets up to 100 kW thermal input power, this inspection must take place every four years. For larger generators, this inspection should take place every 2 years.

Using the report prepared after the initial special inspection, the inspector checks the aggregate. This looks at the safety features present, any modifications that have been made and whether the maintenance performed has demonstrable results. In addition, the inspector also checks the number of running hours. This involves checking whether the genset runs for more than 500 hours and whether the genset is used solely for emergency power or not. When the generator exceeds 500 operating hours or when it is used for purposes other than just emergency power, the SCIOS scope 6 inspection will be performed. The scope 6 inspection is a combustion test where one measures engine combustion, fuel consumption, temperature and CO2 emissions.

Another thing to know is that the SCIOS inspection institute has a nationwide system. This is where all tests and inspections are recorded. This allows environmental officials and regulators to see if you are in compliance. This generally results in a lower probability of additional checks.

Need SCIOS inspection? We are at your service!

At ABATO Motors, you have come to the right place for SCIOS inspections. Our experienced technicians are certified to inspect and test your generator. These tests and inspections can additionally be combined with maintenance on your generator should this be desired. Through our contact page you can contact us for questions, to set up a maintenance contract or to make an appointment. In addition, you can call +31 (0)88 2228600 or email to For a price estimate, you can also use our handy maintenance calculator.

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