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E3T

Ultracompact, Ultrathin Photoelectric Sensor with Built-in Amplifier

E3T

The Improved E3T Series with Easier, Smoother Mounting and Installation

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last update: April 7, 2025

Sensing method Through-beam
Appearance Rectangular type (Side-view)
409_sp_1_1
NPN
output		 Light-ON E3T-ST31 E3T-ST31F E3T-ST11
E3T-ST11M		 E3T-ST11F
E3T-ST11MF		 E3T-ST21
E3T-ST21M		 E3T-ST21F
E3T-ST21MF
Dark-ON E3T-ST32 E3T-ST32F E3T-ST12
E3T-ST12M		 E3T-ST12F
E3T-ST12MF		 E3T-ST22
E3T-ST22M		 E3T-ST22F
E3T-ST22MF
PNP
output		 Light-ON E3T-ST33 E3T-ST33F E3T-ST13
E3T-ST13M		 E3T-ST13F
E3T-ST13MF		 E3T-ST23
E3T-ST23M		 E3T-ST23F
E3T-ST23MF
Dark-ON E3T-ST34 E3T-ST34F E3T-ST14
E3T-ST14M		 E3T-ST14F
E3T-ST14MF		 E3T-ST24
E3T-ST24M		 E3T-ST24F
E3T-ST24MF
Sensing distance 2 m 1 m 300 mm
Standard sensing
object		 Opaque, 3-mm dia. min. Opaque, 2-mm dia. min.
Minimum detectable
object
(reference value)		 Opaque, 3-mm dia. Opaque, 2-mm dia.
Hysteresis (white
paper)		 ---
Black/white error ---
Directional angle Emitter: 2° to 20°
Receiver: 2° to 70°
Light source
(wavelength)		 Red LED
(650 nm)		 Infrared LED
(860 nm)		 Red LED
(650 nm)		 Infrared LED
(860 nm)		 Red LED
(650 nm)		 Infrared LED
(860 nm)
Power supply voltage 12 to 24 VDC ±10%, ripple (p-p) 10% max.
Current consumption 30 mA max. (Emitter 10 mA max., Receiver 20 mA max.)
Control output Load power supply voltage: 26.4 VDC max.
Load current: 50 mA max. (residual voltage: 2 V max. for load current of 10 to 50 mA,
1 V max. for load current of less than 10 mA)
Open-collector output
Indicators Operation indicator (orange), Stability indicator (green)
Protection circuits Power supply and control output reverse polarity protection,
Output short-circuit protection
Response time Operate or reset: 1 ms max.
Ambient illumination Incandescent lamp: 5,000 lx max., Sunlight: 10,000 lx max.
Ambient temperature
range		 Operating: -25 to 55°C
Storage: -40 to 70°C
(with no icing or condensation)
Ambient humidity
range		 Operating: 35% to 85%
Storage: 35% to 95%
(with no condensation)
Insulation resistance 20 MΩ min. at 500 VDC
Dielectric strength AC1,000V, 50/60 Hz for 1 min.
Vibration resistance
(destruction)		 10 to 2,000 Hz, 1.5-mm double amplitude or 300 m/s2 for 0.5 hours each in X, Y, and
Z directions
Shock resistance
(destruction)		 1,000 m/s2 3 times each in X, Y, and Z directions
Degree of protection *1 IEC 60529 IP67
Connection method Pre-wired (standard length: 2 m)
Weight (packed state) Approx. 40 g
Materials Case PBT (polybutylene terephthalate)
Display
window		 Denatured polyarylate
Lens Denatured polyarylate
Hexagonal
nuts		 ---
Toothed
washers		 ---
Conformity standards CE Marking, ISO13849-1 (PLc, cat1) *1
MTTFd (Year) E3T-ST[][]/E3T-FT[][]: 398
E3T-ST[][]F/E3T-FT[][]F: 393
Accessories *2 Instruction manual, Set screws for mounting (Side-view Sensors: M2 × 14,
Flat Sensors: M2 × 8), Nuts

*1. Degree of protection conforming to ISO13849-1 (PLc, cat1) is IP54 for E3T-ST series and IP67 for E3T-FT series. Conforms to December 2023.
Refer to the Instruction Sheet and Information for ISO13849-1 Compliance.
If a slit (E39-S63/S64) is attached to the sensor,it is not applicable to ISO13849-1 (PLc, cat1).
*2. Only the Instruction Manual is included with an M3-mounting Sensor (E3T-ST[][]M(F)). Order the Set of Mounting Screws separately if required.

Sensing method Through-beam
Appearance Rectangular type (Flat)
409_sp_1_2
NPN
output		 Light-ON E3T-FT11 E3T-FT11F E3T-FT21 E3T-FT21F
Dark-ON E3T-FT12 E3T-FT12F E3T-FT22 E3T-FT22F
PNP
output		 Light-ON E3T-FT13 E3T-FT13F E3T-FT23 E3T-FT23F
Dark-ON E3T-FT14 E3T-FT14F E3T-FT24 E3T-FT24F
Sensing distance 500 mm 300 mm
Standard sensing object Opaque, 1.3-mm dia. min.
Minimum detectable object
(reference value)		 Opaque, 1.3-mm dia.
Hysteresis (white paper) ---
Black/white error ---
Directional angle Emitter: 3° to 25°
Receiver: 3° min.
Light source (wavelength) Red LED (650 nm) Infrared LED
(860 nm)		 Red LED (650 nm) Infrared LED
(860 nm)
Power supply voltage 12 to 24 VDC ±10%, ripple (p-p) 10% max.
Current consumption 30 mA max. (Emitter 10 mA max., Receiver 20 mA max.)
Control output Load power supply voltage: 26.4 VDC max.
Load current: 50 mA max. (residual voltage: 2 V max. for load current of 10 to 50 mA,
1 V max. for load current of less than 10 mA)
Open-collector output
Indicators Operation indicator (orange), Stability indicator (green)
Protection circuits Power supply and control output reverse polarity protection,
Output short-circuit protection
Response time Operate or reset: 1 ms max.
Ambient illumination Incandescent lamp: 5,000 lx max., Sunlight: 10,000 lx max.
Ambient temperature range Operating: -25 to 55°C
Storage: -40 to 70°C
(with no icing or condensation)
Ambient humidity range Operating: 35% to 85%
Storage: 35% to 95%
(with no condensation)
Insulation resistance 20 MΩ min. at 500 VDC
Dielectric strength AC1,000V, 50/60 Hz for 1 min.
Vibration resistance
(destruction)		 10 to 2,000 Hz, 1.5-mm double amplitude or 300 m/s2 for 0.5 hours each in X, Y, and
Z directions
Shock resistance
(destruction)		 1,000 m/s2 3 times each in X, Y, and Z directions
Degree of protection *1 IEC 60529 IP67
Connection method Pre-wired (standard length: 2 m)
Weight (packed state) Approx. 40 g
Materials Case PBT (polybutylene terephthalate)
Display window Denatured polyarylate
Lens Denatured polyarylate
Hexagonal nuts ---
Toothed washers ---
Conformity standards CE Marking, ISO13849-1 (PLc, cat1) *1
MTTFd (Year) E3T-ST[][]/E3T-FT[][]: 398
E3T-ST[][]F/E3T-FT[][]F: 393
Accessories *2 Instruction manual, Set screws for mounting (Side-view Sensors: M2 × 14,
Flat Sensors: M2 × 8), Nuts

*1. Degree of protection conforming to ISO13849-1 (PLc, cat1) is IP54 for E3T-ST series and IP67 for E3T-FT series. Conforms to December 2023.
Refer to the Instruction Sheet and Information for ISO13849-1 Compliance.
If a slit (E39-S63/S64) is attached to the sensor,it is not applicable to ISO13849-1 (PLc, cat1).
*2. Only the Instruction Manual is included with an M3-mounting Sensor (E3T-ST[][]M(F)). Order the Set of Mounting Screws separately if required.

Sensing method Through-beam Retro-reflective
(without M.S.R. function)
Appearance Cylindrical type
(Top-view)
409_sp_2_1		 Cylindrical type
(Side-view)
409_sp_2_2		 Rectangular type
(Side-view)
409_sp_2_3
NPN
output		 Light-ON --- --- E3T-SR41
Dark-ON E3T-CT12 E3T-CT22S E3T-SR42
PNP
output		 Light-ON --- --- E3T-SR43
Dark-ON E3T-CT14 E3T-CT24S E3T-SR44
Sensing distance 1 m 500 mm 200 mm [30 mm] *
(Using the E39-R4)
100 mm [10 mm] *
(Using the E39-R37-CA)
Standard sensing object Opaque, 4-mm dia. min. Opaque, 5-mm dia. min. Opaque, 27-mm dia. min.
Minimum detectable object
(reference value)		 --- 2-mm dia. (Sensing
distance 100 mm)
Hysteresis (white paper) ---
Black/white error ---
Directional angle Receiver: 2° Receiver: 10° 2 to 20°
Light source (wavelength) Red LED (630 nm) Red LED (625 nm) Red LED (650 nm)
Power supply voltage 12 to 24 VDC ±10%, ripple (p-p) 10% max.
Current consumption 30 mA max. (Emitter 15 mA max., Receiver 15 mA
max.)		 20 mA max.
Control output Load power supply voltage: 30 VDC max.
Load current: 80 mA max.
(residual voltage: 1 V max.)
Open-collector output		 Load power supply voltage: 26.4
VDC max.
Load current: 50 mA max.
(residual voltage: 2 V max. for load
current of 10 to 50 mA, 1 V max.
for load current of less than 10 mA)
Open-collector output
Indicators Operation indicator (orange), Stability indicator (green)
Protection circuits Power supply reverse polarity protection,
Output short-circuit protection		 Power supply and control output
reverse polarity protection,
Output short-circuit protection,
Mutual interference prevention
Response time Operate or reset: 0.5 ms max. Operate or reset: 1 ms max.
Ambient illumination Incandescent lamp: 3,000 lx max. Incandescent lamp: 5,000 lx max.,
Sunlight: 10,000 lx max.
Ambient temperature range Operating: -25 to 55°C
Storage: -30 to 70°C
(with no icing or condensation)		 Operating: -25 to 55°C
Storage: -40 to 70°C
(with no icing or condensation)
Ambient humidity range Operating or Storage: 35% to 85%
(with no condensation)		 Operating: 35% to 85%
Storage: 35% to 95%
(with no condensation)
Insulation resistance 20 MΩ min. at 500 VDC
Dielectric strength AC500V, 50/60 Hz for 1 min. AC1,000V, 50/60 Hz for 1 min.
Vibration resistance
(destruction)		 10 to 55Hz, 1.5-mm double amplitude for 2 hours
each in X, Y, and Z directions		 10 to 2,000 Hz, 1.5-mm double
amplitude or 300 m/s2 for 0.5
hours each in X, Y, and Z directions
Shock resistance
(destruction)		 500 m/s2 3 times each in X, Y, and Z directions 1,000m/s2 3 times each in X, Y,
and Z directions
Degree of protection IEC 60529 IP65 IEC 60529 IP67
Connection method Pre-wired (standard length: 2 m)
Weight (packed state) Approx. 60 g Approx. 20 g
Materials Case SUS303 PBT (polybutylene terephthalate)
Display window Polysulfone Denatured polyarylate
Lens Polysulfone Methacrylc resin
Hexagonal nuts SUS303 ---
Toothed washers SUS303 ---
MTTFd (Year) 428 442 696
Accessories Instruction manual, Hexagonal nuts,
Toothed washers		 Instruction manual, Set screws
for mounting (M2×14), Nuts,
E39-R4 (E3T-SR4[] only),
E39-R37-CA (E3T-SR4[]-S only)

* Values in parentheses indicate the minimum required distance between the Sensor and Reflector.

Sensing method Diffuse-reflective
Appearance Rectangular type (Flat)
409_sp_3_1		 Cylindrical type (Top-view)
409_sp_3_2
NPN
output		 Light-ON E3T-FD11
E3T-FD11M		 E3T-CD11
Dark-ON E3T-FD12
E3T-FD12M		 ---
PNP
output		 Light-ON E3T-FD13
E3T-FD13M		 E3T-CD13
Dark-ON E3T-FD14
E3T-FD14M		 ---
Sensing distance 5 to 30 mm (50 × 50 mm white paper) 3 to 50 mm (100 × 100 mm white paper)
Standard sensing object ---
Minimum detectable object
(reference value)		 0.15-mm dia. (sensing distance 10 mm) ---
Hysteresis (white paper) 6 mm max. 15% or less of the sensing distance
Black/white error ---
Directional angle ---
Light source (wavelength) Red LED (650 nm) Infrared LED (870 nm)
Power supply voltage 12 to 24 VDC ±10%, ripple (p-p) 10% max.
Current consumption 20 mA max.
Control output Load power supply voltage: 26.4 VDC max.
Load current: 50 mA max. (residual
voltage: 2 V max. for load current of 10
to 50 mA, 1 V max. for load current of
less than 10 mA)
Open-collector output		 Load power supply voltage: 30 VDC max.
Load current: 80 mA max. (residual
voltage: 1 V max.)
Open-collector output
Indicators Operation indicator (orange), Stability indicator (green)
Protection circuits Power supply and control output reverse
polarity protection,
Output short-circuit protection,
Mutual interference prevention		 Power supply reverse polarity protection,
Output short-circuit protection
Response time Operate or reset: 1 ms max. Operate or reset: 0.5 ms max.
Ambient illumination Incandescent lamp: 5,000 lx max.,
Sunlight: 10,000 lx max.		 Incandescent lamp: 3,000 lx max.
Ambient temperature range Operating: -25 to 55°C
Storage: -40 to 70°C
(with no icing or condensation)		 Operating: -25 to 55°C
Storage: -30 to 70°C
(with no icing or condensation)
Ambient humidity range Operating: 35% to 85%
Storage: 35% to 95%
(with no condensation)		 Operating or Storage: 35% to 85%
(with no condensation)
Insulation resistance 20 MΩ min. at 500 VDC
Dielectric strength 1,000 VAC, 50/60 Hz for 1 min. 500 VAC, 50/60 Hz for min.
Vibration resistance
(destruction)		 10 to 2,000 Hz,
1.5-mm double amplitude or 300 m/s2 for
0.5 hours each in X, Y, and Z directions		 10 to 55Hz,
1.5-mm double amplitude for 2 hours each
in X, Y, and Z directions
Shock resistance
(destruction)		 1,000 m/s2 3 times each in X, Y, and Z
directions		 500 m/s2 3 times each in X, Y, and Z
directions
Degree of protection IEC 60529 IP67 IEC 60529 IP65
Connection method Pre-wired (standard length: 2 m)
Weight (packed state) Approx. 20 g Approx. 40 g
Materials Case PBT (polybutylene terephthalate) SUS303
Display window Denatured polyarylate Epoxy
Lens Denatured polyarylate Polysulfone
Hexagonal nuts --- SUS303
Toothed washers --- SUS303
MTTFd (Year) 696 494
Accessories Instruction manual, Set screws
for mounting (M2 × 8), Nuts *		 Instruction manual, Hexagonal nuts,
Toothed washers, Adjustment driver

* Only the Instruction Manual is included with an M3-mounting Sensor (E3T-FD[][]M or E3T-SL[][]M). Order the Set of
  Mounting Screws separately if required.

Sensing method Limited-reflective BGS-reflective
Appearance Rectangular type (Side-view)
409_sp_3_3		 Rectangular type (Flat)
409_sp_3_4
NPN
output		 Light-ON E3T-SL11
E3T-SL11M		 E3T-SL21
E3T-SL21M		 E3T-FL11 E3T-FL21
Dark-ON E3T-SL12
E3T-SL12M		 E3T-SL22
E3T-SL22M		 E3T-FL12 E3T-FL22
PNP
output		 Light-ON E3T-SL13
E3T-SL13M		 E3T-SL23
E3T-SL23M		 E3T-FL13 E3T-FL23
Dark-ON E3T-SL14
E3T-SL14M		 E3T-SL24
E3T-SL24M		 E3T-FL14 E3T-FL24
Sensing distance 5 to 15 mm
(50 × 50 mm white
paper)		 5 to 30 mm
(50 × 50 mm white
paper)		 1 to 15 mm
(50 × 50 mm white
paper)		 1 to 30 mm
(50 × 50 mm white
paper)
Standard sensing object ---
Minimum detectable object
(reference value)		 0.15-mm dia.
(sensing distance 10 mm)		 0.15-mm dia. non-glossy object
(sensing distance 10 mm)
Hysteresis (white paper) 2 mm max. 6 mm max. 0.5 mm max. 2 mm max.
Black/white error --- 15% max.
Directional angle ---
Light source (wavelength) Red LED (650 nm)
Power supply voltage 12 to 24 VDC ±10%, ripple (p-p) 10% max.
Current consumption 20 mA max.
Control output Load power supply voltage: 26.4 VDC max.
Load current: 50 mA max. (residual voltage: 2 V max. for load current of 10 to 50 mA,
1 V max. for load current of less than 10 mA)
Open-collector output
Indicators Operation indicator (orange), Stability indicator (green)
Protection circuits Power supply and control output reverse polarity protection,
Output short-circuit protection,
Mutual interference prevention
Response time Operate or reset: 1 ms max.
Ambient illumination Incandescent lamp: 5,000 lx max., Sunlight: 10,000 lx max.
Ambient temperature range Operating: -25 to 55°C
Storage: -40 to 70°C
(with no icing or condensation)
Ambient humidity range Operating: 35% to 85%
Storage: 35% to 95%
(with no condensation)
Insulation resistance 20 MΩ min. at 500 VDC
Dielectric strength 1,000 VAC, 50/60 Hz for 1 min.
Vibration resistance
(destruction)		 10 to 2,000 Hz, 1.5-mm double amplitude or 300 m/s2 for 0.5 hours each in X, Y, and
Z directions
Shock resistance
(destruction)		 1,000m/s2 3 times each in X, Y, and Z directions
Degree of protection IEC 60529 IP67
Connection method Pre-wired (standard length: 2 m)
Weight (packed state) Approx. 20 g
Materials Case PBT (polybutylene terephthalate)
Display window Denatured polyarylate
Lens Denatured polyarylate
Hexagonal nuts ---
Toothed washers ---
MTTFd (Year) 696 653
Accessories Instruction manual, Set screws for
mounting (M2 × 14), Nuts *		 Instruction manual, Set screws for
mounting (M2 × 8), Nuts

* Only the Instruction Manual is included with an M3-mounting Sensor (E3T-FD[][]M or E3T-SL[][]M). Order the Set of
  Mounting Screws separately if required.

last update: April 7, 2025

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