
Custom laboratory glass reactors, filtration systems and components made of borosilicate glass 3.3 for chemistry, pharma and research.
HWS Hans W. Schmidt GmbH & Co. KG
MainzNew on Amplifa
About HWS Labortechnik
HWS Labortechnik from Mainz manufactures custom reactor and filtration systems made of borosilicate glass 3.3 for laboratory and pilot plant applications. The portfolio includes jacketed glass reactors, filter funnels (Büchner funnels), reactor components such as bottom drain valves, stirrer seals, stirrers, adapters and clamps, as well as electronic laboratory systems for temperature and reflux control with corresponding monitoring devices. In addition, the company supplies complete mini-plants for laboratory and pilot applications and adapts systems to existing installations or carries out subsequent modifications. Production takes place in the company's own workshop by qualified specialists using Schott-brand borosilicate glass from Mainz; metal and plastic are also processed. Customers include chemical and pharmaceutical corporations as well as research laboratories worldwide. The company was founded in 1941 as a glass workshop.
- Site
- Mainz
- Processes
- Manufacture of laboratory glass reactors (jacketed glass reactors), Manufacture of filtration systems (filter funnels/Büchner funnels), Manufacture of reactor components (drain valves, stirrer seals, stirrers, adapters, clamps), Complete mini-plants for laboratory and pilot applications (turnkey), Electronic laboratory systems (temperature/reflux controllers, monitoring devices), Custom reactor and filtration systems made of borosilicate glass 3.3, Reactor components (bottom drain valves, stirrer seals, stirrers, adapters, clamps), Electronic laboratory systems (temperature and reflux controllers, monitoring devices)
- Materials
- Borosilicate glass 3.3 (Schott, Mainz), Metal, Plastic, Borosilicate glass 3.3 (Schott)
- Certificates
- Consistent quality assurance system
- Founded
- 1941
- Industries
- Chemicals, Pharmaceuticals, Research laboratories, Laboratory and pilot plants
- 01
Design and engineering according to customer requirements
- 02
Glassworking in borosilicate glass 3.3
- 03
Manufacture of reactor components from glass, metal and plastic
- 04
Electronic control and monitoring systems
- 05
Assembly of systems and mini-plants
- 06
Quality assurance
Materials and Processes
Borosilicate glass 3.3 (Schott)
High-quality raw glass from Mainz with high chemical and thermal resistance and transparency for reactors and filtration systems.
Metal
Material for reactor components such as valves, adapters, clamps and electronic laboratory systems.
Plastic
Used for components and system parts, including stirrer seals and laboratory systems.
Locations

Mainz
DEHeadquarters and manufacturing
- Materials
- Borosilicate glass 3.3, metal, plastic
Products




Inside the production


Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Manufacture of laboratory glass reactors (jacketed glass reactors)Casting | – | – | – | – | Borosilicate glass 3.3 |
| Manufacture of filtration systems (filter funnels/Büchner funnels)Casting | – | – | – | – | Borosilicate glass 3.3 |
| Manufacture of reactor components (drain valves, stirrer seals, stirrers, adapters, clamps)Assembly | – | – | – | – | Borosilicate glass 3.3, Metal, Plastic |
| Complete mini-plants for laboratory and pilot applications (turnkey)Assembly | – | – | – | – | Borosilicate glass 3.3 |
| Electronic laboratory systems (temperature/reflux controllers, monitoring devices)Engineering | – | – | – | – | Metal, Plastic |
Additional services
Quality
Quality is ensured by first-class raw materials such as borosilicate glass from Schott (Mainz), experienced specialists in the workshop, and a consistent quality assurance system.
| Evidence | Mainz |
|---|---|
| Consistent quality assurance system |
History
- 1941
Founded as a glass workshop for household items such as flower vases and glass jewelry; the foundation for the later precision glass manufacturing.