1. Product Overview
What Is the KWD Series Depth Finder?
The KWD Series Depth Finder is an advanced underwater measurement device developed by KACISE, based on ultrasonic ranging technology. It is designed for accurate underwater distance and depth measurement.
The system supports various KACISE ultrasonic transducers and sensors, enabling real-time reading of transducer status and echo signals. It also supports external power supply and communication interfaces, providing a flexible and reliable solution for underwater depth data acquisition.
The KWD series depth finder is widely used for buoys, boats, rivers, reservoirs, and other water depth monitoring applications, making it an ideal depth finder for both fixed installations and mobile platforms.
2. KWD Series Depth Finder Specifications Comparison
| Model | KWD100 | KWD110 | KWD200 | KWD300 | KWD400 |
| Measuring Range | 100 m (MAX) | 70 m (MAX)5 m (MIN) | 100 m (MAX) 2 m (MIN) | Customizable | 10 m (MAX) |
| Measurement Accuracy | ±0.5% FS | ±1~3% FS | Customizable | Customizable | ±0.5% FS |
| Power Supply | 18650 battery 12–25.6 VDC | 12 VDC / 24 VDC / 220 VAC | 12 VDC | 9–36 VDC | 24 VDC |
| Output Signal | / | 4–20 mA Relay | / | / | / |
| Communication Interface | RS485 Modbus | RS485 / RS232 Modbus | RS485 Modbus | RS485 Modbus | RS485 Modbus |
| Protection Rating | IP68 | Probe IP68 Display IP65 | IP68 | IP68 | IP68 |
| Installation Method | Handheld Thread-mounted probe | Split wall-mounted Thread-mounted probe | Standard wiring Thread-mounted probe | Standard wiring Thread-mounted probe | Standard wiring Thread-mounted probe |
| Mounting Thread | M33 / M36 / M50 / M80 | G3/4 | M33×1.5 | Customizable | Customizable |
| Operating Temperature | -20 to 60 °C | -20 to 60 °C | 0 to 60 °C | -5 to 60 °C | -5 to 60 °C |
3. Key Selection Parameters and Application Scenarios
| Parameter | Description | Application Guidance |
| Measuring Range | The maximum and minimum depth values measurable by the depth finder. | A 100m range is suitable for reservoirs, lakes, and marine environments. A 10m range is more appropriate for pools, rivers, and shallow water applications. |
| Measurement Accuracy | The deviation between measured depth and actual depth. | A ±0.5% FS accuracy means that for a 100m range, the maximum error is only 0.5 m. In applications such as water conservancy projects and channel dredging, high accuracy is critical, as even small errors can affect project quality. |
| Protection Rating | Indicates resistance to dust, water, and external intrusion. | IP68 represents a high protection level, allowing long-term underwater operation. The KWD400 with IP68 protection is suitable for underwater robots and long-duration submerged applications. |
| Communication Interface | The data transmission method between the depth finder and external systems. | MODBUS is a widely used industrial communication protocol. RS485 offers strong anti-interference capability and supports long-distance data transmission, making it suitable for engineering applications. |
| Operating Temperature | The ambient temperature range in which the depth finder can operate normally. | The KWD series supports operation from -20 °C to 60 °C, enabling use in cold regions as well as tropical environments. |
4. Step-by-Step Selection Process
Step 1: Determine the Required Measuring Range
- Identify the maximum water depth of the application.
- Select a model that fully covers this maximum depth.
- Example: For a measurement depth of 45 m, a 50 m range sensor is recommended.
Step 2: Define Output Requirements
- Confirm the communication protocol or signal type supported by the control system
(e.g., Modbus protocol, RS485 interface, or 4–20 mA analog input). - Select the preferred data transmission method accordingly.
Step 3: Consider Environmental Conditions
- Evaluate operating conditions such as required accuracy, temperature variations, and application type.
- Select parameters based on Section 3: Key Selection Parameters and Application Scenarios.
Step 4: Evaluate Installation Compatibility
- Download the product datasheet.
- Confirm installation feasibility based on overall dimensions and mounting thread size.
Step 5: Consult Technical Experts
- If uncertainty remains, consult the KACISE technical team.
Professional engineers can provide tailored recommendations based on specific application requirements and site conditions.
5. Typical Application Scenarios
| Application | Recommended Model | Reason |
| Reservoir Depth Monitoring | KWD100 | IP68-rated probe suitable for various water depths; handheld display allows convenient operation. |
| Boat-Mounted Depth Measurement | KWD110 | Wall-mounted display is ideal for installation in the cabin, allowing real-time depth monitoring to prevent grounding risks—an excellent depth finder for boat applications. |
| Underwater Robots | KWD400 | Fully sealed IP68 design; optional 360° scanning version enables real-time underwater environment mapping. |
6. Summary
To help you quickly select the most suitable KWD series depth finder, the key points are summarized as follows:
First, the KWD series depth finders offer wide measuring range, high accuracy, and strong environmental adaptability, significantly improving the efficiency and reliability of underwater depth measurement.
Second, by comparing KWD series specifications, users can initially narrow down models based on measuring range, accuracy, and power supply requirements.
Third, understanding core parameters—such as measuring range, accuracy, and protection rating—ensures optimal matching between the device and the application scenario.
Finally, following the five-step selection process (range definition → output confirmation → environmental consideration → installation evaluation → professional consultation) helps avoid selection errors. The typical application table provides direct references for common use cases.If you still have selection questions or require a customized solution for specific measurement needs, feel free to contact us. Our professional team will provide one-on-one guidance to help you choose the most cost-effective depth finder solution.
If you are unsure which model to choose, feel free to contact us with your application details for technical support.
