Depth Sounders

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Protable Water Depth Meter, 0~500m

SISCO-WDM-RMCSL01

The SISCO portable water depth meter is a professional water depth measurement tool that combines high precision, portability, and intelligent operation. Utilizing ultrasonic technology, it can easily handle complex water conditions, from still water to currents up to 5 meters per second. It offers multiple ranges from 100 to 500 meters, boasting an accuracy of up to ±0.5% and a minimum resolution of 1 mm, ensuring accurate and reliable data. The depth to water meter equipped with an LCD display and an intuitive numeric keypad supports both automatic and manual measurement modes, enabling instant measurement. It is an ideal choice for field water monitoring and surveying.

$627.50

Ultrasonic Portable Depth Sounder

SISCO-DS-CZMSS

Buy a high-quality ultrasonic portable depth sounder at SISCO. This compact depth sounder offers 100m and 150m range options with high accuracy (≤±0.5%) and fine resolution (≤1mm). Featuring a color TFT LCD, this depth measurement tool provides clear, easy-to-read data and supports up to 10,000 historical records for convenient review. Widely used in hydropower, river surveys, and hydrological monitoring, this ultrasonic depth sounder delivers reliable performance in various water measurement applications.

$682.15

Portable Depth Sounder for Water Depth

SISCO-DS-SM

High-quality portable depth sounder for sale. This model offers two options: SM-5 and SM-5A. The SM-5 features a built-in transducer with a waterproof depth of up to 50m, operating at a 200kHz frequency and a 24° beam angle. The SM-5A is equipped with an external transducer and a 3.6m cable, using the same 200kHz frequency but with an optimized 15° beam angle for improved precision. The measuring range of the depth sounder reaches 2~260 ft (0.6~79 m), suitable for navigation, fishing, diving, and coastal surveying applications.

$812.38

Still struggling to find a suitable depth sounder? SISCO offers high-quality depth sounders designed for precise and efficient underwater depth measurement. Built with advanced ultrasonic technology, our portable depth sounders are widely used in marine navigation, fishing, hydropower monitoring, river surveying, and coastal research. Whether for professional or field use, these compact water depth measurement tools deliver fast, stable, and accurate readings, even in complex water environments.

What is a depth sounder and how does it work?

A depth sounder, also known as an ultrasonic depth meter or echo sounder, is an instrument that measures water depth by using ultrasonic acoustic reflection. It works by emitting high-frequency sound waves through a transducer (also called a probe) into the water. When these sound waves hit the seabed or riverbed, they reflect off the transducer. The device then calculates the vertical distance between the water surface and the bottom based on the time delay between transmission and echo reception, using the known speed of sound in water (approx.1500 m/s). The built-in processor calculates depth (D) based on the time (T) it takes for sound waves to propagate and the speed of sound in water (V, typically 1500m/s): D = (V × T) / 2.

For instance, if the total travel time of the ultrasonic pulse is 0.2s, the water depth is computed as: Depth = (1500 m/s × 0.2 s) / 2 = 150 meters.

What are the applications of depth sounders?

Depth sounders play an essential role in a wide range of marine, industrial, and environmental applications:

Hydropower Monitoring: Accurately measure reservoir and dam water levels to ensure safe and efficient power generation.
Underwater Topography Surveying: Quickly map seabed or lakebed contours to support marine engineering, geological research, and resource exploration.
Water Sampling and Environmental Monitoring: Determine precise water depths to identify sampling layers and monitor temperature, flow, and sediment data across different depths.
River and Coastal Surveying: Collect real-time depth profiles to analyze channel evolution, enhance flood prevention planning, improve navigation safety, and support ecological conservation.
Fishing and Diving Operations: Used by both professionals and enthusiasts to locate ideal fishing zones or ensure diving safety with accurate underwater depth readings.

Discover SISCO depth sounders

From compact portable depth sounders like the SISCO-DS-SM-5 series to advanced ultrasonic measurement instruments, SISCO delivers durable, high-performance solutions tailored for marine research, hydrology, and navigation. Each model combines precision engineering, long battery life, and user-friendly operation, ensuring reliable measurements—anytime, anywhere.