The laboratory
Behind every MSL analyzer there are people, real premises in Osny and forty years of proof.
Exclusive specialist in veterinary analyzers since 1998.
Since 1986
Forty years giving the laboratory back to vets
In 1998, analysing an animal's blood still meant sending it away and waiting — for a result that often came after the decision had been made. MELET SCHLOESING Laboratoires, founded twelve years earlier in human biology, set out to close that gap: give the practitioner the means to run the analysis themselves, at the animal's side, without giving up any rigour.
The approach has not changed since. Our analyzers are designed from what veterinarians tell us about their day — a blood volume you simply do not have on a kitten, a result needed before the consultation ends, a machine that has to fit on an already crowded bench. The patents came from there, not from a specification written away from the field.
Three families came out of it: haematology, immunology, biochemistry. And a ten-year warranty no one else offers on this market — because an analyzer you replace every three years is not independence, it is a subscription.
1986
The founders
MELET SCHLOESING Laboratoires was founded by François MELET and Amélie SCHLOESING, with a philosophy: "better and cheaper".

Timeline
1986
Founding
François MELET and Amélie SCHLOESING found MELET SCHLOESING Laboratoires in Osny, for haematology in human medical biology.
1998
Into veterinary practice
The company brings its haematology to veterinarians. In-clinic analysis, with no sample sent away, becomes possible.
1990s–2000s
Hematology range
MS9 then MS4 equip French benches. Reputation built on robustness and nearby support.
2000s–2010s
Immuno & biochemistry expansion
Beyond hematology: immunology and biochemistry families developed to cover the full lab.
Today
Three families
MS4S2, ImMScan and iKeMS form the full in-clinic lab. ISO 13485, 10-year warranty, support 7 days/week.
Soon
MS3X
The new generation of haematology arrives in November, continuing forty years of expertise.
Our product history
The analyzers MSL has designed or distributed over the years. Each one fed the expertise of those that followed.
Hématologie
MS9
Multi-species hematology counter, long-standing reference in clinic and research.
Hématologie
MS4
Bench hematology, direct predecessor of the MS4S2 line.
Coagulation
CoagSan
A coagulation analyzer designed by MSL, part of our technical history.


1986. The founding
MELET SCHLOESING Laboratoires was founded in 1986 on haematology expertise, serving human medical biology. In 1998 the company brought that same standard to veterinary practice, on one conviction: the practitioner should be able to run the analysis in-house.
Today. Osny, France
Our teams design, distribute and support our analyzers at 9 Chaussée Jules César, Osny. ISO 13485 certification, 10-year warranty, 7/7 support in French. INSERM, research institutes and zoological parks work with our machines every day.
Tomorrow. The MS3X
The new generation of haematology arrives in November. It carries forty years of expertise into today's technology. The next chapter is written here.

They work with our analyzers
- INSERM institutes
- Research institutes
- Zoos
- ISO 13485
- 10-year warranty
- 8,500+ analyzers installed
- 4,200+ clinics equipped
