Part of the Omron Photoelectric Sensors series — see the full model table, lifecycle status and replacement parts.
Omron E3JK-DR12-C — 300 mm Diffuse Sensor, Relay
SKU: E3JK-DR12-CUSD 18.00
M18 diffuse-reflective sensor with built-in amplifier, 300 mm range, free-voltage 24-240 VAC/DC supply, SPDT relay output.
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Product Overview
The Omron E3JK-DR12-C is the short-range, fixed-mode sibling in the E3JK free-voltage diffuse-reflective family. manufactured by Omron Corporation. Hengyixin Automation ships this sensor from our Xiamen warehouse with a 30-day DOA return window and a datasheet PDF included in the box.
It runs on the same 24 to 240 VAC or VDC power that drives most control cabinets and uses the same SPDT relay output as the wider-range E3JK-DR11-C, but it trims the sensing range to 300 mm and removes the light-ON / dark-ON selector. Where the DR11-C is the general-purpose sensor with an adjustable mode, the DR12-C is the close-range fixed-mode variant built for dense installs where many sensors sit side by side.
Mount on the supplied E39-L40 right-angle bracket, set the single-turn sensitivity pot to a range slightly above the maximum target distance, and check the orange operation LED during the first pass to confirm reliable triggering.
Key Features
- 300 mm sensing range on a 300x300 mm white target
- Free-voltage 24-240 VAC or 24-240 VDC supply (+/- 10%, 50/60 Hz), 3 W
- SPDT relay output (1 NO + 1 NC + COM), 250 VAC 3 A / 30 VDC 3 A resistive
- E39-L40 right-angle mounting bracket included
- SKU: E3JK-DR12-C
- Series: E3JK-series M18 free-voltage photoelectric sensor
- Voltage: 24-240 VAC
Best-Fit Applications
- Stack-light or status-trigger signal in a 100-240 VAC cabinet that lacks a dedicated 24 VDC sensor rail.
- Carton flap detection at a packaging line entry, inches from the moving carton.
- Small-parts presence check at a feeder bowl outlet where many sensors mount side by side.
Buying Checklist
- Choose E3JK-RR12-C for retroreflective sensing with the E39-R1 reflector at 5 m on fixed-mode installations.
- Choose E3JK-DR11-C when you need light-ON/dark-ON field selection or sensing out to 2.5 m on the same M18 body.
- Confirm the supply is free-voltage 24-240 VAC or VDC - the C suffix is the 2 m pre-wired cable (use E3JK-DR12-D for M12).
Technical Specifications
| Series | E3JK-series M18 free-voltage photoelectric sensor |
|---|---|
| Sensing Type | Diffuse-reflective (visible red 624 nm LED) |
| Sensing Distance | 300 mm on a 300x300 mm white target (DR12 variant of the 100 mm-2.5 m DR11 family) |
| Output Type | SPDT relay (1 NO + 1 NC + COM), 250 VAC 3 A / 30 VDC 3 A resistive |
| Operating Mode | Fixed mode (factory-set; no rear light/dark switch) |
| Supply Voltage | 24-240 VAC or 24-240 VDC free-voltage (+/- 10%, 50/60 Hz), 3 W max |
| Response Time | 20 ms or less |
| Indicators | Orange operation LED + green stability LED |
| Connection | Pre-wired 2 m oil-resistant PVC cable, 5 conductors |
| Protection Rating | IP64 (IEC 60529), -25 to +55 degC operating |
FAQ for E3JK-DR12-C
What is the difference between E3JK-DR11-C and E3JK-DR12-C?
Both are M18 free-voltage diffuse-reflective sensors with the same SPDT relay output and same 2 m cable. The DR11-C has light-ON/dark-ON field selection and a 100 mm to 2.5 m range; the DR12-C is fixed-mode and rated at 300 mm. The fixed-mode optical design of the DR12-C also reduces mutual interference in dense side-by-side installations. Pick DR11-C when mode switching or long range is needed; pick DR12-C for tight, repeatable short-range detection.
Can the E3JK-DR12-C switch a 200 VAC contactor coil directly?
Yes - the SPDT relay contacts drive contactor coils up to 3 A at 250 VAC. Rated 250 VAC 3 A / 30 VDC 3 A resistive. For motors above 1/8 HP, drive the contactor coil from the relay and let the contactor switch the motor. Inrush from motor start capacitors exceeds the relay rating at any continuous motor current.
Does the E3JK-DR12-C need a separate amplifier?
No - the amplifier is built into the M18 body. Unlike the E3FA or E3Z amplifier-less sensors, the E3JK family carries the amplifier inside the barrel and runs on the free-voltage 24-240 VAC/VDC supply directly. The trade-off is the larger M18 body and slower 20 ms response versus the 0.5 ms E3FA speed.
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