Panel Indicators, Pilot Lights

Part Number	Description / PDF	Quantity
13SBLG24ST-13GNR c3controls	13MM ST 24V GREEN LED/LENS ROUND	200
6161332140F Dialight	LED PANEL MNT 16MM YELLOW 24VDC	222
M22-CR-24A Omron Automation & Safety Services	PILOT LIGHT SQUARE RED 24VAC/DC	5
5110F5-12V Visual Communications Company, LLC	LED GREEN 5/21" HOLE PANEL MOUNT	826
6211122304F Dialight	22MM FLTPMI RGB 6VDC W/TERM	96
Q19P1CXXR110E APEM Inc.	INDICATOR 110V 19MM PROM RED	0
Q14P3BXXB24E APEM Inc.	LED PMI PROMINENT BLUE	4
Q8F3CXXG24E APEM Inc.	LED PM INDICATOR FLUSH GREEN	41
FL1M-8FJ-2-Y2V Mallory Sonalert Products	LED YEL 8MM NUT 2VAC/DC UL STK	8
Q16P1CXXB12E APEM Inc.	INDICATOR 12V 16MM PROMINENT BLU	0
E12P-10Y IndustrialeMart	LED 12MM PROTRUDE 110V YLW IP67	40
6072312330F Dialight	LED 7MM AMBER PMI W GASKET	0
1.74508.0012600 RAFI	LED PANEL INDICATOR IP65	10
6773235332F Dialight	7MM HG/G PMI-12VDC W/O-RING	7
Q19P1BXXW24E APEM Inc.	INDICATOR 24V 19MM PROMINENT WHT	0
Q19P1CXXR12E APEM Inc.	INDICATOR 12V 19MM PROMINENT RED	0
UB01KW036G NKK Switches	INDICATOR SQ BLACK HSNG LED BLUE	40
Q8P1CXXHR02E APEM Inc.	8MM PRMNT CHRM HYPR RED 2VDC	0
QS123XXHG110 APEM Inc.	INDICATOR 12MM FIXED HI GRN 110V	165
FL1P-10QW-1-G3V Mallory Sonalert Products	LED GRN 10MM SNAP 3VAC/DC UL STK	7

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