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Bargraph and Ribbon displays

Bargraph and Ribbon displays are ideal for showing relative amounts, such as level, temperature, weight, pressure etc. They give a quick idea of how hot, heavy, full etc something is.

4-20mA, 0-10V process input bargraph displays

Display almost any physical variable...
The bargraph displays on this page accept most common process signals such as 4-20mA, 0-10V, 1-5V etc. All can be scaled to read in your preferred engineering units.

Most have a 24V excitation output voltage which you can use to power a 2 wire or 3 wire input loop.

Suited for these applications and more:-

Level measurement - use a depth or level sensor
Pressure measurement - use a pressure transmitter sensor
Tank contents display - use a level sensor
Temperature measurement - use a temperature transmitter
Humidity measurement - use a humidity transmitter
Any physical variable having a 4-20mA or 0-10V signal

[Tri-Colour bargraphs] [BAR-A] [BAR-X] [PRO-BAR]

Stop Press: March 2017

BE101P BE051P DROP-IN Replacement

We now have Exact, FORM, FIT and FUNCTIONAL new-manufacture replacement units for OBSOLETED BE101 and BE051 Bargraphs. IDENTICAL inputs, display, control and communication.

For details, please call and we will pass your request to our authorised distributor.

Model BAR-A and BAR-X
The BAR-X and BAR-A are user friendly programmable process bargraph displays. The BAR-A is for display only, the BAR-X includes 2 alarm relays. They can mount either vertically or horizontally and are unique in their ease of setup - programmable, but without menus! A fully customisable scale sheet fits behind the protective front window, to allow you to read off the value in your own engineering units.
Input connections	Current input, Voltage input, Excitation Suits direct connection, 2 wire active or passive loop and 3 wire transmitter systems.
Input Signals	Current input terminal accepts:- 0-10mA, 0-20mA, 4-20mA 33 Ohm input resistance Voltage input terminal accepts:- 0-5V, 1-5V, 0-10V 1 Megohm input resistance.
Excitation	24V DC up to 100mA (5V, 10V and 12V optional)
Display	75mm long bargraph with 30 segments. You can select either moving dot or progressive bargraph formats.
Digit colour	Red or green.
Scaling	Digital menu-free system.
Filtering	Adjustable FAST or SLOW response
Front panel controls	Calibration, Alarms.
Power	11-30VDC or 95-265 VAC
Accuracy	+/-3% of range
Thermal stability - range	+/- 100ppm/^oC
Thermal stability - offset	+/- 100ppm/^oC
Analogue output	Not available on this model
Alarm output	2 Alarms rated 5A 250VAC SPDT Available on the BAR-X only. Pump-control action included as standard.
Serial data output	Not available on this model
Bezel size	96mm wide x 48mm high. 13mm forward.
Panel cutout	92mm wide x 45mm high. +1mm, -0mm
Depth behind panel	125mm including connectors + cable.
Sealing	IP54 standard, IP67 with optional SPC4 cover
See operating Manual
See datasheet

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Tri-Colour and 7-Colour Bargraphs

	Model LEL-NA5	Model LEL-NA6
Numeric display	Scalable 4 digit display -1999 to +9999 Choose red, green, yellow or blue	Scalable 4 digit display -1999 to +9999 Choose red, green, yellow or blue
Bargraph	55 segments in 3 colours 29 segments in 7 colour	48 segments in 3 colours 29 segments in 7 colour
Size	48x144mm 100mm deep	48x144mm 100mm deep
Inputs	Single Channel RTD PT100, PT500, PT1000 TC types J,K,N,E,R,S,T Resistance 0-400 or 0-4000 Ohm Voltage 0-60mV, 0-3V, 0-10V, 0-200V, 0-600V Current 0-5mA, 0-20mA, 0-2A, 0-5A	Dual Channel RTD PT100, PT500, PT1000 TC types J,K,N,E,R,S,T Resistance 0-400 or 0-4000 Ohm Voltage 0-60mV, 0-3V, 0-10V, 0-200V, 0-600V Current 0-5mA, 0-20mA, 0-2A, 0-5A
Output options	4-20mA or 0-10V 0 or 4 relays 0 or 8 open collector NPN RS485 Modbus	4-20mA or 0-10V 0 or 4 relays 0 or 8 open collector NPN RS485 Modbus
Power	95-253VAC or 20-40VDC	95-253VAC or 20-40VDC

connections for tri-colour and 7 colour bargraphs

Datasheet
Manual for NA3
Manual for NA5
Manual for NA6
Programming software app for NA series
RS485 to USB converter

[^] PRO-BAR large bargraph display
The PRO-BAR is a large display-only format process bargraph display with 250mm scale length. They can mount either vertically or horizontally. A fully customisable scale sheet fits behind the protective front window, to allow you to read off the value in your own engineering units.
Input connections	Current input, Voltage input, Excitation Suits direct connection, 2 wire active or passive loop and 3 wire transmitter systems.
Input Signals	Current input terminal accepts:- 0-10mA, 0-20mA, 4-20mA 33 Ohm input resistance Voltage input terminal accepts:- 0-5V, 1-5V, 0-10V 1 Megohm input resistance.
Excitation	24V DC up to 100mA (5V, 10V and 12V optional)
Display	250mm long bargraph with 50 segments.
Digit colour	Red or green.
Scaling	Zero and Span potentiometers
Power	95-265V AC / 11-30V DC
Accuracy	+/-0.5% of range
Thermal stability - range	+/- 100ppm/^oC
Thermal stability - offset	+/- 100ppm/^oC
Analogue output	Not available on this model
Bezel size (wall mtg)	95mm wide x 310mm high
Bezel size (panel mtg)	111mm wide x 326mm high
Panel cutout (if you plan to panel mount the bargraph)	96mm wide x 311mm high. +1mm, -0mm
Depth	110mm including cable.
Sealing	IP65 all round
Operating manual
Data Sheet

Custom special bargraphs.
We can make customised versions of our bargraphs to suit your exact needs. Just tell us what you want and we will be pleased to quote.

1 metre tall bargraph

Using an INT4-P to drive a Titan message display as a bargraph...
Large format bargraph display

Calculating liquid content in a cylinder at different depths to help scale your bargraph

volume calculation for horizontal or vertical cyclinders

If you want to build your own application, perhaps on a PLC or computer, you can use this formula to find how much liquid is in a horizontal cylinder with flat ends.

If you use inches for your measurements, the result will be cubic inches.
If you use centimeters for your measurements, the result will be cubic centimetres.

Formula to calculate the volume in a horizontal tank

this is the relationship between percentage depth and percentage volume

Other useful related formulas...

formula for volume calculation for horizontal or vertical cyclinders

Tank contents measurement is one of the most common measurements in industrial processes.

Yet, it can prove difficult to measure volume accurately, especially if your storage tank has irregular or curved sides.

We'd like to offer you a few simple, reliable solutions.

Low cost methods...

1. Direct Calibration
This is the simplest and most reliable method, as it automatically takes into account any curvature of your tank, offset in the pressure sensor, SG of liquid etc.

Connect your pressure sensor to the INT2-P meter and start with an empty tank.

Set the meter for direct calibration and use the linerarisng function (see manual for details)

Set the 1st cal point so that the display reads 0.

We now want to pump into the tank known volumes of liquid, and we will set the meter to read the tank volume at each point.

Ideally, aim to fill the tank to the brim, and do so by filling to 10 evenly spaced volumes.

2. Theoretical Calibration
What if you can't start from an empty tank and it will be difficult to pump in known volumes up to the capacity of the tank?

You can calibrate using the theoretical method, but you will need to know the relationship between volume, (going in 10 steps from 0% to 100% of tank volume) and your sensor signal in mA for each volume.

You will need to know the volume in the tank at different depths.

This method is only suitable if you know the mathematical relationship between your pressure sensor signal and volume in the tank.

You should write a table of signal vs. volume. The more points you include, the greater will be your overall measurement accuracy.

Let's assume you use a pressure sensor with 4-20mA output. You may get a table something like this ...

SIGNAL	VOLUME
4mA	0 gallons
5mA	50 gallons
6.44mA	100 gallons
8.2mA	150 gallons
10.3mA	200 gallons
12.7mA	250 gallons
14.5mA	300 gallons
17.07mA	350 gallons
19.4mA	400 gallons