It must be a lot of fun to run around with that kind of blood pressure machineA watch cannot accurately measure blood pressure. Period.
As a physician I advice my patients to buy a blood pressure machine with a cuff that they can apply around their arm. Gadgets that claim to measure blood pressure at the wrist are also often inaccurate.
Here is a tip for your important work "hard blood pressure cosmetics can lead to cerebral infarctions in the early morning".