A panel PC might look like a simple touchscreen with a computer behind it — but getting the specification right is critical. From touchscreen type and IP rating to brightness and vibration tolerance, every detail affects how reliably the PC performs in the field.
If you’re planning a new installation or upgrading existing HMIs, whether on a factory floor, in a marine vessel, or inside a transport cabinet, here’s what to consider.
1. Projected capacitive vs. resistive touchscreens
The touchscreen is the heart of your panel PC interface, and your choice affects usability over the long term.
Projected capacitive touchscreens are sharp, bright and responsive, just like a smartphone. Optically-bonded capacitive screens perform best in bright light. They are multi-touch capable and highly durable with toughened glass. However, they normally require direct skin contact to operate. Standard gloves won’t register unless you specify a glove-capable model, although thin gloves may be usable. Operation may also be affected by water drops on the screen, although special PCap touchscreens are now available that ignore drops on screen allowing operation in wet conditions. These screens are ideal for control rooms, protected outdoor environments or industrial sites where operators use bare hands or special conductive gloves.
Resistive touchscreens work with any glove, stylus or finger pressure. They offer excellent resistance to dust, moisture and EMI, and work even when the screen is wet. They have a slightly lesser display clarity though and are less responsive for fast gestures. They are suited for use in food processing, mining, transport or industrial settings where operators wear gloves.
2. Mounting and casing styles
The way a panel PC is mounted is often dictated by the application and accessibility:
- Panel mount (rear clip mounting): This is the most common type of mounting. The PC is installed from the front with clips securing it from behind a panel cut-out. Offers a clean finish with an IP65-rated front bezel.
- Panel mount (front screw mounting): This is ideal where there’s no rear access. The PC is secured from the front using visible screws or bolts. This mounting is common in retrofit or enclosure-mounted systems.
- VESA mount: This allows for flexible mounting on arms, stands or walls. This mounting is used in vehicles, kiosks or operator stations.
- Open frame: This casing is designed for kiosk builders or OEM integration where the surrounding housing provides protection.
- Fully sealed IP66 VESA units: Designed for outdoor, marine, or washdown areas, these units are fully waterproof and dustproof, with corrosion-resistant housings.
Always verify the IP rating, and ensure the mounting method doesn’t compromise it.
3. Understanding waterproof and dustproof ratings
Not every panel PC is truly sealed. Here’s what the common IP ratings mean in practical terms:
| IP Rating | Description | Typical Use |
|---|---|---|
| Non-IP Rated | Minimal protection – indoor control rooms only | Dry, clean environments |
| IP65 Front Only | Dust-tight, protected from water jets on the front face | Standard panel mount PCs |
| IP66 All Around | High-pressure washdown and outdoor exposure | Marine, food processing, outdoor control cabinets |
| IP65 Front + IP54 Rear | Good all-round protection with vented rear | Semi-protected factory or plant environments |
If you’re installing near water, chemicals, or dust, don’t settle for less than an IP65-rated front. Outdoor or washdown sites should always specify IP66 all-round protection.
4. Brightness and readability
Display brightness can make or break operator usability.
- Standard brightness: 250–400 nits, ideal for indoor control rooms and panels.
- High brightness (outdoor readable): 1,000–1,500 nits for daylight or outdoor enclosures.
- Auto dimming: Adjusts brightness based on ambient light, improving comfort and extending backlight life.
- Wide dimming range: Especially important for marine or vehicle use, where screens must dim for night operation.
5. Temperature ratings
Temperature extremes are a common cause of failure. Look for panel PCs with appropriate operating temperature ranges for the application.
- Standard industrial: 0°C to +50°C – suitable for indoor or controlled environments.
- Wide temperature: -20°C to +70°C – required for outdoor, vehicle or unconditioned enclosures.
Remember that direct sunlight can heat up a screen and enclosure well beyond the ambient temperature. Always account for solar loading and internal heat from other components. Adding shading or ventilation can improve reliability.
6. Shock and vibration resistance
Applications in vehicles, vessels, or heavy machinery expose PCs to constant vibration. Look for:
- MIL-STD-810 or IEC 60068 compliance for shock and vibration testing.
- Solid-state drives (SSD) instead of spinning disks.
- Rugged mounting brackets and cable retentions to avoid fatigue.
In marine and vehicular systems, vibration resistance isn’t optional — it’s essential for uptime.
7. Anti-vandal and public-facing screens
For public kiosks, ticketing, and transport systems, vandal resistance is a must.
- Anti-vandal glass: Typically 6mm toughened glass to resist impact and scratching.
- Flush-mounted bezels: Prevent dirt and moisture ingress and simplify cleaning.
8. Marine-grade considerations
Marine environments demand more than waterproofing. A true marine-grade Panel PC includes:
- Conformal coating to protect internal circuitry from salt corrosion.
- Powder-coated or stainless-steel housings for corrosion resistance.
- IP66/67 all around protection for exposed environments.
- IP65 front / IP54 rear for protected locations such as ship’s bridge or equipment rooms.
- ECDIS compliance to ensure colour calibration and day/dusk/night modes.
- Compliance with IEC-60945, the marine electronics standard for vibration, temperature, humidity, and EMC.
These additional protections help ensure performance and long service life in bridge consoles, engine rooms and offshore platforms.
At ESIS, we help engineers and project managers specify panel PCs that meet real-world demands, from indoor control panels to marine navigation consoles and outdoor enclosures.
Send us your requirements, and we’ll recommend the best-fit panel PC for your application — rugged, reliable, and ready for years of service.
