HY1500 digital echo sounder is portable survey equipment for surveying in inland water, rivers, coastal areas and in other rugged conditions. Digital processing enables the instrument to offer fully automatic bottom digitizing capabilities. A RS-232 serial port enables communication to some external computer and makes the auto surveying possible. Specifications: Frequency: 208 KHz Survey range: 0.3m-100m Accuracy: ± (. 02m+0.1%*depth)%*depth)%*depth) Resolution: 1cm Output power: 80Watts Power required: 10VDC-15VDC (Built-in rechargeable battery) Transducer: 208 KHz-8deg. Recording: LCD display Data output: RS232 Standard Niscellaneous: TVG Draft/Velocity/Blanking adjustable Composition: CONSOLE Dimension: 228X 160X 80 mm Weight: 3KG Transducer: Dimension: Φ68 X 80 mm80 mm80 mm Weight: 0.8kg Cable length: 80 (adjustable) Supporting Tube: Length: Φ30mm X 0.35m0.35m0.35m 4 pieces of metal alloyed poles Weight: 1.6 KG