Temperatūros ir drėgmės jutiklis SONOFF SNZB-02M AirGuard, ZigBee

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Prekė: Temperatūros ir drėgmės jutiklis SONOFF SNZB-02M AirGuard, ZigBee. Kategorija: Jutikliai.

• Gamintojas: Sonoff
• Modelis: SNZB-02M

⭐Multi-functional monitoring of the environment

SONOFF AirGuard TH Pressure SNZB-02M is a Zigbee 3.0 wireless sensor that monitors three basic environmental parameters:

• temperature,
• relative humidity,
• atmospheric pressure.

Based on the collected data, the device can also calculate the dew point and VPD, i.e. the water vapour pressure deficit. Thanks to this, SNZB-02M will work not only as a classic thermometer and hygrometer, but also as an advanced microclimate sensor.

⭐The most important advantages

• Temperature measurement to the nearest ±0,2°C.
• Humidity measurement with accuracy to ±2% RH.
• Atmospheric pressure measurement with an accuracy of ±0,1 hPa.
• Automatic calculation of dew point.
• Automatic VPD calculation.
• Zigbee 3.0 wireless communication.
• Reporting frequency even every 5 seconds.
• Powered by one CR2477 battery.
• Declared working time up to more than 2 years.
• Compact, round housing.
• Can be mounted with a magnetic base, adhesive tape or screws.
• Support for eWeLink, Home Assistant, Zigbee2MQTT and ZHA systems.

⭐Measurement of temperature and humidity

The sensor allows you to accurately monitor the conditions in the room. It can be used to control the comfort of household members, protect equipment and automate heating, ventilation and humidification.

Measurement parameters

• Temperature range: -20°C to 60°C.
• Temperature accuracy: ±0,2°C.
• Humidity range: 0 to 100% RH.
• Humidity accuracy: ±2% RH.
• Direct measurement without the need to connect wires.

The sensor should be used indoors, in non-condensing conditions.

⭐Measurement of atmospheric pressure

The built-in barometric sensor measures atmospheric pressure and transmits data to your home automation application or system.

Pressure information can be used to:

• observing weather changes,
• detection of sudden drops or increases in pressure,
• creating weather automation,
• monitoring conditions in the house, garage or greenhouse,
• analyzing the relationship between pressure and well-being.

It is worth remembering that SNZB-02M measures absolute pressure. The result may differ from the value given in the weather forecast, which often uses pressure converted to sea level.

⭐Point of dew

The dew point helps determine the temperature at which water vapor will begin to condense. Monitoring this parameter can help detect risks:

• condensation of water vapour,
• dampness of the walls,
• development of mold,
• fogging of windows,
• unfavorable conditions in the basement or garage.

⭐VPD

VPD, or Vapor Pressure Deficit, determines the level of moisture saturation of air. The parameter can be useful for:

• cultivation of plants,
• care of potted plants,
• control of conditions in the greenhouse,
• monitoring of the terrarium,
• analysis of the microclimate of rooms.

Dew point and VPD are values calculated on the basis of measured parameters, not separate measurements made by independent sensors.

⭐ ZigBee protocol

What distinguishes ZigBee from classic WiFi is a sufficiently long working time of battery-powered devices (unattainable with the classic WiFi protocol) and signal transmission through accessories powered by 230V.

In addition, selected ZigBee devices (230V mains powered) become part of the Mesh network. This means that if a module is unable to connect directly to the ZigBee gateway, it communicates with it through another closest accessory of this system. The repater in the ZigBee ecosystem are devices powered by 230V, such as PSMART, Aqara, OXT Zigbee relay, Sonoff ZigBee, TUYA, 230V sockets or bulbs.

Thanks to this, you can create an extensive network that can operate over much longer distances than classic WiFi.

⚙ Specification

• Manufacturer: SONOFF
• Model: SNZB-02M
• Product Name: AirGuard TH Pressure
• Device type: Temperature, humidity and pressure sensor
• Communication: Zigbee 3.0 / IEEE 802.15.4
• Power supply: 1 × CR2477 battery
• Temperature measurement: Yes
• Humidity measurement: Yes
• Atmospheric pressure measurement: Yes
• Calculation of dew point: Yes
• VPD calculation: Yes
• Temperature accuracy: ±0,2°C
• Humidity accuracy: ±2% RH
• Pressure accuracy: ±0,1 hPa
• Working temperature range: from -20°C to 60°C
• Humidity range: 0 – 100% RH
• Reporting frequency: from 5 seconds to 1 hour
• Declared working time: over 2 years
• Housing diameter: about 45 mm
• Housing height: approximately 17,6 mm
• Place of application: Indoors
• Assembly: Magnetic, adhesive tape or screws
• Compatible systems: eWeLink, Home Assistant, Zigbee2MQTT, ZHA

Specifications