Best prices on Welch allyn in Biometric Monitors. Check out BizRate for great deals on Biometric Monitors from Welch Allyn, Medline and Detecto. Use BizRate's latest online shopping features to compare prices for Welch allyn. Read product specifications, calculate tax and shipping charges, sort your results, and buy Health & Beauty Supplies with confidence. Easily narrow your search and find the product that's perfect for you: Welch Allyn Braun ThermoScan Pro 4000 Thermometer - Welch Allyn PanOptic Ophthalmoscope w/Half Moon Aperature.