Sensing method		Through-beam		Retro-reflective (without M.S.R. function)
Appearance		Cylindrical type (Top-view)	Cylindrical type (Side-view)	Rectangular type (Side-view)
NPN output	Light-ON	—	—	E3T-SR41
NPN output	Dark-ON	E3T-CT12	E3T-CT22S	E3T-SR42
PNP output	Light-ON	—	—	E3T-SR43
PNP output	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		—
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)