Measuring Devices

By its nature, measurements demand precision. By design, DWK Life Sciences offers accurate measuring devices you can trust, whether you’re monitoring temperatures, determining surface tension, verifying the amount of solids in a liquid, or measuring viscosity, density, or gravity. From hydrometers to Pycnometers, Imhoff Cones to viscometers — we offer measuring devices for a variety of applications ranging — from petrochemicals to food and beverage and more. While precision and reliability are our primary focus, we’ve also designed our portfolio of measuring equipment to be environmentally friendly.

In accordance with ASTM standards, KIMBLE® hydrometers are manufactured from glass and are well-suited for multiple market segments including petrochemical, environmental, pharmaceutical, and the food and beverage industry. The measuring devices are floated in a liquid sample and our easy-to-read graduated scale indicates the relative density or specific gravity of the solution in units appropriate to the application. In response to the market, we’ve designed a more environmentally friendly instrument where the ballast is made from steel pellets plus a binder, free of heavier, toxic metals. Finally, the Certificate of Traceability included with each KIMBLE® hydrometer assures you that it’s manufactured using devices calibrated using NIST traceable standards.

A Pycnometer is a laboratory measuring device designed to measure and compare the densities or specific gravities of liquids and solids. Our 15123R series includes mercury-filled thermometers. If you prefer, our 15123N series includes non-mercury filled thermometers. In all cases, the thermometer is standard taper 10/18 with a range of 14 to 38 °C in 0.2-degree increments. And, because we’re serious about our commitment to precision, every thermometer is retested for accuracy within ± 0.2 degrees C. The standard taper 5/12 side tube cap has a small vent near the top and the body is conical to maximize stability. Capacity is within 10 percent of nominal shown on the flask. Each flask body is numbered for convenient, ready identification.

Imhoff sediment cones are designed for determining small amounts of settleable solids in water and waste effluent as described in the 22 nd Edition of Standard Methods for the Examination of Water and Wastewater, Method 2540 F. This measuring device may also be used for measurement of sand content in well water. The Imhoff cone is molded with sturdy uniform walls and a specially designed reinforced tip and a beaded rim. Each features a durable white ceramic scale with easy-to-read graduation. We offer both three and four place racks.

The surface tension analyzer from DWK Life Sciences consists of a glass capillary tube of
0.5mm nominal ID — graduated from 0-10 cm in 0.1 cm increments — a glass cylinder with tubulation, and a rubber stopper. The steps for using this measuring device are straightforward. First, understand that surface tension leads to the phenomena of capillary rise or depression. By introducing positive pressure in the apparatus, you’ll induce capillary depression. When you introduce negative pressure, you’ll induce capillary rise. The surface tension is calculated based upon the measurement of capillary rise and depression.

Our 15123R series of laboratory-grade thermometers are mercury-filled. If you prefer non-mercury spirit-filled, choose our 15123N series of measuring devices. This line features the same subdivisions, immersion depth, and precision as our mercury-filled versions with the added benefit of being safer and more environmentally friendly. For added assurance, our thermometers are retested for accuracy within ± 0.2 degrees C.

Cannon-Fenske uncalibrated viscometer tube is a measuring device designed to obtain kinematic viscosities of transparent liquids (ASTM Method of Test D445). Our KIMAX® tube adheres to ASTM specification D446 and is permanently marked with an individual serial number. Keep in mind that viscosity ranges are for an efflux time greater than 200 seconds. For easy readability, the lines and legend are printed in black. We recommend that calibration against a standard liquid of known viscosity or against a second viscometer with a known constant be made before use.