Optical Sensors - Photointerrupters - Slot Type

Optical Sensors - Photointerrupters - Slot Type - Logic Output

Part Number	Description / PDF	Quantity
HOA6971-N51 Honeywell Sensing and Productivity Solutions	SENSOR OPTICAL 3.18MM PCB MOUNT	58
HOA2003-001 Honeywell Sensing and Productivity Solutions	SENSOR OPTICAL 2.54MM MOD SLOT	0
HOA6991-L51 Honeywell Sensing and Productivity Solutions	SENSOR OPTICAL 3.18MM MOD WIRE	0
HOA6991-T51 Honeywell Sensing and Productivity Solutions	SENSOR OPTICAL 3.18MM MOD WIRE	0
HOA6970-N51 Honeywell Sensing and Productivity Solutions	SENSOR OPTICAL 3.18MM PCB MOUNT	0
HOA2001-001 Honeywell Sensing and Productivity Solutions	SENSOR OPTICAL 3.05MM PCB MOUNT	0
HOA6985-T51 Honeywell Sensing and Productivity Solutions	SENSOR OPTICAL 3.18MM MOD WIRE	0
HOA6981-T51 Honeywell Sensing and Productivity Solutions	SENSOR OPTICAL 3.18MM MOD WIRE	0
HOA0973-N51 Honeywell Sensing and Productivity Solutions	SENSOR OPTICAL 3.18MM PCB MOUNT	0
HOA6993-T51 Honeywell Sensing and Productivity Solutions	SENSOR OPTICAL 3.18MM MOD WIRE	0
HOA6299-002 Honeywell Sensing and Productivity Solutions	SENSOR OPTICAL 63.5MM MOD W/CONN	0
HOA6299-003 Honeywell Sensing and Productivity Solutions	SENSOR OPTICAL 63.5MM MOD W/CONN	0
HOA6961-N51 Honeywell Sensing and Productivity Solutions	SENSOR OPTICAL 3.18MM PCB MOUNT	0
HOA6990-P55 Honeywell Sensing and Productivity Solutions	SENSOR OPTICAL 3.18MM MOD WIRE	0
HOA7730-M11 Honeywell Sensing and Productivity Solutions	SENSOR OPTICAL 3MM MODULE SLOT	0
HOA0901-011 Honeywell Sensing and Productivity Solutions	SENSOR OPTICAL 3.2MM PCB MOUNT	0
HOA0902-012 Honeywell Sensing and Productivity Solutions	SENSOR OPTICAL 3.2MM PCB MOUNT	0
HOA0963-T51 Honeywell Sensing and Productivity Solutions	SENSOR OPTICAL 3.18MM PCB MOUNT	0
HOA7730-M22 Honeywell Sensing and Productivity Solutions	SENSOR OPTICAL 3MM MODULE SLOT	0
HOA0901-012 Honeywell Sensing and Productivity Solutions	SENSOR OPTICAL 3.2MM PCB MOUNT	0

Optical Sensors - Photointerrupters - Slot Type - Logic Output

1. Overview

Slot-type photointerrupters with logic output are optoelectronic sensors consisting of a light emitter (usually infrared LED) and a photodetector (phototransistor or photodiode) aligned in a U-shaped housing. When an object interrupts the light beam between the slot, the sensor generates a logic-level output signal. These devices are critical in industrial automation, consumer electronics, and medical equipment for position detection, motion control, and object counting.

2. Main Types & Functional Classification

Type	Functional Features	Application Examples
Transmissive Slot Type	Direct light beam interruption detection	Encoder position detection
Reflective Slot Type	Detects reflected light from target objects	Color mark sensing in printing machines
Logic Output Variant	Integrated comparator circuit for digital output	Industrial safety interlocks

3. Structure & Components

Typical construction includes: - Infrared LED emitter (850-940nm wavelength) - Phototransistor detector with built-in amplifier - Plastic housing forming mechanical slot (0.5-10mm width) - Integrated circuit for signal conditioning - Lead frame for PCB mounting (through-hole or SMD)

4. Key Technical Specifications

Parameter	Typical Value	Importance
Slot Width	2.0 - 8.0 mm	Determines target object size detection
Response Time	2 - 20 s	Crucial for high-speed applications
Output Type	NPN/PNP Open Collector	Compatibility with control systems
Current Transfer Ratio	100-600%	Signal strength and reliability
Operating Temperature	-40 C to +85 C	Environmental durability

5. Application Fields

Industrial automation: Conveyor belt object counting
Office equipment: Paper jam detection in printers
Medical devices: Syringe pump position verification
Consumer electronics: Appliance door interlock systems
Automotive: Gear position detection in transmission systems

6. Leading Manufacturers & Products

Manufacturer	Representative Product	Key Features
Omron	EE-SX671	Miniature slot (1.7mm), 10 s response time
Vishay	VESPE-2020	High-temperature resistance (-40 C to +125 C)
STMicroelectronics	VN8905	Integrated logic output with hysteresis

7. Selection Guidelines

Key considerations: - Required slot width vs target object dimensions - Environmental factors (dust, vibration, temperature) - Electrical compatibility with host system - Mechanical mounting constraints (through-hole vs SMD) - Required detection speed and output response time - EMI/RFI immunity for industrial environments

8. Industry Trends

Current developments include: - Miniaturization for mobile device integration - Smart sensors with embedded diagnostics - Wireless-enabled models for IoT applications - Improved optical efficiency through GaAlAs LEDs - Multi-channel integration for parallel detection