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Omron E3S-CT66-L — Photoelectric Sensors

E3S-CT66-L Omron Oil-Resistant Photoelectric Sensor, 700 mm,

MPNE3S-CT66-L

Omron E3S-CT66-L, Water and Oil-resistant Long-range through-beam photoelectric sensor, NPN/PNP selectable, 700 mm sensing distance, M12 4-pin connector.

$93.98Ref. price · indicative, final on quote
Omron E3S-CT66-L datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

E3S-CT66-L — Sensing
ParameterValue
Sensing methodThrough-Beam
TypeWater and Oil-resistant Long-range
Light sourceInfrared LED
E3S-CT66-L — Electrical
ParameterValue
Supply voltage10 to 30 VDC
E3S-CT66-L — Connection
ParameterValue
ConnectionM12 4-pin connector
E3S-CT66-L — Other specifications
ParameterValue
OutputNPN/PNP Selectable
Body typeRectangular
OperationL-ON/D-ON selectable
Housing materialMetal
Sensing directionRadial
Product life cycleActive
Max sensing distance700 mm

Product details

The Omron E3S-CT66-L is a through-beam photoelectric sensor in a rectangular metal housing rated water and oil-resistant, intended for compact machine zones where cutting fluids or washdown are present. It emits an infrared LED and senses radially at a maximum 700 mm. The output is field-selectable NPN or PNP, and the operating mode toggles L-ON or D-ON, so a single SKU covers both sinking and sourcing architectures.

Supply voltage range is 10 to 30 VDC, typical for industrial DC sensor busses. The M12 4-pin pinout follows the standard photoelectric sensor wiring; confirm polarity on the selectable output terminals before powering.

Frequently asked questions

When sourcing E3S-CT66-L, what's the closest functional second-source — E3ZM-T61 2M?

The E3ZM-T61 2M is not a direct second-source. It has 15 m range vs 700 mm, stainless steel vs painted metal, prewired cable vs M12 connector, and fixed NPN vs selectable output. Consider it only if your application tolerates a larger form factor and longer range.

What is E3S-CT66-L's listed output?

NPN/PNP selectable, along with L-ON/D-ON switching mode.

Will E3S-CT66-L drop into a panel that was specified around E3ZM-T61 2M without rewiring?

No — the E3ZM-T61 2M has a prewired 2 m cable; the E3S-CT66-L uses an M12 4-pin connector. You'll need a mating connector or adapt the harness. Also verify panel cutout dimensions as body sizes differ.

MPN
E3S-CT66-L