Bel-Art Roto-Flo Flow Indicators SCIENCEWARE H Each of 12. Combining top-notch and uncompromising quality with an affordable price the Bel-Art Roto-Flo Flow Indicators SCIENCEWARE H199370003/ 47727-234 can fulfill your laboratory needs while still offering a great value for the money. Product Category Description: Need to know the flow rate of your tubes and fluid baths? The white Roto-Flo Flow Indicators SCIENCEWARE H199370003 are the visual indicators you need. The color indicating paddle makes it easy to determine the direction of flow in your water or gas flow tubing. Clear smoke-clear paddles are easy to see against most colored backgrounds. The indicators rely on a glow-in-the-dark sensor mounted between the sensor and the flow tube. A drop of fluid such as water breaks the motion of the sensor causing the blue-gray liquid to change from orange to red. This is normal and does not pose a threat to the rotor. The only way to prevent the change in color is to turn the flow-tracking device off. Specifications for Bel-Art Roto-Flo Flow Indicators SCIENCEWARE H199370003 : Fits Tubing I.D.mm (in.): 8.0-12.8 (5/16-1/2) TubeEnds: Barbed WheelColor: Green Bel-Art No.: H199370003 (Please note that the description and stock photo may not correspond to the specific model listed above) We offer only genuine Bel-Art products authorized for sale in the U.S. and other markets so you can be sure that you are buying authentic Beakers Test Tubes Flasks & Accessories with a full manufacturer's warranty in addition to our own 100percent Satisfaction Guarantee. We are your premier online distributor for Bel-Art Beakers Test Tubes Flasks & Accessories. We are an authorized supplier to all federal and state government agencies as well as to research and educational institutions and can facilitate volume orders on many types of laboratory equipment lab consumables and other products to help fulfill your specific needs. We offer Free Shipping and FREE USPS shipping to APO and FPO addresses on all orders in our store over 49. Please refer to our APO/FPO Shipping and Export Restrictions for more information on export to APO/FPO addresses. In addition to the Bel-Art Roto-Flo Flow Indicators SCIENCEWARE H199370003/ 47727-234 we carry a full complement of Beakers Test Tubes Flasks & Accessories as well as other product offerings from Bel-Art. We also carry a full line of Bel-Art accessories to help meet your laboratory and scientific needs. For a complete selection of Bel-Art Beakers Test Tubes Flasks & Accessories please visit our Bel-Art page. For more brand name Beakers Test Tubes Flasks & Accessories please visit our Beakers Test Tubes Flasks & Accessories store section. To see our complete line of lab medical industrial and scientific products please see our science and lab equipment online catalog. Bel-Art Roto-Flo Flow Indicators SCIENCEWARE H199370003 Each of 12