Panel Indicators, Pilot Lights

Part Number	Description / PDF	Quantity
QH22L57YC APEM Inc.	22MM L/HALO YLW BODY FROSTED LEN	49
QS121XXW12 APEM Inc.	INDICATOR 12MM FIXED WH 12V SLDR	0
QS63XXO24 APEM Inc.	INDICATOR 6MM FIXED ORA 24V WIRE	231
QS83XXHO220 APEM Inc.	INDICATOR 8MM FIXED HI ORA 220V	0
Q6R1CXXG24E APEM Inc.	INDICATOR 24V 6MM RECESSED GRN	0
Q22F1CXXG110E APEM Inc.	INDICATOR 110V 22MM FLUSH GREEN	0
Q6F3CXXR24E APEM Inc.	LED PANEL MOUNT INDICATOR RED	173
Q8P3BXXHY110E APEM Inc.	LED PMI PROMINENT 110VAC YLW	0
Q14F3BXXY12E APEM Inc.	LED PM INDICATOR FLUSH YELLOW	133
Q16F5BXXHG12E3K6 APEM Inc.	INDICATOR 12V 16MM GRN ARROW	0
Q8F3BXXR24E APEM Inc.	LED PM INDICATOR FLUSH RED	114
Q8P1CXXY24 APEM Inc.	INDICATOR 24V 8MM PROMINENT YLW	24
Q14F3BXXY24E APEM Inc.	LED PM INDICATOR FLUSH YELLOW	3
Q14F5BXXHG24E APEM Inc.	LED INDICATOR 14MM FLUSH BLACK H	43
Q22F1CXXB12E APEM Inc.	INDICATOR 12V 22MM FLUSH BLUE	0
QS83XXHG110 APEM Inc.	INDICATOR 8MM FIXED HI GRN 110V	208
Q14P3BXXY12E APEM Inc.	LED PM INDICATOR PROMINENT YLW	0
Q8R3CXXB24E APEM Inc.	LED PM INDICATOR RECESSED BLUE	5
Q8R3CXXY12E APEM Inc.	LED PM INDICATOR RECESSED YELLOW	0
Q22P1CXXW24E APEM Inc.	INDICATOR 24V 22MM PROMINENT WHT	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