DS18B20 / 18B20 1-Wire Digital Temperature Sensor — TO-92 & Waterproof Probe Options

The DS18B20 (often called 18B20) is a dependable 1-Wire digital temperature sensor available in TO-92 and waterproof probe packages. It delivers accurate temperature readings, supports 9–12 bit resolution, and allows many sensors to share a single data line — ideal for distributed temperature monitoring, IoT projects and environmental logging.

• Interface: 1-Wire (single data line + ground + Vcc)
• Supply: 3.0–5.5 V (parasite-power mode supported)
• Resolution: 9–12 bit (configurable)
• Accuracy: ±0.5°C (−10°C to +85°C typical)
• Form factors: TO-92, waterproof stainless-steel probe, and SMD
• Use cases: greenhouse & aquarium monitoring, HVAC probes, multi-sensor arrays, and IoT temperature networks

Notes: For immersion or outdoor use choose the waterproof probe variant and ensure proper cable/connector sealing. Multiple DS18B20 sensors can be connected on one bus — each has a unique 64-bit ROM for addressing.