Doppler Flow Devices are efficient at detecting flow and require direct contact with naked, gel-covered skin. This device allows a very accurate determination of systotic blood pressure.

A Doppler ultrasound is a noninvasive test that can be used to evaluate blood flow and pressure by bouncing high-frequency sound waves (ultrasound) off red blood cells. The Doppler effect is a change in the frequency of sound waves reflected by a moving object. A Doppler ultrasound can estimate how fast blood flows by measuring the rate of change in its pitch (frequency). This test may be done as an alternative to more invasive procedures such as arteriography and venography, which involve injecting dye into the blood vessel to enhance X-ray images. A Doppler ultrasound may help diagnose many conditions, including: blood clots, incompetent valves in leg veins, which cause fluid to accumulate (venous insufficiency), heart valve defects & congenital heart disease, a blocked artery (arterial occlusion) and narrowing (stenosis) of an artery. This test also helps doctor to evaluate an injury to the arteries or to monitor arterial reconstruction and bypass grafts.

Dosimeter Device is an instrument that measures exposure to ionizing radiation over a given period. There are three types of dosimeters worn by persons who work with or near sources of radiation. The film badge is the most popular and inexpensive. In it, photographic or dental X-ray film, wrapped in light-tight paper, is mounted in plastic. Badges are checked periodically, and the degree of exposure of the film indicates the cumulative amount of radiation to which the wearer has been exposed. Thermo luminescent dosimeters are nonmetallic crystalline solids that trap electrons when exposed to ionizing radiation and can be mounted and calibrated to give a reading of radiation level. The ion-chamber dosimeter, like the thermo luminescent one, is reusable, but it is self-reading for immediate determination of exposure.

Dot & Slot Blotters features simple construction, four sample configurations and alphanumeric sample identification. These are used for DNA or RNA hybridizations and for protein immunological studies. Its application include clone screening with DNA/RNA probes and immunological screening with antibodies.

Dot Microfiltration System provides a reproducible method for binding protein or nucleic acid in solution onto nitrocellulose or zeta-probe membrane. It includes bio-dot & bio-dot SF templates, vacuum manifold base and gasket support plate.