MQ-SVC20
Smart Irrigation Valve Controller
with Soil & Rain Sensor
Smart irrigation controller and solenoid valve controller for irrigation and agricultural applications.
Overview
MQ-SVC20 is a smart irrigation controller and smart solenoid valve controller designed for irrigation and agricultural applications. It combines valve control with soil and rain sensor data acquisition in one IP68 device. The standard configuration supports 1 valve output (expandable to 2), 1 flow and pressure monitoring input (expandable to 2), 1 RS485 soil temperature & humidity sensor, and 1 rain sensor. With optional 4G or LoRaWAN connectivity, solar power, and a 4000mAh lithium battery, MQ-SVC20 works as a remote valve controller, solar powered irrigation controller, and LoRaWAN irrigation controller for field monitoring and automatic irrigation.
Key Features
- IP68 rated for outdoor and field use
- Smart irrigation controller with valve control — 1 valve output (expandable to 2)
- 1 flow and pressure monitoring input (expandable to 2)
- 1 RS485 soil temperature & humidity sensor input
- 1 rain sensor input for rain detection and skip watering
- Valve ON/OFF status feedback
- Compatible with latching solenoid valves, motorized on/off valves, and RS485 modulating electric valves
- Optional 4G / LoRaWAN wireless network
- External antenna interface
- Solar 6V, 1.1W, 4000mAh lithium battery
- 15 days standby (fully charged, no sunlight)
- 9-28V DC external power input
- Valve power 5V / 9V / 12V configurable
- Micro-USB for monitoring, debugging, and firmware upgrade
- Operating temperature 0-60℃
- Dimensions 130*100*48mm, weight approx. 500g
Technical Specifications
| Item | Specification |
|---|
| Model | MQ-SVC20 |
| Type | Smart Irrigation Valve Controller with Soil & Rain Sensor |
| Valve Control | 1 output (expandable to 2) |
| Valve Types | Latching solenoid valve, motorized on/off valve, RS485 modulating electric valve |
| Valve Power | 5V / 9V / 12V configurable |
| Valve Status Feedback | Yes |
| Flow & Pressure Monitoring | 1 input (expandable to 2) |
| Pressure Sensor Interface | ADC |
| Flow Sensor Interface | Pulse water meter |
| Soil Sensor Interface | 1 x RS485 for soil temperature & humidity |
| Rain Sensor | 1 x rain sensor input, accuracy 0.5% |
| Wireless Network | 4G / LoRaWAN (optional) |
| Antenna | External antenna |
| Power Supply | Solar 6V, 1.1W, 4000mAh lithium battery |
| Battery Life | 15 days standby (fully charged, no sunlight) |
| External Power Input | 9-28V DC |
| USB Port | Micro-USB for monitoring, debugging, firmware upgrade |
| Operating Temperature | 0-60℃ |
| Protection Rating | IP68 |
| Dimensions | 130*100*48mm |
| Weight | Approx. 500g |
Wiring & Terminals

Socket#1 Valve Control Connector (6P)
| Pin No. | Signal | Description |
|---|
| 1 | M1+ | Solenoid valve control + |
| 2 | M1- | Solenoid valve control - |
| 3 | 5V | Flow + pressure power |
| 4 | P1 | Pressure / flow signal |
| 5 | GND | Ground |
| 6 | F1 | Flow signal |
Socket #2 Sensor Connector (6P)
| Pin No. | Signal | Description |
|---|
| 1 | 12V | Soil sensor power |
| 2 | 485-B | RS485-B |
| 3 | 485-A | RS485-A |
| 4 | GND | Ground |
| 5 | rain+ | Rain sensor / external power + |
| 6 | rain- | Rain sensor / external power - |
RS485 soil sensor connects via the RS485-A and RS485-B pins on the Sensor connector
Typical Applications
- Field irrigation
- Orchard irrigation
- Greenhouse irrigation
- Landscape irrigation
- Smart agriculture
- Soil moisture monitoring
- Rain detection and skip watering
- Remote valve control

Ideal for field irrigation, orchard, greenhouse, landscape, and smart agriculture. It can be used as a remote valve controller, solar powered irrigation controller, or LoRaWAN irrigation controller for precision irrigation and agricultural monitoring.
FAQ
Q1: How many valves can MQ-SVC20 control?
A: Standard 1 valve output, expandable to 2.
Q2: What valve types are supported?
A: Latching solenoid valves, motorized on/off valves, and RS485 modulating electric valves.
Q3: How many flow and pressure sensors can I connect?
A: Standard 1 input, expandable to 2.
Q4: What soil sensor does it support?
A: RS485 soil temperature and humidity sensor.
Q5: Does it support a rain sensor?
A: Yes, 1 rain sensor input for rain detection and skip watering.
Q6: Does MQ-SVC20 support 4G and LoRaWAN?
A: Yes. 4G or LoRaWAN is optional.
Q7: Is MQ-SVC20 a smart irrigation controller?
A: Yes. MQ-SVC20 is a smart irrigation controller and smart solenoid valve controller designed for remote irrigation and agricultural monitoring.
Q8: What is the power supply?
A: Solar 6V, 1.1W with 4000mAh lithium battery. External 9-28V DC input also available.
Q9: What is the protection rating?
A: IP68.
Q10: What is the battery life?
A: 15 days standby when fully charged with no sunlight.
Q11: What is the operating temperature?
A: 0-60℃.