Centrifugation Tubes

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
...

 Nessler Tube, without spout, borosilicate 3.3

LLG

For use, for example, with the Nessleriser systems from Lovibond ®....

 Water hardness test strips, AQUADUR®

MACHEREY-NAGEL

For determining water hardness.
Colour change from green to red....

 QUANTOFIX® test strips

MACHEREY-NAGEL

For semi-quantitative determinations....

 Reagent Tablets for Photometers and Comparators Lovibond®

Tintometer

...

 Qualitative Test papers

MACHEREY-NAGEL

Cyantesmo: Roll of 5 m length and 10 mm width...

 Rapid Tests, Pooltester

Tintometer

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....

 MERCKOQUANT® test strips

Merck

Other tests on request....

 Accessories for Microbiological Air Sampling System MBASS30

Holbach

...

 Accessories for visual Colorimeter, Lovibond® Tintometer Model F

Tintometer

...

 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....

 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....

 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....

 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....

 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
...

 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...

 Lovibond® Comparator 3000

Tintometer

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:...

 Lovibond® Nessleriser Systems, Pt-Co/Hazen/APHA Scale

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...

 Lovibond® water testing equipment

Tintometer
GHS05 GHS08

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....

 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)....

 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....

 Photometers MD 200

AQUALYTIC
GHS02 GHS05 GHS07

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
...

 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
...

 Reagent tablets for Nessleriser 2150 / 2250

Tintometer

...

 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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Centrifuge tubes as a customised solution

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!