Volumetric flasks provide precise results in chemistry and pharmacy. They are not scaled, but have a single ring mark that is drawn all the way round the neck to avoid reading errors.
The narrow neck results in high setting accuracy. In addition, volumetric flasks have bulbous curves in the upper area so that any gas bubbles that form can escape from the solution more easily. However, if there are gas bubbles in the solution, the volumetric flask must be swivelled slightly so that the bubbles rise to the top. In addition to volumetric pipettes and burettes, volumetric flasks are therefore the most accurate volumetric instruments in the laboratory for analysis.
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Bosshead for overhead stirrers
IKA-Werke
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Crescent-shaped stirring rotors, PTFE
Bohlender
The stirrer shafts consist of a PTFE-jacketed, stainless steel shaft and a stirrer paddle made of solid PTFE. The stainless steel core assures stability of the stirrer shaft and allows safe attachment of the stirrer chuck. Thanks to the thick PTFE coat and the paddle made of solid PTFE, the medium will only come into contact with PTFE. High chemical resistance makes it almost universally suitable. PTFE is extremely nonstick so that residues are repelled from shaft and paddle. The stirrer shafts are similar in size to (KPG) glass stirring rods and are therefore interchangeable easily....
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The stirrer shafts consist of a PTFE-jacketed, stainless steel shaft and a stirrer paddle made of solid PTFE. The stainless steel core assures stability of the stirrer shaft and allows safe attachment of the stirrer chuck. Thanks to the thick PTFE coat and the paddle made of solid PTFE, the medium will only come into contact with PTFE. High chemical resistance makes it almost universally suitable. PTFE is extremely nonstick so that residues are repelled from shaft and paddle. The stirrer shafts are similar in size to (KPG) glass stirring rods and are therefore interchangeable easily.
Operating temperature: -200°C to +250°C
Additional sizes and accessories are available on request. Information on the mixing effects of the different stirring geometries can be found in the descriptions of the stainless steel stirring rotors. The semi-circular shape of the paddle is ideal for mixing in round-bottom flasks. The pivoting blade allows insertion into vessels with narrow necks and/or ground joints.
The 3-blade propellers produce axial flow, and reduce shear forces to a minimum, even at high stirring speeds, thanks to their optimised blade design. Recommended for medium to high speed operations.
Other sizes available on request....
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The 3-blade propellers produce axial flow, and reduce shear forces to a minimum, even at high stirring speeds, thanks to their optimised blade design. Recommended for medium to high speed operations. Other sizes available on request.
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Additional Stirrer Blades for Bola Stirrer Shafts, PTFE
Bohlender
Useful extension to the existing range of Bola stirrer shafts. The additional blades can optionally be fixed in your preferred position on every stirrer shaft with diameter 8,10 or 16 mm (a flat spanner is included). The stirrer blades are entirely made of PTFE, the mounting devices are made of a special PTFE-compound. A high chemical and thermical (-200 to +250 °C) resistance is assured. This "building block system" allows the user to define a stirrer of their own special requirements....
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Useful extension to the existing range of Bola stirrer shafts. The additional blades can optionally be fixed in your preferred position on every stirrer shaft with diameter 8,10 or 16 mm (a flat spanner is included). The stirrer blades are entirely made of PTFE, the mounting devices are made of a special PTFE-compound. A high chemical and thermical (-200 to +250 °C) resistance is assured. This "building block system" allows the user to define a stirrer of their own special requirements.
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Anchor stirring rotors, stainless steel
Buddeberg
The anchor-shape rotor creates a tangential flow and high shear forces between the vessel wall and stirring blades. This stirrer is especially suitable for medium to high viscosity fluids. Recommended for low speed operations....
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The anchor-shape rotor creates a tangential flow and high shear forces between the vessel wall and stirring blades. This stirrer is especially suitable for medium to high viscosity fluids. Recommended for low speed operations.
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Anchor stirrer, PTFE
Bohlender
The stirrer shafts consist of a PTFE-jacketed, stainless steel shaft and a stirrer paddle made of solid PTFE. The stainless steel core assures stability of the stirrer shaft and allows safe attachment of the stirrer chuck. Thanks to the thick PTFE coat and the paddle made of solid PTFE, the medium will only come into contact with PTFE. High chemical resistance makes it almost universally suitable. PTFE is extremely nonstick so that residues are repelled from shaft and paddle. The stirrer shafts are similar in size to (KPG) glass stirring rods and are therefore interchangeable easily....
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The stirrer shafts consist of a PTFE-jacketed, stainless steel shaft and a stirrer paddle made of solid PTFE. The stainless steel core assures stability of the stirrer shaft and allows safe attachment of the stirrer chuck. Thanks to the thick PTFE coat and the paddle made of solid PTFE, the medium will only come into contact with PTFE. High chemical resistance makes it almost universally suitable. PTFE is extremely nonstick so that residues are repelled from shaft and paddle. The stirrer shafts are similar in size to (KPG) glass stirring rods and are therefore interchangeable easily.
Operating temperature: -200°C to +250°C
Additional sizes and accessories are available on request. Information on the mixing effects of the different stirring geometries can be found in the descriptions of the stainless steel stirring rotors. Recommended for low speed operations.
The 4-blade diagonal blade stirring rotor provides axial flow and creates increasing shear forces at higher stirring speeds. Recommended for medium to high speed operations.
Other sizes available on request....
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The 4-blade diagonal blade stirring rotor provides axial flow and creates increasing shear forces at higher stirring speeds. Recommended for medium to high speed operations. Other sizes available on request.
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Blade stirrer, stainless steel 1.4571
IKA-Werke
Generates a radial flow. For drawing the material to be mixed from the top and bottom. For aerating of low viscosity media and for homogenizing solids in liquids. Used at medium to high speeds....
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Generates a radial flow. For drawing the material to be mixed from the top and bottom. For aerating of low viscosity media and for homogenizing solids in liquids. Used at medium to high speeds.
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BuddeMix Stirring System 1 - 4
Buddeberg
This novel stirring system has been conceived to mix low viscosity fluids as well as highly viscous media at slow speeds. Its special design creates inherent dynamic currents to produce perfectly homogeneous mixing results in very little time. Additional components like baffles, bottom bearings, etc. are not needed....
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This novel stirring system has been conceived to mix low viscosity fluids as well as highly viscous media at slow speeds. Its special design creates inherent dynamic currents to produce perfectly homogeneous mixing results in very little time. Additional components like baffles, bottom bearings, etc. are not needed.
Advantages at a glance:
suitable for low to highly viscous fluids
stirs media containing solids and fibres without any difficulty
gentle, low-shear stirring, due to slow stirring speed
constant product temperature, with no heating effect
short mixing times as the entire contents of the container are agitated
no air addition, no foaming
no baffles required
low gear wear due to balanced forces
minimal power consumption thanks to low speeds and short operation times
easy cleaning
material no. 1.4404
Particularly for potentially explosive atmospheres:
a single stirring zone, near to the container base, ensures easy mixing of settled residues, e.g. in flow-through mixing containers
no baffles required, thus no additional sources of ignition
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Customised shaft length possible. Fine polishing Ra 0.6 to 0.8 µm and/or material certificate available on request.
The folding blades of this 2-blade centrifugal stirring rotor open with increasing speed, allowing use with narrow-neck vessels. The stirring effect it provides is similar to a standard diagonal blade stirring rotor. Recommended for medium to high speed operations....
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The folding blades of this 2-blade centrifugal stirring rotor open with increasing speed, allowing use with narrow-neck vessels. The stirring effect it provides is similar to a standard diagonal blade stirring rotor. Recommended for medium to high speed operations.
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Compressed air industrial stirrers BSR 64 with floor stand
Buddeberg
BSR series stirrers perform routine mixing tasks up to 200 l.
General specifications:
operating pressure max. 6 bar
air consumption 800 l/min. at 6 bar
power output 640 W at 6 bar
clockwise rotation
ATEX rating to Ex II 2G Ex h IIC T5 Gb
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BSR series stirrers perform routine mixing tasks up to 200 l.
General specifications:
operating pressure max. 6 bar
air consumption 800 l/min. at 6 bar
power output 640 W at 6 bar
clockwise rotation
ATEX rating to Ex II 2G Ex h IIC T5 Gb
Basic models include:
all-stainless steel housing
continuously adjustable speed control valve
spherical clamping device with support arm diam. 16 mm, length 200 mm
floor stand with rod (height 1000 mm, width 600 mm) and bosshead
plug-in connector DN 7.8
silencer
output shaft L 32 mm x diam. 14 mm
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Compressed air powered stirrers, PLR, accessories
Buddeberg
Connection couplings VK: Fixed-diameter connection for motor/magnetic coupling drive shaft and stirring rod. Suitable for use in potentially explosive atmospheres. Material No. 1.4404.
Flexible glass stirring shaft couplings PK: For stirring tasks using glass stirring rods. Elastic connector between motor and stirring shaft. Provides exact alignment of motor and shaft, and evens out axial and height differences. Accepts 6mm to 10mm diameter shafts....
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Connection couplings VK: Fixed-diameter connection for motor/magnetic coupling drive shaft and stirring rod. Suitable for use in potentially explosive atmospheres. Material No. 1.4404. Flexible glass stirring shaft couplings PK: For stirring tasks using glass stirring rods. Elastic connector between motor and stirring shaft. Provides exact alignment of motor and shaft, and evens out axial and height differences. Accepts 6mm to 10mm diameter shafts. Flexible glass stirring shaft couplings K: For stirring tasks using glass stirring rods. Elastic connector between motor and stirring shaft. Provides exact alignment of motor and shaft, and evens out axial and height differences. Accepts 6mm to 10mm diameter shafts Double-Cardan-Coupling DCK I: With 8mm dia. hexagonal input drive receiver and 6mm square socket drive output.
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Connection couplings
Buddeberg
Fixed-diameter connection between motor and stirring shaft. Suitable for use in potentially explosive atmospheres (ATEX). Material no. 1.4404...
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Fixed-diameter connection between motor and stirring shaft. Suitable for use in potentially explosive atmospheres (ATEX). Material no. 1.4404
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Disposable Inoculation Loops / Needles
Greiner
Needles ideal for picking single colonies. Flexible loops for easier collection and inoculation.
Proporties:
Sterilised by irradiation
Colour coding for volume differentiation
Single and bulk packaging options
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Needles ideal for picking single colonies. Flexible loops for easier collection and inoculation.
Proporties:
Sterilised by irradiation
Colour coding for volume differentiation
Single and bulk packaging options
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Dissolver stirring rotors, stainless steel 1.4404
Buddeberg
The dissolver stirring rotor creates a radial flow with high turbulence. The mixture is drawn from top to bottom. High shear forces are created at the dissolver disk, which provides effective particle reduction. Recommended for medium to high speed operations....
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The dissolver stirring rotor creates a radial flow with high turbulence. The mixture is drawn from top to bottom. High shear forces are created at the dissolver disk, which provides effective particle reduction. Recommended for medium to high speed operations.
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Impellers VISCO JET®
Heidolph Instruments
The worldwide patented VISCO JET
® Mixing System is the result of the so-called cone-principle. Turbulent flows are created at the taper end by acceleration, displacement and retardation. These flows advance through the stirred medium and result in the new dynamic mixing motion.
One system for literally all mixing tasks for low to high viscosity media
Patented cone-principle creates even at low speeds a turbulent flow which is unique to the VISCO JET®
Even with high-viscosity media and gels which naturally do not mix by using common impellers you will observe an immediate flow through the entire beaker
This technology allows for de-gassing of gels while preventing air intake and foaming
Reduce process times significantly while performing the best mixing result ever
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The worldwide patented VISCO JET® Mixing System is the result of the so-called cone-principle. Turbulent flows are created at the taper end by acceleration, displacement and retardation. These flows advance through the stirred medium and result in the new dynamic mixing motion.
One system for literally all mixing tasks for low to high viscosity media
Patented cone-principle creates even at low speeds a turbulent flow which is unique to the VISCO JET®
Even with high-viscosity media and gels which naturally do not mix by using common impellers you will observe an immediate flow through the entire beaker
This technology allows for de-gassing of gels while preventing air intake and foaming
Reduce process times significantly while performing the best mixing result ever
The stirring systems are made of stainless steel (V4A or AISI 316 Ti) or polyoxymethylene (POM).
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Other versions available.
Moebius stirrer, stainless steel 1.4571
IKA-Werke
Generates axial flow. For drawing the material to be mixed from above. For circulating and handling low to medium viscous liquids. Recommended for medium speed operations....
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Generates axial flow. For drawing the material to be mixed from above. For circulating and handling low to medium viscous liquids. Recommended for medium speed operations.
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Overhead stirrer rotors, centrifugal paddle, PTFE
Bohlender
With PTFE-coated, stainless steel shaft....
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With PTFE-coated, stainless steel shaft.
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Overhead Stirrer shafts
Bibby
Stainless steel. Supplied as separate 8mm diameter shaft with tapped screwthread end onto which can be attached a choice of paddle types. Lengths as indicated....
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Stainless steel. Supplied as separate 8mm diameter shaft with tapped screwthread end onto which can be attached a choice of paddle types. Lengths as indicated.
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Paddle stirring rotors, stainless steel
IKA-Werke
The paddle stirring rotor creates a tangential flow with minimum turbulence. Its design ensures a gentle action on sensitive products and good heat exchange. Recommended for low to medium speed operations.
Other sizes available on request....
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The paddle stirring rotor creates a tangential flow with minimum turbulence. Its design ensures a gentle action on sensitive products and good heat exchange. Recommended for low to medium speed operations. Other sizes available on request.
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Paddles
Bibby
For use with 9.950 401 and 9.950 402 shafts....
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For use with 9.950 401 and 9.950 402 shafts.
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Paddles, 4 blade propeller
Apollo
Stainless steel 1.4301. With screwthread shaft connection as outlined below....
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Stainless steel 1.4301. With screwthread shaft connection as outlined below.
PLR compressed air laboratory stirrers up to 30 L for use in potentially explosive atmospheres, without/with tachometer
Buddeberg
PLR compressed air laboratory stirrers are designed for all kinds of standard mixing tasks. The vane type, air-driven motor offers a high power density and is significantly lighter and smaller than an equivalent electric motor.
General specifications:
operating pressure max. 6 bar
air consumption 260 L/min. at 6 bar
power output 200W at 6 bar
clockwise rotation
ATEX certification
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PLR compressed air laboratory stirrers are designed for all kinds of standard mixing tasks. The vane type, air-driven motor offers a high power density and is significantly lighter and smaller than an equivalent electric motor.
Measuring flasks are an important instrument in numerous scientific and industrial applications. Their versatility makes them indispensable for the precise preparation of solutions and for volumetric analyses.
They are crucial for preparing reagents for experiments and reliably checking formulations and concentrations in the pharmaceutical industry. They are also useful aids in educational institutions such as schools, especially in subjects such as physics and chemistry.
helpers.
Highest quality volumetric flasks from Th. Geyer
Th. Geyer offers you a comprehensive range of volumetric flasks that are specially tailored to your individual needs. Benefit from our high standards of quality, safety and functionality. For over 130 years, we have been a reliable partner to numerous satisfied companies, organisations and public institutions.
institutions.
Whether for analytics, research or science - we are a full-range supplier. Our volumetric flasks and other products for your laboratory requirements fulfil all legal requirements. We are certified according to ISO 9001:2015 and comply with all directives of the EU regulation
REACH.
High-quality volumetric flasks for every requirement
Measuring flasks are essential for precise volume measurements in the production of chemical solutions and when carrying out analytical processes. At Th. Geyer you will find
a large selection of high-quality volumetric flasks in various sizes, materials and designs, with which you can ensure maximum accuracy when measuring a specific volume in chemistry and other natural sciences.
With their pear-shaped or conical design and sophisticated features, our models are ideal for a wide range of applications.
areas of application.
Our range boasts many different models made of high-quality borosilicate glass or plastic. They are calibrated to "In" and "Ex", graduated in blue or white and comply with DIN EN ISO
1042:
LABSOLUTE® Class A volumetric flasks with PE stopper or with hollow glass stopper
LABSOLUTE® Class A volumetric flasks in trapezoidal shape graduated in blue or white
DURAN® Class A volumetric flasks with PE stopper or with amber glass stopper
Nalgene™ volumetric flasks
Class B volumetric flasks made of PP with screw cap
BLAURAND® graduated cylinder with high mould and individual USP certificate
Variants for determining the oil content
Variants for sugar analysis
Dosing attachments for automatic tilting machines of the DURAN® tube
and much more
Excellent volumetric flasks and top advice
At Th. Geyer, you can order safely and easily from a single experienced source. You will receive both small and large quantities of volumetric flasks of the highest quality at an attractive price-performance ratio. Still haven't found what you're looking for? Browse through related product categories, such as graduated cylinders and
mixing cylinders.
We look forward to your personal enquiry and will be happy to advise you personally and individually. Simply contact us without obligation. We are here for you
here for you