How is a hay infusion prepared?

Valuable tips and tricks: hay infusion under the microscope

At present, winter is back with full force, and smaller ponds are even completely frozen. It is foreseeable that it will take some time before most aquatic organisms, ornamental algae and other microorganisms canbe found in sufficient numbers in nature. A hay infusion is ideal for this microscopic "dead season".

Important: Disease-causing organisms can also proliferate in a hay infusion. It is essential to ensure strict hygiene when handling the infusion (e. g. wash hands thoroughly after handling the samples)!

For the hay infusion, a small handful of hay or dried grass, leaf litter or a little moss is infused in water. In hay or on other dry plants, leaf litter etc., there are numerous resting stages of bacteria (e. g. spores of the so-called "hay bacterium" Bacillus subtilis), algae, other protozoa or rotifers and waterbears. After a few days in the water, these organisms come back to life. The bacteria that decompose the plant material multiply very strongly and form a bio-film on the surface of the water. Bacteria serve as the basis of nutrition for many other organisms, e. g. ciliates, amoebae or heliozoa. A few days later, these organisms also proliferate more and more. Some are big enough to be seen with the naked eye as tiny floating dots in the upper layers of the infusion. Subsequently, predatory organisms that feed on ciliates appear. This includes Coleps or cyclops. Bacterial degradation produces nutrients such as nitrate and phosphate, which act as food for the algae and eventually turn the water and glass surface green. This way an increasingly diverse community of countless organisms develops from day to day.

However, not all microorganisms develop such permanent stages. The well-known Paramecium, for example, are not included. If such single-celled organisms are to be propagated, then the water in the infusion must come from a pond or an aquarium. With tap water or mineral water it is not possible to reproduce Paramecium in a hay infusion. They are very common in mud, on aquatic plants or in the filter of the aquarium.However, not all microorganisms develop such permanent stages. The well-known Paramecium, for example, are not included. If such single-celled organisms are to be propagated, then the water in the infusion must come from a pond or an aquarium. With tap water or mineral water it is not possible to reproduce Paramecium in a hay infusion. They are very common in mud, on aquatic plants or in the filter of the aquarium.

If you want to observe the organisms for several weeks, you can top up evaporated water with distilled water or rainwater on a regular basis. Paramecium, rotifers and some others can also be fed specifically to increase the rate of reproduction. Afterwards one can try to inoculate a new culture with the desired organisms and multiply them further. Fishkeepers who want to use such single-celled organisms as food for very small fish fry feed such live cultures with condensed milk, microalgae or yeast. Bacteria multiply more strongly when a corn of rice or grain is added to the mixture. Special powdered food and food suspensions are available from specialist aquarium retailers.

If, for example, Paramecium or rotifers from the infusion are to be used for the rearing of juvenile fish, no Coleps must be present in the batch. These usually feed on other ciliates, but can multiply in large quantities in the live culture or breeding tank. Coleps then colonize the fish's mucous skin and can cause severe damage to the fish fry! Therefore, a regular microscopic control of all food cultures, but also in the breeding tank is highly recommended. Coleps do not necessarily have to be introduced from live cultures, they are commonly present in the aquarium anyway and multiply even if the fry is fed on staple food and flakes only.

How to prepare the infusion:

Put a small handful of hay or other dry plant residues (leaves, moss) into a large (approx. 1L) jar and add about 500mL of water. Ideal is water from a pond or aquarium. Cover the vessel loosely (e. g. with a piece of kitchen towel and a rubber band) and place it in a warm, bright spot (at least at room temperature, but without direct sunlight). The infusion can start to smell especially with too much hay, this should be taken into account when choosing the location.

After a few days, the biofilm is formed from bacteria, and gradually the various larger organisms appear. As the oxygen content in the vessel decreases sharply from top to bottom, other organisms are found on the surface than on the bottom. Depending on the pH-value and mineral content, the community can also change in the hay infusion; if the water contains silicate, diatoms appear as a brownish coating on the glass.

If the batch is no longer needed, it should be disposed of and all containers or tools should be disinfected with hot water and thoroughly cleaned.

Which organisms can be found in the infusion?

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€339.90*

Nexcope NIB630 inverted research microscope with tiltable lighting unit

The NIB 630 is the flagship of the NIB600 series of inverted microscopes. With such an inverted design, the device enables the microscopy of plankton, microalgae and cell cultures. Cell cultures can be examined directly in the culture vessel without taking samples. For particularly easy sample handling, it is equipped with a tiltable lighting unit. This means that even tall vessels can be placed comfortably without bumping against the lighting unit. The microscope head is equipped with a height-adjustable ergo viewing head. This allows users of different heights to adjust the microscope to a comfortable and ergonomic viewing height with a single hand movement. This special microscope is used in water management offices, research institutes and universities, in human and veterinary medicine, agriculture, marine biology, limnology, aquaculture and many more. The integrated display informs you at any time about the selected magnification and the status of the illumination as well as the ECO mode. The brightness can be programmed for each objective so that there is no need to readjust when changing magnification and the user is not blinded. OBJECTIVE The NEXCOPE NIB630 microscope is equipped with a quintuple nosepiece. A 4x planachromatic objective and one each of 10x, 20x and 40x planachromatic phase contrast objectives are included. The condenser has a numerical aperture of 0.3 and an extra long working distance. The objectives are calculated for a soil thickness of 1.2 mm. Please use appropriate culture vessels. The universal specimen holder is suitable for standard slides. EYEPIECES The eyepieces have a field of view of 22 mm. This gives you a very large field of view. The high eye point makes them very comfortable even for spectacle wearers. A rubber edge protects against scratches on contact. Dioptric compensation from -5 to +5 can be individually adjusted for each eyepiece. The interpupillary distance can be adjusted between 48 mm and 75 mm. The binocular can be tilted up and down to adjust the viewing height. ILLUMINATION The Koehler illumination provides the best possible light guidance of the microscopy light. This avoids stray light and only illuminates the just visible area in the specimen. This protects sensitive living specimens from excessive light irradiation. The powerful 3W LED can be adjusted in brightness and ensures optimal illumination. The brightness can be adjusted individually for each objective. If an objective is changed, the NEXCOPE NIB630 automatically adjusts the previously set brightness. The display shows the currently selected lens and the current brightness. The tiltable lighting unit makes it easier to work with taller sample vessels. The adjustable condenser with extra-long working distance enables quick readiness for use. MECHANICS In addition to coarse focusing, fine focusing helps to bring the specimen into focus very precisely. A full turn of the fine focusing knob moves the stage up or down by 0.2 mm. On the right side, the fine focus can be adjusted with a finger. The friction of the coarse focusing can also be varied. The fine focusing knobs are held magnetically and can be mounted on the left or right. The XY stage offers the possibility of inserting various holders. This allows slides or even petri dishes to be inserted. CAMERA CONNECTION The NEXCOPE NIB630 is specially designed for use with C-mount cameras. The camera connection is located on the side and has a switch between visual observation and camera (100/0 or 0/100). You can choose from two different adapters, depending on the sensor size: 0.5x C-mount adapter 1x C-mount adapter (already included in the scope of delivery) ACCESSORIES (optional) Hoffman Modulation Contrast Relief 3D contrast Terasaki holder, Petri dish holder 54 mm and 90 mm Camera adapter for C-mount 0.5x FEATURES Professional inverted transmitted light microscope Type of objectives: infinity plan achromatic (60 mm adjustment length, M25) Precise mechanics Very bright illumination SCOPE OF DELIVERY Inverted transmitted light microscope 4x objectives, of which 10x, 20x and 40x as phase contrast objectives Filter slider for phase contrast Universal sample holder Centering telescope for phase contrast

Available

€10,900.00*

BRESSER Researcher Trino 40-1000x Microscope

The Researcher Trino offers observing fun for an unbeatable price. Based on a solid metal body and equipped with DIN eyepieces and objectives, this transmission-type microscope fulfils even professional demands with its optical and mechanical quality. Many details, for example the cross table for optimal object positioning or the focuser with coarse and fine drive for dead-sharp images. Instead of a binocular head, the Trino Researcher has a trinocular head. With this equipment, the observer can make binocular obseravtions and - at the same time! - take photographs or use a PC eyepiece Features Type: Biological microscope View: Trinocular Application range: Biology, Education, Teaching, Imaging Solutions, Botany Illumination: LED with dimmer Level: Intermediate, Expert Warranty: 2 years Double-lens condensor with iris diaphragm Incl. mechanical stage Adjustable eye relief Specifications Comfortable binocular view, 360° turnable head Magnifications: 1000x, 400x, 100x, 40x Illumination: LED Eyepieces: 10x Eyepiece diameter: 23.2 mm Objectives: 4x, 10x, 40x, 100x (oil immersion) Power supply: 220/240V Included Accessories 4 DIN-objectives 2 eyepieces Mechanical stage Condensor Trinocular head

Available

€499.90*

BRESSER Science TRM 301 Microscope

The BRESSER TRM-301 is a trinocular biological microscope of first-class quality: This means excellent imaging, good ergonomy, high stability and a modern attractive design. It is a laboratory microscope, which permits an intensive use, e.g. in medicine, biology, agriculture and industry area. Also, we can recommend it to the engaged hobbyist as his "microscope for a lifetime". A particular important feature of the TRM-301 is its ability for the Köhler illumination. This optimal illumination is bright, cool (going easy on the object), homogenous, reflex free and rich in contrast, so it makes the full use of the microscope optics. The Köhler illumination is standard for scientific research and microphotography. It is achieved with the fixed field diaphragm and the adjustable Abbe condenser (numerical aperture 1.25; with iris diaphragm). Naturally, the TRM-301 has the other features, which are typical for high-quality microscopes: lengthwise and cross moveable stage, ergonomic coaxial focusing knobs (fine focus: 200 µm / full turn), continous dimmer, planachromatic objectives (4x, 10x, 40x, 100x-oil retractable), 10x wide field eyepieces (mounted in 30° inclined eyepiece tubes), adjustment of eye relief, diopter adjustment and the phototube. FEATURESbiological microscopetype head: trinocularmagnification: 40x - 1000x2 eyepieces: both WF 10x (23mm)4 objectives: 4x, 10x, 40x, 100x oiltype objectives: planachromaticcondensor: Abbe N.A. 1.25illumination: 12V / 30W halogen with dimmerSCOPE OF DELIVERYMicroscope2x Eyepiece (WF 10x)4x Objective ( PL4x, PL10x, PL40x, PL100x oil)Coxial mechanical stage with Nonius scaleimmersion oildust coverpower cable

Available

€999.90*

BRESSER Analyth STR 10x - 40x stereo microscope

The Analyth STR comes with 3 different magnifications, that can easily be switched by turning the objective. It is easy to change magnifications from 10x to 20x or 40x. The stereo microscope will show structured objects nicely in 3D, which is especially impressive. The low starting magnification of 10x is helpful when working with children and will show objects in full up to a size of 20mm. With the wide magnification range, the Analyth STR is a versatile instrument. You can use it to view insects, plants, minerals and much more. It is useful for hobbyists, in schools and more. Typical professional applications include quality control, gardening or farming (pest control), hydrobiology and much more.The interpupilllary distance and the diopters can be adjusted to your needs. The eyepieces feature a big field of view of 20mm. They are equipped with rubber eyecups and have a locking screw to prevent loss or damage during transport.The power supply can be achieved through the AC adapter or with a set of 3 AA type batteries (batteries not included). This makes the microscope perfect for mobile use, e.g. outside in the garden or for biology field work. FEATURES Microscope with 3 pairs of objectives, magnifications 10x; 20x; 40x Wide field eyepieces with eyecups and 20mm field of view Bright, economical LED illumination, angle adjustable Illumination for incident and transmitted light can be switched separately Dimmer operation via a foil switch with status display Two specimen plates (black/white or glass matt), with specimen clips SCOPE OF DELIVERY Microscope with 3 objective magnifications 1x; 2x; 4x Metal stand with LED illumination, power supply and battery compartment 2 eyepieces with rubber eyecups Glass object plate Plastic object plate (black/white) Dust cover Operating instructions

Available

€254.90*

BRESSER Biolux NV 20x-1280x Microscope with HD USB Camera

The BRESSER Biolux NV comes with a wide range of accessories and is an ideal beginners' microscope. A unique feature of these models, the Barlow zoom system is inside the eyepiece tubes: With the barlow lens the magnification can be varied by a factor of 2 in visual observation. This feature, together with 3 objectives and 2 interchangeable wide field eyepieces gives a magnification range from 20x to 1280x. With the mechanical desk you can move your sample precisely even when observing at high magnifications. For optimal illumination a variable LED for transmitted and incident light together with a filter wheel gives the ideal light for all samples. Light from above is especially imortant to observe non transparent samples like leaves, small insects and much more. This makes microscopy for beginners very easy! The power is supplied by batteries (3x AA). A dust cover, 5 prepared slides and 5 blank slides and cover slips are included for making your own samples. With the included HD camera you can observe your samples on the computer screen, and capture images and video with the included Windows software. The software is compatible with Windows 10 and 11. With this camera, you can always document your interesting observations and share them with others. FEATURESbiological microscope with HD cameraLED light for transmitted and incident lightbattery-poweredlots of accessoriesincident light for objects not higher than 4mm SYSTEM REQUIREMENTSWindows 10 or 11Intel i3, i5, i7 or i9 CPU from the 2nd generation orAMD FX or Ryzen CPUOptical Disk Drive or internet connection for software downloadUSB 2.0 SCOPE OF DELIVERYSolid metal Microscopemechanical deskHD camera with metal housing, resolution 1280 x 7202 eyepieces: 5x and 16x3 objectives: 4x, 10x and 40x1 Barlow lens with 2x magnificationMicroscope toolsmechanical cross table5 prepared slides5 blank slidesDust cover and hard case

Available

€169.90*

BRESSER Microscope Biorit SE 1600x

Whether for school, university, or a hobby, the high-quality BRESSER Biorit SE 1600x Microscope is perfect for a wide range of applications. Thanks to the optional battery operation, it’s also portable. The adjustable LED lighting of the Biorit SE 1600x ensures ideal illumination, with separate controls for both transmitted and incident light, allowing you to dim each light independently. The microscope offers a magnification range of 40x to 1600x, and the 2x Barlow lens allows for additional zooming. Precise observations are supported by the coarse and fine focus adjustments. To protect your samples, the 40x objective lens is spring-loaded. The colour filter wheel makes it easy to highlight different details of your samples. With a modern design and a rear-facing revolving nosepiece, the microscope is extremely user-friendly. The Biorit SE 1600x also features a 360° rotatable monocular viewing head, and it can be powered via a computer or power bank (not included) using the included USB cable and power adapter. To help you get started right away, the microscope comes with 5 prepared slides and blank slides for your own samples. The smartphone camera holder lets you easily take photos and videos through the eyepiece. FEATURES Biological microscope suitable for beginners and advanced users Magnification: 40x – 1600x Three objectives in the revolving nosepiece: 4x, 10x, 40x Eyepieces: WF10x, WF20x 2x Barlow lens Eyepiece diameter: 23.2 mm Applications: Biology, Botany, Education LED incident and transmitted light Integrated dimmer Coarse and fine focus Comfortable monocular viewing with a 360° rotatable head Power supply: 3 AA batteries (not included), mains plug with USB cable SCOPE OF DELIVERY Microscope 5 prepared slides Blank slides Smartphone holder WF10x and WF20x eyepieces 2x Barlow lens 2 pipettes Protective cover Mains plug USB cable User manual

Available

€129.00*

BRESSER Erudit Basic Mono 40x-400x microscope (23)

The BRESSER Erudit Basic Mono is a versatile biological microscope. With its high quality optics it is the perfect choice for use in school or hobby. With battery powered LED lighting it can be used anywhere, e.g. for fieldwork or excursions. The microscope can be used on a great variety of subjects, for example thin sections, pond life, or blood smears. It is also a useful tool to look at parasites of pets and livestock (coccidia, helminths, skin and fur parasites).Three magnifications (40x, 100x, 400x) deliver good resolution to see small details. There is no need to work with immersion oil. The achromatic DIN objectives deliver sharp images with nice detail. The 40x objective is spring loaded to minimize the risk of damage to specimen or objective. The BRESSER Erudit Basic mono comes with a sturdy case for transport and storage, as well as with a smartphone holder for easy and convenient documentation of microscopic images and video.FEATURESType: Biological microscope, transmitted lightApplication: BiologyBattery powered long life LED light for mobile useCoarse and fine focus, coaxialCoaxial mechanical deskAdjustable Abbe condenser with diaphragm and filter holderComfortable eyepiece tube, 360° rotatableSturdy carry caseSPECIFICATIONSMagnifications: 40x, 100x, 400xAchromatic DIN-ObjectivesEyepiece barrel diameter 23,2mm, field number 18mmBattery powered LED lightSCOPE OF DELIVERYMicroscope body with LED lightWF 10x eyepieceAchromatic DIN-Objectives (4x, 10x, 40x)Abbe-Condenser N.A. 1,25, adjustable, with diaphragm and filter holderSmartphone holderCarry caseBox with preparations, empty slides and cover glasses

Available

€199.90*

NATIONAL GEOGRAPHIC Mikroscope-Set 40x-1024x USB (incl. Case and USB eyepiece)

This incident/transmitted light microscope is the ideal choice for entering the world of microscopy. Exclusive accessories such as dissecting instruments, transport case and an electronic eyepiece are already included. With a magnification of 40x-1024x, it is also suitable for school or hobby use. FEATURESBeginner's microscopeIncident and transmitted lightMagnification: 40-1024xUSB eyepiece: resolution 640x480 pixelsTransport case SYSTEM REQUIREMENTSWindows 10 or 11Intel i3, i5, i7 or i9 CPU from the 2nd generation orAMD FX or Ryzen CPUOptical Disk Drive or internet connection for software downloadUSB 2.0 SCOPE OF DELIVERYMicroscopeObjectives: 4x, 10x, 40xEyepieces: 10x, 16x1.6x barlow lensColor filter wheel with aperturesMicroscope utensils (tweezers, pipette)5 Slides, 20 cover glasses5 PreparationsYeast, sea salt, Brine shrimp eggs, Gum media, Hatchery, MicrocutUSB eyepiece with softwareDust coverTransport caseInstruction manual

Available

€149.90*

BRESSER Biorit ICD CS Stereo Microscope LED

Because of its large swing range and very large working distance the BRESSER Biorit ICD CS offers an excellent basis for various observations. It is the perfect choice for fine handiwork, e.g. soldering of SMD components.FEATURESstereo microscope with large swing range and high working distanceLED illumination/AC Powerworking distance (approx.): 230 mm / swing arm: 210 mmobject height: 70 mmSCOPE OF DELIVERYstereomicroscopedust cover2 pairs of eyepieces, WF 10x / WF 20x1 pair of rubber eyecupspower cable

Available

€369.90*

BRESSER Erudit Basic Bino 40x-400x Microscope

The BRESSER Erudit Basic Bino is a versatile biological microscope with binocular head. Observing with both eyes makes viewing more comfortable and ergonomic and improves detail recognition. With its high quality optics it is the perfect choice for use in school or hobby. With battery powered LED lighting it can be used anywhere, e.g. for fieldwork or excursions. The microscope can be used on a great variety of subjects, for example thin sections, pond life, or blood smears. It is also a useful tool to look at parasites of pets and livestock (e.g. coccidia, helminths, skin and fur parasites).Three magnifications (40x, 100x, 400x) deliver good resolution to see small details. There is no need to work with immersion oil. The achromatic DIN objectives deliver sharp images with nice detail. The 40x objective is spring loaded to minimize the risk of damage to specimen or objective. The BRESSER Erudit Basic bino comes with a sturdy case for transport and storage, as well as with a smartphone holder for easy and convenient documentation of microscopic images and video.FEATURESType: Biological microscope, transmitted light, binocular headApplication: BiologyBattery powered long life LED light for mobile useCoarse and fine focus, coaxialCoaxial mechanical deskAdjustable Abbe condenser with diaphragm and filter holderComfortable eyepiece tube, 360° rotatableSturdy carry caseSPECIFICATIONSMagnifications: 40x, 100x, 400xAchromatic DIN-ObjectivesEyepiece barrel diameter 23,2mm, field number 18mmBattery powered LED lightSCOPE OF DELIVERYMicroscope body with LED lightWF 10x eyepieceAchromatic DIN-Objectives (4x, 10x, 40x)Abbe-Condenser N.A. 1,25, adjustable, with diaphragm and filter holderSmartphone holderCarry caseBox with preparations, empty slides and cover glasses

Available

€259.90*

BRESSER Microscope Erudit DLX 40-600x Classroom set (15 pcs)

The class set, consisting of 15 devices, of the Erudit DLX microscope with a magnification of 40x to 600x includes ten identical devices. These robust and powerful microscopes are ideal for school use and allow all learners a detailed and practical observation of the micro-world. A perfect companion for illustrative and modern biology or science lessons.The microscope in detailThe BRESSER Erudit DLX is a high-quality study microscope for various applications, e.g. in school, in studies, or as a hobby. The dimmable LED lighting of the Erudit DLX and a centrable and height-adjustable condenser (with iris diaphragm and filter holder) allow for optimal illumination. The achromatic DIN objectives ensure very good imaging. The 40x- and 60x-objectives are spring-loaded to prevent damage to the specimen. The microscope features a 360° rotatable monocular eyepiece, coarse and fine focusing, as well as a coaxial stage with Nonius.FEATURES OF THE MICROSCOPEType: Biological microscopeEyepiece: MonocularComfortable view, 360° rotatable headApplications: Biology, Botany, EducationLighting: LED, adjustable condenserTarget group: Beginners, AdvancedCoaxial stageIntegrated dimmerEyepiece: 10x with pointerObjectives: 4x, 10x, 40x, 60xMagnification: 40x, 100x, 400x, 600xSCOPE OF DELIVERY OF THE MICROSCOPEMicroscopeEyepiece 10x4 objectives (4x, 10x, 40x, 60x)Abbe condenser with iris diaphragm and filter holderBlue filterDust coverPower supply

Available

€3,504.98*

BRESSER Erudit DLX 40-600x Microscope

The BRESSER Erudit DLX is a high-quality microscope for school, studies and hobby use. The LED illuminator and the height adjustable condenser (with diaphragm and filter holder) offer an optimal illumination. The achromatic DIN-objectives allow a very good image. The 40x and 100x objectives are resilient to save the preparation for damage. The microscope has a 360° rotatable monocular view coarse and fine focusing drive, and a coaxial mechanical desk with nonius. FEATURES Type: Biological microscope View: Monocular Comfortable view, 360° turnable head Application range: Biology, Botany, Education, Teaching Illumination: LED, adjustable condenser Level: Beginner, Intermediate coaxial mechanical stage Integrated dimmer Eyepiece: 10x with pointer Objectives: 4x, 10x, 40x, 60x Magnifications: 40x, 100x, 400x, 600x SCOPE OF DELIVERY Microscope body eyepiece 10x 4 objecitves (4x, 10x, 40x, 60x) Abbe condenser with field diaphragm and filter holder blue filter dust cover power supply

Available

€274.90*

BRESSER Science ADL 601 F LED 40-1000x Microscope

In the microscope's basis, there are a transmitted light LED illuminator (3 W) as well as the power supply and the continuous adjustable dimmer for transmitted light. The trinocular head allows to mount a SLR camera or a USB microscope camera with an optional adapter. The inclination of the eyepiece tubes is 30°. The fluorescence attachment includes a special LED wheel with four different lamps (green, blue, violett, ultraviolett), a filter wheel and a radiation shield. The LED lamps produces the exciting radiation in order to get fluorescence. Fluorescence microscopy is done e. g. in biology, medicine, microchemistry, geology, semiconductor production and environmental protection. The Science ADL 601F LED is an instrument with an excellent value for money. It has also the other features, which are typical for high-quality microscopes: fourfold objective nosepiece, lengthwise and cross moveable stage, coaxial focusing knobs (concerning fine drive: 200 µm / full turn), adjustment of eye relief, diopter adjustment and the phototube. Optional available, general accessories are the wide field eyepieces (WF10x, WF15x), the dividing eyepiece (WF10x), and dark field condensers (dry and oil). FEATURESType: biology MicroscopeView: TrinocularApplication range: Biology, Gemology, Botany, Education, Teaching, Entomology, Forensic, Research, Laboratory, Medical science, Pathology, Veterinary medicineIllumination: LEDLevel: Intermediate, ExpertWarranty: 2 years1.25 Abbe-condenser with iris diaphragm and filter holderIncl. adjustable mechanical stage Integr. dimmerAdjustable eye reliefDiopter adjustment SCOPE OF DELIVERYMicroscope4 DIN-objectives (PL 4x, PL 10x, PL 100x oil, PL-FL 40x)2x 10x eyepieces 1.25 Abbe-condenser with iris diaphragm and filter holderFluorescence attachment with LED wheel (green, blue, violett, ultraviolett) and respective emission filtersImmersion oilFull Koehler illumination for transmitted light

Available

€4,199.90*

BRESSER Analyth STR 10x - 60x Stereo Reflected and Transmitted Light Microscope

The BRESSER Analyth STR 10x - 60x Stereo Reflected and Transmitted Light Microscope features 3 different objective magnifications (1x, 2x, 3x), which can be easily switched by rotating the objective. This allows for magnifications of 10x, 20x, 30x, 40x and 60x. Two eyepiece pairs with 10x and 20x magnification are included. They are secured with a small screw to prevent them from falling out. The stereo design provides a particularly vivid and three-dimensional view of structured objects. The low initial magnification of 10x is especially suitable for working with children. This allows objects up to 20 mm in size to be viewed in full. The Analyth STR is therefore extremely versatile. It is suitable for insects, plants, minerals and much more, and can be used for hobbies, in schools and in professional settings. Of course, the stereo microscope can also be used for quality control, in horticulture and agriculture, for water analysis and many other applications. Interpupillary distance and dioptre adjustment can be set individually. The eyepieces offer a large field of view and can be fitted with rubber eyecups. The microscope can be powered either via the mains adapter or with 3 AA batteries (not included). Thanks to the practical carrying handle, it can be used on the go – for example, in the garden or during field trips. FEATURES Microscope with 5 magnifications: 10x, 20x, 40x, 60x Wide-field eyepieces with rubber eyecups and 20 mm field of view Bright, energy-efficient LED illumination, adjustable angle Illumination for reflected and transmitted light can be switched separately Dimmer via membrane buttons with status indicator Two stage plates (black/white and frosted glass), stage clips SCOPE OF DELIVERY Microscope with 3 objective pairs: 1x, 2x, 3x Metal stand with LED illumination, power supply and battery compartment 2 eyepiece pairs (10x, 20x) 1 pair of rubber eyecups Glass stage plate Plastic stage plate (black/white) Dust cover Instruction manual

Available

€278.90*

BRESSER Microscope Science TFM-201 Bino

The New BRESSER Science TFM-201 is a binocular microsscope, which is equipped with semiplan objectives. The WF 10x eyepieces offer a large visual field of 20mm. The interpupillary distance can be adjusted from ca. 55mm to 75mm. Dioptre adjustments are possible with both eyepieces.The Köhler illumination is regulable with the built-in luminous-field diaphragm and the vertically and horizontally adjustable Abbe condenser (numerical aperture 1.25, with iris diaphragm). An imprint of the different possible magnifications on the condenser makes the adjustment of the iris diaphragm very fast and precise.Coaxial pinions drive the stage and focus which enables ergonomic operation of the microscope.SCOPE OF DELIVERYMicroscope with integrated LED illuminationsemiplan objectives (4x, 10x, 40x, 100x oil)2x eyepieces (WF 10x)Immersion oilDust coverMains adapterManual

Available

€759.00* €799.90* (5.11% saved)