Kern OBN 158 phase contrast microscope, trinocular, Infinity Plan, 40x to 1,000x, 20 W halogen
€2,628.00
% Manufacturer's RRP: €2,920.00 10% below manufacturer's RRP
- Trinocular phase contrast microscope with Infinity-Plan optics and Siedentopf tube
- Five objectives: 4x, PH 10x, PH 20x, PH 40x, PH 100x (oil), total magnification 40x to 1,000x
- PH universal rotating condenser with 5-position condenser wheel, aperture 1.25
- Köhler illumination with field diaphragm, dimmable 20 W halogen lamp (Philips)
- Large mechanical stage, fine focus 0.002 mm, beam splitter ratio 0:100 and 80:20
- Centring eyepiece, dust cover and eyecups included in the scope of delivery
Product information "Kern OBN 158 phase contrast microscope, trinocular, Infinity Plan, 40x to 1,000x, 20 W halogen"
The Kern OBN 158 is a trinocular phase contrast microscope with Infinity-Plan optics and 20 W halogen illumination. Kern supplies it as a pre-configured unit: a five-position condenser wheel, a phase contrast condenser and four phase contrast objectives are already fitted. The halogen lamp is manufactured by Philips and is dimmable. As samples, Kern names translucent, thin, low-contrast and demanding specimens such as living mammalian cells, bacteria and tissue.
Phase contrast equipment
The PH universal rotating condenser has a condenser wheel with five positions. It can be centred, has an aperture of 1.25 and an aperture diaphragm. Five objectives are mounted on the nosepiece: 4x (Infinity Plan, aperture 0.11), PH 10x (0.25), PH 20x (0.45, spring-loaded), PH 40x (0.65, spring-loaded) and PH 100x (1.25, oil). All of them carry an anti-fungus coating. With the HWF 10x eyepieces, the total magnification ranges from 40x to 1,000x. According to the data sheet, the field of view measures 0.2 to 5 mm. In addition to phase contrast, bright field is listed as a contrast method. Dark field, polarisation and fluorescence are optional. A centring eyepiece for phase contrast adjustment is included in the scope of delivery.
Köhler illumination with halogen light
The illumination operates according to the Köhler principle with an adjustable field diaphragm. The halogen lamp has a power rating of 20 W and is dimmable; filters are available. The desktop power supply is detachable and has a C14 IEC connector. It operates at 100 to 240 V at 50/60 Hz and 1.5 A; the microscope is supplied with 12 V at 4 A. The barrel plug is positive on the inside, with an outer diameter of 5.5 mm, an inner diameter of 2.5 mm and a length of 9.5 mm. The Euro plug is included in the delivery; a UK adapter is optional.
Tube, stage and focus
The Siedentopf tube is trinocular, inclined at 30° and rotatable through 360°. According to the data sheet, the beam splitter ratio is 0:100 and 80:20. The interpupillary distance ranges from 50 to 75 mm, and the dioptre adjustment operates on both sides from -5 to +5. The very large mechanical stage is operated with an ergonomic coaxial coarse and fine focus control that works from both sides. The fine focus mechanism operates in increments of 0.002 mm, and torque control is provided. A C-Mount adapter is required to connect a camera. The microscope measures 390 x 200 x 400 mm and has a net weight of approx. 10 kg.
Typical applications
- Haematology, urology, gynaecology and dermatology: unstained cells
- Microbiology, parasitology and immunology
- Pathology, oncology and entomology
- Water analysis, sewage treatment works and breweries
- Veterinary practices, as well as inpatient and laboratory medical facilities, public health authorities and universities
Technical details
| Optical system | Infinity |
| Tube | Trinocular, Siedentopf, inclined at 30°, rotatable through 360°, interpupillary distance 50 to 75 mm, dioptre adjustment on both sides -5 to +5 |
| Beam splitter ratio | 0:100 and 80:20 |
| Eyepiece | HWF 10x, field of view 20 mm, mounting diameter 23.2 mm, anti-fungus coating |
| Objectives | Infinity Plan: 4x / 0.11, PH 10x / 0.25, PH 20x / 0.45 (spring-loaded), PH 40x / 0.65 (spring-loaded), PH 100x / 1.25 (oil), anti-fungus coating |
| Objective nosepiece | 5 places |
| Total magnification | 40x to 1,000x |
| Field of view | 0.2 mm to 5 mm |
| Contrast methods | Phase contrast and bright field; dark field, polarisation, fluorescence (optional) |
| Condenser | PH universal rotary condenser with 5-position condenser wheel, aperture 1.25, aperture diaphragm, centrable |
| Stage | Very large mechanical stage |
| Focusing | Coaxial coarse and fine focus, on both sides, fine focus 0.002 mm, torque control |
| Illumination | Halogen 20 W (Philips), dimmable, Köhler illumination with field diaphragm, filters available |
| Camera connection | C-Mount adapter required |
| Power supply | Desktop power supply (detachable, IEC connector C14) 100 to 240 V AC, 50/60 Hz, 1.5 A; unit 12 V / 4 A |
| Mains plug | Euro included in the scope of delivery; UK adapter optional |
| Dimensions (W x D x H) | 390 x 200 x 400 mm |
| Net weight | approx. 10 kg |
| Storage temperature | -5 °C to 40 °C |
| Labelling | CE |
| Warranty (manufacturer) | 36 months according to Kern, excluding wear parts |
Scope of delivery
- OBN 158 microscope with trinocular Siedentopf tube
- HWF 10x eyepieces
- Objectives: 4x, PH 10x, PH 20x, PH 40x, PH 100x
- Phase contrast condenser with condenser wheel
- Centring eyepiece for phase contrast adjustment
- Desktop power supply with Euro plug
- Dust cover
- Eyecups
- Multilingual operating instructions
Warranty
According to Kern & Sohn, this microscope comes with a 3-year warranty. Kern grants 3 years on products with a list price of €500 or more and 2 years on products below that and on components; wear parts such as batteries and rechargeable batteries are excluded. Warranty repairs are carried out by Kern or by a Kern dealer.
Downloads
Operating instructions Kern OBN-15 (PDF)Regulatory information
As an electrical device, the microscope falls under the ElektroG. The manufacturer Kern & Sohn GmbH is registered under the WEEE registration number DE 80821200. How to return old appliances is described on the page Environment and disposal.
Individual requirements and procurement service
For the OBN series, Kern lists as accessories a swing-out condenser, additional eyepieces, objectives, colour filters, phase contrast units, a dark field condenser, a simple polarisation unit, a Butterfly tube and complete fluorescence units. They are also available. Enquiries are handled via our procurement service.