Cylinder

The Cylinder display type visualizes the fill ratio of a value relative to capacity through a three-dimensional or semi-three-dimensional cylindrical volume. It is particularly suitable for monitoring level and quantity. In SCADA and industrial monitoring systems, it is useful for quickly evaluating the condition of tanks, storage units, silos, and reservoirs.

Fill-Level Logic

72 %

The fill level inside the cylinder rises or falls according to the value within the defined min–max range. This provides the operator with a direct visual answer to the question “How full is it?”

WATER RESERVOIR MAX 72 % MIN 72 % Fill level

What Types of Data Is It Suitable For?

  • Liquid, gas, or solid level measurements
  • Capacity utilization ratios
  • Storage and tank fill levels

Examples

  • Fuel tank level (%)
  • Water storage level (m / %)
  • Chemical tank level
  • Ash / coal silo fill level

Basic Components

  • Cylinder Body: Provides the visual impression of a physical tank through a 3D or semi-3D appearance.
  • Fill Level: Moves upward or downward according to the value; it may be static or animated.
  • Scale: Represents minimum and maximum values as percentages or actual engineering units.
  • Color Zones: Distinguish normal, low, and critical levels through different visual states.

Use in SCADA and Energy Systems

  • Power Generation Facilities: Fuel oil tank level, cooling water reservoir, chemical dosing tanks
  • Thermal & Gas Power Plants: LNG / natural gas tanks, boiler feedwater tanks, ash and waste silos
  • Distribution & Infrastructure: Water treatment facilities, compressed-air tanks

LinearGauge

LinearGauge is a simple yet highly effective visualization tool that displays the position of a value within a defined min–max range along a linear axis. It is particularly suitable for threshold monitoring, capacity utilization, and performance monitoring.

Current Position Within the Range

78 %

The indicator can use a horizontal or vertical axis with a fill bar, marker, or pointer. In principle, it works similarly to a load bar or digital thermometer.

TRANSFORMER LOAD RATIO 0 % 50 % 100 % 78 %

What Types of Data Is It Suitable For?

  • Continuously changing measurements
  • Values with clearly defined min–max ranges
  • Threshold and limit monitoring

Examples

  • Busbar loading ratio (%)
  • Boiler pressure (bar)
  • Line current (A)
  • CPU / system load (%)

Basic Components

  • Scale: Minimum–maximum value and actual unit or percentage.
  • Indicator Element: Fill bar or marker / pointer.
  • Threshold Zones: Normal, warning, and critical areas can be displayed as bands or segments.
  • Current Value Label: A numerical reading can be added when required.

Use in SCADA and Energy Systems

  • Power Generation Facilities: Turbine load ratio, generator output power, efficiency KPIs
  • Switchyards & Distribution: Transformer loading ratio, line current limit monitoring
  • Thermal & Gas Power Plants: Boiler pressure, steam temperature, fuel flow

AngularGauge

AngularGauge is a gauge in which a value is displayed along a circular or semi-circular angular scale, typically using a needle or arc. Visually resembling analog instruments such as a speedometer or pressure gauge, it makes instantaneous status, threshold, and limit monitoring easier.

“Where Are We Now?” Indicator

74 MW

The needle or arc directly indicates the position of the value within the min–max range. This allows the operator to evaluate both the numerical value and its position within the operating range at a glance.

MIN MAX 74 MW Generator power

What Types of Data Is It Suitable For?

  • Instantaneous measurements
  • Rapidly changing process values
  • Limit and alarm monitoring

Examples

  • Turbine load (%)
  • Generator power (MW)
  • Pressure (bar)
  • Frequency (Hz)

Basic Components

  • Angular Scale: 180°, 240°, 270°, or 360° ranges with min–max values.
  • Indicator Element: Needle or arc gauge.
  • Threshold Zones: Normal, warning, and critical areas can be separated using colored arc segments.
  • Center Value / Label: Current numerical value and unit information.

Use in SCADA and Energy Systems

  • Power Generation Facilities: Turbine instantaneous load ratio, generator output power, frequency monitoring (50 Hz)
  • Switchyards & Distribution: Busbar voltage, line current
  • Thermal & Gas Power Plants: Boiler pressure, steam temperature, fuel flow

HalfAngular

HalfAngular can be considered the 180° semi-circular version of AngularGauge. It preserves the feel of an analog measuring instrument while requiring less space and allowing more compact use in dashboard layouts.

Compact Angular Display

86 %

It typically uses a needle or arc on a 180° scale increasing from left to right. This structure is advantageous in applications where screen space is limited but instantaneous status and limit information must be read quickly.

What Types of Data Is It Suitable For?

  • Instantaneous process values
  • Frequently monitored metrics with limited screen space
  • Threshold and alarm monitoring

Examples

  • Turbine load (%)
  • Generator power (MW)
  • Boiler pressure (bar)
  • Grid frequency (Hz)

Basic Components

  • Semi-Circular Scale: Typically increasing values from left to right with min–max markers.
  • Indicator Element: Needle or arc fill.
  • Threshold Zones: Normal, warning, and critical levels can be separated into segments.
  • Numerical Value: Current value and unit displayed in or below the gauge.

Use in SCADA and Energy Systems

  • Power Generation Facilities: Turbine load ratio, generator instantaneous power
  • Switchyards & Distribution: Busbar voltage, line current
  • Thermal & Gas Power Plants: Boiler pressure, steam temperature

Bulb

The Bulb (LED/Lamp) display type is a simple yet effective status indicator used to show the condition of a system or piece of equipment quickly and intuitively. In SCADA, DCS, and industrial dashboards, it is particularly useful for presenting binary or multi-state information such as running / stopped / alarm.

Instant Status Recognition

RUN

The Bulb indicator answers the question “Is it running?” rather than “How much?”. The LED / lamp symbol can be displayed as filled, illuminated, dimmed, or flashing in an alarm condition.

RUN Cooling pump Boolean / State / Alarm status

What Types of Data Is It Suitable For?

  • Boolean (0 / 1) data
  • Status codes (enum / state)
  • Alarm and interlock states

Examples

  • Motor running / stopped
  • Pump in service / out of service
  • Alarm active / inactive
  • Communication available / unavailable

Basic Components

  • LED / Lamp Symbol: Filled, empty, illuminated, dimmed, or flashing during an alarm condition.
  • Color Codes: Green for normal / running, red for alarm / fault, yellow for warning / standby, gray for inactive / no data.
  • Label / Description: Equipment name and status texts such as RUN, STOP, or ALARM.

Use in SCADA and Energy Systems

  • Power Generation Facilities: Is the turbine running? Is the generator connected to the grid?
  • Auxiliary Systems: Cooling pump status, lubrication system active?
  • Switchyard & Automation: Breaker open / closed, is the busbar energized?

Thermometer

The Thermometer display type presents a value as the fill level of a vertical or horizontal column. It is particularly designed for monitoring temperature and similar continuous analog quantities. In SCADA and industrial dashboards, it provides awareness of limits, thresholds, and process conditions.

The Digital Equivalent of a Physical Thermometer

86 °C

The value is represented by the fill level inside the tube according to the min–max range. Bringing the familiar logic of a real-world thermometer into the digital environment makes the display easier to learn and interpret quickly.

TURBINE OIL TEMPERATURE 120 °C 90 °C 60 °C 30 °C 86 °C Current temperature

What Types of Data Is It Suitable For?

  • Continuous analog data
  • Process values with upper and lower limits
  • Slow- or medium-changing quantities

Examples

  • Temperature (°C)
  • Boiler water level (m)
  • Oil temperature (°C)
  • Tank fill ratio (%)

Basic Components

  • Scale: Min / max values and intermediate graduations (tick marks).
  • Fill Column: Column or liquid level representing the current value.
  • Colored Threshold Zones: Visual separation of normal, warning, and critical levels.
  • Numerical Reading: Current value and unit information.

Use in SCADA and Energy Systems

  • Power Generation Facilities: Boiler water temperature, turbine oil temperature
  • Thermal & Gas Power Plants: Flue gas temperature, fuel preheating temperature
  • Auxiliary Systems: Transformer oil temperature, cooling water temperature

Combined Evaluation of Display Types

These display types do not serve exactly the same purpose. The appropriate choice should be based on the physical meaning of the process variable and the information that the operator needs to perceive most quickly. Cylinder is suited to level, LinearGauge to range and limit monitoring, AngularGauge or HalfAngular to angular position, Bulb to status, and Thermometer to temperature / continuous analog quantities.

Display Primary Purpose Suitable Data Visual Logic
Cylinder Level and fill monitoring Tank, reservoir, silo Cylindrical volume + fill height
LinearGauge Range and limit monitoring Load, current, pressure, KPI Linear axis + fill / marker
AngularGauge Instantaneous position and limit Power, pressure, frequency Needle + angular arc
HalfAngular Compact angular display Load, power, pressure, frequency 180° semi-circle
Bulb Equipment / system status Boolean, state, alarm LED / lamp status
Thermometer Continuous analog quantity Temperature, level, fill ratio Column / tube fill

Basic selection principle: The display should be selected not only according to its visual appearance, but according to the physical meaning of the data. Whether the operator is asking “How full is it?”, “Where are we within the range?”, “Is it running?”, or “What level is the temperature at?” is a fundamental criterion for determining the appropriate display type.

Operational Monitoring with Live Data

The values of these displays on SCADA screens can be supplied through Live Data so that they represent the current process condition. When the value changes, the fill level, needle, linear bar, LED status, or thermometer column can reflect the new value. This allows the operator to monitor the current process condition without manually refreshing the screen.

  • Level displays: The visual level is updated as the tank or reservoir fill level changes.
  • Gauge displays: The needle or bar moves to the current value's position within the min–max range.
  • Bulb: The visual status changes when the Boolean / state value changes.
  • Thermometer: The column fill is updated as the temperature changes.

Example: If a transformer loading ratio is displayed as 78% on a LinearGauge and the new value received from SCADA is 92%, the display can automatically reflect the new position. Similarly, when a pump changes from STOP to RUN, the Bulb display can show the new status.

Implementation Note

Note: The visualizations and examples presented here are intended to explain the usage logic of the display types. Whether a particular display type is actually available in the relevant EOS LIVE DASH version depends on the supported features, data binding, and visualization capabilities of that version. A display approach that is not currently supported may be developed in the future if required.

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