Displays Digits Digital Bargraphs
Description
Digital bargraphs are display devices used to measure and present process and electrical variables such as pressure, flow, temperature, speed, current, and voltage. They utilize either light emitting diode (LED) or liquid crystal display (LCD) technology to visually represent data through vertical or horizontal segments, indicating the degree of information displayed.
Working Principle
Digital bargraphs operate by using rows of tiny light bulbs in LED bargraphs, which are illuminated by the movement of electrons in a semiconductor material. This illumination creates a visual representation of data, with segments lighting up to indicate specific values. Some digital bargraphs position the zero point at the end of the bargraph, while others place it in the middle, allowing for the display of negative values on the left and positive values on the right. This functionality makes them useful for providing a clear and immediate visual representation of data, which is crucial for monitoring and control in various applications.
Applications
Digital bargraphs are used in a wide range of applications due to their ability to measure and display various process and electrical variables. Specific examples include monitoring pressure levels in industrial processes, displaying temperature readings in HVAC systems, and indicating current and voltage levels in electrical panels. They are also employed in speed monitoring systems and flow measurement devices, providing real-time data visualization for operators.
Advantages over other Digital Bargraphs
Digital bargraphs offer several advantages over other types of digital displays. For instance, LED bargraphs provide high brightness and visibility, even in outdoor or harsh environments, due to their use of high-intensity LEDs. They also offer a wide range of color options, including the ability to create up to 1.7 million colors by combining red, green, and blue LEDs. This versatility allows for enhanced data visualization and differentiation between different data sets or thresholds.
Limitations
One limitation of digital bargraphs is the requirement for panel modifications or custom-built panels to accommodate their size and configuration, especially in retrofit situations. Additionally, while they provide a clear visual representation of data, they may not offer the same level of detail or precision as other digital display types, such as numeric or alphanumeric displays.
Considerations
When selecting digital bargraphs, several factors should be considered. Initial costs can vary depending on the complexity and features of the device, such as the number of segments and input/output options. Operating expenses are generally low due to the energy efficiency of LED technology. Durability is a key advantage, as LEDs have long operating lifetimes and are less prone to deterioration compared to incandescent bulbs. Accuracy is typically expressed as a percentage and should be evaluated based on the specific application requirements. Replacement and maintenance costs are minimal, given the robust nature of LED technology and the lack of moving parts. However, it is important to ensure that the chosen bargraph meets the necessary performance specifications and environmental conditions for the intended application.
from EarthLCD, a division of Earth Computer Technologies, Inc.
Specifications. Full ezLCD Command Set. 10.4" 640x480, 18 bit Color TFT LCD, capable of 242,144 simultaneous colors. 400 Nits. Integrated Resistive Touch Screen. Embedded LCD Controller. Full Speed USB 2.0 Interface 480Mbits/s (via USB connector). Serial (true-RS232), I2c Interface, and SPI. [See More]
- Features: Adjustable Display; Displays Digits
- Display Colors: Multi
- Display Technology: LCD
- Bargraph Orientation: Vertical (optional feature); Horizontal (optional feature)
from Hoyt Electrical Instrument Works, Inc.
The Tiger 320 Series of 32-bit Programmable Meter Controllers incorporates, in one instrument, all the different functions required by today's automation and process control applications. Plug-in hardware options provide the specific functions you actually require for each job. Input signal... [See More]
- Features: Adjustable Display; Alarms; Displays Digits; Set Points; Conditioning; Totalizer
- Display Colors: Green (optional feature); Red; Multi (optional feature)
- Display Technology: LED
- Bargraph: Center Zero; End Scale Zero
from OTEK Corporation
Programmable Intelligent Controllers with bargraph digital LED or LCD display. [See More]
- Features: Alarms; Displays Digits; Conditioning
- Display Colors: Green
- Display Technology: LCD
- Bargraph: End Scale Zero
from EarthLCD, a division of Earth Computer Technologies, Inc.
PM-ezLCD-101 Specifications: Full ezLCD Command Set. 10.4" 640x480, 18 bit Color TFT LCD, capable of 242,144 simultaneous colors. 400 Nits. Integrated Resistive Touch Screen. Embedded LCD Controller. Full Speed USB 2.0 Interface 480Mbits/s (via USB connector). Serial (true-RS232), I2c Interface, and... [See More]
- Features: Adjustable Display; Displays Digits
- Display Colors: Multi
- Display Technology: LCD
- Bargraph Orientation: Vertical (optional feature); Horizontal (optional feature)
from OTEK Corporation
Programmable Intelligent Controllers with bargraph digital LED or LCD display. [See More]
- Features: Displays Digits; Conditioning
- Display Colors: Blue
- Display Technology: LCD
- Bargraph: End Scale Zero
from EarthLCD, a division of Earth Computer Technologies, Inc.
Specifications. Full ezLCD Command Set. 3.5" 320x240, 24 bit Color TFT LCD. 350 Nits. Integrated Resistive Touch Screen. Embedded LCD Controller. Full Speed USB 2.0 Interface 480Mbits/s (via USB connector). RS232 TTL, and SPI. Integrated MicroSD/MMC (Secure Digital/MultiMedia) Memory Slot!. High... [See More]
- Features: Adjustable Display; Displays Digits
- Display Colors: Multi
- Display Technology: LCD
- Bargraph Orientation: Vertical (optional feature); Horizontal (optional feature)
from OTEK Corporation
The Innovator & Leader on Automatic Tricolor Bargraphs,now offers you the latest technology for replacement andnew applications. The New LBD Series uses a highly integratedASIC/DSP and Nanowatt microcontroller alongwith a proven software package approved and used bythe Military & Nuclear Industries... [See More]
- Features: Alarms; Displays Digits; Intrinsically safe (optional feature); Conditioning (optional feature)
- Display Colors: Green
- Display Technology: LCD
- Bargraph: Center Zero
from EarthLCD, a division of Earth Computer Technologies, Inc.
Specifications. Full ezLCD Command Set. 6.4" 640x480, 18 bit Color TFT LCD, capable of 242,144 simultaneous colors. 250 Nits. Integrated Resistive Touch Screen. Embedded LCD Controller. Full Speed USB 2.0 Interface 480Mbits/s (via USB connector). Serial (true-RS232), I2c Interface, and SPI. [See More]
- Features: Adjustable Display; Displays Digits
- Display Colors: Multi
- Display Technology: LCD
- Bargraph Orientation: Vertical (optional feature); Horizontal (optional feature)
from OTEK Corporation
In 1975 OTEK introduced the World's First Loop Powered DPM. In 1979, The First Loop Powered Bargraph. In1996 the Automatic Tri-Color Bargraph and in 2004 the World's First Loop Powered Serial I/O DPM. Now OTEKbrings you the World's First Loop Powered Switchboard Style Bargraph to complement its New... [See More]
- Features: Alarms; Displays Digits; Intrinsically safe (optional feature)
- Display Colors: Green (optional feature); Red (optional feature)
- Display Technology: LCD
- Bargraph: Center Zero
from EarthLCD, a division of Earth Computer Technologies, Inc.
7" TFT 800x480. 18 bit Color TFT LCD(262,144colors). 300 Nits LED Backlight. Integrated Resistive Touch Screen. Dedicated LCD Controller Chip. USB,SPI,RS232 Interface. 3.8 MB +SD to 2G Memory. LUA Scripting Language Capable [See More]
- Features: Adjustable Display; Displays Digits
- Display Colors: Multi
- Display Technology: LCD
- Bargraph Orientation: Vertical (optional feature); Horizontal (optional feature)
from EarthLCD, a division of Earth Computer Technologies, Inc.
Specifications. Full ezLCD Command Set. 8" 800x600, 18 bit Color TFT LCD, capable of 242,144 simultaneous colors. 220 Nits. Integrated Resistive Touch Screen. Embedded LCD Controller. Full Speed USB 2.0 Interface 480Mbits/s (via USB connector). Serial (true-RS232), I2c Interface, and SPI. Integrated... [See More]
- Features: Adjustable Display; Displays Digits
- Display Colors: Multi
- Display Technology: LCD
- Bargraph Orientation: Vertical (optional feature); Horizontal (optional feature)
from EarthLCD, a division of Earth Computer Technologies, Inc.
ezLCD-001 is an intelligent LCD Module that comes mounted as a complete assembly including Sony 2.7" Color TFT LCD and a built-in Earth LCD Controller card and integrated USB and serial interfaces. Earth's ezLCD-001 meets the needs of OEMs, industrial manufacturers, and hobbyists that require small... [See More]
- Features: Adjustable Display; Displays Digits
- Display Colors: Multi
- Display Technology: LCD
- Bargraph Orientation: Vertical (optional feature); Horizontal (optional feature)
from EarthLCD, a division of Earth Computer Technologies, Inc.
Intelligent Programmable LCD Module with Touch Screen. FEATURES: Integrated Touch Screen (resistive). Programmable Display Module. Serial+USB+Parallel Interface. I2C/AVR/BASIC Stamp/VB Compatible. 64Kb Flash ROM (available for fonts & bitmaps). 1 Megabyte Flash ROM (use to be determined). [See More]
- Features: Adjustable Display; Displays Digits
- Display Colors: Multi
- Display Technology: LCD
- Bargraph Orientation: Vertical (optional feature); Horizontal (optional feature)
from EarthLCD, a division of Earth Computer Technologies, Inc.
Specifications. Full ezLCD Command Set. 5.6" 320X240, 16 bit Color TFT LCD, capable of 65,536 simultaneous colors. 300 cd/2m (nits). Integrated Resistive Touch Screen. Dedicated LCD Controller Chip. Full Speed USB Interface (via Mini-USB connector). Serial (RS232). Integrated SD/MMC (Secure... [See More]
- Features: Adjustable Display; Displays Digits
- Display Colors: Multi
- Display Technology: LCD
- Bargraph Orientation: Vertical (optional feature); Horizontal (optional feature)