Panel Indicators, Pilot Lights

Part Number	Description / PDF	Quantity
44-NKA28H-CAO Visual Communications Company, LLC	PMI .250" LED 28V TAB CLEAR AMBE	103
E16R-12Y IndustrialeMart	LED 16MM ROUND 12VDC YLW IP67	20
CNX722C200FVT Visual Communications Company, LLC	IND PMI 22MM RED FLEXVOLT SOLDER	786
W22PL-MVDLW-WLR c3controls	22MM MLTIVLT 20-277 WH W/RD LENS	100
Q12-7P5BXXHY12E APEM Inc.	LED INDICATOR 12.7MM PROMINENT B	16
CCLB-1-3046-9908-I Visual Communications Company, LLC	SEALED LED INDICATOR MID ULTRA R	72
5595501027F Dialight	LED PMI SNAP-IN RED PVC FREE	0
1090C5-12V Visual Communications Company, LLC	INDICATOR INCAND GREEN PANEL MNT	161
CCLB-2-3046-9923-W Visual Communications Company, LLC	SEALED LED INDICATOR MID ULTRA R	0
6781131111F Dialight	8MM HR/R PMI 2VFTYP W/O RES	324
Q14F1AGXXHG220E APEM Inc.	INDICATOR 220V 14MM FLUSH GREEN	12
Q10F5SXXSG02E APEM Inc.	LED PANEL IND GREEN 2.2V IP67	3
S18LGXXP Banner Engineering	INDICATOR EZ-LIGHT GREEN	12
CCLB-2-3057-9909-W Visual Communications Company, LLC	SEALED LED INDICATOR BLUE	88
M16R-20G IndustrialeMart	LED 16MM ROUND 220V GREEN	20
Q6R7CXXR02E APEM Inc.	LED PM INDICATOR RECESSED RED	37
31-030.005 EAO	INDICATOR ST D18	14
6792115341F Dialight	9MM HR/R PMI-24VDC W/O-RING	16
FL1P-12QJ-1-G110V Mallory Sonalert Products	LED GRN 12MM SNAP 110VAC/DC STK	13
FL1M-12FW-1-Y12V Mallory Sonalert Products	LED YEL 12MM NUT 12VAC/DC STK	34

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