The newest model in our line of spectral backscattering sensors, the HydroScat-4 measures backscattering at 4 wavelengths of your choice. Like HOBI's other backscattering sensors, the HS-4 offers sensitivity and dynamic range that are available nowhere else. Its superior optical and electronic design provide accurate measurements anywhere from the clear open ocean to turbid coastal and estuarine waters, while effectively rejecting background light. and wave modulation. And while maintaining the optical performance of the six-channel HS-6, with only two fewer channels, the HS-4 is a little over 1/3 the size of the HS-6. 

But the HS-4's features extend well beyond its high-quality measurements. It also includes a sophisticated data logger (with optional multi-Megabyte flash memory), internal rechargeable batteries, and an optional integrated anti-fouling shutter for long-term deployment. Yet it is nearly as easy to use as a flashlight. Simply flip a switch and it starts logging data internally. The internal batteries provide up to 15 hours of continuous operation. Or set it up to log in autonomous burst mode for periods of many days (months, with external batteries). If you prefer real-time data collection, the HS-4 is easy to connect directly to a computer, where data can be displayed and stored using our highly acclaimed HydroSoft software package. Simply put, the HydroScat-4 is the most advanced, robust, accurate, and easy-to-use sensor of its kind in the world. Nothing comes close. Contact us today for more information and to get a quote on our unbeatable price.

• Measures the backscattering coefficient at four wavelengths
• Unmatched sensitivity
• Internal computer and batteries for autonomous operation
• Accurate depth sensor
• Choose from among the following wavelengths: 420, 442, 470, 488, 510, 532, 555, 589, 620, 671, 676, & 852 nm

• Ocean-optical research (measures b_b at four wavelengths)
•  Sediment transport (estimate mass concentration)
• Moorings (fully autonomous operation, integrated anti-fouling shutter available)
• Environmental monitoring (measure water clarity/turbidity)
• Ocean lidar "sea-truth" (profile anywhere inexpensively)
• Ocean surveying (easily incorporated into tow packages)