S150 – Standard Configuration RO Controller

Standard Pump, Valve & TDS Control for Straightforward RO Systems

The S150 is the foundational configuration of this Series 150 microprocessor RO controller platform, providing the core monitoring and control a straightforward commercial reverse osmosis system needs, without the added feed-water monitoring or expanded relay capacity of the other configurations in this lineup. It's a solid fit for systems where standard permeate water quality tracking and reliable pump/valve control cover the requirement, without paying for capability the application doesn't need.

The controller runs the RO system through three relay outputs and four dry contact inputs, managed from a 2-line by 20-character backlit LCD display that shows system status, water quality, operating hours, and temperature in real time. It can directly drive a high-pressure pump up to 1 HP single phase, along with the inlet solenoid valve and automatic flush valve, while dry contact inputs track storage tank level, low and high feed pressure, and a pretreatment lockout signal — all managed with time delays to keep the system operating correctly. Permeate TDS/conductivity monitoring is temperature compensated for accurate readings, and the whole unit is housed in a hinged NEMA 4X enclosure built to hold up in demanding installation environments.

If your application also needs independent feed-water quality monitoring, expanded relay capacity for permeate divert or remote alarm output, or a tank-low-triggered auxiliary relay, the S151, S152, and S153 configurations build on this same base with those capabilities included.

Because this controller is built to order for the specific application it's going into, a few options need to be specified at the time of purchase rather than being fixed in advance.

Core Specifications

Specify at Time of Order

Let us know your required configuration when ordering, or contact us for help selecting the right options for your system.

Why Choose the Series 150 Pre-Assembled Controller

• UL/cUL Certification Available: Select the UL-labeled voltage option at checkout to get a pre-certified control system, without the cost and lead time of certifying a custom-wired panel yourself. This helps satisfy requirements from insurance adjusters and building inspectors and removes the legal uncertainty often associated with custom-wired, uncertified control boxes.
• Engineering Efficiency & Labor Savings: Eliminate 2–4 hours of complex labor, including sourcing parts, drilling enclosures, mounting hardware, and manual wiring. This unit arrives ready to install, allowing your team to focus on system deployment rather than tedious electrical assembly.
• Turnkey "Plug-and-Play" Reliability: Avoid the risk of installation errors and complex onsite troubleshooting. The Series 150 offers a pre-tested, integrated ecosystem where the TDS sensor, relay logic, and flush timing are verified to function together seamlessly right out of the box.
• Unified Warranty & Support: Simplify your maintenance workflow with a single point of contact. Avoid the diagnostic burden of troubleshooting individual components; with this integrated unit, you have one manufacturer to contact for support and warranty coverage, significantly reducing system downtime.
• Professional Uniformity & Scalability: Ideal for operations that require consistency. The standardized wiring harness and rugged NEMA 4X professional finish ensure that every installation looks identical and remains easy to service, providing a polished, high-end appearance that reflects the quality of your entire filtration system.