---
lang: "en"
title: "LoRaWAN Liquid Level Sensor EM300-CL"
sku: "EM300-CL-868M"
canonical_url: "https://shop.marcomweb.it/en/lorawan/lorawan-liquid-level-sensor-em300-cl"
brand: "MARCOM S.r.l."
end_of_life: "false"
---

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EM300-CL: a non-contact liquid level sensor based on LoRaWAN®, which relies on the principle of capacitive sensing.

EM300-CL is a non-contact liquid level sensor based on LoRaWAN®, using the principle of capacitive sensing. It is primarily used to monitor handwashing levels in restrooms and to send alerts when handwash is insufficient. The alarm triggers when the handwash level approaches the electrode sensing plate, signaling insufficiency. It can be perfectly integrated with containers of various shapes and sizes to provide alerts and ensure handwash is replenished in time, promoting the smooth operation of hygiene and cleaning management systems. Furthermore, thanks to LoRaWAN® technology supporting low power consumption, the integrated high-capacity battery can last for several years without replacement. Additionally, EM300-CL is compatible with both the Milesight gateway and Milesight IoTCloud for remote monitoring and intelligent data management, enabling water conservation.

## Technical Specifications

#### 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
- **Mode:** OTAA/ABP Class A

#### Detector

- **Principle:** Capacitive Level Sensor
- **Cable Length:** 1 m

#### Operation

- **Power On/Off:** NFC, Power Button (internal)
- **Configuration:** NFC via Mobile App

#### Physical Characteristics

- **Power Supply:** 1 ER18505 Li-SOCL2 4000 mAh battery (extendable to 2 batteries)
- **Battery Life:** >10 years (3 alarms per day, 25℃)
- **Operating Temperature:** -20°C to +60°C
- **Relative Humidity:** 0% to 95% (non-condensing)
- **Material and Color:** 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 inches), Electrode Sensing Sheet: 56.8 x 25.5 x 0.2 mm (2.24 × 1 × 0.0079 inches)
- **Weight:** 110 g (with 1 battery)
- **Installation:** Transceiver: Wall mounting with screws, 3M tape mounting, Electrode Pad: Zip tie mounting, 3M tape mounting

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Source: https://shop.marcomweb.it/en/lorawan/lorawan-liquid-level-sensor-em300-cl

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