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What is 3ATM 5ATM 10ATM 20ATM water resistant or waterproof watch ?

This page compares 3 ATM vs 5 ATM vs 10 ATM vs 20 ATM terms used in water resistant i.e. waterproof watch. It mentions features of 3ATM 5ATM 10ATM 20ATM water resistance smart watches with their applications or uses and water depth specifications.

Introduction: Smart watches are used in large numbers by morning walkers, runners, gym enthusiasts and health conscious peoplewal. As these watches display various health related parameters other than the time, they are called health bands. The common parameters displayed include heart rate (in bpm), SpO2 blood oxygen monitor, distance covered, daily step count, calorie burned etc. Health bands are manufactured at affordable rates by many companies due to advancement in technologies and increase in health care requirements.

Smart watch design

The watch which display additional parameters other than time is called smart watch. The smart watch consists of CPU, Bluetooth IC, GPS IC, display (TFT LCD or AMOLED), wearable sensors, buttons etc. Based on supported features, they are available in various price range.

Smartwatch Gear 2 Neo

The smart watches can be interfaced with mobile phone using bluetooth connectivity. Wearable sensors include heart rate sensor, SpO2 sensor, accelerometer, gyroscope etc. Operating systems such as android, tizen, iOS are required to be installed on these watches. Refer article on smart watch hardware components and parts >>.

Following are the basic specifications considered while selecting smart watch other than time as per usage applications.
• Wearable sensors availability
• Wireless connectivity
• Vibration motor
• Screen size and resolution
• Touch screen support
• Battery charging time, standby time, charging status indicator
• Operating system supported
• Sedentary reminder, Step counting, Sleep checking etc.
• Water resistant or waterproof

There are various parameters considered during smart watch design as explained above. The very critical among them is "water resistant" feature which specifies ability of the watch to withstand water pressure. This feature is specified in units of pressure (i.e. atmosphere or ATMs) or water depth (in units of meters) upto which watch works satisfactorily. There is no single watch in the world which is 100% waterproof due to the fact that moisture leaks into the case and affects its functioning. They are designed such that one watch can handle water pressure better than the other and so on. The popular smart watch manufacturers across the globe include Xiaomi, Huawei, Fitbit, Samsung etc.

Meaning of 3 ATM 5 ATM 10 ATM 20 ATM in water resistant watch

Water resistance levels for smart watches are specified from 3 ATM to 20 ATM. The watches of divers are manufactured which can work beyond 200 meters depth. Following table mentions features supported by 3ATM, 5ATM, 10ATM and 20ATM in smart watches made for water resistance applications with their pros and cons.

Water resistance type Water depth limit Applications
• 3 ATM 30 meters Pros : protects against rain splashes, during hand wash etc.
Cons : Not applicable during swimming and shower bath
• 5 ATM 50 meters Pros : Withstands short duration of water immersion e.g. light swimming
• 10 ATM 100 meters Pros : Suitable during water sports such as snorkeling, swimming etc.
• 20 ATM 200 meters Pros : Suitable for shallow diving and high impact water sports

Advantages and Disadvantages of other Sensor Types

Capacitive    Inductive    Photoelectric    Ultrasonic    Infrared    Motion    Biometric    Force    Humidity    Temperature    Light    Barometer    Sound    pH    Soil Moisture   

Advantages and Disadvantages of other wireless technologies

IrDA    HomeRF    Bluetooth    Radar    RF    Wireless    Internet    Mobile Phone    IoT    Solar Energy    Fiber Optic    Satellite    GPS    RFID    AM and FM    LTE   

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