Htd-68 Spherical Hydrophone Marine Bioacoustics Research Hydrophone. Omnidirectional Response: Offers omnidirectional response up to 200kHz with low noise and durability. Wide Frequency Bandwidth: Frequency bandwidth ranges from 1 Hz to 200 kHz for versatile applications. IP68 Waterproof Rating: Designed with IP68 rating for maximum protection in marine environments. Customizable Materials: Available in 316 Stainless Steel or Titanium Alloy for acoustic performance. Deep Sea Operation: Supports maximum operating depth up to 1000 meters. OEM and ODM Services: Full customization available from designs, samples, or minor modifications. ISO Certified Quality: Manufactured under ISO9001:2015, ISO40001:2018, and ISO14001 standards. Versatile Applications: Suitable for sonobuoys, positioning, noise measurement, and bioacoustics research.