E3TMiniatureand Photomicro sensors Photoelectric sensor in miniature plastic housing Small sized photoelectricsensors in flat and side view shape for demandingmounting conditions. • Small size with precision pinpoint LED where space is crucial • 3.5 mm flat model with reliable background suppression and small black/white error • Unique optical alignmenttechnology ensuring minimal deviation of optical axis • High EMC and ambient light immunity Ordering information Sensor typeSensing distance Connection method Operation mode Mounting screw size Order code*1 NPN output PNP output Through-beam 2 m – – 2 m Light-ON M2 E3T-ST31 2M E3T-ST33 2M Dark-ON M2 E3T-ST32 2M E3T-ST34 2M 1m Light-ONM2 E3T-ST11 2M E3T-ST13 2M M3E3T-ST11M 2ME3T-ST13M 2M Dark-ON M2 E3T-ST12 2M E3T-ST14 2M M3E3T-ST12M 2ME3T-ST14M 2M 300 mmLight-ONM2E3T-ST21 2M E3T-ST23 2M M3E3T-ST21M 2ME3T-ST23M 2M Dark-ON M2 E3T-ST22 2M E3T-ST24 2M M3E3T-ST22M 2ME3T-ST24M 2M Through-beam 500 mmLight-ONM2E3T-FT11 2M E3T-FT13 2M Dark-ON M2 E3T-FT12 2M E3T-FT14 2M 300 mmLight-ONM2E3T-FT21 2M E3T-FT23 2M Dark-ON M2 E3T-FT22 2M E3T-FT24 2M Retro-reflective 30 to 200 mm*2 on reflectors/ 10 to 100 mm*2 Light-ON M2 E3T-SR41-C 2M*3 E3T-SR43-C 2M*3 on reflective foils Dark-ON M2 E3T-SR42-C 2M*3E3T-SR44-C 2M*3 Diffuse-reflective 5 to 30 mm Light-ON M2E3T-FD11 2ME3T-FD13 2M M3E3T-FD11M 2ME3T-FD13M 2M Dark-ON M2E3T-FD12 2ME3T-FD14 2M M3E3T-FD12M 2ME3T-FD14M 2M Limited-reflective5 to 15 mm Light-ON M2E3T-SL11 2M E3T-SL13 2M M3E3T-SL11M 2ME3T-SL13M 2M Dark-ON M2 E3T-SL12 2M E3T-SL14 2M M3E3T-SL12M 2ME3T-SL14M 2M 5 to 30 mm Light-ON M2E3T-SL21 2M E3T-SL23 2M M3E3T-SL21M 2ME3T-SL23M 2M Dark-ON M2 E3T-SL22 2M E3T-SL24 2M M3E3T-SL22M 2ME3T-SL24M 2M Diffuse-reflective (background suppression) 1 to 15 mm Light-ON M2E3T-FL11 2M E3T-FL13 2M Dark-ON M2 E3T-FL12 2M E3T-FL14 2M 1 to 30 mm Light-ON M2E3T-FL21 2M E3T-FL23 2M Dark-ON M2 E3T-FL22 2M E3T-FL24 2M *1For pre-wired models with robotic cables add '-R' to the order code (example: E3T-FT21R 2M) *2The distances are measured with reflector E39-R4 and reflectivefoil E39-R37-CA. For applications with shorter distances between the sensor and the reflector contact your OMRON representative. *3Order reflector separately. Models with included reflectors are available. 192 E3TMiniatureand Photomicro sensors Specifications Item Through-beamRetro-reflective Side-view FlatSide-view E3T-ST1 E3T-ST2 E3T-ST3 Sensing distanceE3T-ST3_: 2 m E3T-ST1_: 1 m E3T-ST2_: 300 mm Light source (wave length)Red LED (“Pin-point” LED) = 650 nm Power supply voltage12 to 24 VDC±10%, ripple (p-p) 10% max. Protective circuits Power supply and control output reverse polarity protection Output short-circuit protection Response time 1 ms max. E3T-FT1 E3T-FT2 E3T-FT1_: 500 mm E3T-FT2_: 300 mm E3T-SR4 30 to 200 mm (with E39-R4) 10 to 100 mm (with E39-R37-CA) Power supply and control output reverse polarity protection Output short-circuit protection, mutual interference preven- tion, surge suppressor Ambient Operating –25 to 55°C (with no icing or condensation) temperature Storage –40 to 70°C (with no icing or condensation) Degree of protection IEC60529 IP67 Material CasePBT (polybutylene terephthalate) Display windowDenatured polyarylate LensDenatured polyarylate Methacrylic resin Item Diffuse-reflectiveLimited-reflectiveDiffuse-reflective (background suppression) FlatSide-view Flat E3T-FD1 E3T-SL1E3T-SL2E3T-FL1E3T-FL2 Sensing distance5 to 30 mm 5 to 15 mm 5 to 30 mm 1 to 15 mm 1 to 30 mm Black/white error –15% max. Light source (wave length)Red LED (“Pin-point” LED) = 650 nm Power supply voltage12 to 24 VDC±10%, ripple (p-p) 10% max. Protective circuits Power supply and control output reverse polarity protection Output short-circuit protection, Mutual interference prevention Response time 1 ms max. Ambient Operating –25 to 55°C temperature Storage –40 to 70°C (with no icing or condensation) Degree of protection IEC60529 IP67 Material CasePBT (polybutylene terephthalate) Display windowDenatured polyarylate LensDenatured polyarylate (mm) 25 20 15 10 5 Light receiving lens Flip chip (IC) Light receiving element 0 White paper Black paper Rear Front Side E3T-FL1@ Minimal black / white errorThe coaxial optics and the small focal lens of the retro-reﬂective models allow the detection of small (dia 2 mm) objects or through small holes (dia 2 mm). The unique light receiving lens shape and the chip mounting technology, provide appropriate sensing distances for very precise and reliable detection even through smallest slits and gaps with e.g. 0.5 mm dia. Models with mounting holes for M2 or M3 screws 193
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