A vein detector is a medical device used to locate veins beneath the skin’s surface, assisting healthcare professionals in finding optimal sites for blood draws, IV placements, or injections. Utilizing near-infrared (NIR) light or other imaging technology, the device highlights veins by detecting hemoglobin, which absorbs the light differently than surrounding tissue. This creates a clear, real-time image of the veins on the skin, reducing the need for multiple needle insertions. Vein detectors are especially helpful for patients with hard-to-locate veins, such as children, the elderly, or those with certain health conditions. Compact, portable, and often handheld, vein detectors improve procedure accuracy, patient comfort, and clinical efficiency, making them a valuable tool in hospitals, clinics, and labs.