Epson's Activity Trackers Keep an Eye On Your Heart Rate Because you are not allowed to be a company anymore if you don’t make an activity tracker, Epson is getting in on the action with its first two entries into the product category. While most of these are a dime a dozen, Epson’s Pulsense products might actually have a leg up on their competition: Built-in heart-rate monitoring. There are two Pulsenses to choose from: A watch and a band. The Pulsense PS-500 Watch is similar to products we’ve already seen, like the Basis B1 or the Mio Alpha. It uses a light and a sensor to detect subtle changes in the color of you skin which signify your pulse. It’s the same technology medical oximeters have used for years. It also contains an accelerometer, so it can tell you how many steps you’ve taken, how active you’ve been throughout the day, and even how you’re sleeping. Read on