Industrial Touchscreen & Panel PC Questions from Quora, Answered by a Factory

Question 1

What is the difference between a commercial and an industrial panel PC?

Accepted Answer

There is no legal definition, so the difference lies in the design choices behind the label. A commercial panel PC is usually built from consumer or office-grade parts: a standard LCD, a cooling fan, a desktop-style power supply and a 0 to 40 °C rating, which is fine at a reception desk or retail counter. An industrial panel PC is designed to run unattended for years: fanless cooling, an industrial or embedded motherboard, a sealed front (often IP65), a wide DC input, a wider operating temperature range and serial, CAN or isolated I/O for machines. Long-term availability also matters, because a model that changes every year breaks your certification and spare-part plans. Our guide to industrial vs commercial monitors lists the differences that matter most.

Question 2

What is the difference between an HMI and a PLC, and can an HMI replace the PLC?

Accepted Answer

They do different jobs. The PLC reads sensors, runs the control logic in a deterministic scan and drives outputs; it keeps working if the screen goes dark. The HMI is the operator's window into that logic: it shows status, alarms and trends, and writes setpoints or commands back to the PLC over Modbus, EtherNet/IP, PROFINET or OPC UA. On most machines an HMI cannot safely replace the PLC, because touch panels and PCs are not designed for hard real-time control or safety functions. What can change is the hardware: a dedicated HMI panel, an industrial panel PC running SCADA or web HMI software, or a PC-based soft PLC for small, non-safety tasks. Our comparison of HMI panels and industrial panel PCs explains when each fits in industrial automation.

Question 3

What is the best operating system for industrial systems where safety and reliability matter?

Accepted Answer

There is no single best OS; it depends on what the computer does. Hard real-time control and safety functions belong in a PLC, a DCS or a real-time OS such as VxWorks or QNX, not in a general-purpose desktop OS. For the operator layer, the choice is usually Windows or Linux. Windows IoT Enterprise LTSC is popular where the SCADA or HMI vendor only supports Windows, and its long servicing channel avoids surprise feature updates. Linux (Debian, Ubuntu LTS or a Yocto or Buildroot image) suits web HMIs, gateways and locked-down appliances, and Android is common on ARM terminals. Whatever you pick, freeze a tested image, disable automatic updates on production machines and patch in maintenance windows. When you ask about a panel PC, name your HMI software first so the board and OS can be matched to it.

Question 4

Is it possible to build a fanless PC with no moving parts at all?

Accepted Answer

Yes, and that is how most industrial computers are built. A PC with no moving parts needs three things: a low-power processor, solid-state storage such as an SSD or eMMC instead of a hard disk, and a power supply without a fan, usually an external adapter or a DC input. Heat is conducted from the CPU through a copper or aluminium block to the metal housing, which acts as the heatsink, so the size of the case and the air around it set the real limit on processor power. Without fans there is nothing to clog with dust and no bearing to wear out, which is why a fanless panel PC suits dusty plants and closed cabinets. Read our guide to fanless panel PC thermal limits before you choose a CPU.

Question 5

What is an industrial touch screen monitor?

Accepted Answer

It is a display with a touch sensor that is built for equipment rather than for a desk. Compared with a consumer touch monitor, industrial touchscreen monitors usually have a metal housing or an open frame for panel mounting, a sealed front (commonly IP65), a wider operating temperature range, toughened cover glass and touch controllers tuned for gloves, water or electrical noise. They are also designed for long running hours and long product availability, so the same model can be bought again years later. Inputs are typically HDMI, VGA or DisplayPort with USB for touch, and many accept a DC supply. Typical uses are machine HMIs, kiosks, locker screens, vending machines and medical carts. See how to choose an industrial touch screen monitor for a selection checklist.

Question 6

Which is better, a resistive or a capacitive touchscreen?

Accepted Answer

Neither is better everywhere. Projected capacitive (PCAP) touch sits behind a glass cover, so it gives a clear image, true multi-touch and no layer that wears out, and a well-tuned controller can work with thin gloves and light water. Its weak points are thick or non-conductive gloves, heavy water and strong electrical noise, unless the controller is tuned for them. Resistive touch responds to pressure, so any glove or stylus works and water drops are ignored, but its plastic top film scratches and wears, it lowers brightness and contrast, and most versions are single-touch. Resistive is still found on older HMIs and where heavy gloves are mandatory; PCAP is the usual choice for new industrial touchscreen monitors, kiosks and locker screens. Infrared, a third option for large sizes, is compared in our infrared vs capacitive guide.

Question 7

Does water damage a capacitive touch screen?

Accepted Answer

Water on the glass does not damage a capacitive sensor, because the sensor sits behind the cover glass. The real issues differ. First, water is conductive, so drops or a film of rain can be read as touches or can mask real ones; a controller with water-rejection firmware handles drops and light rain much better than a phone-style controller. Second, water that gets past the front seal can damage the LCD and electronics, which is a sealing problem, not a touch problem. For wet locations, specify a front sealed to at least IP65 and a cover glass without gaps where water can sit, then test touch with the water and gloves of your real site. For wet areas, ask to see a sample of our industrial touchscreen monitors handle water. Our waterproof touch screen guide explains the IP codes.

Question 8

What is the difference between IP65, IP66 and IP67?

Accepted Answer

All three start with 6, which means dust-tight. The second digit is the water test defined in IEC 60529. IP65 means protected against low-pressure water jets from any direction, using a 6.3 mm nozzle. IP66 means protected against powerful jets, using a 12.5 mm nozzle at a much higher flow. IP67 means protected against temporary immersion, typically 1 m for 30 minutes. A higher number is not automatically better: immersion and jets are different tests, so a product rated only IP67 has not necessarily passed the jet test, which is why you see dual ratings such as IP66/IP67. For hot, high-pressure washdown, look for IP69K. On touch screens, also check whether the rating covers the front only or the whole enclosure. Our waterproof touch screen guide explains this, and each industrial panel PC datasheet states its rating.

Question 9

What is the best LCD display technology for outdoor signage in bright sunlight?

Accepted Answer

For direct sun, the main levers are brightness, reflection and heat. A typical indoor LCD is around 250 to 400 nits, while outdoor readable displays are typically 1,000 to 2,500 nits or more, using a high-brightness LED backlight. Brightness alone is not enough. Optical bonding removes the air gap between the cover glass and the LCD, which cuts internal reflections and improves contrast in sunlight, and anti-reflective glass helps further. High-brightness backlights produce heat and the sun heats the panel, so look for wide-temperature LCDs with a high clearing point and an enclosure designed to move heat away. Transflective LCDs use sunlight itself and suit low-power devices, but their colour is weaker. Our sunlight-readable display guide helps you size nits for your site, and our sunlight-readable open frame monitors are built for this use.

Question 10

What is full-glued (fully bonded) tempered glass, and does it matter on a display?

Accepted Answer

The original question is about phone screen protectors, but the same idea, called optical bonding, matters on industrial and outdoor touch screens. Full glue means the adhesive covers the whole viewing area, not just the black edge. In a display, optical bonding fills the gap between the cover glass, the touch sensor and the LCD with an optically clear adhesive, either OCA film or liquid LOCA. Removing the air gap cuts internal reflections, so daylight contrast improves, and it stops condensation and dust forming inside the gap. It also makes the stack stronger against impact and gives a more direct touch feel. The trade-offs are cost and repair, because bonded glass is hard to replace on its own. Ask for bonding on sunlight-readable monitors and on industrial touchscreen monitors used outdoors or in humid areas.

Question 11

What is the difference between a regular TV and a commercial or industrial display for digital signage?

Accepted Answer

A consumer TV is designed for a few hours a day in a living room; a commercial or industrial display is designed to run long hours in a public or harsh place. The practical differences are a duty cycle rated for 16/7 or 24/7 operation, higher brightness for shop windows, a metal housing or open frame that can be mounted in portrait or inside a kiosk, RS-232 or LAN control so a player can switch it on and off, no consumer menus or pop-ups after updates, and longer model availability. TVs are often not specified for portrait mounting or continuous use, and their warranty may exclude commercial use. For kiosks that need touch, look at industrial touchscreen monitors. Our industrial vs commercial monitor comparison and self-service kiosk page go further.

Question 12

How can I prevent screen burn-in on a display that shows a static image?

Accepted Answer

Most signage and industrial touch displays are LCDs, which do not burn in the way OLED does, but they can show image retention, a ghost of a static image, after very long periods of the same high-contrast content, especially when hot. To reduce it, avoid fully static layouts, for example by moving or fading the logo and status bar slightly every few minutes. Run a screensaver or a full-screen refresh during idle times, turn the backlight off overnight if the site allows it, and keep the panel within its temperature range, because heat makes retention worse. A mid-tone background is kinder than pure white. If retention appears, showing a full white or moving pattern for some hours usually clears it. For 24/7 kiosks and locker screens, confirm the duty cycle on the datasheet of any industrial touchscreen monitor you choose.

Question 13

How do I extend the service life of industrial touch screens?

Accepted Answer

Industrial touch screens usually age in predictable ways, so service life is mostly about heat, cleaning and mounting. Keep the unit inside its operating temperature with airflow around the housing, and keep direct sun off screens that are not designed for it, because heat ages the backlight and LCD fastest. Run the backlight at the brightness you need, not at maximum, and use automatic dimming or a screensaver when idle. Clean only with agents the supplier approves, since harsh solvents can attack coatings and gaskets. Protect glass from impact, and on resistive screens use a protective film. Use a stable power supply and proper grounding to avoid controller faults. In the software, spread buttons out so one spot is not pressed all day. Our Reddit answer on panel PC lifespan and range of industrial touchscreen monitors cover more.

Question 14

What is a smart locker, and why are businesses adopting it?

Accepted Answer

A smart locker is a bank of compartments with electronic locks, controlled by software, where people drop off and collect items without staff. Users identify themselves with a PIN, a QR code, an app, an RFID card or a courier login; the system opens the right door, records the event and sends a notification. Businesses adopt them because they cut failed deliveries and staff time, give 24/7 access and leave an audit trail for every parcel, laptop or tool. Reliability depends on the hardware: the locker screen at the head unit, the controller board, the lock driver boards and the network link. Common failure points are offline systems, screens that are hard to read outdoors and stuck locks, rather than the steel cabinet itself. Our smart parcel lockers page covers locker screens and controllers.

Question 15

What are the components of a smart locker system?

Accepted Answer

A typical parcel locker has five hardware layers plus software. The head unit is the user terminal: a locker screen, usually a 10 to 22 inch touch display, with a controller running Android or Linux, plus a QR or barcode scanner and sometimes a camera, card reader or printer. A lock control board drives the electronic locks, commonly over RS-485 or CAN, and reads the door sensors. The locks and compartments form the cabinet. Power covers the supply and often a backup battery so doors can still open during a power cut. Connectivity is Ethernet, Wi-Fi or 4G. The software includes the kiosk app, a cloud management portal and the courier and user apps. See our article on smart parcel locker hardware architecture and the locker screens and controllers we make.

Question 16

What is an important standard for a smart locker?

Accepted Answer

There is no single smart locker standard, so buyers usually combine several. For the electronics, check EMC and electrical safety compliance for your market, for example CE marking in Europe or FCC rules in the US, and RoHS for materials, and ask for the test reports, not just a logo. For outdoor or semi-outdoor lockers, ask for an IP rating that covers the whole head unit and cabinet, the operating temperature range of the screen and controller, and UV-resistant finishes. For accessibility, check reach heights and screen interaction rules in your market, such as the ADA in the US or EN 301 549 for ICT products in Europe. If the locker takes payments or stores ID data, PCI DSS and data-protection rules apply too. Our post on accessible locker screen design and smart parcel lockers page cover the screen side.

Question 17

What are self-service kiosks, and what hardware is inside one?

Accepted Answer

A self-service kiosk is a stand-alone terminal that lets people complete a task without staff: ordering food, checking in at a hotel or clinic, paying a bill, printing a ticket or collecting a parcel. Inside, it is a small computer system: a touch display, often 15 to 32 inches for counter and floor models, a controller or panel PC running Windows, Android or Linux, and the peripherals the task needs, such as a payment terminal, receipt printer, QR or barcode scanner, card reader or camera, all in a steel enclosure. For public use, the hardware has to survive long hours, rough users and frequent cleaning, so commercial or industrial-grade touch screens and fanless controllers are the norm. Our self-service kiosk page lists the screens and boards we supply to kiosk builders, including industrial touchscreen monitors.

Question 18

What drives the cost of setting up an Android kiosk?

Accepted Answer

We cannot give a single price because the range is wide, but we can show what drives it. Hardware: a consumer Android tablet in a stand is the cheapest route, while a commercial-grade Android all-in-one, or an RK3568-class board with an industrial touch screen, costs more but is designed for continuous use and longer availability. Enclosure: a desk stand, a wall mount or a floor-standing steel kiosk changes the bill most. Peripherals: a payment terminal, printer, scanner or camera each add cost and integration work. Software: your app plus device management (MDM) for lock-down, updates and remote monitoring, often charged monthly per device. Then come installation, network and support. Ask suppliers to quote each layer separately so you can compare like with like. Our self-service kiosks page and embedded boards cover the hardware layer.

Question 19

How do I lock down a Windows 10 kiosk that runs a web app full screen in Chrome?

Accepted Answer

Windows has built-in options worth trying before you buy third-party software. Assigned Access can run a single app for a dedicated local account, and on Enterprise or IoT Enterprise editions you can set up a multi-app kiosk or use Shell Launcher to replace the desktop entirely. For a web app in Chrome, use Chrome's kiosk mode (the --kiosk switch) with Chrome Enterprise policies: an allowlist of URLs, no developer tools, no downloads and automatic restart. Add Windows policies to disable Task Manager and USB storage, and set the BIOS to power on after an outage. Lock-down is easier on hardware that boots reliably, so many kiosk builders use a fanless panel PC or a touch monitor with a small fanless PC. See our self-service kiosk page for kiosk hardware.

Question 20

Is a Raspberry Pi a good alternative to a PLC, for example for traffic light control?

Accepted Answer

For a thesis or a lab demo, yes: a Raspberry Pi can run control logic, and tools such as OpenPLC or CODESYS let you program it in IEC 61131-3 languages. For a real traffic light, no. A road signal controller is safety-related: it needs conflict monitoring that prevents green on crossing directions, a hardware watchdog, defined fail-safe states, wide-temperature operation and approval to local traffic-signal standards. A bare Pi has 3.3 V GPIO, SD-card storage and no isolated I/O. A practical middle ground in industry is a PLC for the control and safety logic plus an ARM board or panel PC for the HMI, logging and networking. If you want Linux on industrial-grade hardware, look at embedded industrial motherboards with eMMC storage, isolated serial ports and wide-temperature parts.

Question 21

What is the difference between an SoC and an embedded board?

Accepted Answer

A system on chip (SoC) is a single chip that integrates the CPU cores, GPU, memory controller, video engines, often an NPU, and interfaces such as USB, PCIe, Ethernet and display outputs. Rockchip RK3568, NXP i.MX 8M and TI AM335x are examples. An embedded board is the complete circuit board built around that SoC: it adds RAM, eMMC storage, power management, Ethernet PHYs, serial ports, display connectors and boot firmware, so it can run an operating system. Between the two sit system-on-modules (SoMs), small boards carrying the SoC, RAM and storage that plug into a carrier board you design. For a product, the choice is a ready-made board, a SoM with a custom carrier, or a fully custom design. Our embedded industrial motherboards and RK3568 vs i.MX 8M comparison explain the options.

Question 22

Why are ARM processors used instead of x86 in embedded systems?

Accepted Answer

The main reasons are power, integration and cost. ARM SoCs combine the CPU, GPU, video, display controllers and often an NPU in one chip that typically draws a few watts, so boards can be fanless, small and easy to cool, and can run from 12 V or 24 V supplies. Because ARM licenses its designs, many chip makers build parts for specific markets such as displays, automotive or industrial control, and several publish longevity programmes. x86 still wins where you need Windows desktop software, higher single-thread performance, PCIe expansion or legacy industrial applications. In practice, ARM boards such as the RK3568 are common in locker screens, signage, gateways and simple HMIs, while x86 dominates SCADA stations and Windows-based panel PCs. Compare our ARM embedded industrial motherboards with industrial panel PCs.

Question 23

Which Linux distribution is better for an embedded system?

Accepted Answer

It depends on how much control you need versus how fast you want to start. Debian or Ubuntu on ARM gives you familiar package management and is quickest for prototypes, web HMIs and gateways, but images are large and updates need careful management. Yocto builds a custom distribution with only what you need, reproducible builds and long-term maintenance, at the cost of a steep learning curve; it is common in commercial products. Buildroot is simpler than Yocto and produces small, fast-booting images, but it has no package manager. Android is a strong choice for touch terminals with rich user interfaces. Whatever you choose, ask the board vendor which kernel version and BSP they support, and for how long. Our embedded industrial motherboards are compared in our embedded board comparison.

Question 24

Why is Modbus a favourite among automation protocols?

Accepted Answer

Because it is simple, open and everywhere. Modbus was published by Modicon in 1979 and is free to implement, so almost every PLC, meter, drive, sensor and controller supports it. The data model is just coils and registers, so a technician can read values with a free tool and a register map. It runs over RS-485 as Modbus RTU, which is cheap, works over long distances and tolerates noise, and over Ethernet as Modbus TCP. Its weaknesses are no built-in security, no standard data types or units beyond 16-bit registers, and a polling model that scales poorly. That is why many sites keep Modbus at the device level and use an industrial IoT gateway to convert it to MQTT or OPC UA for the cloud. Our Modbus to MQTT guide shows how.

Question 25

What should an industrial IoT system do when its internet connection goes down?

Accepted Answer

It should keep running and lose nothing. The control loop must never depend on the cloud: PLCs and local controllers keep the machine working, and the local HMI keeps showing data. At the edge, the gateway should buffer data in local storage (store-and-forward) with timestamps from a synchronised clock, then send it in order when the link returns; MQTT persistent sessions with QoS 1 or 2 help here. Alarms that must reach people need a local path, such as a beacon, a siren or SMS over a backup 4G modem. Size the buffer for your longest likely outage, decide what happens when it fills, and watch for a flood of backlog traffic on reconnect. An industrial IoT gateway with local storage and dual WAN covers most of this; see our gateway selection guide.

Question 26

Edge computing vs cloud computing in smart manufacturing: why is edge often preferred?

Accepted Answer

Both process data; the difference is where. Edge computing runs next to the machines, on a gateway, an industrial PC or an edge AI computer, while cloud computing runs in a remote data centre. They share tools such as containers, MQTT, databases and ML models, and usually work together. Edge is preferred on the factory floor for four reasons. Latency: a reject decision or a safety alert cannot wait for a round trip. Bandwidth: sending raw video or high-rate vibration data to the cloud is expensive. Resilience: the line must keep working when the internet does not. Data control: some plants do not allow raw production data or images to leave the site. The cloud is better for fleet-wide dashboards, long-term storage and model training. Our edge vs cloud video analytics comparison covers the camera case.

Question 27

Raspberry Pi, NVIDIA Jetson Nano or Arduino: which is better?

Accepted Answer

They solve different problems. Arduino is a microcontroller board: no operating system, real-time I/O and very low power, ideal for reading sensors and driving actuators. Raspberry Pi is a Linux computer: good for networking, a GUI, light vision work and prototyping, but without a strong AI accelerator unless you add one. NVIDIA Jetson boards add a CUDA GPU for neural network inference, which suits camera-based AI. For a product rather than a project, look beyond the dev kit: storage, temperature range, enclosure, long-term supply and software support. In industrial video analytics, purpose-built edge AI boxes based on NPUs, such as the SOPHGO BM1684 and BM1684X, handle several camera streams in a fanless or ruggedised housing. See what an edge AI box is and our edge AI computers.

Question 28

Which company provides the best industrial monitor?

Accepted Answer

The best choice depends on your application, so a more useful answer is how to compare suppliers than a brand name, and yes, we are a manufacturer too. Start with your requirements: size, brightness, touch type, glove and water use, IP rating, temperature range, mounting and interfaces. Then ask each supplier for the full datasheet, the LCD panel source and its end-of-life plan, test reports for every certification they claim, and a sample you can test on site. Ask how long the model will stay available, how changes are notified, and how the warranty and RMA process work. A factory visit or a video call on the production line shows whether you are talking to a maker or a trader. Our supplier vetting checklist and range of industrial touchscreen monitors are a good starting point.

Question 29

What is the best way to find verified Chinese manufacturers?

Accepted Answer

B2B platforms such as Alibaba, Made-in-China and Global Sources are useful for discovering suppliers, and their verification badges confirm that a company exists and was checked by a third party, but not that it makes your product. To tell a factory from a trading company, check the business licence scope in China's national enterprise credit system, ask for the factory address and visit or video-call the production line, and ask which steps they do in-house; for touch screens, that means lamination, assembly and ageing tests. Ask for test reports that match the exact model, references from customers in your country and a paid sample before any volume order. Use staged payments and arrange a pre-shipment inspection. We are Beijing Huamei Xuntong Technology Co., Ltd. (TouchVision), and our vetting checklist applies to us too.

Question 30

How do I find and approach a manufacturer to design and build a custom tablet or panel PC?

Accepted Answer

Write a one-page requirement brief before you contact anyone: use case, screen size and brightness, touch type, operating system, processor class, interfaces, battery or fixed power, sealing, the certifications your market needs, yearly quantity and timeline. Manufacturers prioritise clear, quantified requests. Then shortlist ODMs that already make similar devices, because modifying an existing platform (housing, I/O, software image, logo) is faster and cheaper than a fully new design. Ask about MOQ, one-off engineering (NRE) and tooling costs, sample lead time, who owns the design files, and how long key components will be available. Protect your design with an NDA, or an NNN agreement when working with Chinese factories. Our custom touch screen display guide walks through the steps, and our industrial panel PCs are a common starting platform.