Displays Bargraph Digital Panel Meters
Last Updated: April 1, 2025
Description
Displays Bargraph Digital Panel Meters are 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. These segments indicate the degree of information displayed, with some models positioning the zero point at the end or in the middle of the bargraph to show negative and positive values.
Working Principle
Digital bargraph meters work by converting electrical signals into a visual display. They use digital-to-analog converters (DACs) to transform digital codes into voltage levels, which are then processed to produce the required output signal characteristics. The visual representation is achieved through illuminated segments that change based on the input signal. This allows for quick and easy interpretation of data, making them useful for monitoring and controlling various industrial processes. The combination of digital and analog displays provides a comprehensive view of the measured parameters, enhancing the user's ability to make informed decisions.
Applications
Digital bargraph meters are used in a wide range of applications. For example, they are employed in industrial settings to monitor electrical parameters such as AC and DC voltage and current. They are also used in process industries to measure variables like temperature and pressure. Specific examples include their use in power plants for monitoring electrical outputs and in manufacturing facilities for ensuring process parameters remain within specified limits.
Advantages over other Process - Industrial Heaters
Digital bargraph meters offer several advantages over traditional process and industrial heaters. They provide a more precise and immediate visual representation of data, which can be critical for real-time monitoring and control. The ability to display both digital and analog information simultaneously allows for a more comprehensive understanding of the process conditions. Additionally, their capability to integrate with plant networks and provide data logging functions enhances their utility in complex industrial environments.
Limitations
One limitation of digital bargraph meters is the potential need for panel modifications in retrofit situations, as early models were not always compatible with existing panel sizes. This can lead to additional costs and complexity when integrating these meters into older systems. Furthermore, while they offer high accuracy, the resolution and display capabilities may not be sufficient for all high-end applications, which might require more advanced models with higher resolution.
Considerations
When selecting digital bargraph meters, several factors should be considered. Initial costs can vary depending on the complexity and features of the meter. Operating expenses are generally low, but durability and maintenance costs should be evaluated, especially in harsh environments where rugged versions may be necessary. Accuracy is a critical factor, with typical accuracy being 0.1% for DC readings and 0.5% for AC readings. Replacement and maintenance costs should also be considered, particularly in applications where high reliability and minimal downtime are essential.
from ABB Measurement & Analytics
With an easy-to-read, wide-screen LCD display, the JDF200 Field Indicator provides flexible configuration capabilities. The intuitive and user-friendly “Easy setup ” menu allows the operators in the field to interact with the device without training and all needed parameters can be set... [See More]
- Features: Displays Bargraph; Intrinsically safe
- Character Size: Less Than 0.37 (9.4mm)
- Display Type: Alphanumeric
- Number Digits: 24.0
from Transducer Techniques, LLC
The SSI is a ultra-fast 15,360 samples/second Plug & Play Smart TEDS IEEE 1451.4 compliant portable handheld Load Cell Indicator. Just plug in a TEDS compatible Load Cell or Torque Sensor and the SSI will automatically self-calibrate. When used with a non-TEDS Load Cell or Torque Sensor, the SSI can... [See More]
- Features: Alarms; Displays Bargraph; Conditioning
- Number Digits: 6.0
- Display Type: Numeric; Combination
- Display Technology: LCD
from BinMaster, Inc.
The DPM-400 loop-powered digital panel meter allows you to install a local display right where you need it. No power, no problem. This digital panel meter is powered by an existing 4-20 mA loop, making it an ideal display solution for any of your 4-20 mA sensors. It features a dual-line display with... [See More]
- Features: Adjustable Display; Alarms; Displays Bargraph
- Character Size: 0.37 (9.4mm) to 0.56 (14.2mm); Larger than 0.56 (14.2mm)
- Display Type: Combination
- Number Digits: 13.0
from OTEK Corporation
The DIN-BAR was specifically designed to replace (form & fit)the old electromechanical bargraphs, with21st Century Technology exclusive toOTEK, the originator of the Automatic TricolorBargraph P.I.C. (Programmable IntelligentControllers). The only similarity isthe panel cut out, mounting and bezel. [See More]
- Features: Displays Bargraph; Conditioning
- Number Digits: 4.0
- Display Type: Combination
- Display Technology: LED
from Sifam Tinsley UK
Features. • Universal input for the measurement of d.c. current, d.c. voltage and temperature. • 3 or 7-colour bargraph. • Programming of bargraph colour depending on the measured quantity value. • Signalling of set alarm value over flow. • Storage of measured signal in... [See More]
- Features: Displays Bargraph
- Number Digits: 4.0
- Display Type: Numeric
- Display Technology: LED
from Define Instruments
What it does: Accepts either 4-20mA or 0-10V input signal. Data is shown on 0-100% incremental display. Also offers optional relay and analog output for alarming and control, plus serial communications. This controller is ideal for a variety of applications where instant, visual indication of the... [See More]
- Features: Displays Bargraph
- Character Size: Less Than 0.37 (9.4mm)
- Display Type: Numeric
- Number Digits: 5.0
from Hoyt Electrical Instrument Works, Inc.
Liquid Crystal Display. Single row, 4 digit. Analog style bargraph indication. True RMS measurement. CT programable up to 5000A. 3 phase 4 wire electrical connection. IP protection (Front Plate): IP65 [See More]
- Features: Displays Bargraph
- Number Digits: 4.0
- Display Type: Alphanumeric
- Display Technology: LCD
from Dynisco
Features and Benefits. Graphical/text LCD Display with color change LED backlight on alarm (red/green). Graphical trend view of process, alarms & events as standard. Easy to use Setup Wizard. Display of differential pressure is available. USB port option for access to configuration and log... [See More]
- Features: Adjustable Display; Alarms; Displays Bargraph; OnOff; Set Points
- Display Technology: LCD
- Display Type: Combination
- Analog Input Channels: 1
from OTEK Corporation
The HI-Q214 (1.4"W x 11.3"H x 3"D) is virtually the same as our popular HI-Q114, but at a lower cost and with a housing that is only 3" deep! The unit was specifically designed to replace (form & fit) the old electrome-chanical bargraphs like the Chessel 700 series. This unit is OTEK's largest... [See More]
- Features: Displays Bargraph; Conditioning
- Number Digits: 4.0
- Display Type: Combination
- Display Technology: LED
from Sifam Tinsley UK
Features. • 3 or 7- colour bargraph with programmable colour switching over. • Recording of 750 measuring segments , released temporary. • Universal input. • Programmable indication characteristic and bargraph magnifier. • Up to 8 programmable alarm outputs. •... [See More]
- Features: Displays Bargraph
- Number Digits: 4.0
- Display Type: Numeric
- Display Technology: LED
from Hoyt Electrical Instrument Works, Inc.
Liquid Crystal Display. Single row, 4 digit. Analog style bargraph indication. True RMS measurement. CT programable up to 5000A. 3 phase 4 wire electrical connection. IP protection (Front Plate): IP65 [See More]
- Features: Displays Bargraph
- Number Digits: 4.0
- Display Type: Alphanumeric
- Display Technology: LCD
from OTEK Corporation
Programmable Intelligent Controllers with bargraph digital LED or LCD display. [See More]
- Features: Alarms; Displays Bargraph; Set Points (optional feature); Conditioning (optional feature)
- Character Size: Larger than 0.56 (14.2mm)
- Display Type: Combination
- Number Digits: 6.0
from Sifam Tinsley UK
Features. • 2 independend measuring channels with an universal input. • 3 or 7-colour bargraph with programmable colour switching over. • Recording of 750 measuring segments, released temporary. • Programmable indication characteristic and bargraph magnifier. • Up to 8... [See More]
- Features: Displays Bargraph
- Number Digits: 8.0
- Display Type: Numeric
- Display Technology: LED
from Hoyt Electrical Instrument Works, Inc.
The MultiPanel is a low cost 3 phase digital meter in a standard DIN 96 x 96 mm case, measuring the basic electrical parameters. The standard unit can be used on any wiring system and any voltage between 10V to 415V LN (17V to 720V LL) The MultiPanel is simple to use and is an ideal replacement for... [See More]
- Features: Adjustable Display; Displays Bargraph
- Character Size: 0.37 (9.4mm) to 0.56 (14.2mm)
- Display Type: Numeric
- Number Digits: 12.0