Description
Crystal Quest S-150 RO Microprocessor Controller – Smart Automation & Protection for Reverse Osmosis Systems CQE-CV-S150E
The Crystal Quest S-150 RO Microprocessor Controller is a compact, intelligent control system designed to automate, monitor, and protect commercial reverse osmosis systems. Engineered with OEM flexibility in mind, the S-150 provides reliable system control, water quality monitoring, and equipment protection in one easy-to-use platform.
Ideal for commercial RO systems, light industrial applications, water treatment integrators, and OEM manufacturers, the S-150 helps simplify operation while improving system reliability and reducing manual oversight.
Complete Reverse Osmosis System Control
The S-150 continuously monitors key operating conditions and automatically controls critical reverse osmosis functions to help keep your system running efficiently. The controller manages:
• High-pressure RO pump operation — automated startup and shutdown control
• Inlet solenoid valve — regulates feedwater flow to the system
• Automatic membrane flush valve — helps maintain membrane performance and longevity
• Permeate divert valve — supports water quality management during operation
• Remote alarm outputs — alerts operators to system issues and operating conditions
Unlike many controllers in its class, the S-150 can directly operate a single-phase RO pump motor up to 1 HP without requiring external motor controls, simplifying installation and reducing system complexity.
Real-Time Water Quality Monitoring
The built-in display continuously provides system performance data, allowing operators to monitor critical RO parameters at a glance. Monitors:
• Permeate TDS and conductivity levels — real-time water quality tracking
• Water temperature — temperature-compensated monitoring for improved accuracy
• Operating hours — helps simplify maintenance scheduling
• System operating status — quick visibility into overall performance
• Alarm conditions and safety inputs — enhanced equipment protection
Intelligent Equipment Protection
The S-150 helps protect reverse osmosis equipment by monitoring important system conditions before damage occurs. Protection features include:
• Low feed pressure monitoring — helps prevent pump damage from insufficient water supply
• High pump pressure protection — safeguards critical RO components
• Pretreatment lockout integration — prevents operation when pretreatment systems are not functioning properly
• Storage tank level monitoring — automatically starts and stops production based on tank demand
Why Commercial Operators Choose the S-150
• Designed specifically for reverse osmosis systems — purpose-built RO automation and monitoring
• Direct 1 HP pump control capability — reduces the need for additional motor controls
• Real-time TDS and conductivity monitoring — continuous water quality visibility
• Automatic membrane flush functionality — supports membrane longevity and performance
• Integrated safety protection features — helps protect pumps and RO equipment
• Compact NEMA 4X enclosure — durable protection for demanding environments
• OEM-friendly design — flexible configuration for a wide range of system applications
• Easy-to-read display — clear operating status and performance information at a glance
Key Monitoring Functions
• RO high-pressure pump motor
• Inlet solenoid valve
• Automatic flush valve
• Low feed pressure switch
• High pump pressure switch
• RO storage tank level switches (1 or 2)
• Permeate TDS/conductivity monitoring
• Water temperature monitoring
• Pretreatment lockout status
• Total operating hours tracking
Control Relay Outputs
• Inlet Solenoid Valve: 120/240 VAC, 5 Amp maximum
• RO Pump: 120/240 VAC, up to 1 HP single-phase motor
• Flush Solenoid Valve: 120/240 VAC, 5 Amp maximum
• Permeate Divert Valve Control
• Remote Alarm Output
Technical Specifications
Power Requirements
• 120/240 VAC (-15%/+10%)
• 50/60 Hz
• 25 Watts
Inputs
• 4 dry-contact inputs
• 2 TDS/conductivity inputs
Outputs
• 5 relay outputs
Display
• 2-line × 20-character LED display
Enclosure
• NEMA 4X enclosure
• Dimensions: 8" × 6" × 4"
Custom Configuration Available
• Larger enclosures available for systems requiring integrated motor starters and larger 3-phase commercial RO applications
Ideal Applications
• Commercial reverse osmosis systems
• OEM water treatment equipment
• Light industrial water purification systems
• Restaurants and food service operations
• Manufacturing and process water applications
• Commercial drinking water systems
• Water treatment integrators and system builders
The S-150 is an excellent solution for facilities that need reliable RO automation, water quality monitoring, and equipment protection without the complexity of larger industrial control platforms.
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Crystal Quest One-Year Limited Warranty
CRYSTAL QUEST® warrants your CRYSTAL QUEST® Water Filter Systems for one year from the date of purchase (except filter cartridges and UV bulbs ) against all defects in materials and workmanship, when used in compliance with the Use and Care Manual. CRYSTAL QUEST® disclaims all implied warranties, including without limitation, warranties of merchantability and fitness for a particular purpose. If for any reason the product proves to be defective within one year from the date of purchase the customer would be responsible for all shipping charges and the unit should be shipped to CRYSTAL QUEST®. The entire system will be repaired or replaced without charge for the repairs or replacement. Please package your CRYSTAL QUEST® unit carefully to avoid damage in transit. This warranty gives you specific legal rights, and you may have other legal rights which vary from state to state. CRYSTAL QUEST® assumes no responsibility for incidental or consequential damages; for damages arising out of the misuse of the product or the use of any unauthorized attachment. Some states do not allow the exclusion or limitation of implied warranties or incidental or consequential damages, so the above limitations or exclusion may not apply to you.
*Refunds of Crystal Quest products will be issued in the form of a Crystal Quest gift card.
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