{"product_id":"sonoff-airguard-th-snzb-02dr2","title":"Sonoff AirGuard TH SNZB-02DR2 - Zigbee Temperature and Humidity Sensor with LCD","description":"\u003ch2\u003eTemperature and Humidity at a Glance\u003c\/h2\u003e\n\u003cp\u003eHumid bathrooms, stuffy bedrooms, a wine cellar that's a bit too warm... you only notice when it's too late. The Sonoff AirGuard TH (SNZB-02DR2) measures temperature and humidity with laboratory accuracy and displays the values clearly on a large 3.6-inch LCD screen. No phone needed for a quick check.\u003c\/p\u003e\n\u003ch2\u003ePower and Connectivity\u003c\/h2\u003e\n\u003cp\u003eThe sensor communicates via Zigbee 3.0 (IEEE 802.15.4) and runs on 2 AAA batteries. A Zigbee coordinator is required for smart home integration; the sensor functions as an EndDevice in the Zigbee network. In addition to Zigbee, the sensor features a Bluetooth Proximity mode for direct pairing with the eWeLink app on your smartphone, without a hub.\u003c\/p\u003e\n\u003ch2\u003eFunctionality and Settings\u003c\/h2\u003e\n\u003cp\u003eThe 3.6-inch LCD display shows current temperature, humidity, 24-hour minimum and maximum values, and a comfort index. Measurement accuracy is ±0.2 °C over a range of -20 °C to 60 °C and ±2% RH over 0 to 100% RH, based on the Sensirion SHT40 sensor. The display switches between °C and °F. Via Zigbee2MQTT, comfort limits for temperature and humidity can be set; the display shows an icon if these limits are exceeded. Temperature and humidity calibration is adjustable via an offset.\u003c\/p\u003e\n\u003ch2\u003ePairing with other sensors\u003c\/h2\u003e\n\u003cp\u003eIn Zigbee mode, the AirGuard TH can display live readings from another \u003ca title=\"Sonoff Zigbee temperature sensors\" href=\"\/en\/collections\/slimme-temperatuursensoren\"\u003eSonoff Zigbee sensor\u003c\/a\u003e (SNZB-02, SNZB-02P, SNZB-02WD, SNZB-02D or SNZB-02LD) on its display. This allows you to see indoor and outdoor temperatures at a glance, without opening the app.\u003c\/p\u003e\n\u003ch2\u003eData History and Analysis\u003c\/h2\u003e\n\u003cp\u003eThe eWeLink app stores measurement history for approximately 6 months and displays graphs and long-term statistics. Additionally, the app calculates dew point and VPD (Vapour Pressure Deficit), useful for plant growers and terrariums. Threshold notifications can be set per sensor.\u003c\/p\u003e\n\u003ch2\u003eHome Assistant\u003c\/h2\u003e\n\u003cp\u003eThe SNZB-02DR2 is fully supported in Home Assistant via Zigbee2MQTT and ZHA. Pairing procedure via Zigbee2MQTT:\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003ePut the coordinator in pairing mode in Zigbee2MQTT.\u003c\/li\u003e\n\n\u003cli\u003ePress the reset button on the back of the sensor until the display responds.\u003c\/li\u003e\n\n\u003cli\u003eThe sensor will automatically appear as \u003ccode\u003eSONOFF SNZB-02DR2\u003c\/code\u003e in Zigbee2MQTT.\u003c\/li\u003e\n\n\u003cli\u003eAfter pairing, the entities \u003ccode\u003esensor.temperature\u003c\/code\u003e, \u003ccode\u003esensor.humidity\u003c\/code\u003e, \u003ccode\u003esensor.battery\u003c\/code\u003e, and \u003ccode\u003esensor.voltage\u003c\/code\u003e will be available.\u003c\/li\u003e\n\n\u003cli\u003eComfort limits can be set via Zigbee2MQTT after waking up the sensor with the button on the back.\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp\u003eOperation is entirely local, no cloud required. OTA firmware updates are supported via Zigbee2MQTT. No \u003ca title=\"Zigbee USB controllers\" href=\"\/en\/collections\/smart-home-usb-controller?sort_by=best-selling\u0026amp;filter.p.m.custom.protocol=Zigbee\"\u003eZigbee coordinator\u003c\/a\u003e at home? You can find one at slimhuisje.nl.\u003c\/p\u003e\n\u003ch2\u003eHomey\u003c\/h2\u003e\n\u003cp\u003eAt the time of writing, the SNZB-02DR2 is not yet officially supported in the Sonoff Zigbee app for \u003ca title=\"Homey\" href=\"\/en\/collections\/homey\"\u003eHomey\u003c\/a\u003e. Check the \u003ca rel=\"noopener noreferrer\" title=\"Sonoff Zigbee app Homey\" href=\"https:\/\/homey.app\/nl-nl\/app\/com.sonoff.zigbee\/\" target=\"_blank\"\u003eHomey App Store\u003c\/a\u003e for the current status. Pairing as a generic Zigbee device is possible via the Zigbee controller on Homey Pro, but with limited entities.\u003c\/p\u003e\n\u003ch2\u003eOther platforms\u003c\/h2\u003e\n\u003cp\u003eCompatible with Amazon Alexa, Google Home and Apple Home (via Matter-bridge) via the eWeLink app or a compatible Zigbee hub. The eWeLink app provides direct access via Bluetooth Proximity without a hub.\u003c\/p\u003e\n\u003ch2\u003eAutomation examples\u003c\/h2\u003e\n\u003ch3\u003eVentilation schedule based on humidity\u003c\/h3\u003e\n\u003cul\u003e\n\n\u003cli\u003eTrigger: \u003ccode\u003esensor.bathroom_humidity\u003c\/code\u003e rises above 70% RH.\u003c\/li\u003e\n\n\u003cli\u003eCondition: time window 06:00–23:00.\u003c\/li\u003e\n\n\u003cli\u003eAction: turn on \u003ca title=\"Smart plugs\" href=\"\/en\/collections\/slimme-stekker\"\u003esmart plug\u003c\/a\u003e with bathroom fan.\u003c\/li\u003e\n\n\u003cli\u003eSecond trigger: humidity drops below 60% RH, turn off fan.\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003ch3\u003eNight frost notification for conservatory or outdoor area\u003c\/h3\u003e\n\u003cul\u003e\n\n\u003cli\u003eTrigger: \u003ccode\u003esensor.conservatory_temperature\u003c\/code\u003e drops below 4 °C.\u003c\/li\u003e\n\n\u003cli\u003eCondition: time after 20:00.\u003c\/li\u003e\n\n\u003cli\u003eAction: push notification to phone: \"Conservatory temperature below 4 °C — risk of night frost.\"\u003c\/li\u003e\n\n\u003cli\u003eOptional: turn on \u003ca title=\"Smart plugs\" href=\"\/en\/collections\/slimme-stekker\"\u003esmart plug\u003c\/a\u003e with hot air fan.\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003ch2\u003ePoints of Attention\u003c\/h2\u003e\n\u003cul\u003e\n\n\u003cli\u003eRequires a \u003ca title=\"Zigbee USB controllers\" href=\"\/en\/collections\/smart-home-usb-controller?sort_by=best-selling\u0026amp;filter.p.m.custom.protocol=Zigbee\"\u003eZigbee coordinator\u003c\/a\u003e for smart home integration; not included.\u003c\/li\u003e\n\n\u003cli\u003eFunctions as an EndDevice; does not extend the Zigbee network as a router.\u003c\/li\u003e\n\n\u003cli\u003eHomey support via the official Sonoff app has not yet been confirmed; check the app store for the current status.\u003c\/li\u003e\n\n\u003cli\u003eSetting comfort limits via Zigbee2MQTT requires the sensor to be active (press the button).\u003c\/li\u003e\n\n\u003cli\u003eNot moisture resistant; not suitable for outdoor use or direct moisture exposure.\u003c\/li\u003e\n\n\u003cli\u003e2× AAA batteries are included.\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003ch2\u003eContents of the box\u003c\/h2\u003e\n\u003cul\u003e\n\n\u003cli\u003eSonoff AirGuard TH SNZB-02DR2\u003c\/li\u003e\n\n\u003cli\u003e2× AAA batteries\u003c\/li\u003e\n\n\u003cli\u003eMounting materials\u003c\/li\u003e\n\n\u003cli\u003eQuick start guide\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eWorks with: Home Assistant (Zigbee2MQTT \/ ZHA) · eWeLink app (Zigbee + Bluetooth Proximity) · Amazon Alexa · Google Home · Apple Home (via Matter-bridge) · \u003ca title=\"Sonoff\" href=\"\/en\/collections\/sonoff\"\u003eSonoff\u003c\/a\u003e Zigbee Bridge Pro · SONOFF NSPanel Pro · SONOFF ZBDongle-P\/E.\u003c\/p\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\n\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eModel\u003c\/td\u003e\n\n\u003ctd\u003eSNZB-02DR2\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eEAN\u003c\/td\u003e\n\n\u003ctd\u003e6920075743593\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eProtocol\u003c\/td\u003e\n\n\u003ctd\u003eZigbee 3.0 (IEEE 802.15.4) + Bluetooth Proximity\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eZigbee chipset\u003c\/td\u003e\n\n\u003ctd\u003eTLSR8656F512ET32\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eZigbee role\u003c\/td\u003e\n\n\u003ctd\u003eEndDevice\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eSensor\u003c\/td\u003e\n\n\u003ctd\u003eSensirion SHT40\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eDisplay\u003c\/td\u003e\n\n\u003ctd\u003e3.6 inch LCD\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eTemperature range\u003c\/td\u003e\n\n\u003ctd\u003e-20 °C to 60 °C\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eTemperature accuracy\u003c\/td\u003e\n\n\u003ctd\u003e±0.2 °C\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eHumidity range\u003c\/td\u003e\n\n\u003ctd\u003e0–100% RH\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eHumidity accuracy\u003c\/td\u003e\n\n\u003ctd\u003e±2% RH\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eResponse time\u003c\/td\u003e\n\n\u003ctd\u003e5 seconds (upon value change)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003ePower supply\u003c\/td\u003e\n\n\u003ctd\u003e2× AAA 1.5V (included)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\n\u003ctd\u003e95 × 70 × 18.2 mm\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eWeight\u003c\/td\u003e\n\n\u003ctd\u003e99.3 g (with batteries)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eCertification\u003c\/td\u003e\n\n\u003ctd\u003eCE \/ FCC \/ RoHS\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\n\u003ctd\u003e2 years\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\n\n\n\u003c\/table\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eHow do I pair the Sonoff AirGuard TH with Home Assistant?\u003c\/h3\u003e\n\u003cp\u003ePut your \u003ca title=\"Zigbee USB controllers\" href=\"\/en\/collections\/smart-home-usb-controller?sort_by=best-selling\u0026amp;filter.p.m.custom.protocol=Zigbee\"\u003eZigbee coordinator\u003c\/a\u003e in pairing mode via Zigbee2MQTT or ZHA. Then press the reset button on the back of the sensor until the display responds. The sensor will automatically appear as \u003ccode\u003eSONOFF SNZB-02DR2\u003c\/code\u003e and after pairing, entities for temperature, humidity, battery, and voltage will be immediately available.\u003c\/p\u003e\n\u003ch3\u003eDo I need a hub or bridge?\u003c\/h3\u003e\n\u003cp\u003eFor Zigbee integration with Home Assistant or the eWeLink app via Zigbee, you need a \u003ca title=\"Zigbee USB controllers\" href=\"\/en\/collections\/smart-home-usb-controller?sort_by=best-selling\u0026amp;filter.p.m.custom.protocol=Zigbee\"\u003eZigbee coordinator\u003c\/a\u003e. Via Bluetooth Proximity mode, you communicate directly with the eWeLink app on your smartphone, without a hub.\u003c\/p\u003e\n\u003ch3\u003eDoes the sensor also work outdoors?\u003c\/h3\u003e\n\u003cp\u003eThe sensor is not moisture-resistant (no IP rating) and not suitable for direct exposure to rain or condensation. However, its measurement range extends down to -20 °C, so use in a covered outdoor area or conservatory is possible, provided it stays dry.\u003c\/p\u003e\n\u003ch3\u003eCan I combine two sensors on one display?\u003c\/h3\u003e\n\u003cp\u003eYes. In Zigbee mode, you can pair a second \u003ca title=\"Sonoff Zigbee temperature sensors\" href=\"\/en\/collections\/slimme-temperatuursensoren\"\u003eSonoff Zigbee sensor\u003c\/a\u003e (such as the SNZB-02P) to the AirGuard TH. The display will then show the values of both sensors live, which is convenient for monitoring indoor and outdoor temperatures at a glance.\u003c\/p\u003e\n\u003ch3\u003eDoes the sensor work with Homey?\u003c\/h3\u003e\n\u003cp\u003eAt the time of writing, the SNZB-02DR2 is not yet officially supported in the Sonoff Zigbee app for \u003ca title=\"Homey\" href=\"\/en\/collections\/homey\"\u003eHomey\u003c\/a\u003e. Please check the \u003ca rel=\"noopener noreferrer\" title=\"Sonoff Zigbee app Homey\" href=\"https:\/\/homey.app\/nl-nl\/app\/com.sonoff.zigbee\/\" target=\"_blank\"\u003eHomey App Store\u003c\/a\u003e for the current status. Pairing via Homey Pro as a generic Zigbee device is possible.\u003c\/p\u003e\n\u003ch3\u003eHow long do the batteries last?\u003c\/h3\u003e\n\u003cp\u003eSonoff does not specify an exact battery life for the SNZB-02DR2. In practice, battery life depends on the reporting interval and ambient temperature. With comparable Sonoff Zigbee sensors without a display, you typically get 1 to 2 years on 2 AAA batteries; the display consumes extra power, so expect a shorter lifespan.\u003c\/p\u003e\n\u003cp\u003e✅ slimhuisje.nl delivers the Sonoff AirGuard TH directly from stock. Connect it to your existing Zigbee network in minutes and keep a close eye on every room.\u003c\/p\u003e","brand":"Sonoff","offers":[{"title":"Default Title","offer_id":54179480764758,"sku":"SNZB-02DR2","price":19.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/5921\/3398\/files\/sonoff-airguard-th-3-6-lcd-zigbee-temperature-and-humidity-sensor-snzb-02dr2-6920075743593-5-1765636154495.jpg?v=1781291032","url":"https:\/\/slimhuisje.nl\/en\/products\/sonoff-airguard-th-snzb-02dr2","provider":"slimhuisje.nl","version":"1.0","type":"link"}