Milesight EM300-DI Pulse Counter

The Milesight EM300-DI is a compact LoRaWAN pulse counter which transforms traditional water meters into wireless intelligent meters. With an IP67 waterproof design, it is suitable for use in various harsh application environments. In addition to LoRaWAN technology with it's low power consumption, the EM300-DI has a built-in high-capacity battery suitable for several years of use without replacement.

Moreover, the EM300-DI, when used with LoRaWAN gateways and IoT Cloud solutions for remote monitoring and data management, provides the tools required to achieve water saving. It is suitable for both indoor and outdoor applications such as on agricultural irrigation, industrial water use, property meter reading and numerous other scenarios.


  • Flexible counting configuration to enable, stop, clear accumulated values
  • Supports digital filtering of interference to ensure more accurate counting
  • Embedded with temperature and humidity sensors for environment monitoring
  • IP67 waterproof enclosure for harsh environment applications
  • Ultra-wide-distance transmission up to line of sight of 10km
  • Store more than 2200 historical records and support retransmission to prevent data loss
  • A built-in 4000 mAh replaceable battery for 5 years of operation without replacement
  • Equipped with NFC for easily configuration
  • Compliant with standard LoRaWAN gateways and network servers


Physical Characteristics
DimensionsTransceiver: 105.6 mm (h) x 85.3 mm (w) x 27 mm (d)
1m fly lead cable for connection to pulse source
InstallationWall Mounting
Environmental Characteristics
Operating Temperature-30C to +70C
Relative Humidity0% to 95% (non-condensing)
Ingress ProtectionIP67
Battery4000 mAh ER18505 Li-SOCL2 Battery (extendable to 2 batteries)
Battery LifeUpto 10 years (2 Batteries, at a 10 minute read interval and with 48 triggers/day)
Power On/OffNFC with APP, or Internal Power Button
Sensor Characteristics
GPIOPort: 1 Dry Contact
Work Mode: Pulse Counter, Digital Input
Cable Length: 1 m (Customizable)
Applicable Input Devices: Reed switches, meters, or any other passive pulse meter
TemperatureRange: -30C to + 70C
Accuracy: 0C to + 70C (+/- 0.3C), -30C to 0C (+/- 0.6C)
Resolution: 0.1C
HumidityRange: 0% to 100% RH
Accuracy: 10% to 90% RH (+/- 3%), below 10% and above 90% RH (+/- 5%)
Resolution: 0.5% RH
Wireless Characteristics
Tx Power16dBm(868)/20dBm(915)/19dBm(470)
Sensitivity-137dBm @300bps
ModeOTAA/ABP Class A
Configuration Interface
NFCPower On/Off, configure with Mobile App
RegulatoryCE, FCC, RoHS, LoRaWAN Certified
Ordering Information and Pricing
Part Number Model Number Description RRP
[A] Milesight EM300-MCS Magnetic Switch Sensor
EM300-DI-915M EM300-DI LoRaWAN 1 Channel Pulse Counter, Temperature and Humidity Sensor, 2200 Data Point Storage, Temp & HumidityIP67 $121.00 C3