LoRaWAN EM300-CL liquid level sensor

EM300-CL is a non-contact liquid level sensor based on LoRaWAN®, using the capacitive sensing principle. It is mainly used to monitor handwashing in washrooms and to send alarms when handwashing is insufficient. The alarm is triggered when the handwashing level approaches the electrode detection plate, signalling insufficient handwashing. It can be seamlessly integrated with containers of different shapes and sizes to alert and ensure that handwashing is replenished on time, promoting the smooth operation of the hygiene and cleaning management system. In addition, thanks to LoRaWAN® technology supporting low power consumption, the integrated high-capacity battery can last several years without replacement. Furthermore, the EM300-CL is compatible with both the Milesight gateway and Milesight IoTCloud to achieve remote monitoring and intelligent data management, enabling water conservation.

Technical features

Wireless transmission

• Technology: LoRaWAN
• Frequency: CN470/IN865/RU864/EU868/US915/AU915/KR920/AS923-1&2&3&4
• Tx Power: 16dBm (868 MHz)/20dBm (915 MHz)/19dBm (470 MHz)
• Sensitivity: -137dBm @300bps
• Modes: OTAA/ABP Class A

Detector

• Principle: Capacitive level sensor
• Cable length: 1 m

Operation

• Power on/off: NFC, power button (internal)
• Configuration Configuration: NFC via mobile app

Physical characteristics

• Power supply: 1 x ER18505 Li-SOCL2 4000 mAh battery (extendable to 2 batteries)
• Battery life: >10 years (triggering 3 alarms per day, 25℃)
• Operating temperature: -20℃ to +60℃
• Relative humidity: 0% to 95% (non-condensing)
• Material and colour: Transceiver: ABS + PC, white, Electrode pad: Black
• Ingress protection: Transceiver: IP67, Electrode pad: IP30
• Dimensions: Transceiver: 105.6 × 85.2 × 27 mm (4.15 × 3.35 × 1.06 in.), Electrode bearing sheet: 56.8 × 25.5 × 0.2 mm (2.24 × 1 × 0.0079 in.)
• Weight: 110 g (with 1 battery)
• Installation: Transceiver: Wall mounting with screws, mounting with 3M adhesive tape, Electrode pad: Mounting with cable ties, mounting with 3M adhesive tape