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BE-A301P

Optical bubble liquid level sensor – Panasonic (BE-A For diameter 3mm tubes) – Length (Cable) 1m – Supply voltage (DC) 5-24V – Infrared (IR) LED (855nm) – With Orange LED (No liquid) indicator – 1 x PNP open-collector – Material Polyamide (Tube holder)

BE-A301P

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BE-A301P

BE-A301P Optical bubble liquid level sensor – Panasonic (BE-A For diameter 3mm tubes) – Length (Cable) 1m – Supply voltage (DC) 5-24V – Infrared (IR) LED (855nm) – With Orange LED (No liquid) indicator – 1 x PNP open-collector – Material Polyamide (Tube holder)

For small diameter tubes Optical Bubble Sensor BE-A

*Photo may vary from actual product.


  • BE-A301P Dimensions
Product Number BE-A301P

Part Number BE-A301P
Product For small diameter tubes Optical Bubble Sensor
Details for ø3 mm ø0.125 in tube
Product name For small diameter tubes Optical Bubble Sensor BE-A

As of September 07, 2017
Specifications and design of the products are subject to change without notice for the product improvement.

BE-A301P Spec Detail

Item Specifications
Product Number BE-A301P
Part Number BE-A301P
Detectable air gap 0.8 mm 0.032 in or more
(Note) Sensing air gap refers to the width of an air bubble formed in the entire area of the inner diameter of the tube. Please note that this product cannot sense very small air bubbles or water drops.
Sensing object Liquid
(Note) Sensing is affected by dirt or residues adhered to the inner wall of the tube. Please maintain the tube regularly.
Applicable tube dia. (OD×ID) ø3 mm × ø2 mm
ø1/8 in × ø1/16 in
(Note) When using a tube out of specifications or it doesn’t have a smooth surface, please test sensing on the actual machine before use.
Applicable tube type

Transparent resin tube (equivalent to PFA)

(Note) When using a tube out of specifications or it doesn’t have a smooth surface, please test sensing on the actual machine before use.

Supply voltage 5 to 24 V DC ±10 % Ripple P-P 10 % or less
Current consumption 15 mA or less
Output (Incorporated with 2 outputs) PNP open-collector transistor
•Maximum source current: 50 mA
•Applied voltage: 30 V DC or less (between output and + V)
•Residual voltage: 2 V or less (source current at 50 mA) 1 V or less (source current at 16 mA)
Output (Incorporated with 2 outputs):Output operation Switchable either Liquid-absent-ON or Liquid-present-ON
Output (Incorporated with 2 outputs):Short-circuit protection Incorporated
Response time:When detecting bubble 20 μs or less
(Note) Actual response time may differ from specification (typical example using applicable tube) due to dimension, light transmission or surface state of test tube in use.
Response time:When detecting liquid 80 μs or less
(Note) Actual response time may differ from specification (typical example using applicable tube) due to dimension, light transmission or surface state of test tube in use.
Operation indicator Orange LED (lights up with absent liquid)
Protection circuits Power supply reverse polarity protection , Output reverse polarity protection

 Environmental & Cable

Environmental resistance : Protection IP40 (IEC)
Environmental resistance : Ambient temperature -25 to +55 ℃ -13 to +131 ℉ (No dew condensation or icing allowed), Storage: -30 to +80 ℃ -22 to +176 ℉
(Note) Liquid being detected should also be kept within the rated ambient temperature range.
Environmental resistance : Ambient humidity 35 to 85 % RH, Storage: 35 to 85 % RH
Environmental resistance : Ambient illuminance Fluorescent light: 1,000 ℓx at the light-receiving face
Environmental resistance : Voltage withstandability 1,000 V AC for between one min. between all supply terminals connected together and enclosure
Environmental resistance : Insulation resistance 20 MΩ, or more, with 250 V DC megger between all supply terminals connected together and enclosure
Environmental resistance : Vibration resistance 10 to 150 Hz frequency, 0.75 mm 0.030 in double amplitude or maximum acceleration 49 m/s2, in X, Y and Z directions for two hours each
Environmental resistance : Shock resistance 100 m/s2 acceleration in X, Y, and Z directions three times each
Emitter element Infrared LED(Peak emission wavelength: 855 nm 0.034 mil, non-modulated)
Material Enclosure: PBT, Tube holder: Polyamide, Indicator: Polycarbonate
Cable 0.09 mm2 4-core cabtyre cable 1 m 3.280 ft
Cable extension Extension up to total 100 m 328.084 ft is possible with 0.3 mm2, or more, cable.
(Note)Confirm that the power supply voltage at the end of cable is more than 4.5 V when using an extension of over 20 m 65.167 ft.
Clamping torque 0.5N•m or less
Weight Net weight: 15 g approx., Gross weight: 25 g approx.
Compliant regulation EMC Directive compliance, RoHS Directive compliance

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