7Semi DS18B20 Waterproof Digital Temperature Probe with 2M Cable

7Semi DS18B20 waterproof digital temperature probe with 2m cable, based on the widely used DS18B20 digital temperature sensor IC.

Overview

The probe is based on the DS18B20 digital temperature sensor IC, a widely used digital temperature sensor with a waterproof probe enclosure and 2-meter cable.

• Measures:

  • Temperature only

• Provides:

  • Digital output via 1-Wire interface

• Designed for:

  • Remote and harsh environment temperature sensing

The probe format allows measurement in liquids, outdoor, or inaccessible locations.

Working Principle

Temperature Sensing

• Uses an integrated semiconductor temperature sensor

• Converts temperature into a digital value internally

• No external ADC required

12-bit ADC converts analog temperature signal into digital data

Output is transmitted over 1-Wire protocol

1-Wire Communication

• Uses a single data line + ground

• Each sensor has a unique 64-bit ID

Multiple sensors can share the same bus.

Measurement Characteristics

• Temperature range: 55C to +125C

• Accuracy:

  • 0.5C (10C to +85C typical)

• Resolution: programmable:

  • 9-bit to 12-bit

  • 12-bit 0.0625C resolution

Electrical Characteristics

• Supply voltage: 3.0V to 5.5V

• S

  Powered via VCC pin

2. Parasite Power Mode

• Powered through data line (DQ)

• No separate VCC required

Useful for minimal wiring applications.

Communication Interface

1-Wire Protocol

• Single data pin (DQ)

• Requires:

  • Pull-up resistor (~4.7k typical)

Data Transmission

• Master (microcontroller) initiates communication

• Sensor responds with:

  • Temperature data

  • Unique ID

Internal Features

Unique 64-bit Address

• Each sensor individually identifiable

• Enables multiple sensors on one bus

Programmable Resolution

• Trade-off between:

  • Speed

  • Precision

figuration settings

Retains data after power loss

CRC Error Checking

• Ensures reliable data communication

Probe Design Characteristics

Waterproof Stainless Steel Probe

• Sealed metal enclosure

• Protects sensor from:

  • Water

  • Dust

  • Corrosion

2-Meter Cable

• Enables:

  • Remote sensing

  • Flexible installation

Pre-Wired Connections

Typical wires:

• Red VCC

• Black GND

• Yellow Data (DQ)

Environmental Performance

• Suitable for:

  • Liquids (water, non-corrosive fluids)

  • Outdoor environments

• High durability due to sealedsion Time

  • Depends on resolution:

    • 12-bit ~750 ms

    • Lower resolution faster

  Stable Output

  • Digital output reduces noise

  • Reliable over long cable distances (with proper wiring)

  Limitations

  • Not suitable for:

    • Extremely fast temperature changes (due to probe thermal lag)

  • Accuracy affected by:

    • Poor thermal contact

    • Cable interference (if not shielded)

  • Parasite mode less stable for long cables

  Functional Role

  The module acts as a:

  • Digital temperature probe

  • Remote sensing device

  • Multi-point temperature monitoring node

  Summary

  The 7Semi DS18ust digital temperature sensing solution that:

  • Uses 1-Wire digital communication

  • Provides high-resolution temperature data

  • Supports multi-sensor networks via unique IDs

  • Features a sealed waterproof probe with 2m cable

  • Offers reliable and noise-resistant measurements