The frequency of ultrasonic receivers should be 42kHz when it works. To make sure these ultrasonic receivers work, the operating temperature should be 0°C~50°C.
SEN0279 Features
Frequency: 42kHz Operating Temperature: 0°C~50°C Moisture Sensitivity Level: Not Applicable
SEN0279 Applications
There are a lot of DFRobot SEN0279 Ultrasonic Receivers applications.