How To Select Resistive, PCAP or SAW Touch Technologies


Industrial touchscreen technology has advanced to provide many different options.

5-Wire Resistive Touch Screen Technology

5-Wire Resistive Touch Screen Technology represents a revolution in the industry of touch screens. Technology can sometimes be vulnerable to environmental conditions such as liquid spills, humidity, wash down. Users get an increase in reliability and durability, protecting against these hazards, plus longer product life for their touchscreen. 5-Wire Resistive touch screen panels technology leads the pack in contamination-resistant components with drift-free operation capable of more than 35 million finger touches.

Resistive LCD industrial touchscreen technology consists of a glass (or similar material) panel coated with electrically conductive and resistive layers. Each layer is separated by invisible separator dots. Activated LCD touchscreens displays have an electrical current traveling through the screen, casting a net across the monitor face. Any applied pressure from touching pushes the layers together, generating an electrical current change which registers a command.

Reliable touch screen technology resists environmental changes, meaning that no recalibration is necessary for precise functionality. The most practical of touch screen technologies are resistive-type touch screens; their durability has earned them the reputation as the “workhorse of touch screen technologies.” The overwhelming popularity of this type of touch screen technology demonstrates its reliability and durability under a variety of extreme conditions.

Surface Acoustic Wave Touch Screen Technology

SAW Touch Screen Technology uses ultrasonic wave technology over the touch panel. Acoustic waves travel across the panel with a series of transducers and reflectors, creating an invisible grid across the screen. The waves are broken when a finger pushes on the touchscreen. Industrial touchscreen technology detects the particular location, sending the position data to the controller for processing. If the sensor detects a link, an action is launched — like clicking a mouse. SAW Touch Screen Technology panels are the most advanced touch screen technologies available but are susceptible to environmental damage.

Made entirely of glass, there are no layers to wear down, giving SAW the highest durability and clarity available. SAW touchscreen technology is ideal for medical applications, touch displays, kiosks, computer-based training, or other high-traffic indoor environments. Also, this touch screen technology requires the use of a glass layer, making it potentially unavailable for all LCD panels.

Projected Capacitive Touch Screen Technology

A Projected Capacitive Touch has the ability to enable multi-touch that Resistive and SAW touch technologies are unable to achieve. Since this glass has multi-touch capabilities, the touch function works a bit differently. The touch glass is embedded with transparent electrode films with an IC chip that creates a three-dimensional electrostatic field. When a finger touches the screen, the electrical currents change. The computer can then detect the touch points to determine the location touched. Projected Capacitive touch screens are clearer than surface capacitive touch glasses. This type of glass is more scratch resistant than that of Surface Capacitive touch glass and has the multi-touch capability.

Traditional consumer grade PCAP has some downsides, including sensitivity to EMI (Electromagnetic Interference) or RFI (Radio Frequency Interference). Activation can only be done with a bare finger or with thin gloves on. Those shortcomings have been improved on our industrial PCAP touch technology.

Go here to find all touchscreen technology display monitors Caltron provides.

This article was originally posted on by Caltron Industries Inc, revised it to include PCAP technology recently.

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LWT-215O Family of 21” Touch Screen Monitors Caltron Industries

New Series of 21.5in Touchscreens Provide Options for Innovative Applications

The new line of LWT-215O 21.5in touchscreen monitors from Caltron Industries enables application and equipment design engineers to meet the demands of a variety of interface requirements for large-screen applications. Resistive and capacitive touch options have been integrated, offering great flexibility for different use applications.

With the different types of touch technology available, the LWT-215O series is suitable for a wide range of applications, including digital signage, gaming, entertainment, ATMs, kiosks, and the medical industry.

Choices include:

• The LWT-215OR features resistive touch, the most widespread touch technology today. Resistive touch is activated by a finger or an object such as a stylus.

• The LWT-215OC implements projected capacitive touch technology, also known as P-Cap, which is commonly found in smartphones. P-Cap is great for applications where a person may wear gloves. It also allows a user to manipulate an image by using more than one finger at a time.

Selecting the appropriate touchscreen technology depends on how the screen is used, especially for gloved or covered-hand applications. Resistive touch costs less and uses less energy. P-Cap offers clearer screen images and resists scratching, even when used for hours at a time. It also works well on large screens.

Caltron Industries’ team of application engineers assists clients in determining which touch technology is best for their requirements.

Open-Frame Design of Durable LWT-215O Facilitates Fast Retrofits

All Caltron touchscreen monitor solutions feature an enduring open-frame design. An LWT-215O monitor, with its sturdy metal enclosure, can be quickly and easily integrated into an existing system.

Future upgrades will also be simple, since the open-frame design will remain consistent with every new generation of LCD panels that Caltron produces.

Caltron’s upgraded LWT-215O series also utilizes:

• LED backlight technology, for increased energy efficiency. LED backlighting replaces mercury-based CCFL technology, which can also pose a hazard to the environment.

• On-screen display (OSD) management that eliminates human error. Only a service team using required key combinations can open OSD controls.

• Vents in the metal chassis that provide heat dissipation superior to that of a noisy fan that needs maintenance.

Customizable features include a privacy filter and energy-saving zero brightness control. Brightness on the LWT-215OR is 200 nits, or candlelight per square meter, while brightness on the LWT-215OC is 225 nits. Both touchscreen monitors are ideal for indoor or outdoor applications.

Touchscreens of 22 Inches Give Way to the LWT-215O

Over several years, the 21.5-inch LCD panel has replaced 22-inch panels for industrial use because, according to Jim Wang, president of Caltron Industries, “the newer models’ functional application specifications are superior to previous models. Viewing angles are wider and the resolution has improved dramatically for a better user experience.”

For the LWT-215O series, viewing angles have been improved to 178 degrees, left to right and top to bottom. A resolution of 1920×1080 makes the LWT-215O perfect for high-definition applications.

Caltron Industries has the right 21.5 inch touchscreen model for your business application. Call 510-440-1800 today to speak to a sales engineer. You may also email us for more information.

This blog was originally posted on by Caltron Industries Inc.

If you like this blog you may like this article too:

How to select Resistive, Projected Capacitive or Surface Acoustic Wave touch technologies

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LWT-215O, LWT-215OR, LWT-215OC Touch Screen Open Frame Design Monitors Caltron Industries

lwt-215o 22-inch lcd widescreen industrial monitor

LWT-215O, 22″ open frame display monitor

LWT-215O Series Offers Choices in 21.5” Touchscreen Technology

New Interface Options Great for a Variety of Digital Signage, Gaming and Medical Equipment Applications

Caltron Industries has created its new LWT-215O 21.5 touchscreen monitors series for projects needing larger screen applications, but may have differing interface requirements. With three great options for a variety of user interface demands, the LWT-215O series has a solution for nearly all applications.

The LWT-215OR implements mainstream resistive touch technology, common for many standard human interface requirements. The LWT-215OC offers projected capacitive touch technology, or P-Cap, that is commonly found in smart phones. To determine the best screen technology for applications, the development team needs to understand how the screen will be used.

Resistive technology has some advantages in that it costs less, uses less energy and can be activated by any object, finger or stylus. P-Cap implementation costs slightly more but addresses unique user interface and maintenance demands, such as producing clearer screen images, users are able to use more than one finger simultaneously to manipulate an image. P-Cap’s robust surface protects the screen from scratching even after hours of use.

Caltron Industries’ application engineers assist our clients in selecting the best touchscreen technology for your interface needs. The LWT-215O series is particularly suited for digital signage and medical industries as well as aviation simulation. Other applications where this large screen solution is perfect include ATMs, vending machines, gaming, kiosks, news and entertainment.

All of Caltron’s touchscreen monitor solutions feature signature open-frame design, valued by businesses that may update their systems over time. A slim-but-sturdy metal enclosure allow for easy retrofits of new Caltron touchscreen monitors into existing systems. The core mechanical design, which Caltron has kept consistent for more than a decade, is referred to as “drop-in” construction for its ease in implementation.

LWT-215O Replaces Previous 22-inch Touchscreens

According to Jim Wang, president of Caltron Industries, “The 21.5-inch LCD panel has gradually replaced older 22-inch panels for industrial use because the newer models’ functional application specifications are superior to previous models. Viewing angles are wider and the resolution has improved dramatically for a better user experience.”

Viewing angles for the LWT-215O series have been boosted to 178 degrees, left to right and top to bottom. With a resolution of 1920×1080, the LWT-215O is also a true HD panel, ideal for applications that require high definition imagery. The high resolution also provides for easy viewing under a variety of operating conditions, indoors and outdoors.

Additional attributes of the LWT-215O family of touchscreens include:

• The elimination of human error in the on-screen display (OSD) management. OSD controls can be opened only by a service team using required key combinations.

• Heat dissipation through vents in the metal chassis is vastly improved, eliminating the need for a noisy, distracting fan that may require maintenance.

• LED backlight technology replaces traditional mercury-based CCFL technology, increasing energy efficiency during use and eliminating dangerous materials in its manufacturing.

A Caltron Industries sales engineer can help you select the right 21.5 inch touchscreen model for your business application. Call 510-440-1800 today or email us to learn more.

This blog was originally posted on by Caltron Industries Inc.

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How a privacy-filtered industrial touchscreen monitor can protect private information

An industrial touch monitor is invaluable in areas where there may be limited space or where you are in a common area, and the private content on the screen must be protected. As one who works or accesses in an environment where private information is revealed, Caltron has ensured that we have the right products to protect users from incidents where their private information may be compromised.

How to make private information show safely in public applications

Over the last two decades, LCD screens have been greatly improved. Their viewing angles are much better and a departure from the conventional left and right viewing angles. This improvement has made it possible to keep information publicized on a screen invisible to those around. At the same time, LCD displays have also eliminated the worry about information being accessed by other people on a shared monitor.

For that reason, private information exposure on a screen need to be defended. Our first step was bringing in monitors that provide protection. The privacy-filtered industrial touch displays from Caltron provided the practical solution. Privacy filters are polarized sheets of plastic that can be placed between an LCD screen and touch overlay to prevent anyone from seeing what is on the screen unless they are viewing it from straight on.

What kind of applications need privacy industrial touch displays

On industrial touchscreen monitors with privacy filters can be used to protect information like patient information on health care service cart, private information on bank ATMs, personal identity on the immigration passport scanning kiosk, ballot data on the voting machine, and traveler literary on train/air ticket dispenser.

Because in public area, input devices like a mouse, keyboard or any stylus are not allowed, as an input-output Human Machine Interface(HMI) device, touchscreen with privacy feature is the best solution. For example, the laptop carts used in a medical setting is a perfect place to have a privacy-protected industrial touchscreen. Protect not only patient information but also save valuable vehicle spaces.

Caltron can supply the privacy filters on all their open frame touch monitors they have provided. They have a range of displays for different industrial applications in various sizes, brightness levels, aspect ratios, and touch technologies. With nearly 20 years experience, Caltron has proven itself to be the go-to company in this industry. Please contact us via email or call us direct at 510-440-1800.

This blog was originally posted on by Caltron Industries Inc.

Posted in industrial touch screen display monitor

LBT-1904O, HBT-1904O Touch Screen Monitors from Caltron Industries

Caltron’s Line of 19-Inch Monitors Offer Durability, Ease of Installation

With the LBT-1904O and HBT-1904O line, Caltron Industries offers robust 19-inch open frame monitors with improved touch technology that retain a reliably easy-to-install design.

Engineers can count on Caltron’s tried-and-true open-frame design to simplify integration into an existing system. The “drop-in” construction, which has remained unchanged for more than 10 years, facilitates upgrades for years to come and features backward compatibility with older systems.

Caltron’s 19-inch monitors are engineered for use in a variety of settings, including kiosks, ticket dispensers, and vending machines, as well as medical and aviation industries. Models include the LBT-1904OC and HBT-1904OC, which feature advanced P-Cap touch technology.

This version of P-Cap has high noise immunity and is responsive even when the user is wearing gloves, overcoming two functionality challenges that prevented many businesses from using conventional P-Cap.

Other LBT-1904O and HBT-1904O models are equipped with either SAW or resistive single touch technology.

All Caltron 19-inch monitors offer:

Outstanding viewability. With an aspect ratio of 4:3, the expansive 19-inch screen has an aspect ratio of 4:3. HBT, or “high bright” monitors, feature at least 1120 nits, a unit of brightness, which is ideal for outdoor use.

Durability. A tough, 2mm-thick metal panel tray supports and protects the sensitive LCD panel, while quality electronic components ensure lengthy product life.

Energy savings. LCD panels on each model of Caltron’s 19-inch monitor are backlit by LED technology, which reduces energy consumption by as much as 20 percent. Heat is quietly dissipated from the metal chassis via vents instead of energy-consuming fans.

Caltron Monitors, Built for Easy Integration

Caltron monitors are favorites of IT employees and system integrators because installation and adjustments are easily done. For example, on the LCD panel sub-assembly, the distance between the panel surface the front bezel can easily be altered by adjusting just four screws.

Another feature: A lockable OSD that allows only IT or service team employees to work on the unit, ensuring consistent display for all users.

Find out more about Caltron Industries’ improved line of 19-inch monitors. Call 510-440-1800 to speak to an application engineer or email us.

If you like this blog you may like these articles too:

What is an Open Frame Monitor?

What is an Industrial Touch Screen Monitor?

This blog was originally posted on by Caltron Industries Inc.

Posted in 19 inch display monitor, industrial touch screen display monitor, open framer dsiplay monitor

LBT-1904O, HBT-1904O Caltron Industries 19 in Touch Screen Open Frame Design Monitors

Latest 19-Inch Monitors Continues Proud Caltron Tradition of Innovative Touch Screen Solutions

Caltron Industries’ improved line of 19-inch open-frame monitors features major upgrades in projected capacitive, or P-Cap, touch-screen technology.

Newly-introduced versions of the LBT-1904O and the HBT-1904O offer two touch-screen options: Surface Acoustic Wave, or SAW, and resistive single touch. Businesses may choose the touch technology that best suits their requirements.

Caltron’s advanced LBT-1904OC and HBT-1904OC models are outfitted with ground-breaking P-Cap technology that overcomes two critical functionality problems of the past:

lbt-1904oc 19-inch touch screen monitors

19-inch industrial touch screen

• Electrical interference. The high noise immunity of Caltron’s cutting-edge P-Cap eliminates the possibility that “noise” from nearby electronics equipment, or even static electricity, will affect performance. Medical offices and hospitals will benefit from this P-Cap breakthrough.

• Non-responsiveness to gloves. Conventional P-Cap responds to touch via sensors, not pressure, making the technology unsuitable for industries in which the user must wear gloves. Caltron’s 1904OC monitors overcome this challenge and can easily be used in factories or other settings in which gloves are commonly worn.

More About Our 19-Inch Monitors

More about Caltron’s LBT-1904O and the HBT-1904O line of monitors:

• With an aspect ratio of 4:3, the expansive 19-inch screen offers wide angles for viewing and is ideal for use in kiosks, vending machines, ticket dispensers, and medical and aviation applications.

• Caltron’s well-known open-frame design, unchanged since 2005, allows for fast assembly and makes it easy and inexpensive for business owners and managers to upgrade monitors in the future.

• Our HBT, or “high bright” monitors, feature at least 1120 nits, a unit of brightness, for greater clarity under outdoor conditions.

• Video graphics array inputs are standard, but analog audio, DVI, S-Video BNC and composite video input options are also available.

• Cooling by vents instead of fans keeps operation quiet.

• Sturdy construction stands up to continual, 24-hour use.

Learn how Caltron Industries’ diverse line of 19-inch touchscreen monitors can provide a unique product to improve the user interface and productivity in a variety of solutions. Call 510-440-1800 to speak to a Caltron application engineer, or email us.
If you like this blog you may like these articles too:

Caltron’s Innovative LBT 1212OC Touch Screen Monitor

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This blog was originally posted on by Caltron Industries Inc.

Posted in industrial touch screen display monitor | Tagged , , , ,

Easy to Integrate 10″ Touchscreen Monitor | Commercial Touchscreen Monitors

Caltron’s LWT-101O: Easy to Integrate

10 Inch Touchscreen Monitors Designed with the customer in Mind

The LWT-101O 10” touchscreen monitor’s installation is so easy, it’s hard to believe it can perform so many tasks so well.

Caltron Industries, a leader in the development of lightweight, wide-screen monitors over the past 20 years, has designed the LWT-101O for the convenience of equipment engineers facing both budget and time constraints.


LWT-101O series video introduction

Your design staff can appreciate the straightforward open-frame design, consisting of a strong metal housing with no enclosure, making the monitor “drop-in ready” for integration into medical, pharmaceutical and vending machine applications. A hefty 2-millimeter metal tray provides durable support for the LCD panel, even with around-the-clock use.

Because Caltron’s open-frame concept does not change from one generation to the next, the future addition of any model from the LWT-101O series of 10 inch touch monitors always involves the same simple process.

The LWT-101O also features a choice of resistive touch or five-point projected capacitive touch technologies, both supported by Linux, Mac, and Windows. P-Cap, growing in popularity, offers high noise immunity and works well even when its industrial or medical end users are wearing gloves.

The touchscreen monitor’s LED backlighting reduces energy usage by as much as 20 percent and offers superior screen resolution. Unlike CCFL backlights, LED technology is also environmentally safe because it employs no harmful mercury.

The LWT-101O comes equipped with standard video graphic array and HDMI inputs, but also can be customized with additional inputs, including analog audio inputs.

With outstanding brightness and resolution, a widescreen aspect ratio of 16:10 and screen viewing angles of 160 degrees both left to right and top to bottom, the LWT-101O was built for both indoor and outdoor applications. The LCD panel can be quickly modified for optimal viewing by adjusting four screws on the LCD panel’s sub-assembly.

Call 510-440-1800 or email Caltron today to find out how the versatile LWT-101O 10” touchscreen monitor can benefit your next product interface design.

If you like this blog you may like these articles too:

What is an Open Frame Monitor?

What is an Industrial Touch Screen Monitor?

This blog was originally posted on by Caltron Industries Inc.

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