Schuett Colony Counters
Schuett Count Colony Counter, Manual
Usually, the most time-consuming part in microbial analysis is counting Petri dishes. The Schuett Count colony counter was designed to facilitate this task considerably and will become essential equipment in your microbiological laboratory. Easy, rapid and reliable counting of bacterial colonies is no longer trouble when using this device.The Schuett Count may be used for a large variety of applications where microbial checks are needed:
- in bacteriology
- in dairy and beverage industry
- in Medical Test Centres
- in Quality Control for water treatment plants
- in food and environmental analytics
The Schuett Count colony counter is suitable for reliable and efficient counting of:
- bacterial colonies growing on nutrient agar in Petri dishes of 60 to 150 mm diameter
- bacterial colonies growing on filter disks/agar or nutrient disks
- phage plaques growing on agar
- transparent medium or filter disks/agar: two special adapters for inserting Petri dishes allow for ideal height positioning of the dishes in order to reach optimum lateral illumination.
Features:
- three modes of illumination:
- from below: White colonies growing in and on clear agar are illuminated from below in order to avoid reflections. The glarefree illumination facilitates the counting of the colonies especially at the rim of the Petri dish. Differentiation between colonies
and air bubbles inside the agar is possible without any difficulties. Furthermore, the light source allows for the correct identification of mucus secreting colonies and observing the decrease of turbidity caused by calcium carbonate inside the agar when working with acid producing microorganisms.
- from the side: For colonies growing on filter disks and on non-transparent agar, the illumination from the side has been developed. Transparent colonies are mostly
3-dimensional. Accurate colour reproduction of the colonies in the bright and dark
field is reached, so that an incredible ease of work is reached for all agar media where a colour differentiation of various colony colours is requested. The direct lateral illumination in conjunction with the white light spectrum of the LEDs lights up,
colonies than may hardly be seen in the reflecting light of fluorescent lamps.
- from top (optional): For colonies with a very low contrast to the background and colonies growing on dark agar, we optionally offer a LED-top light lamp for connection to the standard Schuett Count manual colony counter. The top light lamp is equipped with a flexible gooseneck and illuminates the complete Petri dish. It is especially suggested for counting very small colonies.
- can accommodate petri dishes or nutrient disks with
- 90 mm. diameter
- 60 mm or Ø 150 mm (optional) diameter
- high transparency of colonies reached by LED-light source, practically no heat transferred to the sample
- light intensity, pressure sensitivity for count and acoustical counting signal adjustable
- average determination: For serial tests, the Schuett Count may show the average by push of a button. Up to 99 values with a total of max. 32,500 colonies may be evaluated.
- data transfer via USB to the PC: Schuett Count provides a USBinterface, which may transfer the counting result directly to an Excel-chart or field of the analysis report.
- ergonomically optimized: The inclination of the instrument´s working surface is optimized for the operator, so that the Petri dish is positioned as horizontally as possible without forcing the user to bend over the instrument. The convenient width of the Schuett Count allows for positioning both hands onto the instrument without blocking additional working space. These construction features support easy and comfortable work. Due to the compact construction, the Schuett Count only requires little space. The housing is easy to clean.
- the power supply provides an automatic line/mains supply identification 100-240 VAC compensating for short voltage breakdowns
Operation:
The counter is initiated by marking the colonies with an ordinary felt-tip marker pen. The Petri dish holder is pressure sensitive. Already a gentle touch of the Petri dish with the pen generates a count. The result is clearly shown on a large 4-digit LED-display
(0-9999) with reset feature. A well-organized and easy to clean keypad allows for nearly
infinite, reproducible adjustment (for each operator) of pressure sensitivity, light intensity and acoustical count signal. The corresponding level of sensitivity is shown in the digital display. The count signal acoustically confirms the count of a colony.
Correction of counting mistakes is easily possible by adding or subtracting with the arrow keys. When counting high numbers of colonies, the optional Wolffhügeldisk facilitates the segmenting in the bright or the dark field. A black contrast disk for working in dark fields is included in the delivery extent.
Illumination of colonies:
State-of-the-art light technology allows for circularly illuminating the colonies from the side resulting in a transparency and differentiation of the colonies never possible before.
There is no stray light or blinding, which is usually a problem when using fluorescent lamps In addition, the dimming feature allows for adjusting the light intensity to the needs of the user and accounts for surrounding light inside the lab.
A natural colour reproduction facilitates differentiation between various coloured cultures growing on chromogenic medium and filter/nutrient disks. The state-of-the-art illumination provides such a contrast that agar plates, with colonies growing on and inside the agar may easily be counted.
As a result, eyestrain is reduced to a minimum allowing for extended periods of uninterrupted work. The entire illumination consumes only 3 Watts producing practically
no heat. Choose individually the ideal mode of illumination according to the medium.
Use the bright background for dark colonies or the black contrast disk for light colonies.
Technical specifications:
- Dimensions (w x h x d): 260 x 130 x 250 mm
- Height with gooseneck magnifying glass/top light lamp approx. 300 mm
- Magnification: 3x or 8x (optional)
- LED-Display: 4-digit (0-9999)
- Size of Petri dish (Ø) 50-60, 90-100 or 140-150 mm (optional)
- Reset/down counts/correction of counting mistakes: yes
- Pressure sensitivity: yes (adjustable)
- Light intensity: LED-lighting technology (dimmable)
- Count signal (buzzer): yes (adjustable)
- Weight: 1.5 kg
- Protection class: I
- IP: 20
- Power supply: 100-240 V / 50-60 Hz
- Power input: 5 V DC, 2100 mA; 20 W
Ordering information:
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Cat.-No.
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Description
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3.081 502
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Schuett count colony counter, 100-240 V, incl. felt-tip marker pen, adapter for Petri dishes with Ø 90 mm and contrast-disk (black)
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Accessories:
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3.081 602
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Magnifying glass, 3x for 3-fold magnification of the complete Petri dish incl. gooseneck support individually adjustable, Ø 100 mm.
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3.081 612
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Magnifying glass, 8x for 8-fold magnification of the complete Petri dish incl. gooseneck support individually adjustable, Ø 30 mm
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3.081 702
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LED-top light lamp for optimim illumination of cultures, incl. gooseneck support
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3.081 802
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Adapter for Petri dishes with Ø 50-60 mm for central positioning
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3.081 812
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Adapter for Petri dishes with Ø 140-150 mm for central positioning
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3.081 902
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Spiral-Plater-disk, black/white for counting with Spiral-Plater method
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3.081 912
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Wolffhügel-disk, black/white for sectoral counting of Petri dish
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3.081 922
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Counting needle for counting by tap of the colony
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3.081 932
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Felt-tip marker pen (water-resistent)
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3.081 992
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USB connection cable for PC
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