Panel Indicators, Pilot Lights

Part Number	Description / PDF	Quantity
QS101XXHO220 APEM Inc.	INDICATOR 10MM FIXED HI ORA 220V	77
1.11.071.001/0440 RAFI	LED PANEL IND 24V IP66/IP67/IP69	10
Q8F1CXXB12E APEM Inc.	INDICATOR 12V 8MM FLUSH BLUE	4
50747603731500F Dialight	LED PANEL IND 14V 20MA RED	800
5592501001F Dialight	LED PMI SNAP-IN 600NM ORN .250"	0
NL2950WL2R Bulgin	LAMP NEON PNL MNT 125V RED	646
1090C3-12V Visual Communications Company, LLC	INDICATOR INCAND AMBER PANEL MNT	1496
FL1P-12QW-2-G12V Mallory Sonalert Products	LED GRN 12MM SNAP 12VAC/DC STK	25
6201102304F Dialight	8MM FLT PMI RD 6 VDC W/TERMS	185
6039-004-304G-A Visual Communications Company, LLC	PANEL INDICATOR LED GREEN 2V	626
Q14P1BXXW24E APEM Inc.	INDICATOR 24V 14MM PROMINENT WHT	0
PM5-A5W12V Califia Lighting (Bivar)	PANEL MOUNT ASSEM 6.35MM WHITE	0
MPR3RDW12.0 Califia Lighting (Bivar)	LED PANEL INDICATOR RED 2.1V	197
2191U1-12V Visual Communications Company, LLC	LED IND LIGHT 12V RED	85
L65DG24L Visual Communications Company, LLC	LED 5MM GREEN DIFFUSED PANELMT	1711
Q14F5AYXXHY24E APEM Inc.	INDICATOR 24V 14MM FLUSH YELLOW	0
556360A304F Dialight	1"DOME GRN LED PMI CONST INT	22
01-050.005 EAO	INDICATOR 18X18 ST	34
SSI-RM3091SUGD-150 Lumex, Inc.	LED 3MM SUP GREEN REAR PANEL MNT	2904
Q22F1BXXW12E APEM Inc.	INDICATOR 12V 22MM FLUSH WHITE	0

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