Description
MESSKO MFI100-O
Reliable oil circulation monitoring for transformer cooling systems, helping protect valuable electrical equipment from cooling failures.
| Brand | MESSKO |
| Model | MFI100-O |
| Voltage | 24-240 V AC/DC |
| Country of Origin | Germany |
| Weight | Approximately 2.0 kg |
| Dimensions | Approximately 220 x 110 x 100 mm |
| Warranty | 6 months |
| Certifications | CE |
| SKU / MPN | MFI100-O |
| What’s in the box | MESSKO MFI100-O oil flow relay, mounting hardware, installation documentation |
| Product Type | Oil flow relay |
| Primary Function | Monitors transformer oil circulation and provides an alarm or trip signal |
| Application | Forced oil-cooled power transformers |
| Switching Output | Potential-free changeover contact |
| Installation | Installed in transformer cooling oil piping |
| Construction | Industrial housing with visual flow indication |
Key benefits: Early detection of reduced or interrupted oil flow, dependable alarm signaling, robust industrial construction, straightforward installation, and improved transformer protection.
Typical applications: Power transformer cooling systems, distribution substations, industrial substations, transformer oil circulation circuits, and cooling pump monitoring.
Lifecycle: Active industrial product with service life dependent on operating conditions and maintenance.
Our Advantages
Exact match for many brands
We make replacements easy with an exact match for almost any brand.
We use OEM catalogs to match your part number
Don't worry about ordering the wrong part by matching your part number with our OEM catalogs.
Competitively priced
Shop with confidence knowing we are offering very competitive pricing!
Orders usually ship the same day
Rest assured your order will arrive as soon as possible knowing we usually ship the same day.
Individually inspected
Before any package is shipped we carefully inspect every product to ensure quality.
Guaranteed for one full year
All of our New Surplus and Reconditioned products come with a 1 year warranty.
Run Business
Building a reputation for quality products at a reasonable price. Our inventory is far more extensive than what can be represented on our web site, so please call one of our knowledgeable salesmen with your specific needs.








Thomas K. –
Good quality sensor, accurate readings. Will order more for our production line.