Not every product needs a room-scale test to enter the classification system. ISO 11925-2 exposes a vertical specimen to a small flame for 15 or 30 seconds and watches whether flames spread 150 mm within the set time - the test behind Euroclass E and a screening gate for higher classes. The Motis single flame source apparatus (model SIT) performs surface and edge exposure exactly as the method sets out.
How the Single Flame Source Test (Ignitability) Apparatus works
The specimen is mounted vertically in the cabinet. A small burner, inclined as the method specifies, applies the flame to the surface or the bottom edge of the specimen for the set exposure time. Flame spread is timed against the 150 mm mark, and filter paper below records flaming droplets.
Key specifications
| Standards | ISO 11925-2, EN 13501-1, DIN 4102, DIN 5510-2, EN 45545-2 (application-dependent), GB/T 8626 |
|---|---|
| Exposure | Surface and edge flame application, 15 s or 30 s as the classification route requires |
| Measurement | Flame spread to the 150 mm mark within the observation time; flaming droplets on filter paper |
What the test reports
- Whether flame reaches the 150 mm mark within the specified time
- Ignition and flame spread behaviour
- Flaming droplets/particles observation
Applications
Building product laboratories use the SIT for Euroclass E testing and as the first screening step for products heading to SBI classification. It is also called up in railway material work under EN 45545-2.
Frequently asked questions
Which standard should I order against?
Order against the standard your reports must cite. The instrument platform is shared across the listed standards, but fixtures, software templates and calibration routines differ, so name the standard (and its year) in your inquiry and the configuration will be matched to it.
Can the instrument be installed in an existing laboratory?
Yes, in most cases. Tell us the available floor space, ceiling height, exhaust capacity and gas supplies in your inquiry; large systems such as the SBI and tunnel furnaces need a dedicated exhaust arrangement, which is confirmed in the layout proposal before ordering.
Is this test enough for a Euroclass?
It is the named test for class E, and a component of the evidence for higher classes, but classes A2 to D are decided mainly on SBI results. If you are planning a classification programme, describe the product and target class in your inquiry.
Configuration, installation and support
Every Single Flame Source Test (Ignitability) Apparatus is supplied as a configured system, not a bare instrument: the test chamber or frame, the burner or heater assemblies named in the method, the measurement chain and the control software with the report templates for ISO 11925-2, EN 13501-1, DIN 4102, GB/T 8626. Before quotation we confirm the installation conditions with you - floor loading and ceiling height for large rigs, exhaust and extraction routes, gas and fuel services, and power supply - because a fire test instrument only produces defensible data when the room around it is right. Commissioning covers assembly, calibration of the measurement chain against the method's own checks, and training of your operators on running the test and maintaining the apparatus. Spare ignition parts, thermocouples and other consumables for the first period of operation can be included in the supply, and the instrument is supported with calibration and maintenance services after installation.
What to include in your inquiry
To quote the Single Flame Source Test (Ignitability) Apparatus correctly the first time, send: the standard and edition you will test to (ISO 11925-2, EN 13501-1, DIN 4102, GB/T 8626); the materials or products you will test and their sizes; the configuration options you already know you need; and the destination laboratory's location and available services. If you are building a new fire laboratory rather than adding one instrument, say so - this apparatus is often planned together with the other instruments in its category, and a combined layout and exhaust plan is cheaper than three separate ones.