IP54 vs IP67: What Forecourt Displays Really Need

By AVS Display · Engineering · 2025

Ask a forecourt operator what kills a Price Change Unit (PCU) and they rarely say "the LEDs." They say water. Driven rain, monsoon storms, condensation under a canopy, the wash-down hose a contractor turns on a little too close. A petrol-station price display lives outdoors at the top of a monolith for years, switching on at dawn and holding full brightness through tropical downpours. The single number that tells you whether it will cope is the IP rating — and most buyers read it wrong.

What the IP code actually means

IP stands for Ingress Protection, an international standard (IEC 60529). The two digits after it are not a score; each one rates a specific threat. The first digit rates protection against solids — dust and debris — on a scale of 0 to 6. The second digit rates protection against water, from 0 up to 8. A higher number is stricter, and the two are tested independently. So "IP67" means dust-tight (6) and protected against temporary immersion (7) — not "67 out of 100."

That distinction matters because the failure modes are different. Dust is an abrasive and an insulator; over years it works into housings, coats heat sinks and degrades photocells. Water is the fast killer — one breach and a 230 VAC display becomes a short circuit. On a forecourt you are defending against both at once.

IP54 vs IP67 on the forecourt

IP54 means dust-protected (not fully sealed, but ingress is limited enough that it won't interfere with operation) and protected against splashing water from any direction. That is genuinely enough for many sheltered positions — a display tucked well under a deep canopy, a controller cabinet mounted inside a kiosk, indoor or semi-indoor units. AVS rates its PCU Controller (which drives up to 8 PCUs at 230 VAC) at IP54, because it lives in a protected enclosure rather than exposed at the top of a pole.

IP67 raises both bars: dust-tight (no ingress at all) and able to survive temporary immersion in water — submersion to a defined depth for a defined time. For the price digits themselves, sitting unshielded at the crown of a monolith and taking rain head-on, this is the grade you want. AVS offers its PCU price faces in IP54 or IP67 precisely so the rating can be matched to the mounting position rather than over- or under-specified across the board. The modular low-profile PCU panels (10 mm, SMD LEDs, CNC-cut UV-resistant HDPE) are built to IP67 for fully exposed faces.

Why connectors are the part everyone forgets

A display can carry a flawless IP67 casing rating and still drown — through its cables. Every PCU has power and data running into it, and a joint is exactly where water finds a path. That is why AVS uses IP68 cabling connectors. IP68 is the highest water grade in the standard: protection against continuous immersion under conditions agreed with the manufacturer, stricter than the IP67 face it serves. The logic is simple — the connector is the most vulnerable link, so it gets the strongest seal. A chain is only as waterproof as its weakest joint.

IP54 vs IP67 vs IP68 connectors at a glance

Grade	Dust	Water	Where AVS uses it
IP54	Dust-protected (limited ingress)	Splashing from any direction	PCU Controller, sheltered / semi-indoor units
IP67	Dust-tight (no ingress)	Temporary immersion	Exposed PCU price faces, modular panels
IP68 (connectors)	Dust-tight (no ingress)	Continuous immersion	All power & data cabling joints

Why a sealed casing alone isn't enough

Here is the part the IP number doesn't tell you. A perfectly sealed enclosure traps air — and air in Malaysia carries moisture. As the unit heats up by day and cools at night, that trapped humidity condenses on the coldest surface inside, which is usually the PCB. Over months, condensation corrodes solder joints and creates the intermittent "dry joints" that cause flickering digits and dead segments. Sealing the box can make this worse, not better, if the electronics inside aren't protected too.

AVS counters this on two fronts. First, every board is conformal-coated — a thin protective film over the PCB that resists moisture, dust and corrosion even when humid air gets inside. Second, the units are validated before they ship. AVS runs a cold-chamber (freezer) dry-joint test that deliberately thermal-cycles the boards to surface weak solder joints, a 48-hour burn-in that runs units continuously to catch early-life failures, and a vibration test for the knocks of transport and the buffeting of an exposed pole. An IP rating tells you about the seal; this regime tells you the sealed thing survives years of forecourt service.

Practical guidance: matching the grade to the site

• Exposed price faces at the top of a monolith or pylon — specify IP67.
• Coastal sites and high-rainfall regions — default to IP67; salt air and monsoon rain leave no margin for splash-only protection.
• Controllers and cabinets in a kiosk or sheltered enclosure — IP54 is appropriate and cost-effective.
• Every cabling joint — insist on IP68 connectors, regardless of the face rating.
• Always pair the IP grade with conformal-coated boards and tested units to defeat condensation, not just rain.

One more design note specific to tropical service: AVS PCUs are built for a −30 to +60 °C operating range with UV-resistant black silicone plotting and aluminium-extrusion or HDPE casings, so the seal and the materials around it hold up under the same sun and rain the IP rating is defending against.

Talk to AVS

Not sure whether a site needs IP54 or IP67? Tell us the mounting position, the canopy coverage and the region, and our engineers will spec the right grade — face, controller and connectors — for your forecourt. Compare the full range on our Price Change Units page, or read how units are validated on our Certifications page.