Balluff BOS00K3 Photoelectric Sensor

(Código de pedido completo: BOS 18KF-PA-1QD-S4-C)

Tipo: M18 cylindrical retroreflective sensor fotoeléctrico with transparent object detection capability

🔹 Core Technical Specifications

fuente de luz: Red LED with polarizing filter

Rango de detección: 0～4.5 m (requires reflector)

Tensión de alimentación: 10~30 VCC

Producción: PNP, switchable NO / CAROLINA DEL NORTE (normalmente abierto / normalmente cerrado)

Conexión: Conector macho M12×1 de 4 pines

Mechanical dimension: M18 threaded cylinder, Φ18 × 81.5 milímetros

Material de la carcasa: plástico PBT; ventana óptica: PMMA

Certificaciones: CE, Reino Unido, cULus

Peso: Aprox.. 33.3 gramo

Código HS: 85365019

🔹 Key Features

Detección de objetos transparentes: Reliably detects transparent films, glass bottles and clear plastic parts-this is the core advantage of this model.
Straight flat optical window, fits standard M18 mounting holes.
Visible status LED on the side for easy on-site commissioning.
Red light with clear light spot, simple alignment with the reflector.

🔹 Typical Applications

Transparent material inspection on packaging lines, glass bottle detection, transparent film break monitoring, workpiece counting on conveyor lines, position confirmation in material handling & logistics systems.

🔹 Accessories & Opciones de reemplazo

Must be used with a retroreflector (retroreflective principle; cannot detect targets without a reflector).

Interchangeable variants within the BOS 18KF series (different cable types, NPN output or IO-Link versions).

Alternativas domésticas: M18 retroreflective photoelectric sensors with transparent detection function; verificar 4.5 rango m, PNP output and transparent sensing performance before replacement.

🔹 Pin Assignment (M12 4-pin Connector)

1: Brown-DC+

2: Black-Switching output

3: Blue-DC 0V (Tierra)

4: White-NO/NC function switching

White wire open-circuit = NO (por defecto); white wire connected to GND = NC.

BOS00K3 (BOS 18KF-PA-1QD-S4-C) Puesta en servicio & Guía de solución de problemas

Principio de funcionamiento: Retroreflective photoelectric sensor optimized for transparent object detection. A reflector is mandatory; it does not work as a diffuse sensor.

Procedimiento de puesta en marcha in situ (follow step by step)
Wiring Check

M12 4-pin pinout:

1 Marrón: DC+ 10~30V

3 Azul: CC 0 V

2 Negro: salida PNP

4 Blanco: NO/NC switching

Alambre blanco flotante: NO; white wire shorted to GND: CAROLINA DEL NORTE

Never short positive and negative terminals; supply voltage must not exceed 30 VCC.

Montaje & Selección de reflector

Recomendado original balluff reflectors: BOS-R10, BOS-R20. Generic reflectors work but reduce stability for transparent targets.

Keep the sensor face parallel to the reflector; deflection angle < 5°.

Keep operating distance between 0.3~4 m; avoid the full 4.5 m maximum range, leave 10% safety margin for stable operation.

Transparent workpieces must pass directly through the light beam between sensor and reflector; avoid oblique beam occlusion.

Beam Alignment

Power on and slowly adjust the sensor angle until the green LED stays steadily lit (receiving reflected light from the reflector).

Insert the transparent workpiece into the beam: green LED turns off (signal triggered). Remove the workpiece, green LED lights up again.

Center the red light spot on the reflector for best anti-interference performance.

Environmental Notes (critical for transparent detection)

Detection stability varies with material thickness and refractive index: thick glass bottles are easier to detect than thin PET films.

Condensation, oil stains or scratches on transparent surfaces will easily cause missed detections.

Avoid direct strong sunlight or high-bay lighting shining onto the optical window.

Fallos comunes, Causas & Soluciones

Fenómeno de falla	Causa principal	Recurso
Green LED never lights up after power-on (sin luz de retorno)	① Power polarity reversed; ② Reflector dirty/missing; ③ Misaligned angle; ④ Supply voltage below 10 VCC; ⑤ Dirty optical lens	Check positive/negative wiring; clean or replace reflector; re-align beam; medir el voltaje de suministro; wipe the sensor window
LED keeps on even when transparent workpiece blocks the beam	① The beam is not fully blocked by the transparent part; ② The film is ultra-thin with very low light attenuation; ③ The reflector is too close; ④ Ambient stray light interference	Adjust beam position to ensure full occlusion; shorten sensing distance; add anti-glare shielding; switch to polarized reflector
Random signal flicker / false triggering	① Lens or reflector contaminated with dust/oil; ② Vibration causing angle drift; ③ Shiny surrounding surfaces reflecting light back; ④ Voltage fluctuation	Regularly clean optical surfaces; lock the sensor mounting nut; install polarizing filter; stabilize the power supply

Full Model List-BOS 18KF Series (Balluff M18 Straight-Body Photoelectric Sensors)

Retroreflective Type (Transparent Detection Models-Main Series)

1) Cable & Connector Versions (0~4.5 m, luz roja, detección transparente)

BOS00K2

Modelo: BOS 18KF-PA-1QD-C-02

Conexión: 2 m fixed PVC cable; PNP NA/NC conmutable; detección transparente; rango 4.5 metro.

BOS00K3 (Your current model)

Modelo: BOS 18KF-PA-1QD-S4-C

Conexión: Conector M12 de 4 pines; PNP NA/NC conmutable; detección transparente; rango 4.5 metro.

NPN equivalent: BOS 18KF-NA-1QD-S4-C (Número de pedido. BOS00K4).
IO-Link intelligent version: BOS 18KF-PA-1QD-S4-IL (adjustable threshold via IO-Link).

Summary of differences:

do-02 = 2 m cable fijo; S4-C = M12 4-pin connector

PA = PNP output; NA = NPN output; 1QD = retroreflective + detección transparente (4.5 metro).