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BE-A optical bubble sensor

Sensor for air bubble detection.

General

The BE-A series features optical bubble sensors in a miniaturized shape that are suitable for many applications. The series comprises three different models for different tube diameters (2mm, 3mm, and 4mm). Mounting the sensors is very simple and does not require any tools: Simply push the tube into the opening in the sensor. The tubes fit perfectly without the sensor obstructing the flow rate. In addition, the sensors are compatible with tubes in inch size.

Characteristics:

  • Hassle-free one-touch attachment without using tools
  • Highly accurate detection of air gaps of min. 0.8mm
  • 20µs response time
  • Built-in amplifier
  • Installation possible even when space is limited (staggered or parallel mounting)
  • Suitable for transparent resin tubes made from PFA or similar material

Specifications

NPN output BE-A201 BE-A301 BE-A401
PNP output BE-A201P BE-A301P BE-A401P
Sensor type For a tube diameter of ø2mm For a tube diameter of ø3mm For a tube diameter of ø4mm
Detectable air gap Min. 0.8mm
Object to be sensed Liquid
Applicable tube diameter (outer x inner diameter) ø2mm x ø1mm ø3mm x ø2mm ø4mm x ø2.4mm
Applicable tube type Transparent resin tube (equivalent to PFA) Transparent resin tube (equivalent to flexible PVC)
Supply voltage 5 to 24V, DC ±10% including ripple max. 10% (P-P)
Current consumption Max. 15mA
Output (equipped with 2 outputs) NPN open collector transistor
  • Sink current: max. 50mA
  • Applied voltage: max. 30V DC (between output and 0V)
  • Residual voltage: max. 2V (sink current at 50mA), max. 1V (sink current at 16mA)

PNP open-collector transistor

  • Source current: max. 50mA
  • Applied voltage: max. 30V DC (between output and +V)
  • Residual voltage: max. 2V (source current at 50mA), max. 1V (source current at 16mA)
Output operation Switchable. Either Liquid-absent-ON or Liquid-present-ON
Short-circuit protection Built in
Response time when detecting bubbles Max. 30μs Max. 20μs
Response time when detecting liquids Max. 80μs
Operation indicator Orange LED (lights up when there is no liquid)
Protection circuits Power supply reverse polarity protection, output reverse polarity protection
Degree of protection IP40 (IEC)
Ambient temperature -25 to +55°C (no dew condensation or icing allowed), storage: -30 to +80°C (the specified temperature ranges also apply to the liquid to be detected)
Ambient humidity 35 to 85% RH, at storage: 35 to 85% RH
Ambient light Fluorescent light: 1,000ℓx at the light-receiving side
Voltage withstandability 1,000V, AC for one min. between all supply terminals connected together and enclosure
Insulation resistance Min. 20MΩ with 250V DC megger between all supply terminals connected together and enclosure
Vibration resistance 10 to 150Hz frequency, 0.75mm double amplitude in X, Y and Z directions for two hours each (maximum acceleration 49m/s2)
Shock resistance 100m/s2 acceleration in X, Y, and Z directions three times each
Light emitting element Infrared LED (peak emission wavelength: 855nm, non-modulated)
Material Enclosure: PBT, tube holder: Polyamide, indicator: Polycarbonate
Cable 0.09mm2 4-core cab tire cable, 1m
Cable extension Extension up to a total length of 100m is possible using a cable with a diameter of min. 0.3mm2.
Clamping torque Max. 0.5N•m
Weight Net weight: approx. 15g, gross weight: approx. 25g
Conformity Compliant with EMC Directive and RoHS Directive

Order Guide

Type Model number Output Output operation
For a tube diameter of ø2mm BE-A201 NPN open collector transistor Switchable. Either Liquid-absent-ON or Liquid-present-ON
BE-A201P PNP open-collector transistor
For a tube diameter of ø3mm BE-A301 NPN open collector transistor
BE-A301P PNP open-collector transistor
For a tube diameter of ø4mm BE-A401 NPN open collector transistor
BE-A401P PNP open-collector transistor

Typical applications

BE-A optical bubble sensor applications
  • Detecting air bubbles before dispensing liquids
  • Liquid level and bubble detection for the laboratory and medical technology industry

Downloads

Name File Type Size 1 Date Language
ZIP BE-A 2D Data CAD 42.9 KB
ZIP BE-A 3D Data CAD 1.6 MB
PDF Data sheet BE-A Data sheet 653.4 KB English
PDF Data sheet BE-A (JP) Data sheet 2.9 MB 03.03.2016 English
PDF Datenblatt BE-A Data sheet 665.5 KB German
Raccolta Applicazioni Sensori Data sheet 24.2 KB 20.12.2018 Italian
PDF Solutions for Liquid Dispensing Processes, for Clinical Diagnostics Instruments Data sheet 2.4 MB 01.11.2019 English

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