Name: Omron E3JM-R4M4T-G Retro-Reflective Photoelectric Sensor with Timer - INOSAKI
SKU: Omron-E3JM-R4M4T-G
Price: 57.51 USD
Availability: InStock

Technical Overview

The Omron E3JM-R4M4T-G is a highly versatile retro-reflective photoelectric sensor featuring a built-in power supply and a programmable timer function. Designed for reliable long-range object detection up to 4 meters, it utilizes a polarized red LED (660nm) light source to ensure accurate sensing even with reflective objects. The sensor is housed in a durable, IP66-rated ABS cuboid enclosure, making it suitable for harsh industrial environments. It offers broad application flexibility with its multi-voltage capability, operating seamlessly on 12-240 VDC or 24-240 VAC. The integrated relay output supports both Dark-ON and Light-ON modes, while the built-in timer can be adjusted from 0.1 to 5 seconds for ON-delay, OFF-delay, or one-shot delay operations.

Key Features

Retro-reflective sensing method with a maximum sensing distance of 4 meters.
Built-in timer function adjustable from 0.1 to 5 seconds (ON-delay, OFF-delay, one-shot).
Multi-voltage operation supporting 12-240 VDC and 24-240 VAC.
Polarized red LED (660nm) light source for accurate detection of shiny or reflective objects.
Relay output (SPDT) with selectable Light-ON/Dark-ON operation.
Durable ABS plastic housing with IP66 protection rating for harsh environments.
Terminal block connection with PG 13.5 conduit entry for secure wiring.

Technical Specification Matrix

Parameter	Value
Sensing Distance	4 m
Light Source	Polarized Red LED (660 nm)
Supply Voltage	12-240 VDC, 24-240 VAC
Output Type	Relay SPDT (3A at 250 VAC / 5 VDC)
Operating Mode	Light-ON / Dark-ON (Selectable)
Response Time	30 ms
Timer Range	0.1 to 5 seconds
IP Rating	IP66
Operating Temperature	-25°C to +55°C
Housing Material	ABS Plastic
Connection Method	Terminal Block (PG 13.5 Conduit)

Industrial Applications

1. Automated Conveyor Jam Detection

In warehousing and packaging facilities, conveyors can frequently jam. The E3JM-R4M4T-G can be installed across a conveyor belt (up to 4m wide) using its retro-reflective configuration. By setting the built-in OFF-delay timer, the sensor will trigger an alarm or stop the belt if the light beam remains blocked for longer than the set time (e.g., 2 seconds), indicating a jam rather than a normal package passing.

Problem Solved

Prevents product damage and mechanical strain on conveyor motors by instantly detecting traffic jams and halting the line without requiring a separate external PLC timer.

Retro-reflectiveOFF-delay Timer4m Sensing RangeRelay Output

2. Industrial Bay Door Safety Interlock

In industrial loading bays, large roll-up doors need a safety mechanism to prevent them from closing on forklifts or personnel. The multi-voltage capability allows the E3JM-R4M4T-G to integrate easily into the existing 120VAC or 240VAC door motor control circuits. Mounted across the door threshold, the polarized red light easily detects obstacles (even shiny forklift forks) over the wide 4-meter span.

Problem Solved

Ensures compliance with safety standards by preventing industrial automated doors from crushing vehicles or personnel, utilizing polarized sensing to reject false signals from highly reflective surfaces.

Multi-voltage 24-240 VACPolarized Red LEDIP66 RatingLight-ON / Dark-ON

3. Vehicle Positioning in Automated Car Washes

Positioning vehicles accurately within automated car wash bays requires sensors that can withstand wet, harsh environments. The IP66-rated E3JM-R4M4T-G is perfectly suited for this. Using the ON-delay timer, the system can ensure the vehicle has fully stopped in the correct position for a sustained period before initiating the high-pressure wash cycle, ignoring brief beam breaks from spray or walking attendants.

Problem Solved

Provides a highly reliable, waterproof sensing solution that filters out momentary obstructions like water spray or moving attendants via an integrated ON-delay timer.

IP66ON-delay TimerTerminal Block12-240 VDC