SCOPEThis specification includes 40E60TR-4 ultrasonic sensor size,Website:http://www.osenon-ultrasonicsensor.nl, ... ultrasonic range finder, ultrasonic sensor for non-contact detect objects, ultrasonic distance sensor, ultrasonic liquid level sensor, etc. If you ... room where is normal temperature and humidity, and avoid the sunlight, sudden changes in temperature and humidity. It may cause of ...