250ET25F
250ET25F (transmitter) is a ultrasonic sensor and it is usually used coupled to 250ER25F (receiver).
Electroacoustic transducers
Electroacoustic transducers
400ET25U
400ET25U (transmitter) is a ultrasonic sensor and it is usually used coupled to 400ER25U (receiver).
400ST10B
400ST10B (transmitter) is a ultrasonic sensor and it is usually used coupled to 400SR10B (receiver)
US040
The US040015 is an ultrasonic sensor of asymmetrical beam patterns, approximates ±80° / 40° for orizontal/vertical, which mostly suits for car reversing aids.