替代品

Aluminium ring with a blade for determining the surface tension of liquids. Includes a hook and three threads for suspension from a dynamometer. The tear-off force in liquids is easy to determine, which is why students can conduct the experiment ... 更多

Metallophone for demonstrating a C major scale from c² to g². Note labels, frequencies and frequency ratios are printed on the instrument. With striking hammer. Dimensions: approx. 320x210 mm² Weight: approx. 510 g 更多

Lenses made of high-quality optical glass. Breakage and impact-resistant, set in a slide with magnetic base. Dimensions: 70x70 mm² Lens diameter: 36 mm f = +300 mm 更多

Lenses made of high-quality optical glass. Breakage and impact-resistant, set in a slide with magnetic base. Dimensions: 70x70 mm² Lens diameter: 36 mm f = +100 mm 更多

Lenses made of high-quality optical glass. Breakage and impact-resistant, set in a slide with magnetic base. Dimensions: 70x70 mm² Lens diameter: 36 mm f = +50 mm 更多

Lenses made of high-quality optical glass. Breakage and impact-resistant, set in a slide with magnetic base. Dimensions: 70x70 mm² Lens diameter: 36 mm f = -100 mm 更多

Object holder with magnetic base to accommodate optical apertures in slides (50x50 mm2), e.g. single slit N (U8470870) or triple/quintuple slit N (U8478110). 更多

Metal rail with millimetre scale and guide slots for accommodating optical components on a magnetic base. Dimensions: 400x75x10 mm³ Weight: 230 g approx. 更多

Single slit slide for mounting in N-model object holder or in the filter slot of the N-model parallel light optical lamp to use in optical experiments requiring a tight single beam. Dimensions: 50x50 mm² 更多

Optical bench made of black anodised aluminium profile with printed millimetre scale. Cross-section: 70x30 mm² approx. Length: 500 mm Weight: 0,6 kg 更多

Optical bench made of black anodised aluminium profile with printed millimetre scale. Cross-section: 70x30 mm² approx. Length: 1000 mm Weight: 1,2 kg 更多

Optical rider for K-model optical benches (U8475337 and U8475336). With two clamps for diaphragms from the Kröncke optical system or for plates up to 2 mm thick. Dimensions: approx. 40x50x35 mm³ Weight: approx. 70 g 更多

Halogen lamp in cylindrical housing attached to diaphragm screen (100x100 mm²) for mounting on K-model optical riders (U8475350). The filament can be aligned horizontally or vertically. Halogen lamp: 12 V, 20 W Terminals: 4 mm safety sockets ... 更多

Simple transformer for student exercises. Short circuit proof, with connection leads and two cascadable 4 mm safety plugs. Safety transformer conforming to EN 61558-2-6 Safe isolation between power supply and output circuits Specifications ... 更多

适用于学生练习用的简易变压器，具有短路保护功能，包含连接导线 和两个可堆叠的4mm安全插头。 • 安全特低电压（SELV）和功能特低电压（FeLV） • 安全变压器符合EN 61558-2-6 • 电源和输出电路之间的安全隔离 输出： 12 V AC，最大2 A 规格： 约 110 x 95 x 65 mm3 重量： 约 0.64 kg 更多

Tough clamp for diaphragms, filters, diffraction objects and other objects in a slide frame. On diaphragm screen 100x100 mm². Clamping range: 0.2 – 4 mm Dimensions: 100x100 mm² Round opening: 38 mm dia. 更多

Lenses made of high-grade optical glass. Shock-proof and crack-proof installation in optical diaphragm (100x100 mm²). With focal length specification. Dimensions: 100x100 mm² Lens diameter: 32 mm 更多

Lenses made of high-grade optical glass. Shock-proof and crack-proof installation in optical diaphragm (100x100 mm²). With focal length specification. Dimensions: 100x100 mm² Lens diameter: 32 mm 更多

Lenses made of high-grade optical glass. Shock-proof and crack-proof installation in optical diaphragm (100x100 mm²). With focal length specification. Dimensions: 100x100 mm² Lens diameter: 32 mm 更多

Lenses made of high-grade optical glass. Shock-proof and crack-proof installation in optical diaphragm (100x100 mm²). With focal length specification. Dimensions: 100x100 mm² Lens diameter: 32 mm 更多

Lenses made of high-grade optical glass. Shock-proof and crack-proof installation in optical diaphragm (100x100 mm²). With focal length specification. Dimensions: 100x100 mm² Lens diameter: 32 mm 更多

Lenses made of high-grade optical glass. Shock-proof and crack-proof installation in optical diaphragm (100x100 mm²). With focal length specification. Dimensions: 100x100 mm² Lens diameter: 32 mm 更多

Lenses made of high-grade optical glass. Shock-proof and crack-proof installation in optical diaphragm (100x100 mm²). With focal length specification. Dimensions: 100x100 mm² Lens diameter: 32 mm 更多

Fresnel mirror with holder for use on K-model optical benches (U8475260, U8475240 or U8475230). Two mutually inclined surface-coated mirrors are bonded to a common metal plate. A knurled screw at the rear can be used to adjust the angle between ... 更多

Photographic diffraction object in a slide frame. Single slit widths: 0.075 / 0.15 / 0.4 mm Double slit width: 0.1 Double slit spacing: 0.5 mm Dimensions: 50x50 mm² 更多