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LoRaWAN Pulse Counter – Water Meter Monitoring, IP67: EM300-DI | Milesight

Milesight EM300-DI LoRaWAN pulse counter for remote water meter monitoring. IP67 enclosure, dry-contact input, water consumption calculation, temperature and humidity sensing, and up to 5 years of battery life.

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The Milesight EM300-DI is a compact LoRaWAN pulse counter designed to convert conventional pulse-output water meters into wireless monitoring devices. It supports remote pulse counting, water consumption monitoring and digital input detection for agricultural, commercial and industrial applications.

Equipped with an IP67 waterproof enclosure, an internal temperature and humidity sensor, and a replaceable battery providing up to 5 years of operation, the EM300-DI is suitable for indoor and outdoor installations. Its LoRaWAN connectivity enables remote data transmission to compatible gateways and monitoring platforms.

What is the EM300-DI used for?

The EM300-DI collects pulse signals from compatible water meters or other passive pulse-output devices and converts them into digital monitoring data. It can calculate water consumption based on configurable pulse values and generate water flow or outage alarms.

Its digital input functionality also allows the device to monitor dry-contact signals. Collected data can be transmitted over LoRaWAN for centralized monitoring and analysis through compatible IoT platforms.

Advantages

Wireless meter monitoring: converts conventional pulse-output meters into LoRaWAN-connected monitoring devices.
Flexible pulse counting: configurable counting functions for enabling, stopping and clearing accumulated values.
Water consumption calculation: supports pulse-based water usage monitoring and water flow or outage alarms.
Digital signal filtering: filters interference signals to improve counting reliability.
Integrated environmental monitoring: built-in temperature and humidity sensors provide additional installation environment data.
Long-range communication: LoRaWAN wireless transmission up to 10 km under line-of-sight conditions.
Rugged construction: IP67 enclosure for indoor and outdoor installations.
Long battery life: replaceable 4000 mAh battery offering up to 5 years of operation under specified conditions, with an optional 8000 mAh version.
Local data storage: stores up to 1,000 records with data retransmission and retrieval functions.
Milesight D2D support: enables direct device communication without requiring a gateway for supported control applications.
Simple configuration: NFC configuration through a compatible mobile application.
LoRaWAN integration: compatible with standard LoRaWAN gateways, network servers and Milesight IoT platforms.

Technical specifications

Pulse Counting and Digital Input
Model	EM300-DI
Interface	1 × GPIO, dry contact
Operating modes	Pulse Counter / Digital Input
Maximum input frequency	2,000 Hz
Minimum pulse width	250 µs
Compatible meters	Reed switch meters and other passive pulse-output meters
Cable length	1 m (customizable)
Wire connection	3.5 mm
Temperature and Humidity Measurement
Temperature range	-30°C to +70°C
Temperature accuracy	±0.3°C (0°C to +70°C); ±0.6°C (-30°C to 0°C)
Temperature resolution	0.1°C
Humidity range	0–100% RH
Humidity accuracy	±3% RH (10–90% RH); ±5% RH outside this range
Humidity resolution	0.5% RH
Wireless Communication
Wireless technology	LoRaWAN, Milesight D2D
Frequency bands	CN470 / IN865 / RU864 / EU868 / US915 / AU915 / KR920 / AS923-1, 2, 3, 4
Transmission range	Up to 10 km (line of sight)
Transmission power	16 dBm (868 MHz); 20 dBm (915 MHz); 19 dBm (470 MHz)
Receiver sensitivity	-137 dBm @ 300 bps
LoRaWAN mode	OTAA / ABP, Class A
Antenna	Internal antenna
Power and Data Management
Power supply	1 × 4000 mAh ER18505 Li-SOCl2 replaceable battery
Battery option	8000 mAh version available
Battery life	Up to 5 years (10-minute interval, 25°C, laboratory conditions)
Configuration	NFC via mobile application, LoRaWAN downlink
Data storage	1,000 entries
Advanced features	Data retransmission, data retrieval, temperature threshold alarms, water flow/outage alarms, Milesight D2D Controller
Physical and Environmental Characteristics
Operating temperature	-30°C to +70°C
Operating relative humidity	≤95% RH (non-condensing)
Ingress protection	IP67
Housing material	Flame-retardant ABS + PC
Dimensions	105.6 × 85.2 × 27 mm
Weight	114.2 g (with battery and wire)
Installation	Wall screw mounting, 3M tape mounting, cable-tie mounting
Regulatory approvals	CE, FCC, ISED, RCM, Telec
Environmental compliance	RoHS

Typical applications

Agricultural irrigation: monitor water consumption from pulse-output irrigation meters and support remote water usage management.
Industrial water monitoring: collect pulse counts from compatible meters used to track water consumption in industrial facilities.
Commercial property metering: connect conventional pulse-output water meters to a wireless monitoring network.
Remote meter reading: transmit consumption data from distributed meters without requiring manual readings at each installation.
Water flow monitoring: use pulse counting and configurable alarms to identify water flow or outage conditions.

What should you check before choosing the EM300-DI?

Before selecting the EM300-DI, verify that the connected meter provides a compatible passive pulse or reed-switch output. The device supports a single dry-contact GPIO interface with a maximum input frequency of 2,000 Hz and a minimum pulse width of 250 µs.

For water consumption calculations, the pulse-to-volume conversion must be configured according to the connected meter. Installation planning should also consider the supplied 1 m cable, available mounting options and LoRaWAN coverage.

For Canadian installations, select the appropriate US915 LoRaWAN configuration and confirm compatibility with the intended gateway and network server.

Frequently asked questions

Can the EM300-DI be connected to an existing water meter?

Yes. The EM300-DI supports reed-switch water meters and other compatible passive pulse-output meters. It enables pulse counting and wireless transmission of the collected data.

Does the EM300-DI measure water flow directly?

The device counts electrical pulses from a connected meter rather than measuring flow directly. Water consumption calculations depend on the pulse output and configuration of the external meter.

Does the EM300-DI measure temperature and humidity?

Yes. The device includes built-in temperature and humidity sensors for monitoring environmental conditions around the installation.

Can the EM300-DI operate without a LoRaWAN gateway?

The EM300-DI supports the Milesight D2D protocol for direct communication with compatible devices without a gateway. Standard remote LoRaWAN monitoring requires compatible network infrastructure.

How long does the battery last?

The replaceable 4000 mAh battery provides up to 5 years of operation under the manufacturer's specified laboratory conditions. Actual battery life depends on configuration and operating conditions.

Why choose the Milesight EM300-DI?

The Milesight EM300-DI LoRaWAN Pulse Counter provides a practical solution for connecting existing pulse-output water meters to wireless monitoring systems without replacing the meters themselves.

Its configurable pulse counting, IP67 enclosure, long battery life and local data storage make it suitable for distributed metering applications in agriculture, commercial buildings and industrial facilities.

Technical support from ES Canada

ES Canada supports Canadian customers in selecting Milesight LoRaWAN monitoring solutions according to their meter compatibility, network architecture, installation conditions and water monitoring requirements.