Ambient light sensor EM500-LGT

USBLoRaWANwireless

Overview
The EM500-LGT is an outdoor LoRaWAN® light intensity sensor designed for accurate monitoring of ambient illuminance in harsh environments. It features a wide measurement range, rapid response, robust ingress protection, long battery life and simple configuration via NFC, USB Type-C or downlink.

Key features

• Measurement range: 0–100,000 lux; accuracy ±3%; resolution 1 lux
• Fast response time (1 s) for reliable monitoring of light changes
• Rugged enclosure for outdoor use (transceiver IP67; light sensor IP65)
• LoRaWAN® wireless communication for long-range, low-power deployments
• Replaceable 19000 mAh Li-SOCL2 battery (ER34615) with up to 10 years life (10 min reporting interval, 25 °C)
• Internal antenna and multi-region frequency support
• Data integrity: onboard storage, retransmission and threshold alarm
• Easy configuration via NFC, USB Type-C (PC) or LoRaWAN® downlink

NFC configuration (quick flow)

• 1st Step: Install the Milesight ToolBox app
• 2nd Step: Enable NFC and run ToolBox, then attach your phone to the device
• 3rd Step: Verify the password and start configuring

Installation & Mounting

• Pole mounting
• Wall mounting
• DIN rail mounting

Typical applications
Suitable for brightness control, security systems, horticulture, floriculture and smart farming where monitoring ambient light is critical to crop health and automated lighting decisions.

Cloud & Integration
Operates on standard LoRaWAN® networks and is compatible with common LoRaWAN® gateways and network servers. Supports cloud data management features such as visualization dashboards, automatic triggers, real-time alerts and reporting when integrated with IoT cloud platforms.

Technical specifications

• Model: EM500-LGT
• Wireless Technology: LoRaWAN®
• Antenna: Internal antenna
• Frequency options: CN470 / IN865 / RU864 / EU868 / US915 / AU915 / KR920 / AS923
• Tx Power: 16 dBm (868) / 20 dBm (915) / 19 dBm (470)
• Sensitivity: -137 dBm @ 300 bps
• LoRaWAN Mode: OTAA / ABP Class A
• Measurement Range: 0 - 100000 lux
• Accuracy: ±3%
• Resolution: 1 lux
• LED: 1 × internal LED indicator
• Button: 1 × internal Power/Reset button
• USB: 1 × USB Type-C (internal) for configuration and console
• Power On/Off & Config: NFC and Power Button; configuration via Mobile App (NFC), PC (USB Type-C) or downlink
• Advanced Features: Data storage (1,000 entries), data retransmission, data retrievability, threshold alarm
• Cable Length (sensor to transceiver): 3 m
• Power Supply: 1 × 19000 mAh Li-SOCL2 battery (ER34615)
• Battery Life*: up to 10 years (10 min reporting interval, 25 °C)
• Operating Temperature: Transceiver: -30 °C to 70 °C; Light Sensor: -30 °C to 60 °C
• Relative Humidity: 0% to 100% (non-condensing)
• Ingress Protection: Transceiver: IP67; Light Sensor: IP65
• Housing & Color: Transceiver: ABS + PC, Grey; Light Sensor: Aluminum alloy, White
• Weight: Transceiver: 333 g (with battery and mounting bracket); Light Sensor: 280 g (with cable)
• Dimensions: Transceiver: 105.4 × 71 × 69.5 mm; Light Sensor: 64 × 58 × 34 mm
• Installation: Pole, Wall or DIN rail mounting
• Regulatory Approvals: CE, FCC, Telec, ICASA
• Environmental: RoHS compliant