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Soil Moisture, Temperature and Electrical Conductivity Sensor – LoRaWAN, IP68 Probe: EM500-SMTC | Milesight

Milesight EM500-SMTC LoRaWAN soil sensor measuring moisture, temperature and electrical conductivity. IP68 probe, up to 10 km transmission and long battery life for smart agriculture and irrigation monitoring.

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The Milesight EM500-SMTC is a LoRaWAN soil moisture, temperature and electrical conductivity sensor designed for continuous soil monitoring in agricultural, horticultural and outdoor environments. It combines three measurement parameters in a single probe, enabling remote monitoring of soil conditions for irrigation control, greenhouse management and precision agriculture.

Equipped with a corrosion-resistant IP68 soil probe and an IP67 LoRaWAN transceiver, the EM500-SMTC is designed for demanding outdoor installations. Its low-power wireless technology, replaceable 19000 mAh battery and compatibility with Milesight IoT platforms support long-term monitoring without frequent on-site intervention.

What is the EM500-SMTC used for?

The EM500-SMTC measures three soil parameters: moisture, temperature and electrical conductivity (EC). These measurements provide information on soil conditions that can be used to support irrigation management and agricultural monitoring.

Measurement data is transmitted through a LoRaWAN network to compatible gateways and network servers. When integrated with Milesight IoT Cloud or Milesight Development Platform, users can access sensor information remotely and monitor changes in soil conditions over time.

Advantages

Three-in-one soil monitoring: measures soil moisture, temperature and electrical conductivity using a single sensor.
High measurement precision: designed to provide accurate measurements across different soil types.
Long-range LoRaWAN communication: wireless transmission up to 10 km under line-of-sight conditions.
Robust outdoor construction: IP67-rated transceiver and IP68-rated corrosion-resistant soil probe.
Long battery life: replaceable 19000 mAh battery providing up to 10 years of operation under specified conditions.
Local data storage: supports up to 1,000 historical records with data retransmission and retrieval functions.
Simple configuration: NFC configuration through a mobile application or USB Type-C connection using PC software.
Flexible system integration: compatible with standard LoRaWAN gateways, network servers and Milesight IoT solutions.
Monitoring and alarm functions: supports threshold alarms and temperature change alarms.

Technical specifications

Soil Measurement
Measured parameters	Soil moisture, temperature and electrical conductivity
Moisture range	0 to 100%
Moisture accuracy	±2% (0–50%); ±3% (50–100%)
Moisture resolution	0.01%
Temperature measurement range	-40°C to +80°C
Temperature accuracy	±0.5°C
Temperature resolution	0.1°C
Conductivity measurement range	0 to 20,000 µS/cm
Conductivity accuracy	±3% (0–10,000 µS/cm); ±5% (10,000–20,000 µS/cm)
Conductivity resolution	10 µS/cm (0–10,000 µS/cm); 50 µS/cm (10,000–20,000 µS/cm)
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)
Sensitivity	-137 dBm @ 300 bps
LoRaWAN mode	OTAA / ABP, Class A
Power, Configuration and Data Management
Power supply	1 × 19000 mAh ER34615 Li-SOCl2 replaceable battery
Battery life	Up to 10 years depending on LoRaWAN configuration and operating conditions
Configuration	NFC mobile application, USB Type-C PC software, downlink
Data storage	1,000 entries
Advanced functions	Data retransmission, data retrieval, threshold alarms, temperature change alarms, Milesight D2D Controller
Physical and Environmental Characteristics
Operating temperature	-30°C to +70°C
Relative humidity	0–100% RH (non-condensing)
Ingress protection	IP67 (transceiver); IP68 (soil sensor)
Cable length	2 m
Transceiver dimensions	105.4 × 71 × 69.5 mm
Soil sensor dimensions	88 × 68 × 26 mm; probe length: 50 mm
Installation	Pole, wall or DIN rail mounting (transceiver); buried installation (soil sensor)
Regulatory approvals	CE, FCC, ISED, ICASA, Telec
Environmental compliance	RoHS

Typical applications

Irrigation control: monitor soil moisture conditions to support irrigation management.
Smart agriculture: collect soil moisture, temperature and conductivity measurements for agricultural monitoring.
Greenhouse management: remotely monitor soil conditions in controlled growing environments.
Smart horticulture: monitor growing conditions across horticultural installations.
Golf course maintenance: measure soil conditions to support turf and irrigation management.

What should you check before choosing the EM500-SMTC?

Before selecting the EM500-SMTC, verify the required measurement ranges and accuracies, the availability of a compatible LoRaWAN network and the installation conditions. For Canadian deployments, confirm the appropriate US915 regional configuration and the applicable network settings.

The sensor includes a 2 m cable between the soil probe and transceiver. The enclosure protection ratings, operating temperature range and mounting options should also be considered during installation planning.

Frequently asked questions

What parameters does the EM500-SMTC measure?

The sensor measures soil moisture from 0 to 100%, temperature from -40°C to +80°C and electrical conductivity from 0 to 20,000 µS/cm.

Can the EM500-SMTC be integrated into an existing LoRaWAN network?

Yes. The sensor is compatible with standard LoRaWAN gateways and network servers and supports OTAA and ABP activation in Class A mode.

Is the EM500-SMTC suitable for outdoor installations?

Yes. The transceiver has an IP67 enclosure and the buried soil sensor is rated IP68. The specified equipment operating temperature range is -30°C to +70°C.

How long does the battery last?

The replaceable 19000 mAh battery provides up to 10 years of operation under specified laboratory test conditions. Actual battery life depends on LoRaWAN configuration and operating conditions.

Why choose the Milesight EM500-SMTC?

The Milesight EM500-SMTC combines soil moisture, temperature and electrical conductivity monitoring with long-range LoRaWAN communication in a rugged outdoor sensing system.

Its replaceable battery, local data storage, wireless connectivity and remote data management capabilities make it a practical option for agricultural and horticultural applications requiring long-term soil monitoring.

Technical support from ES Canada

ES Canada supports Canadian technical users in selecting Milesight LoRaWAN sensing solutions according to their measurement requirements, network architecture and environmental monitoring applications.