Panel Indicators, Pilot Lights

Part Number	Description / PDF	Quantity
SSI-LXR3612YD Lumex, Inc.	LED 3MM YELLOW DIFF PANEL MOUNT	1219
CNX718N40028T Visual Communications Company, LLC	LED 18MM AMBER 28V TAB PNL MNT	0
Q16P1BXXY110E APEM Inc.	INDICATOR 110V 16MM PROM YELLOW	0
S18LGXXPQ Banner Engineering	INDICATOR EZ-LIGHT GREEN	1
6123232120F Dialight	LED PANEL MNT 12MM GREEN 6VDC	270
Q14F5AGXXHG12E APEM Inc.	INDICATOR 12V 14MM FLUSH GREEN	91
84-8001.6640 EAO	INDICATOR-ELEMENT 24VDC/10MA SIN	20
5563803304F Dialight	LED PNL MT 1" 12V WT DOME BLUE	29
6092312120F Dialight	LED PNL MT 9MM 6V CHROME YELLOW	0
PCL2212V600B Visual Communications Company, LLC	PMI RND 22MM LED 12V SCREW BLOCK	34
2191U5-6V Visual Communications Company, LLC	LED GREEN 6V PNL MNT	6
Q8P3BXXW24E APEM Inc.	LED PM INDICATOR PROMINENT WHITE	0
FL1P-12QW-1-R12V Mallory Sonalert Products	LED RED 12MM SNAP 12VAC/DC STK	37
FL1P-10NW-4-G12V Mallory Sonalert Products	LED GRN 10MM NUT 12VAC/DC STK	39
6823435144F Dialight	LED PANEL INDCATOR BLUE 24V	138
M22N-BP-TAA-AD Omron Automation & Safety Services	LED PANEL INDICATOR BLUE 110VAC	0
M10R-10Y IndustrialeMart	LED 10MM ROUND 110V YELLOW	52
6781415334F Dialight	8MM HB/B PMI-12VDC W/O-RING	250
FL1M-8SJ-2-G12V Mallory Sonalert Products	LED GRN 8MM NUT 12VAC/DC STK	240
S12F-24B IndustrialeMart	HIGH LED 12MM FLAT 24V BLUE IP67	39

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