High-Performance Laboratory Equipment
LDR provides advanced laboratory solutions from KNF, the global leader in diaphragm pump technology. Our range of laboratory equipment is designed for intuitive handling, compact footprint, and absolute reliability, meeting the strict requirements of modern research and industrial laboratories.






















WHY CHOOSE KNF LAB TECHNOLOGY?
Intuitive Handling
Devices designed for ease of use in everyday laboratory challenges.
Compact Design
Space-saving solutions that preserve valuable bench space.
Smart Functions
Features like wireless control and digital customization.
Quiet & Reliable
Low noise operation with maintenance-free mechanisms.
Chemical Resistance
Premium materials (PTFE, FFKM) ensuring safe handling of aggressive media.
PRODUCT CATEGORIES
Liquid Dosing & Metering (SIMDOS®)
Precise, safe, and clean handling of neutral and corrosive liquids. SIMDOS® dosing pumps offer intuitive programmable controls for accurate liquid transfer.
- Models: SIMDOS® 02 and SIMDOS® 10
- Flow Rates: 0.03 – 100 ml/min
- Applications: Accurate dosing of chemicals, pharmaceutical synthesis, and nutrient supply.
Vacuum Pumps & Systems (LABOPORT®)
KNF LABOPORT® diaphragm vacuum pumps are the standard for oil-free, maintenance-free vacuum generation in the laboratory. They are chemically resistant and ideal for a wide range of applications including filtration, degassing, and gel drying.
- Key Series: N 820 G, N 840 G, N 920 G
- Features: High vapor tolerance, environmentally friendly (no water/oil waste), and exceptionally quiet.
- Systems: SC 920 G and SC 820 G vacuum pump systems with wireless remote control and automatic boiling point detection.
Liquid Transfer Pumps (LIQUIPORT®)
Designed for the safe transfer of neutral and aggressive liquids. These pumps are self-priming, dry-run safe, and maintenance-free.
- Models: LIQUIPORT® NF 100, NF 300, NF 1.100, NF 1.300
- Capabilities: Flow rates from 0.2 to 3 l/min with excellent chemical compatibility.
Rotary Evaporation
The New Rotary Evaporator RE 212 FW-G offers a user-friendly interface and a small footprint. It provides an easy-to-use, reliable, and environmentally compliant solution for distillation and separation tasks.
- Key Series: N 820 G, N 840 G, N 920 G
- Features: High vapor tolerance, environmentally friendly (no water/oil waste), and exceptionally quiet.
- Systems: SC 920 G and SC 820 G vacuum pump systems with wireless remote control and automatic boiling point detection.
KEY APPLICATIONS
Our KNF laboratory products are engineered to support a wide variety of critical lab processes:
Rotary Evaporation & Distillation
Efficient separation and purification of liquids.
Filtration
Ideal for flask filtration, vacuum blotting, and vacuum manifolds.
Degassing & Desiccation
Removing dissolved gases from liquids or moisture from solids.
Fluid Aspiration
Safe and regulated aspiration of supernatants and biological fluids.
Gel Drying
Consistent vacuum for perfect results in protein and DNA analysis.
Centrifugal Concentration
Rapid evaporation of solvents in vacuum concentrators.
Vacuum Ovens
Powerful vacuum generation for drying heat-sensitive samples.
Get a Technical Consultation
Not sure which pump or system fits your application? Our engineering team provides free consultation to match the perfect KNF solution to your laboratory needs.