The frequency of ultrasonic receivers should be 40kHz when it works. To make sure these ultrasonic receivers work, the operating temperature should be -40°C~120°C.
NBL45402H-A Features
Frequency: 40kHz Operating Temperature: -40°C~120°C Moisture Sensitivity Level: Not Applicable
NBL45402H-A Applications
There are a lot of KEMET NBL45402H-A Ultrasonic Receivers applications.