Name: Omron EE-SX951-R 1M Ultra-Compact Slot-Type Photomicro Sensor - INOSAKI
SKU: Omron-EE-SX951-R 1M
Price: 20.70 USD
Availability: InStock

Technical Overview

The Omron EE-SX951-R 1M is an ultra-compact, L-shaped photomicro sensor (slot-type optical fork sensor) designed for precise presence and position detection in industrial automation. It features a 5 mm through-beam sensing slot and utilizes a 940 nm infrared LED to detect opaque objects as small as 1.8 x 0.8 mm. Designed for durability in dynamic applications, this model is equipped with a 1-meter bending-resistant robot cable, making it ideal for moving machine parts. It provides an NPN open-collector output with switchable Dark-ON/Light-ON modes and boasts a rapid 1 kHz switching frequency. Operating on a versatile 5 to 24 VDC supply voltage, the sensor is enclosed in a durable IP50-rated PBT polymer housing capable of withstanding ambient temperatures from -25°C to +55°C.

Key Features

Ultra-compactL-shapedhousingforconstrainedspaceinstallations[1.1]
5 mm sensing slot width for precision through-beam detection
1-meter bending-resistant robot cable for dynamic and robotic applications
NPN open collector output with selectable Light-ON/Dark-ON operation
High-speed 1 kHz response frequency
Built-in load short-circuit protection circuit
Compatible with both M2 and M3 screw mounting methods
IP50 protection rating and -25°C to +55°C operating temperature range

Technical Specification Matrix

Parameter	Value
Sensing Distance	5 mm (slot width)
Standard Sensing Object	Opaque: 1.8 x 0.8 mm min.
Supply Voltage	5 to 24 VDC ±10% (10% ripple max.)
Output Type	NPN Open Collector
Operating Mode	Light-ON/Dark-ON (2 outputs)
Response Frequency	1 kHz min.
Current Consumption	15 mA max.
Load Current	50 mA max.
Light Source	Infrared LED (940 nm)
Connection Method	Pre-wired, Robot cable (1 m)
Degree of Protection	IP50
Ambient Operating Temperature	-25°C to +55°C

Industrial Applications

1. Robotic Arm End-Effector Tool Verification

Mounted directly on a highly dynamic pick-and-place robotic arm, the sensor confirms the correct seating of small tools or components within the end-effector gripper.

Problem Solved

The 1-meter bending-resistant robot cable eliminates the risk of wire fatigue or breakage caused by constant mechanical flexing. The high 1 kHz response frequency ensures real-time feedback to the robot controller during rapid motion cycles.

Bending-resistant robot cable1 kHz frequencyNPN open-collectorThrough-beam detectionIP50

2. Precision Conveyor Indexing for Miniaturized Assembly

Installed along miniature automated conveyor tracks to detect, count, and position tiny electronic components prior to surface-mount technology (SMT) placement or packaging.

Problem Solved

The 5 mm slot width and ability to reliably detect opaque objects as small as 1.8 x 0.8 mm provide critical positional accuracy. The ultra-compact L-shaped design allows for low-profile mounting within constrained machine footprints using M2 or M3 screws.

5 mm slot width1.8 x 0.8 mm opaque detectionInfrared LED 940 nmL-shaped photomicro sensorM2/M3 mounting

3. Automated Dispensing Machine Limit Switch

Acts as a highly accurate zero-point or over-travel limit switch for motorized linear actuators operating within automated liquid dispensing or 3D printing equipment.

Problem Solved

The sensor's built-in load short-circuit protection safely guards the PLC or controller I/O from unexpected wiring faults. Selectable Light-ON/Dark-ON modes offer fail-safe programming flexibility depending on the actuator's required home state.

Load short-circuit protection5 to 24 VDCLight-ON/Dark-ON0.025 mm differential travelOptical fork sensor