When comparing the Bestisan SR04 and SR02, it is important to note the differences in their features and capabilities. The Bestisan SR04 is an ultrasonic sensor that is used to measure distance, while the Bestisan SR02 is an ultrasonic sensor that is used to measure both distance and temperature. Both sensors are relatively inexpensive and easy to use, but the SR04 is generally considered to be more accurate than the SR02.
The Bestisan SR04 has a range of 2cm to 400cm, while the Bestisan SR02 has a range of 3cm to 400cm. The SR04 has a higher accuracy of 0.3cm, while the SR02 has an accuracy of 2cm. The SR04 also has a faster response time of 30ms, while the SR02 has a response time of 50ms.
