There are watches that want to measure everything. Sleep, steps, pulse, stress, calories. The Huawei Watch D3 does it too, but its true ambition lies in a function that is not usually part of the smartwatch repertoire: measuring blood pressure with a mechanical system, not through optical estimation. The key is under the strap. Over there, A small air chamber is inflated thanks to a micropump and exerts the necessary pressure to obtain a tension reading.
And it does so with enough precision that The European Union has granted it the category of class IIa medical device, a label for which specific safety and performance requirements, clinical evaluation and analysis procedures are needed. of compliance that depend on the class and characteristics of the device.
The idea has something of a technological paradox. In a market where manufacturers compete to make their watches thinner and more discreet, Huawei introduces a piece that needs space to fill with air and fulfill its function. However, The Watch D3 manages to integrate the mechanism into a body that is 11.3 millimeters thick and weighs about 40 grams without a strap. It’s not the most delicate watch you can wear on your wrist, but it doesn’t look like a traditional blood pressure monitor disguised as a smartwatch either.
Its 1.92-inch AMOLED screen, with a resolution of 408 x 480 pixels, is large and easy to consult. The rectangular format facilitates the reading of notifications and health data. The rotating crown and side button make it easy to operate, while the advertised maximum brightness of 3,000 nits allows information to be consulted even in bright outdoors. The design maintains a sporty and contemporary look, although the volume of the strap and closure may be less elegant than that of a conventional watch. It is not light, but it is comfortable and goes almost unnoticed or at least blends in like an Ultra version smartwatch.
But the interesting thing is that the Watch D3 cannot be understood by its screen. Its reason for being begins by measuring blood pressure. The system uses the oscillometric method, similar to that of conventional blood pressure monitors: The micropump inflates the air chamber integrated in the strap and a sensor registers pressure variations. The result is expressed in the two usual figures, systolic and diastolic, in millimeters of mercury.
The advantage is obvious: there is no need to carry a separate device or always resort to spot measurement with an arm cuff. The watch allows you to take manual readings and also activate a 24-hour ambulatory monitoring plan. The latter records measurements at programmed intervals, even during sleep, and generates a report with the daytime, nighttime and overall day averages.. For those who need to observe how their pressure varies throughout the day, that continuity can be more valuable than a single number. The information is recorded and, if we give permission, we can share it with health officials.
How reliable is it? Enough to obtain the aforementioned EU label, but that’s not all. The fundamental thing is that it is a device linked to health, non-invasive and that we can wear 24 hours a day. This does not make the watch a substitute for medical consultation nor does it allow you to adjust medication on your own, but taking into account the importance of pressure when it comes to prevention of cardiovascular events and that this can vary in a matter of minutes, it is a tool of enormous value for health.
The D3 also expands its cardiovascular functions with electrocardiogram, pulse wave arrhythmia analysis, heart rate and heart rate variability monitoring. It also records sleep, stress, blood oxygen and physical activity. Among the new features, the measurement of blood pressure before and after exercise stands out, a tool that seeks to provide information on the cardiovascular response to effort. These features, however, may vary by country and software availability. Autonomy is another of its strong points. Huawei advertises up to six days of typical use, although when using 24-hour ambulatory blood pressure monitoring, the time is greatly reduced. The good news is that, depending on the charger, in less than an hour, we can be up and running again.
It is important to take into account some details. As it is a device intended to monitor vital signs, it requires certain parameters. It is not enough to “wear it on your wrist”. The measurement mechanism requires correctly adjusting the strap and maintaining an appropriate posture: the wrist must remain at heart level, the user must be still and silent, and the arm should be supported. The air chamber also imposes important restrictions. Although the watch has IP68 protection, Huawei advises against showering or swimming with it, and warns that it should dry completely before taking a measurement again.
The price of 449 euros places the Watch D3 in a demanding category, but it must be understood that you are not paying only for a screen or for tracking activity or sports, but for a technology that is still exceptional in the smart watch market, but that in less than a decade will be a standard if we take into account the hypertension prevention programs of the World Health Organization. The WHO estimates that there are 1.4 billion adults aged 30 to 79 with hypertension worldwide. And 600 million adults are unaware that they suffer from this condition.
For those who only want to count steps, receive notifications or record workouts, there are cheaper alternatives. For those who need to control blood pressure frequently and comfortably, the proposal takes on another meaning. The Huawei Watch D3 is not a watch that hides one more function. It is a blood pressure monitor that has learned to look like a smartwatch. And that small pad, under its strap and its screen, is precisely what makes it a different device.