SH-20 is a Sub-Bottom Profiler, produced by Senbondenki Co. Ltd., in Japan.
This is unique SBP combining with low frequency transducers (Tx/Rx) and a high frequency transducer. The low frequency signature of 5 - 10 kHz can penetrate up to around 10m below seabed in shallow water up to 80m WD. The high frequency signature of 200 kHz detects the seabed simultaneously. Thus, the thickness of the most-top soil can be accurately determined.
As pictures shown, this equipment is not modern, but its performance is not out-of-date. For digital data processing, A/D processor can be connected as well.
| Equipment name | SH-20 |
|---|---|
| Manufacturer | Senbondenki Co. Litd. |
| Type of equipment | Sub-Bottom Profiler |
| Applicable water depths | 0.5m～80m WD |
| Frequency and Beam Width | High Frequency, signature 200kHz, 6° , Low Frequency signature 5,7,10kHz, 50° |
| Recording methods | Paper and Digital |
| Applicable boat/ship | small boat is applicable |
| Advantages | Easy to outfitting and low cost |