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 H199370002/ 47727-232 can fulfill your laboratory needs while still offering a great value for the money. Product Category Description: Spin-on self-sealing rotors provide a definite visual indication of flow in a tubing line. Small bubbles which indicate flow remain in the same size for weeks. When fluid begins to flow the bubbles coalesce into a 'snowfall' on the outside of the indicator. As the fluid level on the inside of the indicator decreases the rotor turns a different color indicating that the fluid level has dropped by the indicated amount. The color change from red to green is due to flow-stimulating dilatation of the fluid molecules within the indicator. When the color changes the fluid is no longer live but has died and must be replaced. This procedure does not affect the chemical or temperature stability of the fluid. The bubbles in the flow indicator are caused by the rotation of the flow sensor and are not permanent once flow ceases. For fast continuous visual indication of fluid flow in tubing or containers use the Roto-Flo flow indicator with the large flow indicator rotor. Ordering Information: The large flow indicator with large hole is supplied with a plastic handle and locating flags. Large yellow fluid bubbles indicate fluid flow in a flow direction. The indicators with large yellow fluid bubbles require that the fluid temperature does not rise above 64 C (150 F). Specifications for Bel-Art Roto-Flo Flow Indicators SCIENCEWARE H199370002 : Fits Tubing I.D.mm (in.): 6.4-8.0 (1/4-5/16) TubeEnds: Barbed WheelColor: Red Bel-Art No.: H199370002 (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 H199370002/ 47727-232 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 H199370002 Each of 12