Shelly - Outdoor Zigbee or Bluetooth IP54 temperature and humidity sensor ivory Shelly BLU H&T ZB

Shelly BLU H&T ZB - Zigbee & Bluetooth Temperature and Humidity Sensor

The Shelly BLU H&T ZB is a compact, smart sensor for measuring temperature and humidity. With dual Zigbee and Bluetooth connectivity, it enables local automations, threshold-based alerts, and remote monitoring—without the need for cloud services. Designed with an IP54-rated enclosure, it’s suitable for most indoor environments, even where splash resistance is important.

Main Features

• Real-time temperature and humidity monitoring
• Threshold alerts to prevent mould or frozen pipes
• Bluetooth and Zigbee pairing via simple button sequences
• Supports automation triggers via platforms like Home Assistant and Zigbee2MQTT
• Encryption ensures secure local communication
• “Button press” event sends updated readings on demand

Specifications – Shelly BLU H&T ZB (Model SBHT-203C)

• Dimensions: 37 × 37 × 10 mm
• Weight: 13 g
• Color: Ivory
• Mounting: Flat surface
• Protection rating: IP54 (dust & splash resistant)
• Temperature range: -20°C to +60°C
• Humidity range: 0% to 100% RH
• Power supply: 1 × CR2032 battery (included)
• Battery life: Up to 3 years
• Connectivity: Zigbee 3.0 (802.15.4) and Bluetooth 5.0 LE
• Zigbee range: up to 10 m indoors / 30 m outdoors
• Bluetooth range: up to 10 m indoors / 30 m outdoors
• Microcontroller: EFR32MG27 with 768 kB flash
• Interface: 1 push button, 1 red LED
• Firmware features: Encryption (Yes), MQTT (No), Webhooks (No), Scripting (No)

Smart Home Use Cases

• Turn on a dehumidifier when humidity exceeds safe levels
• Trigger heating if the temperature drops too low
• Send alerts when temperature/humidity thresholds are breached
• Use with automations in Home Assistant, Zigbee2MQTT, or SmartThings

The Shelly BLU H&T ZB is ideal for smart climate control in homes, offices, or vacation properties—keeping your environment safe, efficient, and comfortable.