RO Controllers Ensure the Safe Operation of RO Equipment

Reverse osmosis controller is a device used to monitor and control the operation of reverse osmosis systems. It has functions such as monitoring and displaying key parameters, controlling system operation, abnormal condition alarms, data recording and communication. It is widely used in water treatment and industrial applications of reverse osmosis systems to ensure the stable operation of the system and the compliance of water quality.

Specification
Working Principle
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Specification

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ROC-2015 Single Stage RO Controller
ROC-2315 Single Stage Single Channel RO Controller
ROC-8221 Single Stage Double Channels RO Controller

Small size and simple single stage integration reverse osmosis control system.

Main Technical Data

Table 1: ROC-2015 Single Stage RO Controller Main Technical Data
Single Detection	Dry contact input	Dry-run protection function
		Low-pressure protection function
		High-pressure protection function
		Water level limit
		High-pressure and low-pressure flushing function
Control Port	Dry contact output	Water feeding solenoid valve
		RO flushing solenoid valve
		Booster pump
		Low-pressure water pump
Power Supply	AC 220V(±10%), 50/60Hz
Working Environment	Temperature: (0–50) °C Relative Humidity: ≤ 85% RH (no condensation)
Dimension (H × W × D)	48 mm × 96 mm × 80 mm
Hole Size (H × W)	44 mm × 92mm
Installation	Panel mounted, fast installation
Certification	CE

Single stage RO controller used for conductivity monitoring and process program control.

A ROC-2315 single stage single channel RO controller

Main Technical Data

Table 2: ROC-2315 Single Stage Single Channel RO Controller Main Technical Data
Signal Detection (six channels)	Dry contact input	Raw water no water protection
		Low pressure protection
		High pressure protection
		Pure water tank high level
		External control mode signal
		Running reset
Control Port (five channels)	Dry contact output	Raw water pump	SPST-NO Load.capacity AC 220V/3A Max AC 110V/5A Max
		Inlet valve
		High pressure pump
		Flush valve
		Conductivity over-limit drainage valve
Measurement Detection Point	Product water conductivity
Measurement Range (ROC-2315)	Product water conductivity: 0.1–200 μS/cm, 1–2000 μS/cm or 10–999 μS/cm (with different sensor) Product water Temp.: 0–50 °C
Temp. Compensation	Automatic compensation, with 25 °C as the reference temperature
Accuracy	1.5% (FS)
Working Environment	Temp.: (0–50) °C Relative Humidity: ≤ 85% RH (none condensation)
Storage Environment	Temp.: (-20 to +60) °C Relative Humidity: ≤85% RH (none condensation)
Power Supply	AC 220V (±10%) 50/60 Hz
Dimension (H × W × D)	96 mm × 96 mm × 130 mm
Hole Size (H × W)	91 mm × 91 mm
Installation	Panel mounted, fast installation

Singe stage double channels integration RO controller used for conductivity monitoring and process program control.

A ROC-8221 single stage double channels RO controller

Main Technical Data

Table 3: ROC-8221 Single Stage Double Channels RO Controller Main Technical Data
Signal Detection (seven channels)	Dry contact input	Raw water tank level: double channels	Low level
		Raw water tank level: double channels	High level
		Pure water tank level: double channels	Low level
		Pure water tank level: double channels	High level
		Low pressure protection
		High pressure protection
		Pre treatment backwash signal
Control Port (five channels)	Dry Contact Output	Raw water pump	SPST-NO Load capacity AC 220V/3A Max AC 110V/5A Max DC 24V/3A Max
		Inlet valve
		High pressure pump
		Flush valve
		Conductivity over-limit drain valve
Measure Detection Points	Raw water conductivity, product water conductivity, raw water Temp.
Conductivity Measurement Range	Raw water conductivity	Cell constant: 10.0 cm^-1	(0–20000) uS/cm
	Raw water conductivity	Cell constant: 1.0 cm^-1	(0–2000) μS/cm
	Product water conductivity	Cell constant: 1.0 cm^-1	(0–2000) μS/cm
	Product water conductivity	Cell constant: 0.1 cm^-1	(0–200) μS/cm
Medium Temp.	0–50 °C
Accuracy	1.5% (FS)
Communication	RS 485 communication (Modbus protocol)
Working Environment	Temp.: (0–50) °C Relative Humidity: ≤ 85% RH (none condensation)
Storage Environment	Temp.: (-20 to +60) °C Relative Humidity: ≤ 85% RH (none condensation)
Power Supply	DC 24V±4V
Protection Level	IP65 (with back cover)
Dimension (H × W × D)	130 mm × 180 mm × 60 mm
Hole Size (H × W)	122 mm × 172 mm
Installation	Panel mounted, fast installation

Working Principle

Dry Run Protection: When the raw water supply is interrupted, to prevent the system from running idle, the controller will activate the dry run protection function. If the water supply pressure or level returns to normal, the controller will restart the RO system operation.

Low Pressure Protection: When the current stage pre-filter system is in the flushing, regeneration, or the security filter is clogged, it cannot provide normal water supply pressure to the RO system (i.e., low pressure is insufficient), the controller temporarily shuts down the entire RO system. After the pressure recovers for 1 minute, the RO control system will perform the first trial startup and run the RO system.

High Pressure Protection: When the system experiences overpressure, the controller proactively shuts down the entire RO system. After the high pressure is eliminated for 1 minute, the controller will perform the first trial run.

Pure water tank level control: When the pure water tank level is at the preset low level, the controller immediately starts the RO system to produce water. The system continues until the pure water tank level reaches the predetermined high level, at which point the system completes the membrane flushing and automatically switches to standby mode.

Timed membrane flushing: When the protection device and the operating status are normal, the system will perform the first membrane flushing each time it is powered on. Subsequently, membrane flushing occurs each time the low water production is activated, and after the production tank is full, the system automatically completes membrane flushing.

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