High-precision water pressure and depth sensor for depth measurement with temperature measurement

Specifications

Basic Information

• Core Model: MS583730BA01-50
• Sensor Type: Absolute Digital Pressure / Altimeter Sensor Module

Measurement Performance

• Pressure Measurement Range: 30 bar (equivalent to 30,000 mbar)
• Overpressure Range: 50 bar
• Measurement Accuracy (Pressure): ±1.5 mbar
• Resolution (Pressure): 0.2
• Output / Conversion: 24-bit ADC (Analog-to-Digital Converter)
• Temperature Measurement Range: -20 to 85°C (equivalent to -4 to 185°F)
• Refresh Rate: 0.5 ms (typical value)

Electrical Characteristics

• Supply Voltage: 1.5–3.6 V
• Peak Current: 1.25 mA

Physical & Environmental Characteristics

• Housing Material: Aluminum Alloy
• Recommended Mounting Hole Diameter: 8 mm
• Module Dimensions (Sample Packaging): 75.5 mm (L) × 20 mm (W)
• Cable Length: 25 cm ± 5 cm
• Sensor Weight: 7 g (Aluminum Alloy)

Interface & Communication

• Output Interface: I2C (Inter-Integrated Circuit)
• Pin Definition (Wire Colors):
  • Black (GND)
  • Red (VCC)
  • Yellow (SCL)
  • Green (SDA)

Compliance

• Environmental Certification:
  • Compliant with RoHS 2011/65/EU (Lead-free exemption included)
  • ELV 2000/53/EC (Lead-free exemption included)
• Hazardous Substance Restrictions:
  • Does not contain REACH SVHC substances
  • Bromine content < 900 PPM
  • Free of BFR / CFR / PVC

01 Electrical Connection Instructions

a. Pin and Voltage Matching: The sensor uses a 4-pin design. The wire colors have fixed functions: black for GND (ground), red for VCC (3.3V power supply), yellow for SCL (serial clock), and green for SDA (serial data). Connecting VCC to 5V or other non-specified voltages is strictly prohibited, as it will burn out the internal 24-bit ADC chip. When connecting to 5V logic level devices (such as Arduino UNO), an additional 3.3V-5V I2C level conversion circuit must be added; direct connection is not allowed.

b. I2C Interface Configuration: In some scenarios, a 4.7K pull-up resistor needs to be connected in series with the SCL and SDA pins to 3.3V to ensure communication stability. The recommended I2C communication distance is ≤40cm. For ultra-long-distance transmission, an I2C extension module is required to avoid data loss or communication interruption.

02 Installation and Protection Requirements

a. General Installation Specifications: Due to its small size, the sensor must be installed in a stable location free from severe vibration to prevent damage from external impacts. If integrated into a sealed enclosure, ensure that the data/power lines at the sensor's tail are sealed (e.g., with water-tight silicone grease) to prevent external liquids from entering the interface.
b. Special Requirements for Underwater Use: When used in underwater scenarios (e.g., ROV/AUV, aquaculture), the entire sensor and its connectors must be waterproofed. In shallow water, the sensor can be fully submerged, but the data lines must be wrapped with waterproof tape or have waterproof connectors. Immersing the sensor in liquid without proper waterproofing is strictly prohibited to prevent short circuit damage.

03 Environmental Adaptability Limitations

a. Temperature and Pressure Range Matching: The sensor's operating temperature range is -20~85°C (-4~185°F). It must not be used in environments exceeding this temperature range, otherwise it will lead to decreased measurement accuracy or hardware failure. The appropriate range model must be selected according to the actual scenario—the 2-bar range model (MS583702BA01-50) is suitable for low-to-medium pressure scenarios (such as pond water level and shallow water environment monitoring), and the 30-bar range model (MS583730BA01-50) is suitable for high-pressure scenarios (such as industrial hydraulics and 300-meter water depth detection). Cross-range applications are not permitted.

b. Corrosive Environment Protection: Although the sensor housing has basic corrosion resistance, when exposed to strong acid and alkali liquids for extended periods (such as industrial waste liquid and high-concentration aquaculture disinfectants), an additional anti-corrosion protective sleeve must be installed to prevent the housing from rusting and affecting measurement accuracy.

04 Debugging and Operation Specifications

a. Preparation for Host Computer Debugging: When connecting the USB-TTL serial port module to the computer, the corresponding driver must be installed first. For the CH340 module, install the "Three-in-One Driver"; for the CP2102 module, install the "Six-in-One Driver". After the driver installation is complete, confirm the serial port number (e.g., COM5) in "Device Manager - Ports".

b. Serial Port Parameter Settings: When opening serial port debugging assistants such as SSCOM5.13.1, the baud rate must be set to 115200bps, data bits 8 bits, stop bits 1 bit, and no parity. Uncheck "HEX Display" (sensor outputs ASCII data). After clicking "Open Serial Port", the device will automatically send temperature and pressure data. (Pressure) and (Deep) data do not require additional control commands.

c. AT Command Usage Rules: Before executing AT commands (such as calibration or setting data rate), you must first send "AT+CFG" to enter configuration mode. When sending the command, you must check "Add carriage return and line feed". When setting the data rate (AT+RRATE=%d), the rate range must be controlled between 10 and 60000ms. When setting the filter K value (AT+KFILT=%.2f), the K value must be between 0 and 1.0 (the closer K is to 1, the more stable the data, but the slower the response). After the operation is completed, you must send "AT+EXIT" to exit configuration mode.