Centrifuge tubes are specially designed to be placed in centrifuges to separate liquids, cells or other particles based on their density. During centrifugation, the contents are broken down into their components through rapid rotation around the fixed axis. The centrifugal force pushes the heavier components of the substance downwards, while the lighter ones remain at the top. In this way, solids can be reliably separated from liquids as well as substances of different densities.
Filter
Filter
Taps
CHEMSOLUTE®
Zur bestmöglichen Nutzung von Kanistern bietet CHEMSOLUTE® praktische Auslaufhähne.
Auslaufgeschwindigkeit der Auslaufhähne: breiter Auslauss ca. 5 l/min, schmaler Auslass ca. 1,5 l/min
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Zur bestmöglichen Nutzung von Kanistern bietet CHEMSOLUTE® praktische Auslaufhähne.
Auslaufgeschwindigkeit der Auslaufhähne: breiter Auslauss ca. 5 l/min, schmaler Auslass ca. 1,5 l/min
Maximum safety for HPLC solvent supply. The integrated air valve (B) blocks hazardous vapours and cleans the inflowing air (M) from dust and dirt particles.
Protection against escaping solvent vapours
Solvents (L) und and mixtures remain clean and stable
No twisted tubing, easy container exchange
No air intake in to the HPLC system
Reproducible analytical results through stable mobile phase
Use the supplied blind plugs to tighten connections which are temporarily inactive or not in use
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Maximum safety for HPLC solvent supply. The integrated air valve (B) blocks hazardous vapours and cleans the inflowing air (M) from dust and dirt particles.
Protection against escaping solvent vapours
Solvents (L) und and mixtures remain clean and stable
No twisted tubing, easy container exchange
No air intake in to the HPLC system
Reproducible analytical results through stable mobile phase
Use the supplied blind plugs to tighten connections which are temporarily inactive or not in use
Air valve (B) with PTFE filter (G) and Luer-Lock adapter (A)
Valve membrane (H) optimized for analytical and preparative flow rates
Improved PFA fittings (C)
Body (D / I) made of medical grade PTFE, food safe, FDA conform
Screw cap (F) made of PPS, autoclavable / sterilisable up to 200 °C
PTFE and PPS with excellent chemical resistance and flammability classification V-0 (UL-94)
Insertion label (E) for individual inscription
Improved FKM seal (J) for stable fit on any bottle
Improved ergonomics and construction (K)
-Thread size UNF 1/4" 28G
Luer Lock adapter
PTFE Filter
Valve membrane blocks vapours and opens at negative pressure
It is recommended to replace the valve every 6 months
With change indicator and labelling field for timely change
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Exhaust Filter, PP
Bohlender
Lid with integrated ventilation openings and service life indicator. The filling of activated carbon is protected by two porous membranes made of PE. This allows an unobstructed flow of exhaust air, solvents are adsorbed by the activated carbon and only filtered air streams out....
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Lid with integrated ventilation openings and service life indicator. The filling of activated carbon is protected by two porous membranes made of PE. This allows an unobstructed flow of exhaust air, solvents are adsorbed by the activated carbon and only filtered air streams out.
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Stopcocks, with PTFE plug, borosilicate glass 3.3
Lenz
Acc. to DIN 12541-1 and in addition to DIN standard, with PTFE plug and screwthread retaining device, one straight bore, leakage rate acc. to DIN 12540-1....
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Acc. to DIN 12541-1 and in addition to DIN standard, with PTFE plug and screwthread retaining device, one straight bore, leakage rate acc. to DIN 12540-1.
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* with capillary side arms.
Air valves, PP
Bohlender
Red/yellow. With connecting thread UNF ¼" 28G. Filter membrane made of PTFE/PP with a porosity of 1 µm and integrated non-return valve made of silicone. With service life indicator....
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Red/yellow. With connecting thread UNF ¼" 28G. Filter membrane made of PTFE/PP with a porosity of 1 µm and integrated non-return valve made of silicone. With service life indicator.
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3-way stopcocks, T-bore, borosilicate glass 3.3
Lenz
Acc. to DIN 12554 and in addition to DIN standard
Leakage rate to DIN 12540-1
With solid glass plug or PTFE plug and screwthread retaining device
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Acc. to DIN 12554 and in addition to DIN standard
Leakage rate to DIN 12540-1
With solid glass plug or PTFE plug and screwthread retaining device
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* with rubber ring retaining device
b.safe WasteCaps, GL 45, PPS
Bohlender
Screw cap for thread GL 45 made of PPS, freely turnable distributor body made of PTFE with female threads: UNF ¼" 28 G for connecting capillary tubing (O. D. 1.6, 2.3 or 3.2 mm) or NPT 1/8" for a hose connector for flexible tubing with I.D. 6.4 or 9 mm, GL 14 for connecting a b.safe exhaust filter (not included)....
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Screw cap for thread GL 45 made of PPS, freely turnable distributor body made of PTFE with female threads: UNF ¼" 28 G for connecting capillary tubing (O. D. 1.6, 2.3 or 3.2 mm) or NPT 1/8" for a hose connector for flexible tubing with I.D. 6.4 or 9 mm, GL 14 for connecting a b.safe exhaust filter (not included).
For 250 µl RN needle syringes and larger. Port diameter 1.5 mm, Inert Gas Sampling Valve 1 mm....
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For 250 µl RN needle syringes and larger. Port diameter 1.5 mm, Inert Gas Sampling Valve 1 mm.
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Safety Caps V2.0, GL 45
SCAT
For the safe withdrawal of solvents. Screw caps, with freely movable insert made of PTFE, with PFA fittings for capillaries and an air valve. For maximum efficiency, we recommend that the vent is changed every 6 months.
Scope of suppy: Safety Cap, air valve, change indicator, PFA fittings, PFA blind plug, labelling field...
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For the safe withdrawal of solvents. Screw caps, with freely movable insert made of PTFE, with PFA fittings for capillaries and an air valve. For maximum efficiency, we recommend that the vent is changed every 6 months. Scope of suppy: Safety Cap, air valve, change indicator, PFA fittings, PFA blind plug, labelling field
Stopcocks, with glass plug, borosilicate glass 3.3
Lenz
Acc to DIN 12541-1 and in addition to DIN standard. With solid glass plug and retaining device. Straight bore. Leakage rate acc. to DIN 12540-1....
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Acc to DIN 12541-1 and in addition to DIN standard. With solid glass plug and retaining device. Straight bore. Leakage rate acc. to DIN 12540-1.
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* with rubber retaining device
Straight valves PRODURAN®
DWK
Straight valves with spindle (PTFE) and integrated fine thread enable very fine adjustment of the valve opening.
Media only come into contact with Duran® glass and PTFE
Unscrewing protection prevents absolute unscrewing of the valve pin
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Straight valves with spindle (PTFE) and integrated fine thread enable very fine adjustment of the valve opening.
Media only come into contact with Duran® glass and PTFE
Unscrewing protection prevents absolute unscrewing of the valve pin
Temperature resistant to
with safety device:
140°C
without safety device:
180°C
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Test gas in disposable bottles
Dräger Safety
According to ISO 9002.DOT39 and EN12205.
Control valve not included, please order separately....
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According to ISO 9002.DOT39 and EN12205. Control valve not included, please order separately.
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Test tubes, Soda Lime Glass
Scherf
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Three-way stopcocks acc. to Czako, borosilicate glass 3.3
Lenz
Three-way stopcocks (Czako) acc. to DIN 12563. Angled bore 120°, with solid glass or PTFE plug. Leakage rate to DIN 12540-1....
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Three-way stopcocks (Czako) acc. to DIN 12563. Angled bore 120°, with solid glass or PTFE plug. Leakage rate to DIN 12540-1.
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Stopcock Discofix®
B. Braun
2-way- or 3-way stopcock system for infusion therapy and monitoring, for all current pressure infusion systems.
Stopcock 180° or 360° turnable
Luer-Lock port
PVC and latex free
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2-way- or 3-way stopcock system for infusion therapy and monitoring, for all current pressure infusion systems.
Stopcock 180° or 360° turnable
Luer-Lock port
PVC and latex free
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Accessories for Diluters / Dispensers Microlab 500/600 series
Hamilton Bonaduz
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Accessories for Vacuum Controller VACUU·SELECT and Measuring instrument DCP 3000
VACUUBRAND
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Non-return valves, PP
Bürkle
With embossed directional arrow or printed in black.
Conical spouts
Resistant to compression max. 4 bar
Operating temperature 0 to 40 °C
With PP valve ball, on request also with ball made of stainless steel or PTFE
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With embossed directional arrow or printed in black.
Conical spouts
Resistant to compression max. 4 bar
Operating temperature 0 to 40 °C
With PP valve ball, on request also with ball made of stainless steel or PTFE
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Thread Adapters, PP
Bürkle
For Bürkle pumps and discharge stopcocks....
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For Bürkle pumps and discharge stopcocks.
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Thread Adapters LaboPlast® 3/4"
Bürkle
For StopCock spigots and ball valves....
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For StopCock spigots and ball valves.
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One-way stopcocks, PTFE
BRAND
Valve lever made of PP
With integrated hose nozzles
Good chemical resistance
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Valve lever made of PP
With integrated hose nozzles
Good chemical resistance
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In-line valves
VACUUBRAND
Butterfly design. Housing made of stainless steel with fluoroelastomer seal. Two Buna-N rings act as rotary shaft seals. Helium leak-tested. Leak rate 1 x 10
-6 mbar x l/s. Excellent throughput....
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Butterfly design. Housing made of stainless steel with fluoroelastomer seal. Two Buna-N rings act as rotary shaft seals. Helium leak-tested. Leak rate 1 x 10-6 mbar x l/s. Excellent throughput.
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Needle-valve stopcocks, DURAN® tubing
Lenz
Made of DURAN
® tubing. Smooth PTFE plug spindle, with retention device to avoid accidental dismantling. PP screw cap and retention device. Operating temperature -20°C to 150°C. Needle-valve stopcocks can be used for accurate dispensing and fit perfectly to glass apparatus....
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Made of DURAN® tubing. Smooth PTFE plug spindle, with retention device to avoid accidental dismantling. PP screw cap and retention device. Operating temperature -20°C to 150°C. Needle-valve stopcocks can be used for accurate dispensing and fit perfectly to glass apparatus.
In order to meet the variety of different requirements, we offer centrifuges in a wide range of formats, sizes and materials.
Application and quality
Centrifuge tubes are used wherever the components need to be split - for example, for blood samples to separate the plasma, to isolate proteins or DNA, to collect cell cultures
or microorganisms from cultures, for the concentration of particles from environmental samples... The range of applications is diverse.
The high demands placed on these analyses also mean that no compromises can be made when selecting the centrifuge tubes used.
At Th. Geyer, we therefore focus on the highest quality and maximum safety - even at maximum speeds and high centrifugal pressure.
The material
You can choose between plastic, glass and stainless steel for the raw materials used. While stainless steel usually plays a subordinate role, plastics such as polypropylene (PP), polyamide (PA), polyethylene (PE) or polycarbonate (PC) are the standard in laboratories and research environments.
Depending on the type of plastic, centrifuge tubes can withstand very low to very high temperatures.
They are stable against chemicals and can be translucent or opaque, depending on requirements.
Centrifuge tubes made of glass impress with their basic resistance to chemicals, acids, bases and organic solvents.
The glass variants score points with their reusability and above-average durability. If required, glass allows a high degree of transparency and offers relatively easy handling
If the material is subjected to high speeds during centrifugation, plastic is usually the better choice.
Th. Geyer offers centrifuge tubes in both variants.
The sizes
Th. Geyer meets the specific requirements for the dimensions and capacity of centrifuge tubes with a large selection of different sizes.
These can be up to 500 ml, while sizes such as 50 mL and 15 mL are available for smaller filling volumes. In the micro range, centrifuge tubes are between 1.5 mL and 0.2 mL, which are mainly used in laboratories.
Of course, we offer you a wide selection of all common formats.
The lid
During centrifugation, the lid of the centrifuge tube prevents liquid from leaking out. Traditionally, screw, push-in or plug-in lids are used for this purpose, which are easy to close.
Micro centrifuge tubes are usually fitted with a snap-on cap. For very large variants, threaded lids ensure leakage protection. You will find both models with and without lids in our range.
Depending on your choice, you can always order stoppers and the like separately.
The base
The different base variants also meet the respective requirements. The conical base with its slightly tapered shape allows for selective material collection, making separation and removal much easier
Sample recovery is particularly high. Alternatively, you can also choose between self-standing centrifuge tubes with a flat base or a rounded base.
Benefit from our portfolio of centrifuge tubes
Are you looking for centrifuge tubes for demanding applications? Th. Geyer offers a wide range of the highest quality. Functional, easy to handle and with an attractive price-performance ratio.
Please feel free to send us your enquiry or contact us directly in person. We look forward to hearing from you!