Panel Indicators, Pilot Lights

Part Number	Description / PDF	Quantity
6791115341F Dialight	9MM HR/R PMI-24VDC W/O-RING	0
556170A314F Dialight	1"FLAT YLW LED PMI CONST INT	27
QS81XXW24 APEM Inc.	INDICATOR 8MM FIXED WHT 24V SLDR	0
Q14F1BXXR12E APEM Inc.	INDICATOR 12V 14MM FLUSH RED	13
Q8F3BXXW24E APEM Inc.	LED PM INDICATOR FLUSH WHITE	0
DX1092/YL Bulgin	LED PANEL INDICATOR YLW 2.1V	152
E08P-10Y IndustrialeMart	LED 8MM PROTRUDE 110V YLW IP67	40
45-2T00.10J0.000 EAO	INDICATOR ACTUATOR FULL FACE ILL	26
QS123XXR24 APEM Inc.	INDICATOR 12MM FIXED RD 24V WIRE	542
FVLU24LR-PLLRD c3controls	30MM FV LIGHT 24V RED LED/LENS	198
LE2950WL5C Bulgin	LED PNL MNT 125/250V CLEAR	46
1092A1-28V Visual Communications Company, LLC	LED PANEL INDICATOR RED 28V	8
6303805304F Dialight	30MM DOM BL 120VAC W/TERM	10
6071312330F Dialight	LED 7MM AMBER PMI W GASKET	0
6563205304F Dialight	LED 1/2" DOME GRN 120AC/DC TERM	22
FL1P-8NJ-1-G12V Mallory Sonalert Products	LED GRN 8MM NUT 12VAC/DC STK	41
6792125341F Dialight	9MM HR/R PMI-24VDC W/O-RING	142
1050QA1 Visual Communications Company, LLC	INDICATOR NEON RED PANEL MNT	22
FL1P-8QJ-2-Y2V Mallory Sonalert Products	LED YEL 8MM SNAP 2VAC/DC STK	18
SSI-LXR3612SRD Lumex, Inc.	LED 3MM SUPER RED DIFF PANEL MT	2170

Panel Indicators, Pilot Lights

1. Overview

Panel indicators and pilot lights are optoelectronic devices that provide visual status feedback in electrical and electronic systems. These components convert electrical signals into light outputs, enabling operators to monitor equipment conditions at a glance. Their importance spans across industrial automation, consumer electronics, transportation, and medical devices, where reliable visual indication ensures operational safety, efficiency, and user interaction.

2. Major Types and Functional Classification

Type	Functional Features	Application Examples
LED Panel Indicators	Low power consumption, long lifespan, instant response	Industrial control panels, HVAC systems
Lamp-based Pilot Lights	High brightness, compatibility with AC/DC circuits	Machinery status indication, heavy-duty equipment
Combined Indicator/Switch	Integrated illumination with manual control	Emergency stop circuits, control desks
Multi-color Indicators	Programmable color outputs for status differentiation	Network routers, medical diagnostic equipment
Remote Indicators	Separate light source and panel module	Automotive dashboards, aerospace control systems

3. Structure and Components

Typical construction includes:

Light Source: LED chips or filament bulbs with specific color/wavelength
Housing: Thermoplastic or metal body with mounting threads (e.g., M20, NPT)
Optical System: Diffused or focused lens for uniform light distribution
Electrical Interface: Screw terminals, PCB pins, or quick-connect terminals
Sealing Elements: Rubber gaskets for IP65+ protection ratings

4. Key Technical Specifications

Parameter	Significance
Operating Voltage Range	Determines compatibility with control circuits (3-480V AC/DC)
Luminous Intensity (cd)	Affects visibility in different lighting conditions
Color Wavelength (nm)	Standardizes visual coding (e.g., 630nm red for warnings)
MTBF (Hours)	Indicates reliability (LED: 50,000-100,000 hours)
IP Rating	Defines environmental protection level
Response Time (ms)	Critical for real-time status monitoring

5. Application Areas

Industrial: CNC machines, PLC control cabinets, factory automation
Transportation: Locomotive control panels, aircraft avionics
Medical: Patient monitors, imaging equipment status indicators
Consumer: Home appliance power indicators, audio equipment
Energy: Solar inverters, smart grid monitoring systems

6. Leading Manufacturers and Products

Manufacturer	Representative Product	Key Features
Phoenix Contact	ILLINOX series	Modular design, IP69K rating
Omron	XLDC12E-4AH	Ultra-compact LED indicator with 100,000-hour lifespan
Siemens	8WA1000 series	Multi-voltage capability (24-415V AC/DC)
Eaton	Pilot Lights H45K	Shock-resistant filament lamps for heavy-duty use
TE Connectivity	CapLED	Capacitive touch-enabled indicator

7. Selection Recommendations

Key considerations:

Environmental factors: Temperature range (-40 C to +85 C), vibration levels
Electrical compatibility: Voltage matching and circuit type (AC/DC)
Visibility requirements: Ambient light conditions and viewing distance
Certification needs: UL, CE, RoHS compliance for regulatory environments
Mechanical specifications: Panel cutout size (commonly 16/22/30mm)

Example: Selecting an IP67-rated LED indicator with 24V DC operation for a food processing plant's washdown area.

Industry Trends

Emerging developments include:

Integration with IoT systems for smart status monitoring
Miniaturization for high-density panel designs
RGB-LED technology for dynamic color coding
Energy harvesting indicators for self-powered operation
Enhanced durability coatings for extreme environments