Time-of-flight laser distance sensor EM400-TLD

NB-IoTLoRaWAN4G

Overview
EM400-TLD is a Time-of-Flight (ToF) laser distance sensor tailored for small and mini waste bins and short-range solid material measurement. It detects fill level, lid/open status (device position/tilt) and abnormal temperature/combustion events. Available in LoRaWAN®, NB‑IoT and Cat M variants, EM400-TLD is designed for long battery life, IP67 protection and easy on-site configuration via NFC.

Key features

• ToF distance measurement with 27° field of view for accurate short-range detection
• Detection range 2–350 cm with ±2 cm accuracy and 1 mm resolution
• Specialized for small-bin monitoring: fill level, lid/open status and combustion warning
• Two pre-set application modes (Standard and Bin) to simplify configuration and reporting
• Multiple wireless options: LoRaWAN®, NB‑IoT and Cat M
• Built-in 3-axis accelerometer for tilt/position status and internal NTC thermistor for temperature/combustion monitoring
• Ultra-long battery life with replaceable 2 × 9000 mAh ER26500 batteries
• IP67-rated enclosure and conformal coating on PCBA for outdoor/harsh environments
• NFC-based on-site configuration using the ToolBox mobile app and support for downlink configuration
• Supports cumulative reporting (NB/Cat M) to reduce transmission cost and power consumption

Versions / Deployment

• LoRaWAN® version — wide-area, low-power deployment suitable for private or public LoRaWAN networks
• NB‑IoT and Cat M versions — cellular transmission using existing base stations; NB/Cat M variants can provide GNSS positioning

Operational advantages

• Pre-set modes optimize reporting intervals to balance responsiveness and battery life
• Quick on-site commissioning via NFC and Milesight ToolBox (NFC enables power on/off and wireless template configuration)
• Conformal coating and IP67 housing extend lifetime in outdoor and harsh conditions
• Cloud-ready for visualization, automated triggers, scheduled reports and real-time alerts

Technical specifications

• Brand: Milesight
• Model: EM400-TLD
• Measurement technology: Time-of-Flight (ToF) laser
• Field of View (FoV): 27°
• Detection range: 2 — 350 cm
• Detection accuracy: ±2 cm (−20°C to 70°C)
• Detection resolution: 1 mm
• Device position: Normal / Tilt (3-axis accelerometer)
• Temperature sensing: −40 ~ 125°C; resolution 0.1°C (NTC thermistor)
• GNSS positioning: available on NB‑IoT / Cat M versions (longitude/latitude, resolution 0.000001)
• LED: 1 × internal indicator
• Button: 1 × internal Power/Reset
• Power supply: 2 × 9000 mAh ER26500 Li-SOCl2 batteries (replaceable)
• Battery life (typical): LoRaWAN — ≈10 years (example: Standard mode 10-min interval, 25°C); Bin mode ≈10 years (20-min interval, 25°C). NB‑IoT/Cat M — TCP/UDP ≈10 years; MQTT/AWS ≈5 years (scenario: 4 reports/day, up to 12 packets/report, 30-min collection, 25°C)
• Operating temperature: −30°C ~ 70°C
• Relative humidity: ≤95% (non-condensing)
• Ingress protection: IP67
• Dimensions: 118 × 65 × 30 mm
• Housing & color: ABS + PC (UL94 V0), black gray
• Weight: 208.3 g (with batteries)
• Installation: screw mounting on flat surfaces (bin-top center recommended for bin mode)
• Software & configuration: NFC (ToolBox mobile app), downlink configuration; features include cumulative reporting (NB), threshold alarms, tilt & distance switch
• Approvals: CE, FCC; Environmental: RoHS