Encuentre aquí la probeta graduada de vidrio o plástico adecuada para sus aplicaciones en el laboratorio.
Las probetas graduadas y las probetas con tapón BRAND ofrecen un máximo nivel de exactitud. El estricto control estadístico asegura el elevado nivel de calidad. Todas las probetas graduadas BLAUBRAND® se suministran con número de lote y un certificado de lote incluido por unidad de embalaje original. Sobre demanda, también se pueden suministrar con certificado individual o certificado de calibrado DAkkS.
Las probetas graduadas de BRAND se fabrican a partir de plásticos de alta calidad, muy resistentes a productos químicos. La conicidad extremadamente reducida del cilindro permite una graduación de la escala regular. - Elevada estabilidad estructural gracias al borde reforzado - Pico funcional, por lo tanto sin goteo posterior - Estabilidad mejorada gracias al pie hexagonal con botones de soporte - Excelente legibilidad de la graduación - Casi irrompibles.
Las probetas graduadas clase A se caracterizan por una muy baja dispersión de los valores medidos, como se muestra en el ejemplo gráfico de arriba. Se alcanzan los límites de error de la clase A incluso tras 20 lavados y 10 esterilizaciones en autoclave. (La norma DIN 12 681 exige: 10 lavados y 3 esterilizaciones en autoclave.)
Due to the reduced height low form graduated cylinders have an improved stability compared to tall form graduated cylinders. With identical volumes the inner diameter and, subsequently, the error limits of graduated cylinders of low form increase. All graduated cylinders with low form refer to Class B (SILBERBRAND) of DIN EN ISO 4788. Graduated cylinders with tall form can meet error limits of Class A (BLAUBRAND) or Class B (SILBERBRAND).
Mixing cylinders can be used in the preparation of standard solutions and dilutions, the same as volumetric flasks. Insert amount of substance or standard solution concentrate, fill mixing cylinder with solvent about half, swirl mixing cylinder to dissolve and mix, fill mixing cylinder with water to just below the ring mark, top up remaining volume until meniscus is excatly at ring mark by using a wash bottle or pipette, close mixing cylinder and shake upside down to mix thouroughly. Carefully remove closure to vent any pressure, taking care to avoid any aerosols that may have been generated.
'TC, In': The contained quantity of liquid corresponds exactly to the capacity indicated on the instrument.
Blue and white enamel are printed on the outer surface and provide a high contrast and an optimal combination of chemical resistance and legibility for BLAUBRAND (cl. A) and SILBERBRAND (cl. B) graduated or mixing cylinder. Amber diffusion stain is used for BLAUBRAND®-ETERNA (cl. A) and SILBERBRAND-ETERNA (cl. B) graduated or mixing cylinder. This color diffuses into the glass surface and can therefore only be removed by abrasion or glass corrosion.
Every BLAUBRAND® and SILBERBRAND graduated or mixing cylinder is labeled with nominal capacity, unit symbol (ml), error limit (± _ ml), calibration temperature (20 °C), calibration type (In), Class (A or B), country of origin (Germany), manufacturer's trademark (BLAUBRAND or SILBERBRAND) or company's name or logo (BRAND) as well as the type of glass (Boro 3.3), the standard referring to (ISO or ISO 4788) and inscription ETERNA (if applicable). Every BLAUBRAND® graduated or mixing cylinder is labeled additionally with DE-M marking and batch or serial number as well as in case of USP volumetric flasks the inscription USP.
Every BLAUBRAND® and SILBERBRAND graduated or mixing cylinder is labeled with nominal capacity, unit symbol (ml), error limit (± _ ml), calibration temperature (20 °C), calibration type (In), Class (A or B), country of origin (Germany), manufacturer's trademark (BLAUBRAND or SILBERBRAND) or company's name or logo (BRAND) as well as the type of glass (Boro 3.3), the standard referring to (ISO or ISO 4788) and inscription ETERNA (if applicable). Every BLAUBRAND® graduated or mixing cylinder is labeled additionally with DE-M marking and batch or serial number as well as in case of USP volumetric flasks the inscription USP.
When two liquids are mixed, a volume change may occur due to the change of properties of the mixture in comparison to the individual liquids.
Handling of graduated cylinders: Fill with liquid. Set meniscus to required mark and be sure that the wall of the cylinder is not wetted above the mark. The indicated volume is the amount of liquid contained.
Class A stands for highest quality grade volumetric flasks in accordance to DIN EN ISO 1042 and, therefore, for tight error limits (BLAUBRAND®). Class B volumetric flasks (SILBERBRAND) have larger error limits than Class A volumetric flasks, usually twice as much.