frient Motion Sensor 2 Pet – PIR motion, illuminance and temperature sensor, Zigbee (MOSZB-153)

The frient Motion Sensor 2 Pet (MOSZB-153) is a Zigbee 3.0 battery-powered PIR motion, illuminance and temperature sensor with built-in pet immunity.

The device uses a passive infrared (PIR) sensor to detect movement. It employs two separate detection thresholds: one for general occupancy detection and another for alarm events. The nominal motion detection range is up to 9 metres, with a detection angle of 45° both vertically and horizontally.

When installed correctly, the pet immunity function ignores animals weighing less than 25 kg moving below a height of 1 metre from the floor. Targets weighing more than 50 kg are treated as motion events. The manufacturer specifies a minimum detection distance of 6 metres when using the pet immunity function.

The integrated illuminance and temperature sensors provide data for lighting, heating and security automations. The device is powered by two replaceable AA batteries, with an expected battery life of approximately three years when reporting every two minutes.

About frient

frient is a Denmark-based manufacturer of Zigbee smart home devices. Its product range includes door and window sensors, motion detectors, temperature and humidity sensors, air quality sensors, water leak detectors, vibration sensors, smoke and heat alarms, smart plugs, energy meters and other smart home accessories.

frient devices use the Zigbee 3.0 standard and are compatible with a wide range of Zigbee gateways and coordinators. They are supported by Home Assistant, Zigbee2MQTT, ZHA, SmartThings, Homey and many other Zigbee-based smart home platforms. Available features may vary depending on the selected gateway and integration.

Key Features

• PIR motion detection: Detects moving objects with a temperature different from the surrounding environment.
• Pet immunity: Ignores pets weighing up to 25 kg moving below 1 metre when installed correctly.
• Dual detection thresholds: Separate thresholds for occupancy detection and alarm events.
• Illuminance sensor: Measures ambient light (lux) for lighting automations.
• Temperature sensor: Measures ambient temperature from 0°C to +50°C.
• Tamper protection: Includes tamper detection that can be reported as a separate alarm event in compatible Zigbee systems.
• Configurable occupancy timeout: Motion reset delay can be configured between 2 and 65,000 seconds.
• Flexible installation: Can be mounted on flat walls, corners or stands using screws, adhesive tape or a magnetic mount.
• Battery powered: Operates from two replaceable AA batteries.

Smart Home Protocols and Platform Compatibility

• Zigbee 3.0: Uses IEEE 802.15.4 low-power wireless communication. Requires a compatible Zigbee gateway or coordinator.
• Zigbee end device: Operates as a battery-powered Zigbee end device and reports sensor, diagnostic and battery information.
• Home Assistant: Supported under the Works with Home Assistant program and compatible with Zigbee coordinators.
• Zigbee2MQTT: Supports motion, temperature, illuminance, battery level, battery voltage, status LED configuration and occupancy timeout.
• MQTT integration: Sensor data is published through Zigbee2MQTT via MQTT.
• ZHA: Compatible with Home Assistant Zigbee Home Automation.
• Samsung SmartThings: Works with SmartThings when using the appropriate Edge Driver.
• Homey: Motion, illuminance and temperature data are available for Homey automations.
• Local operation: Home Assistant, Zigbee2MQTT and ZHA process sensor data locally without requiring an internet connection.

Smart Features

• Motion status: Reports occupancy and motion detection status.
• Motion-based automation: Can trigger lights, sirens, cameras and other compatible devices.
• Occupancy timeout: Automations can be triggered when the configured occupancy period expires.
• Adjustable occupancy timeout: Configurable from 5 to 65,535 seconds in Zigbee2MQTT.
• Illuminance monitoring: Reports ambient light level in lux.
• Light-based automation: Lighting can be activated only when ambient light falls below a specified threshold.
• Temperature monitoring: Displays and logs measured temperature.
• Temperature-based automation: Temperature values can trigger heating, cooling or notifications.
• Temperature calibration: Software temperature offset available in Zigbee2MQTT.
• Illuminance calibration: Percentage correction available for lux readings.
• Status LED configuration: LED behaviour can be configured for motion events, fault indication or both.
• Battery level: Remaining battery capacity is displayed as a percentage.
• Battery voltage: Battery voltage is available in millivolts in Zigbee2MQTT.
• Low battery warning: Reports low battery status.
• OTA firmware updates: Supports wireless firmware updates via Zigbee2MQTT.

Technical Specifications

• Product name: Motion Sensor 2 Pet
• Model: MOSZB-153
• Product type: Zigbee PIR motion, illuminance and temperature sensor with pet immunity
• Detection technology: Passive infrared (PIR)
• Detection range: Up to 9 m
• Detection range with pet immunity: Minimum 6 m
• Detection angle: 45° vertically and 45° horizontally
• Occupancy timeout: Configurable from 2 to 65,000 seconds
• Detection thresholds: Separate occupancy and alarm thresholds
• Pet immunity: Ignores animals under 25 kg moving below 1 metre
• Human detection threshold: Targets above 50 kg
• Illuminance sensor: Dark, bright and strong light detection levels
• Temperature range: 0°C to +50°C
• Temperature resolution: 0.1°C
• Typical temperature accuracy: ±0.5°C
• Maximum temperature deviation: ±2°C
• Wireless protocol: Zigbee 3.0
• Zigbee device type: End device
• Power supply: 2 × replaceable AA batteries
• Battery life: Approximately 3 years with 2-minute reporting interval
• Battery monitoring: Battery level and low battery reporting
• Receiver sensitivity: -100 dBm
• Transmit power: +10 dBm (EU version)
• Ingress protection: IP20
• Operating temperature: 0°C to +50°C
• Operating humidity: 5–85% RH, non-condensing
• Dimensions: 70 × 70 × 37 mm
• Colour: White
• Compliance: CE, FCC, IC and RED
• Certification: Zigbee 3.0

Additional Features

• Flat surface mounting: Can be installed on walls or ceilings using screws, double-sided adhesive tape or magnetic mounting.
• Corner mounting: Includes a corner bracket for installation in room corners.
• Desktop placement: Can also be positioned on shelves or other flat surfaces using the supplied stand.
• Detection coverage: Install with an unobstructed view of the monitored area.
• Pet immunity installation: Position the sensor so pets remain within the lower detection zone.
• Distance from heat sources: Install at least 4 metres away from fireplaces or stoves.
• Installation environment: Direct sunlight, HVAC airflow and rapid temperature changes may affect PIR performance.
• Obstructions: Curtains, furniture and other objects may reduce detection coverage.
• Pairing: After inserting the batteries, the device searches for a Zigbee network for up to 15 minutes.
• Factory reset: Press and hold the button beneath the cover until the long LED flash confirms reset.
• Integration differences: Illuminance data, dual detection thresholds, tamper reporting, LED settings and configurable occupancy timeout depend on the Zigbee gateway and integration used.

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