Crimp neck and headspace vials ND20 with rounded or flat bottom made of clear and amber first hydrolytic class glass need to be able to withstand very high internal pressures and, as a result, their walls are generally 1.2 mm thick. The vials are available with a flat DIN crimp neck or with a bevelled neck (HS neck).

On the flat DIN crimp neck, liners have a greater contact surface, which ensures a better seal. A bevelled HS neck is required if the overpressure safety seal system patented by Perkin Elmer is used, since excess pressure can only be reliably dissipated in vials with an HS neck.

Short thread vials and micro-vials ND9 are available in clear and amber first hydrolytic class glass and can be used on almost all autosamplers. You can replace other 1.5 ml vial types like 11 mm crimp neck vials, 8-425 and 10-425 screw neck vials, which can help rationalize stocks.

The wide opening requires matching micro-inserts with 6 mm diameter.

Due to the technical geometry, the vails can be used on all common autosamplers, but preferentially on instruments made by Agilent, HTA, Shimadzu, Thermo Scientific, Varian and Waters.

Natural rubber (NR). To hold filter funnels or crucibles.

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.

Nickel-plated brass. With handles. Tube wall 0.4 mm.

The Dräger-Tubes^® measuring system is the safe method for measuring pollutants in the soil, water and air. More than 500 substances can be measured in varying concentrations. The long-established principle of Dräger-Tubes^® is still the same. A defined volume of gas/air must be pumped through the sampling tube. This can be achieved by using the Accuro^® gas pump. On contact with the substance under test the reagent system contained in the tube reacts and displays a colour. The strength of the concentration of the substance is shown by the length of the colour band displayed and can be read directly from the scale. The Dräger-Tubes^® sampling system provides accuracy, efficiency, quick and easy handling. Over 250 tubes are available on request for all substances and measuring fields. Further sampling devices, diffusion tubes for long-term measurements as well as sampling systems with activated carbon tubes, ORSA collector and TDS thermodesorption tubes are also available.

Ideal for fast, loss-free fine grinding of hard, medium-hard, brittle and fibrous materials - dry or in suspension in the areas of geology, mineralogy, metallurgy, ceramics, materials research, mechanical alloying, pharmaceuticals, chemistry, biology, sample preparation for analysis.
Sample can be processed from a few mg to several kg at a wide range of fineness levels down to less than 1 µm. They are especially easy to operate and fast and easy to clean. Suitable for continuous, heavy duty usage and guarantee safe clamping of the grinding bowls.
Matching grinding parts of 7 different materials are available to provide max.
protection against undesired contamination. In addition to size-reduction, planetary ball mills can also be used for mixing and homogenising of emulsions and pastes or for mechanical alloying and activation.

FRITSCH also offers a Planetary Mill Generation premium line, for fast high-tech grinding down to the nano range, worldwide unique in operation, performance and safety, a new reference class. Information on the Planetary Mill PULVERISETTE 5 premium line and Planetary Micro Mill PULVERISETTE 7 premium line can be found in the LLG Online Shop.

• Packing for distillation columns
• Chemically inert
• High surface area per unit of volume
• Minimum resistance to gas and liquid flow

For simple, manual measurement of concentrations and refractive indices of liquids. Hand-held, precision refractometers with focussing eyepiece, soft rubber eyecups (to reduce straylight ingress, also spectacle lenses do not slip off and are not scratched), case and conversion tables. Hand-held refractometers cannot be fitted with a thermostatic controller and so measurements have to be temperature compensated.

Models with extra code M: Basic model
Models with extra code T: with automatic temperature compensation (ATC)
Models with extra code α: with automatic temperature compensation (ATC) and protection class IP65
Models with extra code H: for hot samples, with prism made of tempered glass