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 - 瓶口分液器

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

产品信息

您是否需要一款用于处理酸、碱或溶液等腐蚀性溶液的瓶口分液器？Eppendorf瓶口分液器Varispenser 2和Varispenser 2x 允许您安全地从各种瓶子中分配液体，而不会浪费试剂，是方便地从大型供应瓶中分配液体试剂的理想选择。耐化学腐蚀，可高压灭菌，密封良好，防止腐蚀性介质。

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用途

特征

从瓶中分液既安全又方便
使用Varispenser 2和Varispenser 2x通用瓶口分液器，处理困难的分液任务。Varispenser 2和2x有6 种规格可选，分液体积介于 0.2 –  – 100 mL 之间，可高重复性地分液且不浪费试剂。搭载独特的PFA密封技术，可在分液过程中擦拭内筒壁，防止介质残留形成晶体。Varispenser 2和2x仅搭载这项技术，而且具备出色的耐化学性，可以用于几乎所有类型的液体，包括酸、碱或溶剂等腐蚀性溶液。
采用特殊的螺纹设计并配备额外的螺纹适配器，可与实验室中多数大型供应瓶和试剂瓶一起使用，而额外的通气盖有助于防止供应瓶产生污染。搭载360°旋转阀组，Varispenser 2和Varispenser 2x可在所有位置便捷使用，提高操作安全性。
Varispenser 2x配备额外的再循环阀，可防止通气时的试剂浪费。两种型号均可整机高温高压灭菌。

多种配件可供选择，满足您的大容量分液需求
Varispenser 2和Varispenser 2x瓶口分液器提供多种配件，助您克服实验室中可能遇到的任何分液挑战。选择干燥管、过滤器、可变排放管等众多配件，以加快您的工作流程并防止污染。请阅读我们第 38号白皮书，了解有关瓶口分液器配件的更多信息。38.

在处理腐蚀性化学品时，请选择瓶口分液器
无论您处理的是腐蚀性、易燃性、高粘度或挥发性液体，Varispenser 2或Varispenser 2x的内置安全功能都能保护您免受意外泄漏伤害，并确保顺利、轻松的操作流程。这些瓶口分液器具备出色的耐化学性，可以与各种液体试剂一起使用，适合生物、制药、化学或法医实验室应用，同时能在各种温度或粘度条件下提供卓越的密封性能。

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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规格	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

产品类型	分液器	分液器	分液器	分液器	分液器	分液器	分液器	分液器	分液器	分液器	分液器	分液器
移液类型	外置活塞系统	外置活塞系统	外置活塞系统	外置活塞系统	外置活塞系统	外置活塞系统	外置活塞系统	外置活塞系统	外置活塞系统	外置活塞系统	外置活塞系统	外置活塞系统
通道数量	1-通道	1-通道	1-通道	1-通道	1-通道	1-通道	1-通道	1-通道	1-通道	1-通道	1-通道	1-通道
体积范围	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
体积增量	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
操作模式	手动	手动	手动	手动	手动	手动	手动	手动	手动	手动	手动	手动
随机测量误差	0.2 mL: ± 1%; ± 2 µL 1 mL: ± 0.2%; ± 2 µL 2 mL: ± 0.1%; ± 2 µL	0.2 mL: ± 1%; ± 2 µL 1 mL: ± 0.2%; ± 2 µL 2 mL: ± 0.1%; ± 2 µL	0.5 mL: ± 1%; ± 5 µL 2.5 mL: ± 0.2%; ± 5 µL 5 mL: ± 0.1%; ± 5 µL	0.5 mL: ± 1%; ± 5 µL 2.5 mL: ± 0.2%; ± 5 µL 5 mL: ± 0.1%; ± 5 µL	1 mL: ± 1%; ± 10 µL 5 mL: ± 0.2%; ± 10 µL 10 mL: ± 0.1%; ± 10 µL	1 mL: ± 1%; ± 10 µL 5 mL: ± 0.2%; ± 10 µL 10 mL: ± 0.1%; ± 10 µL	2.5 mL: ± 1%; ± 25 µL 12.5 mL: ± 0.2%; ± 25 µL 25 mL: ± 0.1%; ± 25 µL	2.5 mL: ± 1%; ± 25 µL 12.5 mL: ± 0.2%; ± 25 µL 25 mL: ± 0.1%; ± 25 µL	5 mL: ± 1%; ± 50 µL 25 mL: ± 0.2%; ± 50 µL 50 mL: ± 0.1%; ± 50 µL	5 mL: ± 1%; ± 50 µL 25 mL: ± 0.2%; ± 50 µL 50 mL: ± 0.1%; ± 50 µL	10 mL: ± 1%; ± 100 µL 50 mL: ± 0.2%; ± 100 µL 100 mL: ± 0.1%; ± 100 µL	10 mL: ± 1%; ± 100 µL 50 mL: ± 0.2%; ± 100 µL 100 mL: ± 0.1%; ± 100 µL
系统测量误差	0.2 mL: ± 5%; ± 10 µL 1 mL: ± 1%; ± 10 µL 2 mL: ± 0.5%; ± 10 µL	0.2 mL: ± 5%; ± 10 µL 1 mL: ± 1%; ± 10 µL 2 mL: ± 0.5%; ± 10 µL	0.5 mL: ± 5%; ± 25 µL 2.5 mL: ± 1%; ± 25 µL 5 mL: ± 0.5%; ± 25 µL	0.5 mL: ± 5%; ± 25 µL 2.5 mL: ± 1%; ± 25 µL 5 mL: ± 0.5%; ± 25 µL	1 mL: ± 5%; ± 50 µL 5 mL: ± 1%; ± 50 µL 10 mL: ± 0.5%; ± 50 µL	1 mL: ± 5%; ± 50 µL 5 mL: ± 1%; ± 50 µL 10 mL: ± 0.5%; ± 50 µL	2.5 mL: ± 5%; ± 125 µL 12.5 mL: ± 1%; ± 125 µL 25 mL: ± 0.5%; ± 125 µL	2.5 mL: ± 5%; ± 125 µL 12.5 mL: ± 1%; ± 125 µL 25 mL: ± 0.5%; ± 125 µL	5 mL: ± 5%; ± 250 µL 25 mL: ± 1%; ± 250 µL 50 mL: ± 0.5%; ± 250 µL	5 mL: ± 5%; ± 250 µL 25 mL: ± 1%; ± 250 µL 50 mL: ± 0.5%; ± 250 µL	10 mL: ± 5%; ± 500 µL 50 mL: ± 1%; ± 500 µL 100 mL: ± 0.5%; ± 500 µL	10 mL: ± 5%; ± 500 µL 50 mL: ± 1%; ± 500 µL 100 mL: ± 0.5%; ± 500 µL
高温高压灭菌	是	是	是	是	是	是	是	是	是	是	是	是
开放系统（第三方耗材）	是	是	是	是	是	是	是	是	是	是	是	是
螺纹	GL 45	GL 45	GL 45	GL 45	GL 45	GL 45	GL 45	GL 45	GL 45	GL 45	GL 45	GL 45
螺纹瓶口适配器包括	GL 25、GL 28/S 28、GL 32、GL 38、S 40¹⁾¹⁾	GL 25、GL 28/S 28、GL 32、GL 38、S 40¹⁾¹⁾	GL 25、GL 28/S 28、GL 32、GL 38、S 40¹⁾¹⁾	GL 25、GL 28/S 28、GL 32、GL 38、S 40¹⁾¹⁾	GL 25、GL 28/S 28、GL 32、GL 38、S 40¹⁾¹⁾	GL 25、GL 28/S 28、GL 32、GL 38、S 40¹⁾¹⁾	GL 32、GL 38、S 40¹⁾	GL 32、GL 38、S 40¹⁾	GL 32、GL 38、S 40¹⁾	GL 32、GL 38、S 40¹⁾	GL 32、GL 38、S 40¹⁾	GL 32、GL 38、S 40¹⁾
交付内容	分液器，操作手册，证书，可伸缩吸液管（125 mm - 240 mm），螺口适配器（x5：25 mm、28 mm、32 mm、38 mm、40 mm），通用扳手	分液器，操作手册，证书，可伸缩吸液管（125 mm - 240 mm），螺口适配器（x5：25 mm、28 mm、32 mm、38 mm、40 mm），通用扳手	分液器，操作手册，证书，可伸缩吸液管（125 mm - 240 mm），螺口适配器（x5：25 mm、28 mm、32 mm、38 mm、40 mm），通用扳手	分液器，操作手册，证书，可伸缩吸液管（125 mm - 240 mm），螺口适配器（x5：25 mm、28 mm、32 mm、38 mm、40 mm），通用扳手	分液器，操作手册，证书，可伸缩吸液管（125 mm - 240 mm），螺口适配器（x5：25 mm、28 mm、32 mm、38 mm、40 mm），通用扳手	分液器，操作手册，证书，可伸缩吸液管（125 mm - 240 mm），螺口适配器（x5：25 mm、28 mm、32 mm、38 mm、40 mm），通用扳手	分液器，操作手册，证书，可伸缩吸液管（170 mm - 330 mm），螺口适配器（x3：32 mm、38 mm、40 mm），通用扳手	分液器，操作手册，证书，可伸缩吸液管（170 mm - 330 mm），螺口适配器（x3：32 mm、38 mm、40 mm），通用扳手	分液器，操作手册，证书，可伸缩吸液管（170 mm - 330 mm），螺口适配器（x3：32 mm、38 mm、40 mm），通用扳手	分液器，操作手册，证书，可伸缩吸液管（170 mm - 330 mm），螺口适配器（x3：32 mm、38 mm、40 mm），通用扳手	分液器，操作手册，证书，可伸缩吸液管（170 mm - 330 mm），螺口适配器（x3：32 mm、38 mm、40 mm），通用扳手	分液器，操作手册，证书，可伸缩吸液管（170 mm - 330 mm），螺口适配器（x3：32 mm、38 mm、40 mm），通用扳手