SHT30 Metal Waterproof Temperature and Humidity Sensor Probe 50cm Cable I2C

Specifications:

• Sensor IC: Sensirion SHT30
• Primary Parameters: Temperature and Relative Humidity
• Interface: Digital I2C (Standard 0x44 / 0x45 Address)
• Operating Voltage: 2.4V to 5.5V DC
• Temperature Measurement Range: -40°C to +125°C
• Temperature Accuracy: ±0.2°C (typical)
• Temperature Resolution: 0.01°C
• Relative Humidity Range: 0% to 100% RH
• Humidity Accuracy: ±2% RH (typical)
• Humidity Resolution: 0.01% RH
• Cable Length: 50cm (4-wire shielded cable)
• Wire Pinout: Red (VCC), Black (GND), Yellow (SDA), White (SCL)
• Probe Material: Stainless Steel Sintered Mesh Housing
• Response Time: < 8 seconds (tau 63%)
• Operating Temperature (Cable & Housing): -40°C to +80°C

Unlock New Capabilities

• Past Projects If you’ve already experimented with basic indoor climate logging using bare PCB modules like the DHT11, DHT22, or an exposed BME280 on a breadboard, you already understand how to read temperature and relative humidity via microcontrollers — which means you are perfectly ready to upgrade to an sealed sensor probe.
• Feature Upgrade This SHT30 Metal Waterproof Sensor Probe unlocks continuous environmental tracking in harsh, high-moisture environments. It enables you to build automated greenhouse climate controllers, mushroom farm humidity monitors, outdoor weather station data loggers, grain silo humidity monitors, and terrarium environmental automation systems. These are high-humidity deployments that would permanently corrode or short out standard unshielded sensor PCBs.
• Effort Level: Intermediate

Minimum hardware to get started:

• Development Board (Arduino, ESP32, or Raspberry Pi): required to initiate I2C bus communications, send measurement commands to address 0x44/0x45, and calculate humidity/temperature values.
• 4.7kΩ Pull-Up Resistors (2×): required on the I2C SDA (Yellow) and SCL (White) data lines to pull signal levels high for stable serial communication across the 1-meter cable length.
• 2.4V to 5.5V DC Power Source: required to power the internal SHT30 ASIC; can be powered directly from an Arduino's 5V pin or an ESP32's 3.3V supply pin.

 Included in the Box:

• 1× SHT30 Metal Waterproof Temperature & Humidity Sensor Probe

Frequently Asked Questions

• Is this SHT30 probe compatible with 3.3V microcontrollers like the ESP32 and Raspberry Pi Pico?
  Yes, the internal SHT30 IC operates across a wide supply voltage range from 2.4V to 5.5V DC, making it fully compatible with both 3.3V and 5V microcontrollers.
• Can I connect multiple SHT30 probes to a single I2C bus on my Arduino?
  Yes, if the probe exposes the ADDR pin, you can switch between I2C addresses 0x44 and 0x45; otherwise, you can use an I2C multiplexer (like the TCA9548A) to connect up to 8 probes on one bus.
• Does this sensor work natively with Raspberry Pi via Python?
  Yes, you can use standard Python libraries like smbus2 or Adafruit's CircuitPython SHT31/SHT30 library to read temperature and humidity over the Pi's hardware I2C interface.
• Is this SHT30 metal probe compatible with ESPHome or Home Assistant for smart home setups?
  Yes, ESPHome natively supports the sht3xd component platform, allowing easy drag-and-drop integration with Home Assistant using ESP8266 or ESP32 boards.
• What is the recommended operating voltage for this SHT30 probe?
  The probe operates reliably anywhere between 2.4V and 5.5V DC, allowing you to run it directly from a 3.3V logic rail or a 5V power pin.
• How much power or current does the probe draw during active measurement?
  The SHT30 is extremely energy efficient, drawing only around 800µA during active measurement and dropping to under 0.2µA in idle sleep mode.
• Can I power this sensor directly from a 3.7V LiPo battery in remote IoT loggers?
  Yes, because the operating range extends down to 2.4V DC, a single 3.7V LiPo battery can power the SHT30 probe directly without needing additional voltage regulation.
• What are the four wire color connections for this SHT30 probe?
  The standard pinout is Red for VCC (Power), Black for GND (Ground), Yellow for SDA (I2C Data), and White for SCL (I2C Clock).
• Do I need external pull-up resistors for the I2C lines?
  Yes, because of the capacitance added by the 1-meter cable, you should add two 4.7kΩ pull-up resistors connecting SDA and SCL to the VCC rail.
• How long can I extend the sensor cable beyond 50cm?
  You can extend the cable up to 3–5 meters by using shielded twisted-pair cabling and lowering the I2C clock frequency (e.g., to 100kHz) alongside stronger pull-up resistors (2.2kΩ).
• Which Arduino library is recommended for reading data from this SHT30 probe?
  The "Adafruit SHT31 Library" or "Sensirion I2C SHT3x" libraries available in the Arduino Library Manager work out of the box with SHT30 sensors.
• How does the code verify that measurement data received over I2C is not corrupted?
  The SHT30 transmits a CRC-8 checksum byte after every 2-byte measurement packet, allowing your library code to automatically detect and discard corrupted readings.
• Can I adjust the repeatability or measurement precision settings in software?
  Yes, the SHT30 supports high, medium, and low repeatability modes via I2C commands, allowing you to trade off a tiny amount of noise for faster response and lower energy consumption.