These special thru-beam sensors are used for checking fluid levels and detecting the level of liquids containing water. The particularly strong IR beam of the emitter penetrates not only transparent, but also semitransparent or coloured containers such as PFA packages or shampoo bottles. The sensitivity of the sensor is adjustable, which allows foam to be distinguished from liquid in drinks, for example.


  • Suitable for coloured and semitransparent containers or packages
  • Not affected by droplets, air bubbles or foam
  • Compact design
  • Short-circuit protected
  • Light ON/dark ON
  • Sealed to IP67
  • M8 plug-in or cable connection (-J)


Type NPN output PNP output
Model No. EZ-11 EZ-11-PN
CE marking directive compliance EMC Directive, RoHS Directive
Sensing range 5 m 16.404 ft (without container or pipe) (Note 2)
Sensing object ø12 mm ø0.472 mm or more liquid which contains water, or opaque object (Note 3)
Supply voltage 12 to 24 V DC ± 10 % Ripple P-P 10 % or less
Current consumption Emitter: 25 mA or less, Receiver: 25 mA or less
Output NPN open-collector transistor PNP open-collector transistor
・Maximum sink current: 100 mA ・Maximum source current: 100 mA
・Applied voltage: 30 V DC or less (between output and 0 V) ・Applied voltage: 30 V DC or less (between output and +V)
・Residual voltage: 1.5 V or less (at 100 mA sink current) ・Residual voltage: 1.5 V or less (at 100 mA source current)
0.4 V or less (at 16 mA sink current) 0.4 V or less (at 16 mA source current)
Utilization category DC-12 or DC-13
Output operation Switchable either Light-ON or Dark-ON
Response time 12 ms or less
Sensitivity adjuster Continuously variable adjuster
Pollution degree Pollution degree 3 (Industrial environment)
Protection IP67 (IEC)
Ambient temperature 0 to +55 ℃ +32 to +131 ℉ (No dew condensation allowed),
Storage: -30 to +70 ℃ -22 to +158 ℉
Ambient humidity 35 to 85 % RH, Storage: 35 to 85 % RH
Ambient illuminance Incandescent light: 3,000 ℓx or less at the light-receiving face
Voltage withstandability 1,000 V AC for one min. between all supply terminals connected together and enclosure
Insulation resistance 20 MΩ, or more, with 250 V DC megger between all supply terminals connected together and enclosure
Vibration resistance 10 to 500 Hz frequency, 3 mm 0.118 in double amplitude (20 G max.) in X, Y and Z directions for two hours each
Shock resistance 500 m/s2 acceleration (50 G approx.) in X, Y and Z directions three times each
Emitting element Infrared LED (modulated)
Material Polycarbonate
Net Weight Emitter: 45 g approx., Receiver: 50 g approx.
Accessory Adjusting screwdriver: 1 pc.
Dimensions W12 x H31 x D20 mm W0.472 x H1.221 x D0.787 in

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