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New Products

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The VELP ®  Scientifica ZX4 Advanced Infrared Vortex Mixer, shown, meets the multiple needs of laboratories with an infrared touch sensor, continuous operating mode, and adjustable stirring speeds up to 3000 rpm. TheVELP ®  Scientifica ARE Hot Plate Stirrer with Aluminum Top offers optimal heat transfer with premium homogeneity and is an excellent option for industrial and lab applications up to 15 liters and 370°C (698°F). The VELP ® Scientifica AREX Ceramic-Coated Stirring Hot Plate ensures precise thermoregulation and a high degree of reliability and safety. With a ceramic-coated top, it also provides exceptional chemical resistance. For a low-cost method of measuring disinfection efficiency and contamination levels, take a look at the new GreenLight ® Environmental Bacterial Count Systems. The systems are ideal for monitoring wastewater discharge for disinfection limits in NPDES permits, drinking water plant disinfection, and bacteria in water at beaches. The systems measure ...

Lab Safety: Pumping Flammable Liquids

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In terms of lab safety, pumping flammable liquids can create hazardous conditions. Both fire and explosions can result if safe handling of materials is not adhered to by lab workers, students, and researchers. Examples of liquids that are flammable include ethyl ether, acetone, and benzene. Combustible liquids include acetic acid, formic acid, and formalin. When flammable and combustible liquids flow, they may create a buildup of static electricity. To reduce the hazard levels, follow these five general safety guidelines. 1)  Always use a metallic pump with air-driven or explosion-proof (XPRF) motor. 2)  Make sure all components are metal. Plastic can build up static charges and cannot be grounded. 3)  Electrically ground the operator and all pump components including motor (even if air-driven), inlet and discharge piping, hose clamps, holding tank, and receiving tank. 4)  Avoid splashing liquids—splashing generates static electricity that can result in ignition or explos...

Desecha Correctamente los Medicamentos Caducos

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Retrieving Water Samples: Lab Equipment for the Treatment Plant or the Field

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If you collect environmental water samples for testing for dissolved minerals, chemicals, or miscellaneous contaminants, you will need sampling equipment that meets your specific needs. Two common types of samples are grab samples and composite samples. Whether you are sampling in a treatment plant or out in the field, some of the items below will help you retrieve your samples. To ensure accurate sampling results, your liquid sampler should be made from inert materials to prevent chemical incompatibility. It's also best to select a liquid sampler in various lengths. For open water sampling, choose from dipper sampling systems or dippers and bailers with replaceable or removable cups, in either plastic, PTFE, or stainless steel options. For hard-to-reach areas, select portable automatic peristaltic pump sampler systems that can float and be programmed to EPA requirements. Types of Water Sampling Equipment Bailers:  hollow tube apparatus used to retrieve groundwater sa...

Laboratory Equipment: A Guide to Mixer Selection

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When choosing laboratory equipment such as a mixer, several variables should be considered specific to your application. For mixers, gather the follow information: Stir-Pak High-speed, Low-Torque Mixer System (23-2300rpm, 115 VAC) What container capacity do you need? What liquid viscosity? What are your torque requirements? What are your horsepower requirements? What rotational speed or RPM do you need? What diameter for the mixing propeller? What are your requirements for duty cycle? What will be the source of your power supply? Laboratory Mixers  are available with permanent magnet, universal, or air-drive motors. Choose different mixer mounts for mounting on tanks or stands. A variety of impellers and paddles lend versatility to the mixer you select. Industrial Mixers  are available with electric- or air-driven motors for up to 1-hp. Fixed- or variable-speed and direct- or gear-driven options are available. Specialty Mixers include: Sanitary Mixers  for all app...