Welch Allyn is an American brand of medical devices and patient monitoring systems. The company is part of Hill-Rom. Welch Allyn is not immediately known to the consumer. However, in hospitals it is one of the very best brands used. The quality of Welch Allyn is very high. In addition, the products are also very versatile. Several cuffs can be attached to the Welch Allyn blood pressure monitors. This allows both small babies and people with thicker arms and legs to reliably measure blood pressure.