No.

Item

Unit

Specification

1

structure

Open

2

Using method

Transmitter, receiver

3

Nominal Frequency

Hz

20K

4

S P L for transmitter

dB

≥105(10V/30cm/sine wave)

5

Sensitivity for receiver

≥-70dBV/μMbar

6

Directivity

80deg

7

Capacitance

pF

3000±15%@1KHz

8

Operating Temperature

℃

-30….+85

9

Housing material

Al