Underwater Ultrasonic Communication Sensor, 0.1-50m, UART / RS485

Name: Underwater Ultrasonic Communication Sensor, 0.1-50m, UART / RS485
Brand: Such.com
SKU: SUCH-US-C01A
Price: 160.46 USD
Availability: InStock
Rating: 5.0 (1 reviews)

1 review(s) | Add your review

SKU: SUCH-US-C01A

$160.46

● Output UART Controlled / RS485 ● Comm. 1–2000 cm, 360°, ≥99% ● Protocol Modbus-RTU, configurable ● Protection IP68 (5 m / 168 h)

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Overview
Spec
Application
FAQ
Reviews

Overview

This ultrasonic communication sensor operates on 5 V DC, supports UART (TTL 3.3 V) and optional RS485/Modbus-RTU, with a 1–2000 cm communication range, 360° angle, ≥99% accuracy, and ≤510 ms delay. It features reverse polarity protection, ESD protection, and configurable baud rates up to 115200 bit/s. IP68-rated (5 m water pressure, 168 h), it is ideal for underwater communication, remote control, and industrial automation.

Feature

Dual Communication Interfaces: UART TTL 3.3 V and optional RS485 with Modbus‑RTU.
Full 360° Communication Angle: 1–2000 cm range with ≥99% communication accuracy.
Deep-Water IP68 Protection: Withstands 5 m water pressure for 168 hours, 100% RH.
Configurable Modbus‑RTU Control: Slave address, baud rate 4800–115200, data bits 4/6/8.
Robust Electrical Protection: Reverse polarity, ±4/±8 kV ESD, ≤50 mVpp ripple.

Dimension

Ultrasonic communication sensor dimensions drawing.

Wiring

Ultrasonic communication sensor wiring diagram.

Lead Number	Lead Color	Lead Name	Lead Description	Voltage Level
1	Red	VCC	Power input lead	See Operating Voltage Range
2	Black	GND	Ground lead	0 V (reference)
3	Yellow	RX/B	UART trigger input / RS485 B	0–3.3 V typ., 5 V max
4	White	TX/A	UART output / RS485 A	0–3.3 V typ., 5 V max

Spec

Output Type	UART Controlled / RS485 (optional)
Operating Voltage Range	4.75–5.25 V DC
Typical Operating Voltage	5 V DC
Reverse Polarity Protection	Supported
Input Ripple	≤50 mVpp
Input Noise	≤100 mVpp
Communication Line ESD	±4 / ±8 kV (compliant with IEC 61000-4-2)
Baud Rate	Default 115200 bit/s (configurable)
Standby Current	<20 mA
Maximum Operating Current	<120 mA
Peak Current	≤500 mA (peak)
Maximum Communication Distance	1–2000 cm
Communication Angle	360°
Communication Accuracy	≥99%
Remote Control Delay	≤510 ms
Repeat Communication Cycle	≥900 ms
Power-On Time	≤200 ms
Operating Temperature Range	1–50 °C
Typical Operating Temperature	25 °C
Operating Humidity	100% RH
Dust And Water Protection	IP68 (withstands 5 m water pressure for 168 h)
Storage Temperature Range	-30–70 °C
Typical Storage Temperature	25 °C
Storage Humidity Range	≤90% RH
Storage Humidity	65% RH (typical)
Module Housing	ASA, black

Note:

Test: DC 5 V, 1000 ms trigger cycle.
Comm. test: 20×12 m pool, 1.3 m depth, calm, no flow/obstacles, flat bottom.
Delay test: 115200 baud, no feedback; delay ↑ with distance.
0–39°C ≤90% RH; 40–50°C max natural RH; non-cond. (low-temp underwater).

Application

Underwater Transmission

Ultrasonic communication sensor for subsea pipeline monitoring and underwater wireless signal transmission.

Subsea Monitoring

Hydraulic Gate

FAQ

Q1: Which supply voltage and current profile does this ultrasonic communication sensor require? ❯

A: This ultrasonic communication sensor operates on 4.75–5.25 V DC, with a typical voltage of 5 V DC. It supports reverse polarity protection, and the input ripple should stay ≤50 mVpp while input noise should stay ≤100 mVpp. Standby current is <20 mA, maximum operating current is <120 mA, and peak current can reach ≤500 mA. Power-on time is ≤200 ms, so allow at least 0.2 s before expecting valid communication.

Q2: How does this ultrasonic communication sensor handle UART, RS485, and Modbus-RTU? ❯

A: This ultrasonic communication sensor supports UART Controlled and RS485 output types. Its UART interface is TTL 3.3 V, default baud rate 115200, with 8 data bits, no parity, 1 stop bit. It also supports Modbus-RTU, default sensor address 0x01 (configurable), read function code 0x03, write function code 0x06, and CRC-16/MODBUS. Baud rate is configurable via register 0x0201, and feedback can be enabled via register 0x023F.

Q3: How far and at what angle can this ultrasonic communication sensor communicate? ❯

A: This ultrasonic communication sensor offers a maximum communication distance of 1–2000 cm with a communication angle of 360° and communication accuracy ≥99%. The remote control delay is ≤510 ms, and the repeat communication cycle is ≥900 ms. The communication test was performed in a 20×12 m pool, 1.3 m depth, calm water, no flow or obstacles, flat bottom, so real-world performance may vary with reflections and turbulence.

1 review(s)

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From: Ben Yates | Date: 9/30/2026 8:28 AM

Can I connect this ultrasonic communication sensor to my existing controller?

Hi, I’m working on an underwater monitoring setup and already have an RS485 controller in place. I’m interested in this sensor, but I’m not sure if it will work with the settings I’m using now. Does the RS485 version use Modbus RTU, and can I change the communication settings if needed?

A manager responded to this review

Hi, yes, the RS485 version uses Modbus RTU. The default baud rate is 115200 and the default address is 0x01, and both can be changed. If you send us the settings from your controller, we can check them for you.