25kHz Receiving Transmitting Acoustic Transducer for Acoustical Research
Product Description
25kHz Receiving Transmitting Acoustic Transducer for Acoustical Research
Measurement content:
1. Conductance and susceptance curve
Measure the conductance and susceptance parameters of the transducer in the frequency band of 15kHz~40kHz.
2. Transmitting response
Measure the transmitting response of the transducer in the frequency band of 15kHz~40kHz.
3. Receiving sensitivity
Measure the receiving sensitivity of the transducer in the frequency band of 15kHz~40kHz.
4. Directivity
Measure the horizontal omnidirectional of the transducer at 25kHz, and the vertical opening angle shall not be less than 60°.
5. Hydrostatic pressure test
The hydrostatic pressure resistance of the transducer shall not be less than 1Mpa.
Measurement data
Conductance and susceptance parameters
25kH transducer 2024-01# |
||||||||
f/kHz |
G/ms |
B/ms |
f/kHz |
G/ms |
B/ms |
f/kHz |
G/ms |
B/ms |
15 |
0.5500 |
4.3972 |
23.5 |
0.8994 |
5.7353 |
32 |
0.5323 |
8.4825 |
15.25 |
0.5648 |
4.4692 |
23.75 |
0.8812 |
5.7931 |
32.25 |
0.5274 |
8.5734 |
15.5 |
0.5797 |
4.5600 |
24 |
0.8580 |
5.8502 |
32.5 |
0.5236 |
8.6662 |
15.75 |
0.6023 |
4.6566 |
24.25 |
0.8341 |
5.9116 |
32.75 |
0.5199 |
8.7589 |
16 |
0.6382 |
4.7809 |
24.5 |
0.8147 |
5.9774 |
33 |
0.5152 |
8.8539 |
16.25 |
0.7137 |
4.9090 |
24.75 |
0.7940 |
6.0406 |
33.25 |
0.5128 |
8.9498 |
16.5 |
0.8379 |
5.0293 |
25 |
0.7716 |
6.1081 |
33.5 |
0.5091 |
9.0461 |
16.75 |
1.0174 |
5.0914 |
25.25 |
0.7506 |
6.1739 |
33.75 |
0.5048 |
9.1429 |
17 |
1.1805 |
5.0594 |
25.5 |
0.7235 |
6.2448 |
34 |
0.5007 |
9.2431 |
17.25 |
1.2648 |
4.9745 |
25.75 |
0.7029 |
6.3200 |
34.25 |
0.4963 |
9.3478 |
17.5 |
1.2909 |
4.9115 |
26 |
0.6786 |
6.3941 |
34.5 |
0.4970 |
9.4459 |
17.75 |
1.2954 |
4.8701 |
26.25 |
0.6535 |
6.4766 |
34.75 |
0.4903 |
9.5505 |
18 |
1.2827 |
4.8561 |
26.5 |
0.6350 |
6.5603 |
35 |
0.4877 |
9.6559 |
18.25 |
1.2647 |
4.8551 |
26.75 |
0.6169 |
6.6447 |
35.25 |
0.4843 |
9.7609 |
18.5 |
1.2540 |
4.8691 |
27 |
0.6005 |
6.7325 |
35.5 |
0.4813 |
9.8692 |
18.75 |
1.2524 |
4.8836 |
27.25 |
0.5864 |
6.8215 |
35.75 |
0.4786 |
9.9798 |
19 |
1.2512 |
4.8972 |
27.5 |
0.5761 |
6.9113 |
36 |
0.4771 |
10.0909 |
19.25 |
1.2409 |
4.8907 |
27.75 |
0.5686 |
7.0028 |
36.25 |
0.4753 |
10.2039 |
19.5 |
1.2218 |
4.8897 |
28 |
0.5640 |
7.0911 |
36.5 |
0.4740 |
10.3187 |
19.75 |
1.1751 |
4.8839 |
28.25 |
0.5605 |
7.1811 |
36.75 |
0.4737 |
10.4348 |
20 |
1.0980 |
4.8932 |
28.5 |
0.5585 |
7.2687 |
37 |
0.4723 |
10.5523 |
20.25 |
0.9923 |
4.9494 |
28.75 |
0.5558 |
7.3551 |
37.25 |
0.4709 |
10.6737 |
20.5 |
0.9324 |
5.0978 |
29 |
0.5544 |
7.4430 |
37.5 |
0.4721 |
10.7973 |
20.75 |
0.9602 |
5.2145 |
29.25 |
0.5556 |
7.5288 |
37.75 |
0.4728 |
10.9200 |
21 |
1.0009 |
5.2758 |
29.5 |
0.5529 |
7.6132 |
38 |
0.4737 |
11.0461 |
21.25 |
1.0164 |
5.3167 |
29.75 |
0.5516 |
7.6998 |
38.25 |
0.4752 |
11.1740 |
21.5 |
1.0184 |
5.3533 |
30 |
0.5516 |
7.7867 |
38.5 |
0.4769 |
11.3051 |
21.75 |
1.0166 |
5.3914 |
30.25 |
0.5518 |
7.8706 |
38.75 |
0.4793 |
11.4386 |
22 |
1.0018 |
5.4346 |
30.5 |
0.5487 |
7.9553 |
39 |
0.4826 |
11.5734 |
22.25 |
0.9897 |
5.4795 |
30.75 |
0.5469 |
8.0417 |
39.25 |
0.4862 |
11.7113 |
22.5 |
0.9739 |
5.5250 |
31 |
0.5436 |
8.1214 |
39.5 |
0.4905 |
11.8516 |
22.75 |
0.9547 |
5.5723 |
31.25 |
0.5470 |
8.2163 |
39.75 |
0.4963 |
11.9939 |
23 |
0.9336 |
5.6308 |
31.5 |
0.5384 |
8.3042 |
40 |
0.4994 |
12.1381 |
23.25 |
0.9201 |
5.6836 |
31.75 |
0.5346 |
8.3936 |
|||
25kH transducer 2024-02# |
||||||||
f/kHz |
G/ms |
B/ms |
f/kHz |
G/ms |
B/ms |
f/kHz |
G/ms |
B/ms |
15 |
0.5691 |
4.2575 |
23.5 |
0.9883 |
5.3482 |
32 |
0.6402 |
7.9742 |
15.25 |
0.6038 |
4.3292 |
23.75 |
0.9619 |
5.3998 |
32.25 |
0.6385 |
8.0602 |
15.5 |
0.6336 |
4.4090 |
24 |
0.9375 |
5.4591 |
32.5 |
0.6372 |
8.1474 |
15.75 |
0.6696 |
4.4939 |
24.25 |
0.9163 |
5.5135 |
32.75 |
0.6364 |
8.2348 |
16 |
0.7148 |
4.5870 |
24.5 |
0.8877 |
5.5739 |
33 |
0.6354 |
8.3238 |
16.25 |
0.7783 |
4.6927 |
24.75 |
0.8658 |
5.6409 |
33.25 |
0.6348 |
8.4136 |
16.5 |
0.8784 |
4.8035 |
25 |
0.8426 |
5.7045 |
33.5 |
0.6339 |
8.5047 |
16.75 |
1.0238 |
4.8746 |
25.25 |
0.8202 |
5.7745 |
33.75 |
0.6329 |
8.5962 |
17 |
1.1800 |
4.8801 |
25.5 |
0.8029 |
5.8450 |
34 |
0.6318 |
8.6900 |
17.25 |
1.2963 |
4.8336 |
25.75 |
0.7806 |
5.9129 |
34.25 |
0.6312 |
8.7865 |
17.5 |
1.3727 |
4.7751 |
26 |
0.7606 |
5.9870 |
34.5 |
0.6319 |
8.8806 |
17.75 |
1.4189 |
4.7095 |
26.25 |
0.7428 |
6.0614 |
34.75 |
0.6306 |
8.9786 |
18 |
1.4271 |
4.6393 |
26.5 |
0.7236 |
6.1380 |
35 |
0.6315 |
9.0780 |
18.25 |
1.3912 |
4.5917 |
26.75 |
0.7066 |
6.2167 |
35.25 |
0.6314 |
9.1768 |
18.5 |
1.3508 |
4.5878 |
27 |
0.6920 |
6.2976 |
35.5 |
0.6318 |
9.2787 |
18.75 |
1.3310 |
4.6040 |
27.25 |
0.6794 |
6.3770 |
35.75 |
0.6332 |
9.3820 |
19 |
1.3135 |
4.6129 |
27.5 |
0.6645 |
6.4591 |
36 |
0.6351 |
9.4863 |
19.25 |
1.2994 |
4.6201 |
27.75 |
0.6524 |
6.5461 |
36.25 |
0.6369 |
9.5920 |
19.5 |
1.2741 |
4.6235 |
28 |
0.6461 |
6.6331 |
36.5 |
0.6396 |
9.7007 |
19.75 |
1.2280 |
4.6375 |
28.25 |
0.6395 |
6.7191 |
36.75 |
0.6432 |
9.8093 |
20 |
1.1837 |
4.6593 |
28.5 |
0.6373 |
6.8063 |
37 |
0.6462 |
9.9187 |
20.25 |
1.1195 |
4.6920 |
28.75 |
0.6377 |
6.8900 |
37.25 |
0.6495 |
10.0328 |
20.5 |
1.0393 |
4.7831 |
29 |
0.6374 |
6.9711 |
37.5 |
0.6547 |
10.1483 |
20.75 |
1.0327 |
4.9136 |
29.25 |
0.6359 |
7.0595 |
37.75 |
0.6596 |
10.2637 |
21 |
1.0886 |
4.9990 |
29.5 |
0.6371 |
7.1440 |
38 |
0.6656 |
10.3814 |
21.25 |
1.1274 |
5.0218 |
29.75 |
0.6394 |
7.2279 |
38.25 |
0.6713 |
10.5014 |
21.5 |
1.1275 |
5.0390 |
30 |
0.6418 |
7.3093 |
38.5 |
0.6780 |
10.6242 |
21.75 |
1.1227 |
5.0724 |
30.25 |
0.6432 |
7.3949 |
38.75 |
0.6857 |
10.7489 |
22 |
1.1158 |
5.1049 |
30.5 |
0.6426 |
7.4752 |
39 |
0.6947 |
10.8755 |
22.25 |
1.1046 |
5.1308 |
30.75 |
0.6427 |
7.5572 |
39.25 |
0.7036 |
11.0038 |
22.5 |
1.0822 |
5.1656 |
31 |
0.6411 |
7.6368 |
39.5 |
0.7127 |
11.1351 |
22.75 |
1.0630 |
5.2066 |
31.25 |
0.6433 |
7.7225 |
39.75 |
0.7232 |
11.2690 |
23 |
1.0381 |
5.2488 |
31.5 |
0.6414 |
7.8051 |
40 |
0.7349 |
11.4040 |
23.25 |
1.0093 |
5.2955 |
31.75 |
0.6403 |
7.8899 |
|||
25kH transducer 2024-03# |
||||||||
f/kHz |
G/ms |
B/ms |
f/kHz |
G/ms |
B/ms |
f/kHz |
G/ms |
B/ms |
15 |
0.5996 |
4.3743 |
23.5 |
0.9346 |
5.7118 |
32 |
0.6631 |
8.4624 |
15.25 |
0.6199 |
4.4457 |
23.75 |
0.9227 |
5.7736 |
32.25 |
0.6649 |
8.5529 |
15.5 |
0.6328 |
4.5358 |
24 |
0.9063 |
5.8269 |
32.5 |
0.6660 |
8.6442 |
15.75 |
0.6650 |
4.6364 |
24.25 |
0.8821 |
5.8866 |
32.75 |
0.6681 |
8.7363 |
16 |
0.7072 |
4.7487 |
24.5 |
0.8646 |
5.9524 |
33 |
0.6693 |
8.8298 |
16.25 |
0.7825 |
4.8785 |
24.75 |
0.8459 |
6.0147 |
33.25 |
0.6710 |
8.9243 |
16.5 |
0.9201 |
4.9945 |
25 |
0.8241 |
6.0840 |
33.5 |
0.6733 |
9.0203 |
16.75 |
1.1160 |
5.0375 |
25.25 |
0.8077 |
6.1526 |
33.75 |
0.6761 |
9.1150 |
17 |
1.2602 |
4.9600 |
25.5 |
0.7865 |
6.2223 |
34 |
0.6765 |
9.2126 |
17.25 |
1.3195 |
4.8863 |
25.75 |
0.7693 |
6.2963 |
34.25 |
0.6779 |
9.3128 |
17.5 |
1.3252 |
4.8255 |
26 |
0.7487 |
6.3683 |
34.5 |
0.6793 |
9.4128 |
17.75 |
1.3430 |
4.7992 |
26.25 |
0.7275 |
6.4481 |
34.75 |
0.6822 |
9.5156 |
18 |
1.3297 |
4.7652 |
26.5 |
0.7112 |
6.5291 |
35 |
0.6854 |
9.6194 |
18.25 |
1.2957 |
4.7623 |
26.75 |
0.6950 |
6.6120 |
35.25 |
0.6878 |
9.7221 |
18.5 |
1.2762 |
4.7752 |
27 |
0.6810 |
6.6963 |
35.5 |
0.6898 |
9.8284 |
18.75 |
1.2605 |
4.7927 |
27.25 |
0.6672 |
6.7817 |
35.75 |
0.6933 |
9.9379 |
19 |
1.2512 |
4.8195 |
27.5 |
0.6556 |
6.8710 |
36 |
0.6974 |
10.0458 |
19.25 |
1.2404 |
4.8205 |
27.75 |
0.6475 |
6.9611 |
36.25 |
0.7005 |
10.1564 |
19.5 |
1.2170 |
4.8269 |
28 |
0.6414 |
7.0517 |
36.5 |
0.7050 |
10.2699 |
19.75 |
1.1788 |
4.8261 |
28.25 |
0.6386 |
7.1431 |
36.75 |
0.7117 |
10.3840 |
20 |
1.0947 |
4.8325 |
28.5 |
0.6394 |
7.2313 |
37 |
0.7168 |
10.4987 |
20.25 |
0.9790 |
4.9102 |
28.75 |
0.6374 |
7.3199 |
37.25 |
0.7215 |
10.6170 |
20.5 |
0.9326 |
5.0678 |
29 |
0.6397 |
7.4091 |
37.5 |
0.7283 |
10.7392 |
20.75 |
0.9732 |
5.1887 |
29.25 |
0.6426 |
7.4940 |
37.75 |
0.7348 |
10.8595 |
21 |
1.0221 |
5.2445 |
29.5 |
0.6413 |
7.5800 |
38 |
0.7436 |
10.9824 |
21.25 |
1.0385 |
5.2811 |
29.75 |
0.6432 |
7.6692 |
38.25 |
0.7506 |
11.1074 |
21.5 |
1.0395 |
5.3187 |
30 |
0.6472 |
7.7558 |
38.5 |
0.7596 |
11.2358 |
21.75 |
1.0350 |
5.3569 |
30.25 |
0.6480 |
7.8416 |
38.75 |
0.7694 |
11.3667 |
22 |
1.0241 |
5.4019 |
30.5 |
0.6492 |
7.9292 |
39 |
0.7809 |
11.4988 |
22.25 |
1.0140 |
5.4498 |
30.75 |
0.6525 |
8.0170 |
39.25 |
0.7918 |
11.6320 |
22.5 |
1.0008 |
5.4926 |
31 |
0.6522 |
8.1046 |
39.5 |
0.8015 |
11.7700 |
22.75 |
0.9819 |
5.5437 |
31.25 |
0.6551 |
8.1944 |
39.75 |
0.8137 |
11.9092 |
23 |
0.9641 |
5.6032 |
31.5 |
0.6580 |
8.2825 |
40 |
0.8286 |
12.0512 |
23.25 |
0.9536 |
5.6585 |
31.75 |
0.6595 |
8.3730 |
|||
25kH transducer 2024-04# |
||||||||
f/kHz |
G/ms |
B/ms |
f/kHz |
G/ms |
B/ms |
f/kHz |
G/ms |
B/ms |
15 |
0.5779 |
4.4556 |
23.5 |
0.9882 |
5.7285 |
32 |
0.6672 |
8.5413 |
15.25 |
0.6058 |
4.5420 |
23.75 |
0.9616 |
5.7815 |
32.25 |
0.6653 |
8.6347 |
15.5 |
0.6279 |
4.6318 |
24 |
0.9392 |
5.8429 |
32.5 |
0.6641 |
8.7291 |
15.75 |
0.6537 |
4.7395 |
24.25 |
0.9133 |
5.9058 |
32.75 |
0.6636 |
8.8236 |
16 |
0.7010 |
4.8665 |
24.5 |
0.8822 |
5.9716 |
33 |
0.6641 |
8.9196 |
16.25 |
0.7920 |
4.9931 |
24.75 |
0.8578 |
6.0426 |
33.25 |
0.6632 |
9.0163 |
16.5 |
0.9434 |
5.0932 |
25 |
0.8306 |
6.1127 |
33.5 |
0.6618 |
9.1152 |
16.75 |
1.1036 |
5.1245 |
25.25 |
0.8069 |
6.1878 |
33.75 |
0.6604 |
9.2162 |
17 |
1.2393 |
5.1023 |
25.5 |
0.7863 |
6.2661 |
34 |
0.6609 |
9.3181 |
17.25 |
1.3200 |
5.0475 |
25.75 |
0.7623 |
6.3449 |
34.25 |
0.6621 |
9.4216 |
17.5 |
1.3674 |
4.9935 |
26 |
0.7415 |
6.4320 |
34.5 |
0.6622 |
9.5243 |
17.75 |
1.3933 |
4.9541 |
26.25 |
0.7224 |
6.5179 |
34.75 |
0.6620 |
9.6300 |
18 |
1.4078 |
4.9291 |
26.5 |
0.7087 |
6.6040 |
35 |
0.6642 |
9.7385 |
18.25 |
1.3962 |
4.8984 |
26.75 |
0.6962 |
6.6920 |
35.25 |
0.6649 |
9.8465 |
18.5 |
1.3721 |
4.8971 |
27 |
0.6851 |
6.7821 |
35.5 |
0.6672 |
9.9576 |
18.75 |
1.3678 |
4.9038 |
27.25 |
0.6794 |
6.8722 |
35.75 |
0.6702 |
10.0678 |
19 |
1.3477 |
4.8933 |
27.5 |
0.6727 |
6.9620 |
36 |
0.6732 |
10.1820 |
19.25 |
1.3288 |
4.8904 |
27.75 |
0.6669 |
7.0533 |
36.25 |
0.6773 |
10.2962 |
19.5 |
1.2957 |
4.8794 |
28 |
0.6670 |
7.1415 |
36.5 |
0.6819 |
10.4153 |
19.75 |
1.2272 |
4.8899 |
28.25 |
0.6665 |
7.2274 |
36.75 |
0.6858 |
10.5323 |
20 |
1.1309 |
4.9284 |
28.5 |
0.6654 |
7.3159 |
37 |
0.6910 |
10.6498 |
20.25 |
1.0276 |
5.0306 |
28.75 |
0.6682 |
7.4040 |
37.25 |
0.6973 |
10.7747 |
20.5 |
1.0248 |
5.1783 |
29 |
0.6685 |
7.4885 |
37.5 |
0.7044 |
10.8980 |
20.75 |
1.0777 |
5.2696 |
29.25 |
0.6671 |
7.5744 |
37.75 |
0.7113 |
11.0240 |
21 |
1.1140 |
5.3203 |
29.5 |
0.6691 |
7.6653 |
38 |
0.7193 |
11.1510 |
21.25 |
1.1330 |
5.3480 |
29.75 |
0.6720 |
7.7476 |
38.25 |
0.7273 |
11.2818 |
21.5 |
1.1311 |
5.3793 |
30 |
0.6709 |
7.8332 |
38.5 |
0.7359 |
11.4147 |
21.75 |
1.1248 |
5.4109 |
30.25 |
0.6716 |
7.9224 |
38.75 |
0.7463 |
11.5489 |
22 |
1.1153 |
5.4428 |
30.5 |
0.6718 |
8.0066 |
39 |
0.7577 |
11.6867 |
22.25 |
1.0993 |
5.4825 |
30.75 |
0.6704 |
8.0946 |
39.25 |
0.7691 |
11.8255 |
22.5 |
1.0761 |
5.5240 |
31 |
0.6694 |
8.1816 |
39.5 |
0.7814 |
11.9669 |
22.75 |
1.0592 |
5.5709 |
31.25 |
0.6694 |
8.2711 |
39.75 |
0.7941 |
12.1134 |
23 |
1.0378 |
5.6202 |
31.5 |
0.6695 |
8.3590 |
40 |
0.8101 |
12.2588 |
23.25 |
1.0092 |
5.6747 |
31.75 |
0.6687 |
8.4499 |
|||
1.1. Transmitting Response（dB）
f/kHz |
2024-01# |
2024-02# |
2024-03# |
2024-04# |
15 |
139.5 |
140.4 |
139.2 |
139.5 |
16 |
139.1 |
140.3 |
139.8 |
140.2 |
17 |
144.7 |
143.7 |
143.5 |
142.7 |
18 |
144.3 |
145.2 |
143.6 |
144.1 |
19 |
144.5 |
145.4 |
144.2 |
144.7 |
20 |
143.7 |
145.7 |
144.6 |
144.9 |
21 |
144.4 |
145.2 |
146.2 |
145.1 |
22 |
144.6 |
145.0 |
144.3 |
144.2 |
23 |
144.5 |
144.7 |
143.9 |
143.9 |
24 |
144.1 |
143.5 |
143.6 |
142.4 |
25 |
143.3 |
143.6 |
142.8 |
142.5 |
26 |
142.4 |
142.8 |
142.4 |
142.2 |
27 |
140.4 |
142.7 |
142.3 |
142.3 |
28 |
141.3 |
142.7 |
142.2 |
142.4 |
29 |
140.0 |
142.0 |
142.0 |
142.0 |
30 |
140.3 |
141.1 |
141.2 |
141.2 |
31 |
140.1 |
140.8 |
140.4 |
141.5 |
32 |
139.2 |
141.5 |
141.0 |
140.7 |
33 |
139.5 |
141.4 |
141.2 |
140.8 |
34 |
140.0 |
141.5 |
141.4 |
141.5 |
35 |
139.7 |
141.1 |
140.9 |
141.0 |
36 |
139.1 |
140.9 |
140.0 |
140.4 |
37 |
139.0 |
140.0 |
138.7 |
139.4 |
38 |
138.5 |
139.2 |
138.1 |
138.6 |
39 |
138.4 |
138.2 |
138.3 |
138.7 |
40 |
138.0 |
137.9 |
138.3 |
138.4 |
1.2. Receive Sensitivity（dB）
f/kHz |
2024-01# |
2024-02# |
2024-03# |
2024-04# |
15 |
-194.0 |
-192.6 |
-194.2 |
-193.6 |
16 |
-194.5 |
-193.0 |
-195.4 |
-193.2 |
17 |
-194.2 |
-195.6 |
-193.0 |
-194.5 |
18 |
-192.0 |
-192.3 |
-191.3 |
-192.2 |
19 |
-191.9 |
-192.7 |
-192.1 |
-191.4 |
20 |
-189.5 |
-190.2 |
-189.6 |
-189.5 |
21 |
-190.2 |
-191.1 |
-190.2 |
-189.4 |
22 |
-191.9 |
-190.4 |
-192.7 |
-193.3 |
23 |
-192.2 |
-193.3 |
-191.2 |
-192.9 |
24 |
-195.5 |
-195.9 |
-196.0 |
-194.2 |
25 |
-197.8 |
-197.4 |
-198.2 |
-197.6 |
26 |
-199.2 |
-200.6 |
-198.0 |
-199.8 |
27 |
-202.0 |
-202.6 |
-202.7 |
-201.6 |
28 |
-201.9 |
-202.3 |
-201.4 |
-201.3 |
29 |
-201.1 |
-200.4 |
-199.9 |
-199.7 |
30 |
-202.2 |
-202.5 |
-201.4 |
-201.9 |
31 |
-202.7 |
-201.7 |
-201.9 |
-204.0 |
32 |
-202.7 |
-203.9 |
-203.8 |
-201.9 |
33 |
-204.1 |
-204.5 |
-203.6 |
-202.7 |
34 |
-203.4 |
-204.6 |
-204.6 |
-202.7 |
35 |
-204.8 |
-206.2 |
-205.0 |
-206.1 |
36 |
-202.2 |
-202.5 |
-201.2 |
-202.2 |
37 |
-203.1 |
-204.4 |
-203.3 |
-203.2 |
38 |
-203.6 |
-203.0 |
-204.4 |
-202.5 |
39 |
-204.5 |
-206.0 |
-205.9 |
-204.4 |
40 |
-206.6 |
-208.5 |
-207.7 |
-206.5 |
1.3. Horizontal Directivity
Vertical Directivity
Hydrostatic pressure test:
After the transducer is subjected to 1MPa/1h, 0MPa/0.5h, 1MPa/1h, 0MPa/0.5h hydrostatic pressure test, the insulation resistance between the positive and negative electrodes of the transducer is greater than 200MΩ.