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.
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Test strips for water analysis
CHEMSOLUTE®
CHEMSOLUTE® test strips are ideal for determining water hardness and for the semi-quantitative detection of ions and acids.
Fast and reliable detection
Dip, compare - done
Certified quality
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CHEMSOLUTE® test strips are ideal for determining water hardness and for the semi-quantitative detection of ions and acids.
Fast and reliable detection
Dip, compare - done
Certified quality
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Nessler Tube, without spout, borosilicate 3.3
LLG
For use, for example, with the Nessleriser systems from Lovibond
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For use, for example, with the Nessleriser systems from Lovibond®.
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QUANTOFIX® test strips
MACHEREY-NAGEL
For semi-quantitative determinations....
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For semi-quantitative determinations.
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* Test strips with reagent ** Box with 60 test strips and reagent
*** CE-marked according to the directive for medical products 93/42/EWG.
Water hardness test strips, AQUADUR®
MACHEREY-NAGEL
For determining water hardness.
Colour change from green to red....
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For determining water hardness. Colour change from green to red.
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*single sealed **3 test each sealed
Test strips are also available as individually sealed test strips or as test cards.
Reagent Tablets for Photometers and Comparators Lovibond®
The Pooltester is designed for the simultaneous determination of the most popular water treatment agents and the pH value. Each pool tester contains tablets in foil for every 20 analyzes and a multilingual user manual....
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The Pooltester is designed for the simultaneous determination of the most popular water treatment agents and the pH value. Each pool tester contains tablets in foil for every 20 analyzes and a multilingual user manual.
Accessories for Microbiological Air Sampling System MBASS30
Holbach
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Accessories for visual Colorimeter, Lovibond® Tintometer Model F
Tintometer
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Cells W600
Tintometer
Cells made of optical glass or Borosilicate glass 3.3, 21 mm x 40 mm, for instument Models Fs, PFXi/PFX195, 880, 950 and 995. (Note: PFXi/PFX-195 max. path length 50 mm).
W600/OG/xx for unheated samples (up to 40 °C)
W600/B/xx for heated samples (up to max. 100 °C)
Further versions available on request....
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Cells made of optical glass or Borosilicate glass 3.3, 21 mm x 40 mm, for instument Models Fs, PFXi/PFX195, 880, 950 and 995. (Note: PFXi/PFX-195 max. path length 50 mm).
W600/OG/xx for unheated samples (up to 40 °C) W600/B/xx for heated samples (up to max. 100 °C)
Further versions available on request.
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Colorimeters, Lovibond® PFXi series
Tintometer
The PFXi series of spectrophotometric colorimeters introduces a unique concept in liquid colour control: RCMSi technology (Remote Calibration & Maintenance Service via internet). Users can benefit from the capability for remote calibration and servicing via the internet - eliminating any costs and time delays associated with servicing and guaranteeing compliance with standards. The PFXi range is supplied with a full range of colour scales for specific markets including, but not limited to, Petroleum, Edible Oils, Pharmaceuticals, Brewing and Honey. Users can upgrade scales remotely at any time. Every PFXi is supplied with colour control software for data analysis (LAN & USB cable provided). Optical glass cells, a certified glass calibration filter, a spare lamp and user instructions included. The PFXi-880 and -995 series are available with an optional integrated heater unit. (This is not available for the PFXi-195). This is a critical feature when dealing with materials such as fats and waxes where temperature needs to be maintained at a constant temperature +10°C above the "Cloud Point" of the material....
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The PFXi series of spectrophotometric colorimeters introduces a unique concept in liquid colour control: RCMSi technology (Remote Calibration & Maintenance Service via internet). Users can benefit from the capability for remote calibration and servicing via the internet - eliminating any costs and time delays associated with servicing and guaranteeing compliance with standards. The PFXi range is supplied with a full range of colour scales for specific markets including, but not limited to, Petroleum, Edible Oils, Pharmaceuticals, Brewing and Honey. Users can upgrade scales remotely at any time. Every PFXi is supplied with colour control software for data analysis (LAN & USB cable provided). Optical glass cells, a certified glass calibration filter, a spare lamp and user instructions included. The PFXi-880 and -995 series are available with an optional integrated heater unit. (This is not available for the PFXi-195). This is a critical feature when dealing with materials such as fats and waxes where temperature needs to be maintained at a constant temperature +10°C above the "Cloud Point" of the material. Please Note: CIE values and spectral data readings are standard on all the instruments listed below.
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Colour test discs for Comparator system 2000
Tintometer
A large selection of water test discs are available for colorimetric chemical analyses and colour classification. Each test disc is equipped with fade-free, non porous glass filters, the quality of which is not impaired by UV light or other environmental influences.
Test discs whose code begins with "N", are designed for use in the Nessleriser 2150. Test discs which start with the letter "C" are designed for use in the Nessleriser 2250. All other test discs are designed for use in the comparator 2000+ . The most popular water test discs feature in the table below. Other test discs are available on request....
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A large selection of water test discs are available for colorimetric chemical analyses and colour classification. Each test disc is equipped with fade-free, non porous glass filters, the quality of which is not impaired by UV light or other environmental influences.
Test discs whose code begins with "N", are designed for use in the Nessleriser 2150. Test discs which start with the letter "C" are designed for use in the Nessleriser 2250. All other test discs are designed for use in the comparator 2000+ . The most popular water test discs feature in the table below. Other test discs are available on request.
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Comparators 2000/3000 series
AQUALYTIC
Two-Field and Three-Field Comparator View and nummerical results. The EComparator series offers the progress from Visual (subjective) to Electronic (objective) results.
With the EComparator series, viewers can view the colour difference with on-screen colour and on-screen numerical display. Touch screen technology makes the EComparator easily programmable with instinctive menus on screen. Users can set language, date and time, view preferences and create projects with individual tolerance settings "within tolerance" (green), "outside tolerance" (red) and "on border of tolerance" (amber) to provide the user with immediate information on the sample....
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Two-Field and Three-Field Comparator View and nummerical results. The EComparator series offers the progress from Visual (subjective) to Electronic (objective) results. With the EComparator series, viewers can view the colour difference with on-screen colour and on-screen numerical display. Touch screen technology makes the EComparator easily programmable with instinctive menus on screen. Users can set language, date and time, view preferences and create projects with individual tolerance settings "within tolerance" (green), "outside tolerance" (red) and "on border of tolerance" (amber) to provide the user with immediate information on the sample.
Instant and accurate, ready for immediate use
Guaranteed agreement with international standards
Results shown on display optional as colour or numeric value
Digital, mobile technology at the press of a button
Instant reporting from the laboratory or on site
The EC 2000 range provides users with a Two Field View visual representation in alignment with the popular Lovibond® Comparator 2000+ system widely used today.
The EC 3000 range provides users with a Three Field View visual representation in alignment with the popular Lovibond® Comparator 3000 / AF comparators. Here the sample and two consecutive readings of the colour scale are viewed simultaneously, making it easier to achieve the optimum colour match.
EC 2000 PT CO: Platinum-Cobalt/Hazen/Apha Colour (ASTM D 1209)/True Colour Units (TCU). Water, clear oils, chemicals and petrochemicals. Incl. cells (3 x 50 mm W100 plastic) and (1 x 50 mm W100 OG)
EC 2000 GARDNER COLOUR: ASTM D 1544, ASTM D 6166, AOCS Td 1a, MS 817 Part 10. Resins, varnishes, lacquers, drying oils, fatty acids, lecithins, sunflower oil, linseed oil. Incl. cells (3 x 10 mm W100 plastic) and (1 x 10 mm W100 OG)
EC 3000 ASTM COLOR: ASTM D 1500, ASTM D 6045, ISO 2049, IP196. For mineral oils and petrochemicals. Incl. cells (2 x 33 mm W100 plastic) and (2 x 33 mm W100 OG)
EC 3000 SAYBOLT COLOUR: ASTM D 156, ASTM D6045. Aviation fuels, kerosene, naphthas, white mineral oils, hydrocarbon solvents, petroleum waxes. Incl. cells (2 x 50 mm W100 plastic) and (2 x 50 mm W100 OG)
Scope of supply: Liquid reference standards and 1 glass standard included for EC 2000 and 2 glass standards included for EC 3000.
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Color Standards Platinum-Cobalt (Hazen)
Reagecon
These color standards can be used to calibrate, control, qualify or validate color measurement instruments to determine the color number. These standards can be described as Platinum-Cobalt, Pt-Co, Hazen or APHA color. All descriptions are interchangeable.
Covers requirements of ASTM Method D 1209
In 1 l HDPE bottle
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These color standards can be used to calibrate, control, qualify or validate color measurement instruments to determine the color number. These standards can be described as Platinum-Cobalt, Pt-Co, Hazen or APHA color. All descriptions are interchangeable.
Covers requirements of ASTM Method D 1209
In 1 l HDPE bottle
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Lovibond® Comparator 2000+
Tintometer
Lovibond
® Comparator 2000+ is a quality instrument for the visual analysis of colour intensity in analysis samples using Lovibond colour discs. The integral cell attachment enables cells with a depth of 40mm to be accepted. The Lovibond
® Nessleriser system provides greater depths by using corresponding accessory Nessler tubes. This enables the determination of concentrations below the detection limit of the Lovibond...
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Lovibond® Comparator 2000+ is a quality instrument for the visual analysis of colour intensity in analysis samples using Lovibond colour discs. The integral cell attachment enables cells with a depth of 40mm to be accepted. The Lovibond® Nessleriser system provides greater depths by using corresponding accessory Nessler tubes. This enables the determination of concentrations below the detection limit of the Lovibond® Comparator 2000+. The integral prism in the Lovibond® Comparator 2000+ brings the glass standard of the colour discs and the colour samples optically into the field of view. The prism is hermetically sealed, preventing the lens from being contaminated. Both the Comparator 2000+ and the Nessleriser are designed in such a way that they compensate for cloudy or coloured water samples. Each device is available for use in daylight or in combination with the artificial daylight unit 2000.
Visual comparators for colour grading. A series of 3-field instruments designed for visual colour grading by direct comparison between the sample and coloured glass standards. The sample and two adjacent glasses on the colour scale are viewed simultaneously, making it easier to achieve the optimum colour match. The tungsten halogen light source is colour corrected to CIE Standard Illuminant C (B for the EBC Comparator 3000) and guarantees constant lighting conditions for colour grading. Versions of the Comparator 3000 are available for the following scales, each supplied with the appropriate range of colour standards and sample containers:...
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Visual comparators for colour grading. A series of 3-field instruments designed for visual colour grading by direct comparison between the sample and coloured glass standards. The sample and two adjacent glasses on the colour scale are viewed simultaneously, making it easier to achieve the optimum colour match. The tungsten halogen light source is colour corrected to CIE Standard Illuminant C (B for the EBC Comparator 3000) and guarantees constant lighting conditions for colour grading. Versions of the Comparator 3000 are available for the following scales, each supplied with the appropriate range of colour standards and sample containers:
Type
Typical Applications
Gardner Comparator 3000:
Chemicals and oils including resins, varnishes, drying oils and fatty acids (ASTM D1544; ISO 4630, AOCS Methods Ja 9-87, Td 1a-64, Td 3a-64).
Petroleum Oils Comparator (AF 650):
Petroleum oils and fuels (ASTM D1500; IP 196; DIN 51 578; ISO 2049; BS 5859)
EBC Comparator 3000:
Beers, malt worts, caramels and similarly coloured liquids (Analytica)
Lovibond
® Comparator 2000+ is a quality instrument for the visual analysis of colour intensity in analysis samples using Lovibond colour discs. The integral cell attachment enables cells with a depth of 40mm to be accepted. The Lovibond
® Nessleriser system provides greater depths by using corresponding accessory Nessler tubes. This enables the determination of concentrations below the detection limit of the Lovibond...
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Lovibond® Comparator 2000+ is a quality instrument for the visual analysis of colour intensity in analysis samples using Lovibond colour discs. The integral cell attachment enables cells with a depth of 40mm to be accepted. The Lovibond® Nessleriser system provides greater depths by using corresponding accessory Nessler tubes. This enables the determination of concentrations below the detection limit of the Lovibond® Comparator 2000+. The integral prism in the Lovibond® Comparator 2000+ brings the glass standard of the colour discs and the colour samples optically into the field of view. The prism is hermetically sealed, preventing the lens from being contaminated. Both the Comparator 2000+ and the Nessleriser are designed in such a way that they compensate for cloudy or coloured water samples. Each device is available for use in daylight or in combination with the artificial daylight unit 2000.
Model
Apparatus included
AF 325:
Nessleriser 2150 with Daylight 2000 Lighting Unit and 113 mm (50ml) Nessler cylinders, Pt-Co discs NSH (10 to 90mg Pt/l), NSB (70 to 250mg Pt/l), stand for using Nessleriser with natural light.
AF 328:
Nessleriser 2250 with Daylight 2000 Lighting Unit and 250mm Nessler cylinders, Pt-Co discs CAA (0 to 30mg Pt/l), CAB (30 to 70mg Pt/l), stand for using Nessleriser with natural light.
AF 329:
Nessleriser 2150 with Daylight 2000 Lighting Unit and 113mm (50ml) Nessler cylinders, Nessleriser 2250 upgrade with 250mm Nessler cylinders, Pt-Co discs CAA (0 to 30mg Pt/l) CAB (30 to 70mg Pt/l), NSB (70 to 250mg Pt/l), stand for using Nessleriser with natural light.
AF 330:
Comparator 2000+ with Daylight 2000 Lighting Unit (EBC Version), EBC discs (4/14A, 2 - 6; 4/14B, 6 - 10; 4/14C, 10 - 18; 4/14D, 19 - 27), 2 x W680/OG/25 mm fused cells
AF 334:
Comparator 2000+ with Daylight 2000 Lighting Unit, Gardner discs (4/30 AS, 1 - 9; 4/30 BS, 10 - 18), 2 x W680/OG/10 mm fused cells
Single-parameter and multi-parameters kits, including for chlorine and pH The Lovibond
® product range contains a large selection of single and multi-parameter water testing equipment. Each kit is a complete, portable system that guarantees accurate water tests and contains all of the colour discs, reagents, accessory parts and detailed instructions necessary for the respective tests ensuring that reliable results may be obtained. The table below illustrates the most popular water testing kits. In addition, kits can also be created in accordance with specific user requirements on request....
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Single-parameter and multi-parameters kits, including for chlorine and pH The Lovibond® product range contains a large selection of single and multi-parameter water testing equipment. Each kit is a complete, portable system that guarantees accurate water tests and contains all of the colour discs, reagents, accessory parts and detailed instructions necessary for the respective tests ensuring that reliable results may be obtained. The table below illustrates the most popular water testing kits. In addition, kits can also be created in accordance with specific user requirements on request.
All test apparatus for parameters listed against individual kits are supplied.
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Nessler tubes for Lovibond® Comparator System 2000
Tintometer
Nessler cylinder AF306P, 113 mm: For use with the Nessleriser 2150 for the measurement of the Pt-Co/Hazen colour discs NSH (10-90 mg Pt/l) and NSB (70-250 mg Pt/l) and NSX (50-300 mg Pt/l).
Nessler cylinder DB420, 250 mm: For use with the Nessleriser 2250 for the measurement of the Pt-Co/Hazen colour discs CAA (0-30 mg Pt/l) and CAB (30-70 mg Pt/l)....
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Nessler cylinder AF306P, 113 mm: For use with the Nessleriser 2150 for the measurement of the Pt-Co/Hazen colour discs NSH (10-90 mg Pt/l) and NSB (70-250 mg Pt/l) and NSX (50-300 mg Pt/l). Nessler cylinder DB420, 250 mm: For use with the Nessleriser 2250 for the measurement of the Pt-Co/Hazen colour discs CAA (0-30 mg Pt/l) and CAB (30-70 mg Pt/l).
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Cells W680
Tintometer
Cells made of optical glass 17 mm x 75 mm, for Comparator 2000+ and Comparator 3000 using unheated samples (up to 40 °C).
Further versions available on request....
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Cells made of optical glass 17 mm x 75 mm, for Comparator 2000+ and Comparator 3000 using unheated samples (up to 40 °C).
Further versions available on request.
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Photometers MD 200
AQUALYTIC
Benchtop devices suitable for mobile use. For precise water control through high-precision optics and high-quality interference filters with long-term stable LEDs as light sources.
Automatic shutdown
Real time clock and date
Adjustment function display
Illuminated LCD-display
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Benchtop devices suitable for mobile use. For precise water control through high-precision optics and high-quality interference filters with long-term stable LEDs as light sources.
Automatic shutdown
Real time clock and date
Adjustment function display
Illuminated LCD-display
Further photometer versions available on request.
Specifications
Measurement cycle:
approx. 3 seconds (method dependent)
Optics:
Temperature compensated LED and photosensor intensifier in a waterproof sample chamber
Keyboard:
4-key polycarbonate film, splashproof
Dimensions (W x D x H):
110 x 190 x 55 mm
Weight:
455 g
Power supply:
4 x AA
IP code:
IP 68
Alternative
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Photometers MD 200
Tintometer
Benchtop devices suitable for mobile use. For precise water control through high-precision optics and high-quality interference filters with long-term stable LEDs as light sources.
Automatic shutdown
Real time clock and date
Adjustment function display
Illuminated LCD-display
...
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Benchtop devices suitable for mobile use. For precise water control through high-precision optics and high-quality interference filters with long-term stable LEDs as light sources.
Automatic shutdown
Real time clock and date
Adjustment function display
Illuminated LCD-display
Further photometer versions available on request.
Specifications
Measurement cycle:
approx. 3 seconds (method dependent)
Optics:
Temperature compensated LED and photosensor intensifier in a waterproof sample chamber
Keyboard:
4-key polycarbonate film, splashproof
Dimensions (W x D x H):
110 x 190 x 55 mm
Weight:
455 g
Power supply:
4 x AA
IP code:
IP 68
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Reagent tablets for Nessleriser 2150 / 2250
Tintometer
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Visual Colorimeter, Lovibond® Tintometer Model F
Tintometer
Individually housed glass colour standards
Prismatic optical system for accurate and repeatable colour matching
Standardised and diffused tungsten-halogen light source
Replacement inserts simplify cleaning and maintain interior whiteness
The Model F is a versatile visual colorimeter for measuring the colour of liquids, solids, powders and pastes in terms of Lovibond units. The user simultaneously compares the colour of light that is either transmitted through or reflected from the sample with that transmitted through a series of glass colour filters in 3 primary colours - red, blue and yellow. The slides are adjusted until a visual colour match is found for the light from the sample and the colour is then expressed in Lovibond RYBN units....
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Individually housed glass colour standards
Prismatic optical system for accurate and repeatable colour matching
Standardised and diffused tungsten-halogen light source
Replacement inserts simplify cleaning and maintain interior whiteness
The Model F is a versatile visual colorimeter for measuring the colour of liquids, solids, powders and pastes in terms of Lovibond units. The user simultaneously compares the colour of light that is either transmitted through or reflected from the sample with that transmitted through a series of glass colour filters in 3 primary colours - red, blue and yellow. The slides are adjusted until a visual colour match is found for the light from the sample and the colour is then expressed in Lovibond RYBN units.
The Model F is supplied with a complete set of Lovibond coloured glass filters (Red 0.1 to 70; Yellow 0.1 to 70; Blue 0.1 to 40; Neutral 0.1 to 3.0), a sample chamber insert for easy cleaning, fused glass cells (one each of 1" and 5¼"), accessories and instructions. An optional solid sample accessory pack is available for measuring light-reflecting products. Includes a 12 Volt a.c. power pack switchable to suit 110/220/Volt supply.
Each instrument is supplied with optical cuvettes of the appropriate path length for the individual colour scales, calibration filter, spare lamp and operating instructions.
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!