DS18B20 Waterproof Temperature Sensor Probe 1m Range -7Semi

🔬 Sensor Architecture
Based on a digital silicon temperature sensor IC (DS18B20 chip) inside a stainless steel waterproof probe.
The probe is sealed with epoxy resin for water resistance.
Uses 1-Wire protocol, meaning:
➤ Only one data line + GND required (plus VCC optional).
🔍 Extended Features
Unique 64-bit ID:
Each sensor has a factory-lasered unique address, allowing multiple sensors on the same wire.
Parasite Power Mode:
Can operate without external power (uses data line power).
Multi-drop Capability:
Multiple DS18B20 sensors can be connected to a single Arduino pin.
Programmable Resolution:
• 9-bit to 12-bit selectable
• Higher resolution = slower conversion
📊 Detailed Specifications
Parameter
Value
Operating Voltage
3.0 V – 5.5 V
Temperature Range
–55°C to +125°C
Accuracy
±0.5°C (–10°C to +85°C)
Resolution
9–12 bit (0.5°C to 0.0625°C)
Conversion Time
93.75 ms – 750 ms
Interface
1-Wire
Cable Length
~1 meter (waterproof probe)
Probe Material
Stainless steel
Waterproof Rating
Typically IP67
⚙️ Pin / Wire Identification
Typical wire colors:
Red → VCC
Black → GND
Yellow/White → DATA
📌 Important:
Add a 4.7 kΩ pull-up resistor between DATA and VCC.
🧠 How It Works (Deep Explanation)
Internal temperature sensor measures heat.
Converts temperature into digital data internally (no ADC needed externally).
Sends data over 1-Wire bus using timing-based communication.
Microcontroller reads data using addressed communication.
📐 Data Format
Output is digital temperature value in °C.
No need for analog conversion.
Example resolution levels:
• 9-bit → 0.5°C
• 12-bit → 0.0625°C
🔗 Multi-Sensor Setup
Connect multiple DS18B20 sensors in parallel on same data line.
Each sensor is identified using its unique 64-bit ROM code.
📌 Useful for:
Temperature mapping across multiple locations
📌 Applications (Extended)
Water temperature monitoring (tanks, aquariums)
Industrial liquid temperature sensing
Weather stations
Food processing & refrigeration
Boilers, pipelines, HVAC systems
IoT remote temperature logging
⚠️ Important Notes
Pull-up resistor is mandatory (4.7kΩ typical).
Cable length limitations: Long wires may require shielding or lower speed.
Waterproof ≠ chemical-proof: Avoid corrosive liquids.
Response Time: Slightly slower due to metal probe housing.
Parasite Mode: Less stable for long cables — external VCC preferred.
🆚 Comparison Insight
More accurate than DHT11
More robust than thermistors (no calibration needed)
Simpler than thermocouples (but lower max temperature)
🛠 Summary
Type: Digital waterproof temperature sensor
Interface: 1-Wire
Accuracy: High (±0.5°C)
Special Feature: Unique ID + multi-sensor support
Best Use: Reliable temperature sensing in liquids/environments