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lab supplies

  1. 504955 Luer to Tubing Coupler Kit Pictures
    May 01, 2013
    The barbed tubing assortment kit contains over 250 items. All the items are pictured on a grid below. The darker lines in the image grid represent centimeters, and the smaller ones are 2.5 mm apart. Luer to Tubing Coupler Assortment Kit P/N 504955 (Nylon)  
  2. Microscope Basics
    April 29, 2013
    Microscopes are a standard laboratory tool, but purchasing the right microscope for a particular application can be a challenge. First, consider how you will use the instrument. Are you looking at slides, dissecting a small animal or performing a surgery? (The application dictates the necessary working distance and power of magnification.) What kind of a stand will you be using? (Boom stand, articulating arm or post stand) Will the microscope be used in a classroom setting? (A trinocular scope offers the option of including a camera.) Will you need a camera?
  3. Understanding Microscope Objectives
    April 29, 2013
    NOTE: For an introduction to microscopes, see Microscope Basics. A variety of microscope objectives are available. All objectives use lenses to focus light. Light is broken down into various wavelengths (colors) as it travels through a lens. The various wavelengths have different focal points. That means that red, green and blue appears to focus at different points. This is called chromatic aberration. Spherical aberrations are focal mismatches caused by the shape of the lens. Quality lenses are designed correct for chromatic and spherical aberration to bring the primary colors to a common focal point. These terms may help you determine the best objective for your application: Achromatic objectives–This objective brings red and blue light to a common focus, and is corrected for spherical aberrations for green. It is excellent for black and white viewing. If an objective i
  4. Adjusting a Microscope
    April 29, 2013
    These instructions describe how to properly focus a binocular microscope. Turn on the lamp and adjust its intensity. Adjust the interpupilary distance so that the two circles of light merge into one. Place a sample on the stage. Select the 10X objective and look through the right eyepiece only. Use the coarse and fine focus control knobs to adjust the focus of the sample. When the sample is clearly visible, use only your left eye. Do NOT adjust the focus knobs. Instead, adjust the diopter on the left eyepiece until the sample comes clearly into view. The image should be clear with both eyes open. Choose the desired objective. You may need to adjust the fine focus a little.   Camera/Microscope Configuration Chart
  5. 14011 Luer Valve Assortment Kit Pictures
    April 26, 2013
    The 14011 barbed tubing assortment kit contains over 250 items. All the items are pictured on a grid below. The darker lines in the image grid represent centimeters, and the smaller ones are 2.5mm apart.
  6. What's the Difference Between a 3-way and 4-way Stopcock?
    April 26, 2013
    A 4-way stopcock allows for 360° of rotation and has the states (shown below) for each of the four available positions. A 3-way stopcock has only three positions and has the first three states shown below. In the first state, liquid flows between points A and B.In the second, it flows between points A and C.In the third, it flows between points B and C.In the fourth state (4-way only), it flows between all three points.    3-way and 4-way stopcocks are sold in the popular kit 14011. They can also be bought separately: 14035-10
  7. Vibration Free Workstation/Platforms Defined
    May 01, 2012
    WPI offers both vibration free workstations and platforms, and each is custom-built to meet your specifications. This article describes the options available and how to request a price quote for the unit you need. The vibration-free platform looks like the one shown (left). The workstation tables are similar. These vibration-free units offer vertical and horizontal vibration isolation, high performace active-air suspension and automatic leveling. The diagrams below show dimensions of the workstations. Understanding Part Numbers ♦ Options Available ♦ Workstation Specifications ♦ Platform Specifications ♦ Performance Data
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