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Basic Information
Fits perfectly with applicable tube sizes!
Detects liquid and air bubbles without fail!
Features
Movie Library
One-touch attachment
Simply attach the sensor with your hand!
Hassle-free one-touch attachment without using tools!
Push down the tube into the sensor.*Tube: Equivalent to PFA
Stretch the tube and insert it into the sensor.* øø4 tube: Equivalent to flexible PVC
For small diameter tubes
For ø2 mm, ø3 mm, ø4 mm tubes
Perfect fit into applicable tubes without obstructing flow rate.
Compatible with tubes in inch size
High speed response time
High speed detection
0.8 mm 0.032 in air gaps are reliably detected by optical technology at a response time of 20 μs*.
Ideal for traceability of the analysis process.
※Refer to thespecificationsfor detection conditions, BE-A201(P) has a response time of 30 μs.
Ultra compact
Fingertip size
Allows for installation in a narrow space.
For a wide-range of power supply voltages
5 to 24 V DC compliant
Allows for direct power supply from PC board.
Built-in Amplifier
No requirement of sensitivity adjustment
Can be used immediately after installation by built-in amplifier.
Equipped with two outputs, Liquid-absent-ON and Liquid-present-ON.
Allows for close proximity attachment
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Applications
Liquid dispensing instrument
Analyzer
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Order guide
| Type | Appearance | Model No. | Output | Output operation |
|---|---|---|---|---|
| for ø2 mm ø0.078 in tube |
| BE-A201 | NPN open-collector transistor | Switchable either Liquid-absent-ON or Liquid-present-ON |
| BE-A201P | PNP open-collector transistor | |||
| for ø3 mm ø0.125 in tube |
| BE-A301 | NPN open-collector transistor | |
| BE-A301P | PNP open-collector transistor | |||
| for ø4 mm ø0.156 in tube |
| BE-A401 | NPN open-collector transistor | |
| BE-A401P | PNP open-collector transistor |
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Specifications
| Type | for ø2 mm ø0.078 in tube | for ø3 mm ø0.125 in tube | for ø4 mm ø0.156 in tube | ||
|---|---|---|---|---|---|
| Model No. | NPN output | BE-A201 | BE-A301 | BE-A401 | |
| PNP output | BE-A201P | BE-A301P | BE-A401P | ||
| Applicable regulations | CE Marking (EMC Directive, RoHS Directive), UKCA Marking (EMC Regulations, RoHS Regulations) | ||||
| Detectable air gap (Note 2) | 0.8 mm 0.032 in or more | ||||
| Sensing object | Liquid (Note 3) | ||||
| Applicable tube dia. (Note 4) | Outer dia. | ø2 mm ±0.2 mm ø0.078 in ±0.008 in | ø3 mm ±0.2 mm ø1/8 in ±0.008 in | ø4 mm ±0.15 mm ø5/32 in ±0.006 in | |
| Inner dia. | ø1 mm ±0.2 mm ø0.039 in ±0.008 in | ø2 mm ±0.2 mm ø1/16 in ±0.008 in | ø2.4 mm ±0.1 mm ø3/32 in ±0.004 in | ||
| Applicable tube type (Note 4) | Transparent resin tube (equivalent to PFA) | Transparent resin tube (equivalent to flexible PVC) | |||
| 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) | <NPN output type> NPN open-collector transistor •Maximum sink current: 50 mA •Applied voltage: 30 V DC or less (between output and 0 V) •Residual voltage: 2 V or less (sink current at 50 mA) 1 V or less (sink current at 16 mA) <PNP output type> 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 operation | Switchable either Liquid-absent-ON or Liquid-present-ON | ||||
| Short-circuit protection | Incorporated | ||||
| Response time (Note 5) | When detecting bubble | 30 μs or less | 20 μs or less | ||
| When detecting liquid | 80 μs or less | ||||
| Operation indicator | Orange LED (lights up with absent liquid) | ||||
| Protection circuits | Power supply reverse polarity protection , Output reverse polarity protection | ||||
| Environmental resistance | Protection | IP40 (IEC) | |||
| Ambient temperature (Note 6) | -25 to +55 ℃ -13 to +131 ℉ (No dew condensation or icing allowed), Storage: -30 to +80 ℃ -22 to +176 ℉ | ||||
| Ambient humidity | 35 to 85 % RH, Storage: 35 to 85 % RH | ||||
| Ambient illuminance | Fluorescent light: 1,000 ℓx at the light-receiving face | ||||
| Voltage withstandability | 1,000 V AC for between 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 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 | ||||
| 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 (Note 7) | Extension up to total 100 m 328.084 ft is possible with 0.3 mm2, or more, cable. | ||||
| Clamping torque | 0.5N•m or less | ||||
| Weight | Net weight: 15 g approx., Gross weight: 25 g approx. | ||||
Notes:
1)Where measurement conditions have not been specified precisely, the conditions used were an ambient temperature of +23 ℃ +73.4 ℉.
2)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. Refer to the figure 1 and 2.
3)Sensing is affected by dirt or residues adhered to the inner wall of the tube. Please maintain the tube regularly.
4)When using a tube out of specifications or it doesn't have a smooth surface, please test sensing on the actual machine before use.
5)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.
6)Liquid being detected should also be kept within the rated ambient temperature range.
7)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.
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Dimensions
- Unit: mm in
BE-A201(P)
For ø2 mm ø0.078 in tube
BE-A301(P)
For ø3 mm ø0.125 in tube
BE-A401(P)
For ø4 mm ø0.156 in tube
