Pool, Spa & Whirlpool

Interface solutions for the pool, spa, and whirlpool industry.

Topside controls fail. Membrane overlays delaminate from moisture. Capacitive touch ghost-triggers from water and steam. Pneumatic buttons stick and leak. RNC solid-state technology eliminates the interface failure modes that define this industry, from hot tub topsides through underwater pool controls to outdoor water play activation.

Key challenge
Moisture ingress, chemical resistance, underwater operation, wiring complexity, and long product life in permanently wet environments
Relevant products
Key technology
No more membrane failures
Solid metal, glass, or polycarbonate replaces the overlay that keeps failing
One cable, all functions
Communication protocol replaces individual wiring for every switch
Works fully submerged
Controls operate underwater in chemically treated water indefinitely
Outlasts the product
50M+ activations eliminates the topside replacement cycle
The environment

What pool and spa controls face.

The interface is the most replaced component in most spa systems. That replacement cycle is the problem RNC's technology eliminates.

Chemical
Continuous chemical attack
Chlorine, bromine, ozone, and treatment agents attack surfaces and seals without stopping.
Moisture
Steam, splash, and submersion
Steam, condensation, wet hands, and splash are constant. Often underwater operation too.
Outdoor
UV, frost, and temperature extremes
UV, freeze-thaw, and thermal cycling kill adhesives and seals faster than the product.
Use
Vandalism and high-frequency operation
Commercial use adds vandalism and sustained high-frequency actuation.
Hot tubs & spas

What spa manufacturers currently specify. And why it fails.

The topside panel is the number one warranty and service issue across the spa industry. Three technologies dominate. Each is a compromise.

Control type
Membrane touchpad

Moisture migrates through the membrane overlay. Condensation forms behind it. Buttons become unresponsive or erratic. The panel needs replacement every 2-3 years. This is the dominant topside in the industry, and the dominant failure mode.

Control type
Capacitive touch

Ghost-triggering from water droplets and steam. Unresponsive with wet hands. Sensitivity drift from humidity. Capacitive sensing was designed for dry environments. A spa is the opposite of that.

Control type
Pneumatic air buttons

Avoids the electronic issues but sticks, leaks, and severely limits the number of functions that can be controlled. Each button needs its own air tube run. No LED feedback, no programmable behavior, no multi-function capability.

RNC solid-state
No membrane to delaminate
No capacitive drift in wet
No pneumatic tubing
Senses through metal, glass, acrylic
Pool & commercial aquatics

Pool automation and commercial facility controls.

Pool automation controllers manage filtration, heating, chlorination, lighting, pumps, and water features. The control panel is the product. It sits outdoors or in a pump room, exposed to splash, humidity, chemical fumes, and UV.

Commercial aquatic facilities add public use volumes, vandalism, and regulatory requirements. The interface must survive the chemical environment and deliver reliable operation across a product lifecycle measured in decades, not years.

Chemical-resistant control surface
Metal or glass surface withstands chlorine, bromine, salt chlorination byproducts, and aggressive pool chemicals without surface degradation or seal failure.
Vandal-resistant construction
One-piece metal construction with no removable components. No buttons to pry, no panels to crack, no overlays to peel. Built for public pool environments.
Decades, not years
50M+ activations. IP69K sealed. The interface outlasts the pool automation system it controls. No replacement cycle, no scheduled maintenance.
Underwater controls

Counter-current, lighting, and in-pool activation.

Counter-current systems, swim-jet controls, underwater lighting, and in-pool activation points must operate fully submerged in chemically treated water. This is the most demanding application for any control interface.

Conventional switches rely on shaft seals and O-rings that degrade from chemical exposure and thermal cycling, creating a failure mode that worsens over time. There is no maintenance access underwater.

No seal to degrade
The control surface is continuous solid metal, glass, or polycarbonate. No shaft seals, no O-rings, no panel penetrations. There is no seal because there is nothing to seal.
IP69K. Tested to 300 metres.
Potted construction minimises thermal shock when water temperatures change rapidly, preventing condensation and stress cracking that hollow-cavity switches experience.
LED feedback underwater
Integrated LED illumination provides visual feedback, status indication, and ambient lighting through the control surface. Color, intensity, and behavior are programmable.
Water features

Water features, fountains, and interactive play.

Splash pads, play fountains, and public water feature installations need controls that survive outdoor exposure, continuous water contact, and sustained use by children and the public.

Vandal-proof
One-piece metal construction
Ground-mounted, bollard-mounted, and wall-mounted activation points withstand deliberate abuse. Nothing to pry, crack, or remove.
Sealed
IP69K for standing water and spray
Standing water, direct spray, and full submersion. Sealed by construction, not by gaskets or O-rings that degrade over time.
Accessible
Low force from 0.25N
Adjustable activation force ensures children can operate the controls reliably. No minimum hand size, no grip strength requirement.
Off-grid
Ultra-low power operation
Battery or solar operation for installations without mains power. Remote splash pads, park fountains, and standalone water play features.
Why solid-state piezo
Six reasons spa and pool manufacturers switch to piezo.
No membrane to fail
Solid metal, glass, or polycarbonate. Nothing to delaminate, nothing for moisture to penetrate.
Works fully submerged
IP69K sealed. Withstands chlorine, bromine, ozone, and all pool chemicals. No seals to attack.
Senses through the surface
Stainless steel, glass, polycarbonate, acrylic. The material in the water is the control surface.
One cable, all functions
PT Plus consolidates 6-8 functions onto a single cable. Simpler assembly, fewer errors.
LED illumination built in
Visual feedback through the control surface, above and below water. Color and behavior programmable.
50M+ activations
Outlasts the product it is built into. No replacement cycle, fewer warranty claims.

RNC piezo panels and switches are in development and deployment with European spa and pool equipment manufacturers, providing solid-state topsides and individual control points that eliminate the membrane failure mode and simplify wiring architecture. Underwater piezo switches are deployed in counter-current and pool lighting installations, operating fully submerged in chemically treated water with zero seal-related failures.

Pool, Spa & Whirlpool
Building a pool or spa product?

Tell us about your control interface requirements. We will show you how solid-state technology eliminates your biggest interface headaches.

Discuss your application
Replace membrane topsides
Replacing membrane topsides?

Ask us about a direct replacement path from membrane or capacitive to solid-state piezo.

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