DS18B20 Temperature Sensor Applications
Standard DS18B20
The standard DS18B20 package is designed for PCB mounting and embedded applications. With 3 pins (VCC, DATA, GND) and a compact through-hole design, it integrates seamlessly into microcontroller projects, industrial control boards, and laboratory instruments. Programmable resolution from 9-bit to 12-bit allows you to balance conversion speed and measurement precision. An operating voltage of 3.0V–5.5V ensures compatibility with both 3.3V and 5V logic systems.
Waterproof DS18B20 Probe
Encased in a stainless steel housing with epoxy sealing, the waterproof DS18B20 probe is designed for liquid, outdoor, and harsh-environment temperature monitoring. Typical applications include liquid tanks, refrigerated trucks, cold chain logistics, aquariums, and weather stations. The sealed probe design provides protection against moisture, condensation, and mechanical stress while maintaining ±0.5°C accuracy. Multiple cable lengths are available, with a standard 1-meter lead wire and 3-pin Dupont connector for convenient integration.
Key Features
- Temperature range: -55°C to +125°C
- Accuracy: ±0.5°C (-10°C to +85°C)
- 1-Wire digital interface — multiple sensors on a single data line
- Programmable resolution: 9-bit to 12-bit
- Operating voltage: 3.0V–5.5V
- Low power consumption for battery-powered IoT devices
- Available in TO-92 package and waterproof stainless steel probe
- No external ADC required — direct digital output
| Parameter | Specification |
|---|---|
| Temperature Range | -55°C to +125°C |
| Accuracy | ±0.5°C (-10°C to +85°C) |
| Output Type | Digital 1-Wire (addressable) |
| Operating Voltage | 3.0V – 5.5V |
| Resolution | 9-bit to 12-bit (programmable) |
| Conversion Time | ~750ms (12-bit) / ~94ms (9-bit) |
| Housing / Probe | Stainless steel waterproof probe / Epoxy-sealed TO-92 package |
| Cable Length | 1m standard / Custom available |
| Pull-up Resistor | 4.7kΩ recommended (DATA to VCC) |
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Frequently Asked Questions
Yes — use the stainless steel waterproof probe variant with food-grade cable and follow HACCP cleaning and IP rating requirements for your application.
Yes. The 1-Wire protocol supports multiple DS18B20 sensors on a single DATA line, each identified by a unique 64-bit address. Ideal for multi-point monitoring with minimal wiring.
Yes — the waterproof probe variant is designed for reefer monitoring, refrigerated transport, and cold chain datalogging. Route sensor cables away from compressors and use shielded cable for long runs.