SONOFF SNZB-02P Zigbee Indoor Temperature & Humidity Sensor 2-Pack — Precise Swiss Sensor, 5s Updates, 4-Year Battery

The SONOFF SNZB-02P is a compact Zigbee 3.0 indoor thermometer and hygrometer that delivers fast, accurate temperature and humidity readings with alerts and cloud logging for remote monitoring.

Small and battery-powered, this two-pack of SONOFF SNZB-02P sensors pairs with Zigbee 3.0 hubs to keep continuous track of indoor climate. Each sensor uses a Swiss-made hygrometer element for precise measurements, updates every five seconds for near real-time insight, and can push comfort alerts to your phone. With up to four years of battery life and cloud data storage, the SNZB-02P helps you spot trends, export records, and link readings into automated smart-home routines through compatible hubs like SONOFF iHost, NSPanel Pro, or other Zigbee 3.0 controllers.

How quickly and accurately does this sensor report temperature and humidity?

The SNZB-02P uses a Swiss-made sensing module that yields high precision: temperature accuracy is around ±0.2°C (±0.4°F) and humidity accuracy is about ±2% RH. Measurements refresh every five seconds so you get near real-time changes in the app or automation triggers.

• Temperature accuracy: approximately ±0.2°C / ±0.4°F
• Humidity accuracy: approximately ±2% RH
• Data refresh interval: every 5 seconds
• Quick alerts when values move outside your set comfort range

Which smart hubs and voice systems work with the SNZB-02P?

This sensor is built to the Zigbee 3.0 standard, so it integrates with hubs and bridges that support that protocol. SONOFF lists native compatibility with its iHost, NSPanel Pro, ZB Bridge Pro and ZBDongle-E, and it can also pair with other Zigbee 3.0 controllers such as Echo (4th Gen) and SmartThings Hub V3 in many cases.

• Designed for Zigbee 3.0 compliant hubs and bridges
• Works with SONOFF iHost, NSPanel Pro, ZB Bridge Pro, ZBDongle-E
• Often compatible with Echo 4th Gen and SmartThings V3 hubs
• Enables voice queries and automation when connected to a supporting hub

What features help you monitor and review historical climate data?

SONOFF provides up to six months of free cloud storage so you can review trends by day, month, or a six-month range and export data for record-keeping. The sensor logs readings regularly, and the app allows real-time queries and CSV export for deeper analysis or sharing with others.

• Free cloud storage available for up to six months
• View daily, monthly, or six-month trend charts in the app
• Export data for spreadsheets or reports
• Use logged data to refine automations or HVAC settings

How long does the battery last and what are the alert capabilities?

Each SNZB-02P runs on a CR2477 battery and SONOFF lab tests indicate up to four years of life under typical conditions, though real-world usage may vary. You can set comfort thresholds for temperature and humidity; the sensor sends push notifications when readings cross those limits so you can respond quickly.

• Battery type: CR2477 coin cell
• Estimated battery life: up to 4 years (lab-based figure)
• Custom comfort alert thresholds and phone push notifications
• Low-battery reminders and easy battery replacement

Who this is for: The SONOFF SNZB-02P 2-pack suits homeowners, renters, and small-business owners who want precise indoor climate monitoring, automated routines tied to temperature or humidity, and accessible historical records. It benefits users already invested in Zigbee smart-home ecosystems or those seeking accurate, low-maintenance sensors for rooms like bedrooms, nurseries, wine cellars, greenhouses, or server closets where stable conditions matter.