Is the Varispenser resistant to morpholine (tetrahydro-1,4-oxazine)?

Yes. Due to the hygroscopic properties of morpholine, please use the drying tube (4960 851.00). The drying tube should be filled with dried calcium carbonate.

Is it possible to dispense crude oil using Varispenser?

The Varispenser is chemically resistant to crude oil. Difficulties may be caused by the viscosity, depending on the composition and temperature of the crude oil. The Varispenser is intended for dispensing liquids with a maximum kinematic viscosity of 500 mm2/s . It is thus necessary to work extremely slowly, and more effort is required on the part of the user. Furthermore blockage of the Varispenser hoses and valves is observed very fast, thus an immediate cleaning is necessary.

Can the Varispenser be used to dispense methyl butyl ether?

Yes, the Varispenser can be used for this. Methyl butyl ether is highly flammable! Warning: follow safety information!

Can the Varispenser be used to dispense dibutylamine?

Dibutylamine is very similar to ammonia. The Varispenser is resistant to dibutylamine.

Can 0.1 n butylamine and ethyl acetate be used in the Varispenser?

Both 0,1 N butylamine and ethyl acetate were tested and can be used.

During the dispensing process, does the liquid come into contact with any metal components of the Varispenser?

Yes. The spring system of the spring-loaded platinum-iridium valve ball comes into contact with the liquid during dispensing.

I would like to distribute liquid agar onto petri dishes with the Varispenser. How hot can the agar be for this?

Varispensers are measurement devices for which the guaranteed accuracy, precision or error limits only apply in a restricted temperature range of 15 - 40 °C (conforming to DIN 12650). Applications with liquids outside this temperature range are not recoommended and can only be carried out at the user's own risk. At higher temperatures up to 60 °C the plastic materials fluorocarbon and polypropylene will be fully chemically resistant, but mechanically they will become slightly softer. When hot agar is aspirated out of the bottle, cooling will take place in the cold Varispenser. Since agar becomes much firmer at ca. 35 °C, blockage can easily occur. In any case immediate cleaning will be required, in particular of the valve.

Is it possible to use the Varispenser to dispense agarose gels at approx. 90 °C?

Varispensers are measurement devices for which the guaranteed accuracy, precision or error limits only apply in a restricted temperature range of 15 - 40 °C (conforming to DIN 12650). Heating the device to 90°C is not permitted and can only be carried out at the user's own risk.

Is it possible to autoclave the Varispenser attached to a full flask?

Yes, this is possible. Please mind the following precautions: The Varispenser is loosely screwed on the bottle, the volume setting knob is set to 20% of the nominal volume and the piston is completely pulled out.

Is it possible to autoclave the Varispenser 2(x) attached to a bottle?

No, it is not possible to autoclave the Varispenser 2/x attached to a bottle. The device must be placed horizontal on a cloth in the autoclave (according to operating manual chapter 5.9).

Is it possible to exchange the dispensing tube of the Varispenser 2 and 2x among each other?

Yes, it is possible to exchange the dispensing tube of the Varispenser 2 with a dispensing tube of the Varispenser 2x. Please note that the device is then capable of recirculating the liquid back into the bottle.

Do aspiration tubes of different lengths exist for Varispenser 2(x)?

Yes, aspiration tubes of different lengths are available to cover most bottle types.

Does the aspiration tube of the Varispenser 2(x) need to be cut diagonal for aspiration?

No, the aspiration tube of Varispenser 2(x) does not need to be cut diagonal, because two holes on the bottom side of the tube enable liquid uptake.

What is the "flexible discharge tube" used for?

The "flexible discharge tube" can be used to reach into small or narrow-standing tubes without tilting the botlle. More Information are available in the White Paper 38 .

For which liquids a drying tube is beneficial?

The drying tube should be used when working with fuming acids to avoid dilution. It can tehn be filled with e.g., calcium chloride or silica pills. When working with alkaline solutions filling of the drying tube with sodium hydroxide pills prevents carbonate formation and crystallization of the liquid. More Information are available in the White Paper 38 .

Is it possible to dispense sterile medium with the Varispenser 2(x)?

Yes, it is possible to dispense sterile medium with the Varispenser 2(x). We recommend the usage of a sterile filter at the back of the device to keep the sterility of the medium. More Information are available in the White Paper 38 .

Is it possible to adjust the Varispenser 2(x)?

Yes, it is possible to adjust the Varispenser 2(x) for liquids with different properties than water. Please refer to the operating manual for further information.

How can the Varispenser 2(x) be decontaminated?

The outer of the Varispenser 2/x can be wiped with lint-free tissue and 70 % ethanol. When sterilization of the inner parts is needed, the Varispenser 2/x can be autoclaved. The dispenser does not need to be dissembled for autoclaving, but it must be placed horizontal on a cloth in the autoclave (according to operating manual chapter 5.9).

Is the Varispenser 2/2x suited for dispensing 100% acetic acid (glacial acetic acid)?

Yes. 100% acetic acid can be dispensed with the Varispenser 2/2x. When using concentrated acids the usage of a drying tube is furthermore highly recommended. More information about the chemical resistance of the Varispenser 2/2x is available here .

Can the Varispenser 2/2x be used to dispense a conc. sulfuric acid which contains potassium bichromate and silver sulfate?

Yes, you can use the Varispenser 2/2x for this application. Please notice, when using concentrated acids a drying tube should be connected to the Varispenser. More information about the chemical resistance of the Varispenser 2/2x is available here .

Which physical limits does the Varispenser 2/2x has?

The device is intended for dispensing liquids with following properties: ambient temperature 15°C - 40°C , maximum density: 2.2 g/cm3, maximum vapor pressure: 500 mbar. Above 300 mbar slow aspiration is recommended to avoid boiling., kinematic viscosity: 500 mm2/s. More details are written in the operating manual .

I bought a new Varispenser 2(x) and drops are visible inside the device. Additionally an intense smell was present when opening the cardbox. What is that?

Each Varispenser 2(x) is calibrated before packaging using distilled water. Afterwards each device is rinsed with an ethanol-glycerol solution to dry faster. The drops inside the device and the smell occur from this solution. The device should be completely dry after a few minutes outside the packaging.

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Varispenser^® 2/ Varispenser^® 2x - distributeur sur flacon

The Varispenser 2(x) from Eppendorf is available in six different volume sizes

Eppendorf Varispenser® 2 and Varispenser® 2x bottle-top dispensers – six different sizes for dispensing volumes from 0.2 – 100 mL

Lab technician using the Eppendorf Varispenser® 2x bottle-top dispenser

Easily fill Conical Tubes with the Varispenser® 2(x) bottle-top dispenser from Eppendorf

Lab technician using the Eppendorf Varispenser® 2x bottle-top dispenser to fill a glass vial

The Varispenser® 2x bottle-top dispenser's recirculation valve lever

The Varispenser® 2(x) bottle-top dispensers feature an easy-to-read volume scale

Varispenser® 2/2x bottle-top dispenser ventilation screw with filter

Varispenser® 2 bottle-top dispensers from Eppendorf are resistant to many chemicals and autoclavable

Varispenser® 2x bottle-top dispensers with the Eppendorf Top Buret

Varispenser® 2 and 2x bottle-top dispensers from Eppendorf fit on a variety of supply bottles and are chemical-resistant

Informations produit

Vous avez besoin de distributeurs sur flacon pour vos solutions corrosives telles que les acides, les solvants ou les bases ? Les distributeurs sur flacon Varispenser 2 et Varispenser 2x d’Eppendorf vous permettent de distribuer les liquides en toute sécurité à partir d’un grand choix de flacons, sans gaspillage de réactif, et représentent l’outil idéal pour une distribution pratique d’aliquotes de liquides à partir de grands flacons d’échantillonnage. Résistant aux produits chimiques et autoclavable, leur joint étanche offre une protection contre les milieux caustiques.

Afficher plus d’informations produit

En savoir plus sur le développement durable et l’ergonomie chez Eppendorf

Vous trouverez plus d’informations à télécharger au bas de cette page

Informations produit

Données techniques

Applications

Caractéristiques

Une distribution sans compromis, facile et fiable de liquides à partir de flacons
Maîtrisez les tâches de distribution de liquides difficiles grâce aux distributeurs sur flacon Varispenser 2 et Varispenser 2x universellement applicables. Disponibles en six tailles différentes pour la distribution de volumes de liquides de 0,2 – 100 mL, les Varispenser 2 et 2x sont conçus pour distribuer de manière uniforme des volumes sélectionnés sans gaspillage de réactif. La technologie unique intégrant une lèvre d’étanchéité en PFA empêche la formation de cristaux de résidus de milieux en essuyant la paroi interne du cylindre pendant la distribution. Cette technologie, combinée à leur résistance élevée aux produits chimiques, permet aux Varispenser 2 et 2x d’être utilisés pour pratiquement tous les types de liquides, y compris les solutions corrosives comme les acides, les bases ou les solvants.
Une conception spéciale du filetage et trois adaptateurs de filetage supplémentaires garantissent leur utilisation avec la plupart des grands flacons d’échantillonnage et de réactifs au laboratoire, tandis qu’un capuchon avec aération supplémentaire aide à prévenir toute contamination possible du flacon d’échantillonnage. Le bloc de valves rotatives à 360° offre sécurité et facilité d’accès dans toutes les positions. Varispenser 2 et Varispenser 2x rendent l’aliquotage vraiment plus sûr et plus pratique.
Le Varispenser 2x possède une valve de distribution retour supplémentaire qui empêche la perte de réactif pendant la ventilation. Les deux variantes sont entièrement autoclavables.

Large choix d’accessoires pour tous vos besoins de distribution de grands volumes de liquides

Divers accessoires sont disponibles pour les distributeurs sur flacon Varispenser 2 et Varispenser 2x pour vous aider à surmonter tout défi de distribution de liquides que vous pourriez rencontrer au laboratoire. Choisissez parmi une sélection de tubes de dessiccation, de filtres, de canules de distribution réglables et plus encore pour accélérer vos flux de travaux et éviter toute contamination. Pour en savoir plus sur les accessoires adaptés pour votre distributeur sur flacon, consultez notre livre blanc No. 38.

Le distributeur sur flacon idéal pour travailler avec des produits chimiques corrosifs

Que vous manipuliez des liquides corrosifs, inflammables, de viscosité élevée ou volatils, les fonctions de sécurité intégrées des Varispenser 2 ou Varispenser 2x vous protègent contre les déversements accidentels et garantissent une utilisation sans effort et en douceur. Grâce à leur résistance élevée aux produits chimiques, ces distributeurs sur flacon peuvent être utilisés avec divers réactifs liquides, pour tout un éventail d’applications courantes des laboratoires de biologie, de pharmacie, de chimie ou de recherche médico-légale - tout en offrant une étanchéité supérieure sur une large plage de températures et de viscosités.

How to use a Varispenser 2 bottle-top dispenser

Attach the telescopic aspirating tube and recirculation valve (Varispenser 2x only) to the bottle-top dispenser before attaching it to your supply bottle using the appropriate adapter. Unlock the volume selection slider by pushing it to the right, slide it to your desired volume and lock it by pushing the slider to the left. Vent the dispenser by pulling up the piston and pushing it down to dispense liquid into any target vessel until the liquid inside the cylinder is free from air bubbles. Dispense liquid by following the same steps after venting. Note that the dispenser is not a suitable bottle closure and should be removed from the bottle and properly cleaned after use. Learn more in our tutorial videos and by reading the operating manual.

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Caractéristiques	Varispenser^® 2x - 4967000014	Varispenser^® 2 - 4966000010	Varispenser^® 2x - 4967000022	Varispenser^® 2 - 4966000029	Varispenser^® 2x - 4967000030	Varispenser^® 2 - 4966000037	Varispenser^® 2x - 4967000049	Varispenser^® 2 - 4966000045	Varispenser^® 2x - 4967000057	Varispenser^® 2 - 4966000053	Varispenser^® 2x - 4967000065	Varispenser^® 2 - 4966000061

Type de produit	Distributeurs	Distributeurs	Distributeurs	Distributeurs	Distributeurs	Distributeurs	Distributeurs	Distributeurs	Distributeurs	Distributeurs	Distributeurs	Distributeurs
Type de pipetage	Système à déplacement positif	Système à déplacement positif	Système à déplacement positif	Système à déplacement positif	Système à déplacement positif	Système à déplacement positif	Système à déplacement positif	Système à déplacement positif	Système à déplacement positif	Système à déplacement positif	Système à déplacement positif	Système à déplacement positif
Nombre de canaux	1-canal	1-canal	1-canal	1-canal	1-canal	1-canal	1-canal	1-canal	1-canal	1-canal	1-canal	1-canal
Plage de volume	0,2 – 2 mL	0,2 – 2 mL	0,5 – 5 mL	0,5 – 5 mL	1 – 10 mL	1 – 10 mL	2,5 – 25 mL	2,5 – 25 mL	5 – 50 mL	5 – 50 mL	10 – 100 mL	10 – 100 mL
Incrément de volume	0,05 mL	0,05 mL	0,1 mL	0,1 mL	0,2 mL	0,2 mL	0,5 mL	0,5 mL	1 mL	1 mL	1 mL	1 mL
Mode de fonctionnement	mécanique	mécanique	mécanique	mécanique	mécanique	mécanique

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Varispenser® 2/ Varispenser® 2x - distributeur sur flacon

The Varispenser 2(x) from Eppendorf is available in six different volume sizes

Eppendorf Varispenser® 2 and Varispenser® 2x bottle-top dispensers – six different sizes for dispensing volumes from 0.2 – 100 mL

Lab technician using the Eppendorf Varispenser® 2x bottle-top dispenser

Easily fill Conical Tubes with the Varispenser® 2(x) bottle-top dispenser from Eppendorf

Lab technician using the Eppendorf Varispenser® 2x bottle-top dispenser to fill a glass vial

The Varispenser® 2x bottle-top dispenser's recirculation valve lever

The Varispenser® 2(x) bottle-top dispensers feature an easy-to-read volume scale

Varispenser® 2/2x bottle-top dispenser ventilation screw with filter

Varispenser® 2 bottle-top dispensers from Eppendorf are resistant to many chemicals and autoclavable

Varispenser® 2x bottle-top dispensers with the Eppendorf Top Buret

Varispenser® 2 and 2x bottle-top dispensers from Eppendorf fit on a variety of supply bottles and are chemical-resistant

General handling

Working with small vials

Handle fuming acids with ease

How to Properly Handle Liquids from Bottles

Informations produit

Varispenser® 2(x) Bottle-Top Dispenser

Produits (12)

Services (9)

Accessoires (23)

Pièces de rechange (13)

Informations produit

Large choix d’accessoires pour tous vos besoins de distribution de grands volumes de liquides

Le distributeur sur flacon idéal pour travailler avec des produits chimiques corrosifs

How to use a Varispenser 2 bottle-top dispenser

Données techniques

Varispenser^® 2/ Varispenser^® 2x - distributeur sur flacon

Eppendorf Varispenser® 2 and Varispenser® 2x bottle-top dispensers – six different sizes for dispensing volumes from 0.2 – 100 mL

Varispenser^® 2(x) Bottle-Top Dispenser