SKU: SENS-3840
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Sonoff DS18B20 Waterproof Temperature Sensor Probe w/ 1m Cable - 1-Wire Interface

₹340.00 (Inclusive of all taxes)
Out of Stock

This Sonoff-branded DS18B20 waterproof temperature sensor probe provides a 1-Wire digital interface for precise temperature monitoring from -55°C to +125°C. It is designed for direct compatibility with Sonoff TH10A/TH16A smart switches and can be integrated with Arduino, Raspberry Pi, and other 3.3V/5V microcontroller systems.

Features

  • High-accuracy DS18B20 digital temperature sensor chip with 9 to 12-bit user-selectable resolution.
  • Stainless steel waterproof probe housing (6mm diameter x 50mm length) for durable, moisture-resistant installation.
  • Single-bus (1-Wire) digital interface simplifies wiring and communication with host controllers.
  • Includes 1-meter cable for flexible placement and connection.
  • Wide operating voltage range from 3.0V to 5.5V DC for broad system compatibility.

Out of stock

Description

The sensor utilizes the industry-standard Maxim Integrated DS18B20 digital temperature sensor IC, providing calibrated digital output directly over a 1-Wire bus. This eliminates signal conditioning requirements and ensures stable, noise-immune readings. The sensing element is hermetically sealed within a SUS-304 grade stainless steel tube, offering IP68-equivalent protection against water, moisture, and corrosion in demanding environments.

Designed for seamless integration with the Sonoff eWeLink ecosystem for remote monitoring and automation, the probe also functions as a standalone digital temperature sensor for any microcontroller platform supporting the 1-Wire protocol, such as ESP32, STM32, or industrial PLCs with appropriate interface modules.

Key Features

  • Original DS18B20 sensor chip ensures measurement accuracy and protocol compliance.
  • Stainless steel probe construction provides robust physical and environmental durability.
  • Single-bus digital output minimizes wiring complexity and is highly resistant to electrical noise.
  • Wide operating temperature range from -55°C to +125°C suitable for harsh industrial and outdoor applications.
  • Flexible 9 to 12-bit resolution allows users to optimize between measurement speed and precision.
  • Broad 3.0V to 5.5V supply range supports both 3.3V and 5V logic systems without level shifting.

Applications

  • Remote temperature monitoring and control with Sonoff TH10A/TH16A smart switches for HVAC or appliance automation.
  • Embedded temperature sensing in liquid tanks, soil, or outdoor weather stations due to its waterproof construction.
  • Industrial process monitoring and machine condition sensing where reliable digital output is required.
  • DIY environmental control systems for aquariums, terrariums, or greenhouses using Arduino or Raspberry Pi.

Technical Specifications

Sensor ModelDS18B20
Measurement Range-55°C to +125°C
Accuracy±0.5°C (typical from -10°C to +85°C)
ResolutionUser-selectable 9 to 12 bits
Output Interface1-Wire Digital
Supply Voltage3.0V to 5.5V DC
Probe MaterialStainless Steel
Probe Dimensions6mm diameter x 50mm length
Cable Length1 meter
Connector Diameter2.5 mm
Operating Temperature-55°C to +125°C

Frequently Asked Questions

What is the operating voltage range for this DS18B20 sensor?

The sensor operates from 3.0V to 5.5V DC, making it compatible with both 3.3V and 5V microcontroller systems like Arduino, ESP32, Raspberry Pi, and the Sonoff TH series switches without requiring a level shifter.

How do I connect and read data from this 1-Wire sensor?

The DS18B20 uses a single-bus (1-Wire) interface. Connect the red wire to VCC (3-5.5V), black to GND, and yellow (data) to a digital GPIO pin on your controller. Use a 4.7kΩ pull-up resistor between the data line and VCC. Libraries like OneWire and DallasTemperature are available for Arduino and other platforms to simplify communication.

Is the probe fully waterproof, and what is it made of?

Yes, the sensing element is hermetically sealed inside a high-quality SUS-304 stainless steel tube, providing IP68-level waterproof, moisture-proof, and anti-rust protection. This allows for direct immersion in non-corrosive liquids or installation in humid environments.

Can I use this sensor with microcontrollers other than Sonoff devices?

Absolutely. While branded for Sonoff compatibility, it is a standard DS18B20 sensor. It can be used with any development board or industrial controller that supports the 1-Wire protocol, including Arduino, Raspberry Pi, ESP8266/32, STM32, and PLCs with digital input modules.

Package Includes

  • 1 x DS18B20 Waterproof Temperature Sensor Probe with 1m Cable

Additional Information

Weight 0.028 kg
Dimensions 11 × 8 × 1 cm