Panel Indicators, Pilot Lights

Part Number	Description / PDF	Quantity
32-2111 Visual Communications Company, LLC	NEON PANEL INDICATOR 125V	0
1050QN4 Visual Communications Company, LLC	INDICATOR NEON WHITE PANEL MNT	90
6561357303F Dialight	PANEL IND 72V 1/2" FLT OR W/LEAD	60
32R-2112T Visual Communications Company, LLC	NEON PANEL INDICATOR 125V	62
2110A2 Visual Communications Company, LLC	INDICATOR NEON CLEAR PANEL MNT	62
Q22P1BXXY110E APEM Inc.	INDICATOR 110V 22MM PROM YELLOW	0
QS121XXO24 APEM Inc.	INDICATOR 12MM FIXED OR 24V SLDR	0
JF01PF NKK Switches	INDICATOR SQUARE GREEN PC	0
MPC5GD Califia Lighting (Bivar)	LED ASSY PNL 5MM GRN DIFF 565NM	64
6062415110F Dialight	LED PNL IND 6MM R,G 2V RECESS	711
6563108303F Dialight	1/2" DOM RD 37.5VDC W/LEAD	0
FL1M-12SJ-1-R24V Mallory Sonalert Products	LED RED 12MM NUT 24VAC/DC STK	23
QS81XXHW110 APEM Inc.	INDICATOR 8MM FIXED HI WHT 110V	0
FL1P-10QW-1-Y12V Mallory Sonalert Products	LED YEL 10MM SNAP 12VAC/DC UL ST	5
Q6R1CXXG24 APEM Inc.	INDICATOR 24V 6MM RECESSED GRN	19
41-NKR120-CRO Visual Communications Company, LLC	PMI .250" LED 120V TAB CLEAR RED	98
5592301003F Dialight	LED PANEL YLW DIFF 2V SNAP 6"LD	890
QS101XXR24 APEM Inc.	INDICATOR 10MM FIXED RD 24V SLDR	19
5590303027F Dialight	LED PMI SNAP-IN YLW PVC FREE	0
36EN-2313 Visual Communications Company, LLC	AMBR NEON 125 VOLTS	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