英国CTG(Chelsea Technology Group)公司长期致力于水体声学研究，提供系列化的声学换能器产品
DualSense系列—互易换能器
特点：该系列涵盖了很宽的频率范围内，水平全方位，多数有一个垂直的方向性大于270度
典型应用：标定参考标准，海洋哺乳动物的音频检测，环境噪声测量，空气枪监测，声学参考标准，使用在港口防御系统。
HydroSense系列—预放大水听器
特点：接收灵敏度高，集成前置放大器，出色的信号噪声比，水平全方位，运行在很宽的频率范围内。
典型应用：远程监测，海洋哺乳动物的声音传感器，海况噪声测量，环境噪声测量。
SonoFlex系列—弯曲圆盘换能器
特点：高源的水平和发射灵敏度，频率低，运行在深度高大10米，重量轻，效率高
典型应用：声参考标准，作为低频阵列投影机，声波导航和测距系统的应用。
SonoTube系列—水声通信
特点：低频，高功率发射-接收换能器，活跃在5kHz～20kHz，适合所有海洋的深度。
典型应用：遥测，水下无线通信如通信浮标，水声定位导航系统，水下电话，声参考标准。
BroadBand系列—宽频发射换能器
特点：宽频换能器，高功率，通常集成调谐元件产生宽且平坦的传输响应。
典型应用：声的参考标准，使用的声纳测试与评价系统
Characteristic
| Product Name | Resonant Frequency | Recommended Operational Frequency Range | Order Code |
| DualSense 012 | 12kHz | 0.01-20kHz | CTG1273-0010 |
| DualSense 030 | 30kHz | 0.01-60kHz | CTG2257-003 |
| DualSense 060H | 56kHz | 0.01-80kHz | CTG1253-0001 |
| DualSense 060S-BH | 56kHz | 0.01-80kHz | CTG2128-0001 |
| DualSense 080 | 80kHz | 0.01-125kHz | CTG0708-0001 |
| DualSense 115 | 115kHz | 0.01-150kHz | CTG0691-0001 |
| HydroSense 115/45 | 115kHz | 0.01-150kHz | CTG1308-0001 |
| HydroSense 115/19 | 115kHz | 0.01-150kHz | CTG1297-0001 |
| HydroSense 080/45 | 80kHz | 0.01-100kHz | CTG0791-0001 |
| SonoFlex 850 | 850kHz | 0.6-20kHz | CTG0241-0001 |
| SonoFlex 850-HP | 850kHz | 0.6-20kHz | CTG0241-0001-HP |
| SonoFlex 1350 | 1.35kHz | 0.75-4kHz | CTG1181-0002 |
| SonoFlex 1600 | 1.6kHz | 1.25-3kHz | CTG1162-0001 |
| SonoFlex 2200 | 1.9kHz | 1.8-6kHz | CTG2132-001 |
| SonoTube 008/D13 | 8 & 13kHz | 7-16kHz | CTG0052-0001 |
| SonoTube 008/D13-UW | 8 & 13kHz | 7-16kHz | CTG0052-0028 |
| SonoTube 008/D13-DT | 8 & 13kHz | 7-16kHz | CTG0052-0010 |
| SonoTube 008/D12 | 8 & 12kHz | 6-20kHz | CTG1330-0001 |
| SonoTube 008/D12-DT | 8 & 12kHz | 6-20kHz | CTG1330-0010 |
| SonoTube 008/D12-UW | 8 & 12kHz | 6-20kHz | CTG1330-0025 |
| SonoTube 008/D12-PA-DT | 8 & 12kHz | 6-20kHz | CTG2213-001 |
| BroadBand 012 | 12kHz | 0.01-20kHz | CTG1273-0001 |
| BroadBand 030 | 30kHz | 15-50kHz | CTG0811-0259 |
| BroadBand 065 | 65kHz | 50-110kHz | CTG0811-0260 |
| BroadBand 150 | 150kHz | 110-200kHz | CTG0811-0261 |
| BroadBand 026/D55 | 26 & 55kHz | 20-80kHz | CTG0615-003 |
| Name | Resonant Frequency | Receive Sensitivity @ Resonance (dB re 1V/1μPa) | Recommended Receive Frequency Range | Transmit Sensitivity @ Resonance(dB re 1μPa/V) | Recommended Transmit Frequency Range | Maximum Source Level @ Resonance(dB re 1μPa) | Q-Factor |
| DualSense 012 | 12.5kHz | -181dB | 10Hz –20kHz | 148dB | 10kHz – 16kH | 202dB | 3.4 |
| DualSense 030 | 30kHz | -191dB | 10Hz – 50kHz | 149dB | 20kHz - 60kHz | 209dB | 3.5 |
| DualSense 060H | 60kHz | -196dB | 10Hz –80kHz | 149dB | 50kHz – 80kH | 204dB | 7.5 |
| DualSense 060S-BH | 60kHz | -194dB | 10Hz – 80kHz | 150dB | 40kHz - 80kHz | 197dB | 8.5 |
| DualSense 080 | 80kHz | -197dB | 10Hz –125kHz | 152dB | 40kHz – 90kH | 204dB | 5.8 |
| DualSense 115 | 115kHz | -204dB | 10Hz – 150kHz | 150dB | 85kHz - 120kHz | 196dB | 5.3 |
| Name | Resonant Frequency | Receive Sensitivity @ Resonance (dB re 1V/1μPa) | Recommended Receive Frequency Range |
| HydroSense 115/45 | 115kHz | -158dB | 10Hz-150kHz |
| HydroSense 115/19 | 115kHz | -187dB | 10Hz-150kHz |
| HydroSense 080/45 | 80kHz | -157dB | 10Hz-100kHz |
| Name | Resonant Frequency | Receive Sensitivity @ Resonance (dB re 1V/1μPa) | Recommended Receive Frequency Range | Transmit Sensitivity @ Resonance(dB re 1μPa/V) | Recommended Transmit Frequency Range | Maximum Source Level @ Resonance(dB re 1μPa) | Q-Factor |
| SonoFlex 850 | 850Hz | -152dB | 10Hz-2kHz | 131dB | 600Hz-20kHz | 188.5dB | 10.6 |
| SonoFlex 850-HP | 850Hz | -152dB | 10Hz-2kHz | 131dB | 600Hz-20kHz | 191dB | 10.6 |
| SonoFlex 1350 | 1350Hz | -157dB | 10Hz-2kHz | 134dB | 750Hz-4kHz | 191.5dB | 9 |
| SonoFlex 1600 | 1600Hz | -157dB | 10Hz-2.25kHz | 132.5dB | 1.25kHz-3kHz | 190dB | 8 |
| SonoFlex 2200 | 2200Hz | -165dB | 10Hz-6kHz | 131dB | 1.8kHz-6kHz | 188.5dB | 7.3 |
| Name | Resonant Frequency | Receive Sensitivity @ Resonance (dB re 1V/1μPa) | Recommended Receive Frequency Range | Transmit Sensitivity @ Resonance(dB re 1μPa/V) | Recommended Transmit Frequency Range | Maximum Source Level @ Resonance(dB re 1μPa) | Q-Factor |
| SonoTube 008/D12 | 8-12.5kHz | -170dB | 6-17kHz | 139dB | 6-20kHz | 199dB | 1.6 |
| SonoTube 008/D12-UW | 8-12.5kHz | -170dB | 6-17kHz | 139dB | 60Hz-20kHz | 193dB | 1.6 |
| SonoTube 008/D12-DT | 8-12.5kHz | -170dB | 6-17kHz | 139dB | 6-20kHz | 196.5dB | 1.6 |
| SonoTube 008/D12-PA-DT | 8-12.5kHz | -148dB | 6-17kHz | N/A | N/A | N/A | N/A |
| SonoTube 008/D13 | 8-13kHz | -175dB | 7-16Hz | 135dB | 7-16kHz | 195dB | 3.9 |
| SonoTube 008/D13-UW | 8-13kHz | -175dB | 7-16Hz | 135dB | 7-16kHz | 189dB | 3.9 |
| SonoTube 008/D13-DT | 8-13kHz | -175dB | 7-16Hz | 135dB | 7-16kHz | 192.5dB | 3.9 |
| Name | Resonant Frequency | Receive Sensitivity @ Resonance (dB re 1V/1μPa) | Recommended Receive Frequency Range | Transmit Sensitivity @ Resonance(dB re 1μPa/V) | Recommended Transmit Frequency Range | Maximum Source Level @ Resonance(dB re 1μPa) | Q-Factor |
| BroadBand 012 | 12kHz | -191dB | 10Hz-15kHz | 159dB | 8kHz-20kHz | 213dB | 2.67 |
| BroadBand 030 | 30kHz | -181dB | 16kHz-40kHz | 147dB | 15kHz-50kHz | 198dB | 3.5 |
| BroadBand 065 | 65kHz | -193dB | 55kHz-100kHz | 147dB | 50kHz-110kHz | 197dB | 3.8 |
| BroadBand 150 | 150kHz | -203dB | 110kHz-200kHz | 148dB | 110kHz-200kHz | 197dB | 3.6 |
| BroadBand 026/D55 | 26kHz & 55kHz | -190dB | 10Hz-36kHz 50kHz-80kHz | 152dB | 20kHz-80kHz | 199.5dB | 5.5 |
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