Pipette Controllers allow you to quickly fill and release accurate volumes. They attach to a pipette, which can be glass or plastic, that’s holding the liquid or volume itself. The controller’s job is to be sure you’re dispensing the correct amounts of liquid at the right times, whether you’re doing research in a lab or in a medical setting. This kind of precision is crucial to getting the exact measurements of chemicals and other liquids.
Machines that remove heat from a liquid through a vapor-compression or absorption refrigeration cycle are called chillers. The refrigeration cycle chiller creates waste heat that, when removed, results in greater efficiency. To accomplish this, liquid can be circulated through a heat exchanger, thus cooling the equipment. When it comes to vapor-compression chillers, they require compressors which are mechanical devices that can be powered by electric motors, steam, or gas turbines. These chillers utilize four basic types of compression: reciprocating compression, scroll compression, screw-driven compression, and centrifugal compression. Evaporative cooling heat rejection allows their coefficients-of-performance to be very high.
Before we discuss digital microscope cameras, let’s briefly review what distinguishes digital microscopes from other types of microscopes. A digital microscope is a variation of a traditional optical microscope that uses optics and a digital camera to output an image to a monitor via computer software. They usually have their own built-in LED light source, and since the image is focused on the digital circuit, the entire system is designed for the monitor image. There is no provision to observe the sample directly through an eyepiece, as you would find on an optical microscope, and therefore the optics for the human eye are omitted. Digital microscopes are commonly low priced commercial microscopes designed to be used with a computer.
Graduated Cylinders and Beakers are both common pieces of laboratory equipment. A Graduated Cylinder has a narrow cylindrical shape with each marked line showing the volume of liquid being measured. While they are generally more accurate and precise than laboratory flasks and beakers, they should not be used to perform volumetric analysis. They are also sometimes used to measure the volume of a solid indirectly by measuring the displacement of a liquid. Whatever your use may be, these varieties can handle the task.
Water aspirators were once a staple in many biology and chemistry labs but are becoming an increasingly uncommon sight as they are being replaced with vacuum pump aspirators. Water aspirators are designed to connect to a lab faucet and allow water to flow through a tube inside of the aspirator, thereby creating a vacuum. While this type of aspirator is inexpensive and has done a decent job for a very long time, you may want to think about upgrading to a vacuum pump aspirator. Why? Let’s take a close look at the environmental impact, performance, and lifetime cost of a water aspirator as compared to a vacuum pump.
Liquid handling is one of the core functions of any laboratory, and pipetting is one of the most common functions performed in labs. It is both a measuring technique and the conveyance method used for transporting small volumes of fluid. Whether liquids are being moved on a small scale, one sample at a time, or on a larger scale, with dozens of samples at a time, there is a need to transfer liquids cleanly and accurately from one vessel to another.
Laboratories experimenting and studying biological sciences have a near-universal need for liquid handling. Those that pipette hundreds of samples a day can start to see problems like inaccurate transfers because of repetitive motion injuries with their liquid handlers. There are, however, some techniques you can employ and changes you can make to reduce the chances of repetitive stress injuries and to continue to achieve the high standards you expect in your lab while using pipettes and single or multiple channel pipettors.
A critical piece of laboratory equipment, a laboratory centrifuge is a motor-driven device that spins liquid samples at very fast speeds around a central point. The concept behind the centrifuge is that it relies on the sedimentation principle. By spinning so quickly and forcing substances inward, which is called centripetal acceleration, the substances of greater and lesser density will separate, causing sedimentation to occur. This separation allows for isolation, study, and research of specific substances. A mini-centrifuge, also called a microcentrifuge, works in the same way, but is capable of working with much smaller samples, using micro-tubes that range in size from 0.2 ml to 2.0 ml. Its compact design and smaller footprint makes it convenient to use on the workbench, while also economizing on workspace.
Laboratory baths are available with two key methods of heating and cooling. There are general purpose water baths, which work with heated water, and circulating baths for experiments and research that require temperatures above the boiling point and below the freezing point, serving both heating and cooling needs. Read here for a guide to the several types of water and circulating baths:
When you think of the most essential equipment in a laboratory, those items that promote safety are at the top of the list. Autoclaves, which use high pressure steam to sterilize liquid, glass, and biohazards; micro bead sterilizers, which easily eliminate bacteria from small lab and research tools using a heated glass bead technology; and chemical safety cabinets, which provide a vented environment for chemicals--all three of these pieces of laboratory equipment are designed to promote safe and effective lab work. Here is more information on each type of equipment piece so that you can make the best decisions in your laboratory purchases.
Thermocyclers, or thermal cyclers, are instruments used to amplify DNA and RNA samples by the polymerase chain reaction (PCR). The thermocycler raises and lowers the temperature of the samples in a holding block in discrete, pre-programmed steps, allowing for denaturation and reannealing of samples with various reagents. Amplified genetic material can be used in many downstream applications such as cloning, sequencing, expression analysis, and genotyping.
Analytical and Top Loading Balances: Our Precisa analytical balances and top loading balances couple premium workmanship of robust die-cast aluminum housing with the finest engineering materials, providing excellent protection against mechanical and electrical interference.