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Carwash & Industrial Cleaning

Built for the one industry where everything is always wet.

Carwash controls live inside the wash bay, mounted directly in the path of high-pressure water jets, detergent, wax, and rinse chemicals. Customer-facing kiosks stand outside in all weather, used by people whose hands are already damp. RNC solid-state switches and panels are IP69K sealed, chemically inert, and force-activated. Reliable in every zone of the carwash, from the bay interior to the forecourt payment point.

Key challenge
Direct water jet exposure, chemical attack, outdoor installation, wet-hand operation, and continuous high-cycle use
Relevant products
Switches - Keypads - Panels - Custom
Key technology
Piezo Platform - R-Force Touchless
Jump to The environment PCAP in wet environments Why solid-state Application zones For equipment builders
The environment

What carwash controls actually face.

A carwash is one of the most hostile environments for any electronic interface. Controls inside the bay face direct water jets and concentrated chemicals. Controls outside face weather, UV, frost, and customers who just stepped out of a car. Every interface in every zone must work first time, every time, without maintenance visits between services.

Wash bay
Direct high-pressure water jets
Wash bay controls are in the water path. High-pressure hot water, detergent, foam, wax, and rinse agents hit the panel directly. IP69K is the minimum specification. IP65 is not enough.
Chemicals
Alkaline pre-wash, acid rinse, wax, foam
Carwash chemicals are aggressive. Alkaline degreasers, acid wheel cleaners, surfactant foam, and wax all contact control surfaces. Any seal, membrane, or coating that is not chemically inert will degrade within months.
Outdoor
All weather, vandalism, wet hands
Customer-facing kiosks and program selectors stand outside in rain, frost, and direct sun. Used by customers with wet or damp hands, in the dark, in a hurry. IK10 handles the vandalism reality of an unmanned forecourt.
High cycle
Thousands of uses per day, every day
A busy carwash runs hundreds of vehicles daily. Program selectors, entry panels, and bay controls are pressed thousands of times per day. 50 million actuations means no mechanical wear in any realistic service life.
PCAP in wet environments

Touchscreens are moving into carwashes. Wet hands are not moving out.

The carwash industry is modernising fast. Tunnel operators are installing large PCAP touchscreens for program selection, upsell, and payment. Self-service bays are going touchscreen for the customer experience. The hardware looks great in the showroom. The problem is physics.

PCAP relies on capacitive coupling between the finger and the screen. Wet hands disrupt the signal. Rain drops register as false touches. Gloved fingers do not register at all. A customer approaching the payment kiosk has just stepped out of a car, often in the rain, often in a hurry. The screen that worked fine in the showroom will frustrate them before the wash has even started.

This is not unique to carwashes. Parking payment kiosks, outdoor vending, petrol forecourt terminals, and transit ticketing machines all face the same issue. The answer is not to remove the touchscreen. It is to put reliable physical switches where the interface must work regardless of conditions.

How piezo sensing works
Wet hands defeat PCAP
A film of water between finger and screen short-circuits the capacitive field. The screen registers nothing, or in the wrong place. Piezo switches are force-activated. Water on the hand is irrelevant to the sensing mechanism.
Rain registers as input
Water droplets on an outdoor PCAP screen cause phantom touches, ghost navigation, and unintended selections. In a payment flow, this means failed transactions and frustrated customers. Piezo requires deliberate physical force. Rain does not trigger it.
Critical controls cannot rely on PCAP
Emergency stops, bay entry activation, and staff override panels must work instantly in any condition. Physical solid-state switches have no wet-hand failure mode and no false-trigger risk from water spray or chemical mist.
The hybrid approach works
PCAP displays for visual interfaces, content, and upsell where conditions allow. Solid-state physical switches for every control that must work in wet conditions. Both technologies, each where it belongs.
Why solid-state

IP69K. Force-activated. Works wet. Every time.

IP69K. Survives direct water jets.
Not weather-resistant. Not splash-proof. IP69K means the panel survives high-pressure, high-temperature water spray directed at the surface, the same rating required for wash-bay equipment. Certified, not claimed.
Force activation. Works with wet hands.
Piezo activation requires physical force, not capacitive contact. Wet hands, gloves, and rain do not interfere with the sensing mechanism. Every press registers correctly regardless of what is on the hand or the panel surface.
Chemical resistance. All wash agents.
Alkaline degreasers, acid wheel cleaners, surfactant foam, wax, and rinse additives. The stainless metal surface is chemically inert to all standard carwash agents. No surface degradation over years of continuous chemical exposure.
IK10. Forecourt vandal resistance.
Unmanned forecourts attract vandalism. IK10 is the highest impact resistance rating. The metal housing absorbs strikes that shatter plastic panels and crack membrane surfaces. No exposed components to break or remove.
50M+ actuations. No maintenance cycle.
At 500 vehicles per day with 4 presses each, a busy carwash reaches 50 million actuations in 68 years. There is no mechanical wear to plan for. The button pressed on opening day behaves identically a decade later.
No false triggers. No missed presses.
Force threshold is configurable. Set high enough that water spray and accidental contact do not trigger the switch, while remaining responsive to a deliberate press. No unintended activations, no frustrating non-responses.
Full technology comparison
Application zones

Every zone of the carwash. Every interface covered.

Zone: Wash bay interior
Bay control panels and equipment switches
Controls mounted inside the active wash zone face direct water jets, chemical mist, and continuous humidity. IP69K certified panels operate through the full wash cycle without covers, enclosures, or moisture-related failures.
Zone: Customer kiosk
Program selection, payment confirmation, PIN entry
Outdoor kiosks used by customers with wet hands in all weather. Where a PCAP touchscreen struggles, a solid-state keypad or program selector works first time. No phantom inputs, no failed touches, no customer frustration at the point of sale.
Zone: Emergency and safety
Emergency stops and safety overrides
Emergency stop controls must activate on first contact, in any condition, with any hand. Physical solid-state piezo has no wet-hand failure mode and no false-trigger risk from water spray. The switch that must always work, always does.
Zone: Staff and maintenance
Operator panels, chemical dosing, system control
Staff access panels and chemical dosing controls used by operators working in a wet environment. Custom panels with any layout, fully sealed, designed for the specific controls your system requires.
For equipment builders

The interface components for carwash equipment. Designed in, not retrofitted.

RNC works with carwash equipment manufacturers and kiosk builders to supply the sealed interface components that go into the machine. Switches, custom control panels, keypads, and multi-function panels designed to your exact mechanical and functional specification.

Whether you are building tunnel equipment, self-service bay controllers, payment kiosks, or forecourt management panels, we supply the interface hardware that will outlast the equipment around it with no maintenance requirements and no weather-related failures.

Discuss your equipment design
Custom wash bay panels
Control panels for your specific equipment layout. Any switch configuration, any legend, engraved and infilled. Fully sealed, IP69K rated, ready to mount inside the wash zone.
Kiosk keypads and program selectors
Sealed outdoor keypads for payment PIN entry, wash program selection, and customer interaction. Work reliably with wet hands in rain and frost. No PCAP failure modes at the point of customer contact.
Volume OEM supply
Components manufactured in-house and supplied in volume. Consistent specification across every unit you ship. No third-party dependency, no supply variance between production batches.
Design-in support
Mechanical drawings, electrical specs, evaluation samples. We work with your engineering team from concept through production, including integration with PCAP display systems where required.
Relevant products

Products for carwash and industrial cleaning equipment.

Switches
IP69K bay controls. Works wet. No false triggers from water spray or chemical mist.
Keypads
Outdoor program selectors and PIN entry. Sealed stainless, works with wet hands, IK10 rated.
Panels
Custom wash bay panels. Any layout, any legend, fully sealed for direct water jet exposure.
Custom
Equipment-specific assemblies. Tunnel controls, kiosk interfaces, maintenance panels built to specification.
Carwash & Cleaning
Building carwash equipment or kiosks?

Tell us your equipment type, zones, and interface requirements. We will specify the right sealed solid-state components for every part of the wash.

Start a conversation
PCAP alternative
Replacing unreliable touchscreens?

Understand how force-based piezo sensing solves the wet-hand and false-input problems that capacitive touchscreens cannot handle in outdoor and wet environments.

Piezo technology