The frequency of ultrasonic receivers should be 42kHz when it works. To make sure these ultrasonic receivers work, the operating temperature should be -40°C~65°C.
SEN0270 Features
Frequency: 42kHz Operating Temperature: -40°C~65°C Moisture Sensitivity Level: Not Applicable
SEN0270 Applications
There are a lot of DFRobot SEN0270 Ultrasonic Receivers applications.