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Discontinued On Mar. 2016


Ultrasonic Proximity Sensor


Capable of Setting the Sensing Range Using an Ultrasonic Beam

* Information in this page is a reference that you created on the basis of information in the product catalog before the end of production, may be different from the current situation, such as goods for / supported standards options / price / features of the product. Before using, please check the compatibility and safety system.

Model E4B-TS50E4 E4B-T1E4 E4B-LS20E4 E4B-LS70E4 E4B-RS70E4
Sensing method Through-beam Convergent reflective
reflective zone
Sensing distance 50 cm 1 m 5 to 20 cm 20 to 60 cm
(20 to 70 cm)
20 to 60 cm
(20 to 70 cm)
*1 (in 10-cm
Supply voltage 12 to 24 VDC ± 10% (10.8 to 26.4 VDC) with a max. ripple ±10% (p-p)
12 VDC Emitter: 155 mA max.
Receiver: 30 mA max.
Emitter: 70 mA max.
Receiver: 30 mA max.
100 mA max.
24 VDC Emitter: 80 mA max.
Receiver: 30 mA max.
Emitter: 50 mA max.
Receiver: 30 mA max.
50 mA max.
Standard sensing
10 x 10 cm flat plate 4 x 4 cm flat plate
Differential travel --- 20% max. of sensing
3 cm max.
Directional angle *2 ±8° max.
Ultrasonic oscillation
Approx. 200 kHz
Response frequency *4 50 Hz 10 Hz 50 Hz 20 Hz
Operating mode Incident or interrupted (selectable)
Control output NPN, 100 mA at 30 VDC (with a residual voltage of 1.5 V max.) and an output resistance of
4.7 kΩ
Indicators SENSING indicator (red LED) and STABILITY indicator (green LED)
Ultrasonic speed
No Yes
Ambient temperature Operating: -10°C to 55°C
Ambient humidity Operating: 35% to 95%
Temperature influence ±10% max. of sensing distance at 20°C in the temperature range of -10°C and 55°C
Voltage influence ±5% max. of sensing distance at a voltage between 90% and 110% of the rated power
supply voltage
Residual voltage 1.5 V max. under a load current of 100 mA and a cord length of 2 m
Insulation resistance 20 MΩ min. (at 500 VDC) between current carry parts and case
Dielectric strength 1,000 V (50/60 Hz) for 1 min between current carry parts and case
Vibration resistance Destruction: 10 to 55 Hz, 1.5-mm double amplitude for 2 hours each in X, Y, and Z directions
Shock resistance Destruction: 500 m/s2 (approx. 50G) 3 times each in X, Y, and Z directions.
Degree of protection *3 IEC IP66 (JEM IP66 water resistive)
Weight (with 2-m-long
cord and Mounting
Approx. 600 g (with Emitter and Receiver) Approx. 300 g
*1. These are the available sensing distances at an ambient temperature range between 0°C and 45°C.
*2. This is the half-value angle obtainable at a signal of –6 dB.
*3. The enclosure rating indicates the degree of protection of the case, which will depend on the operating condition.
*4. The response frequencies are values obtained with the E4B used for detecting a rotating propeller-shaped disc as
       shown on the right.

E4B Specifications 1