General
Product type	inductive sensor
Application	food industry
Construction type	Threaded pipe
Thread	M30×1,5
Mounting	Concise
Rated switching distance	15 mm
Factor	1
Operating voltage	10–30 V DC
Switching frequency	0,75 kHz
Output function	Normally open contact (NO)
Output type	PNP
Connection	M12×1, plug
Housing material	Stainless steel 1.4404
Front cap	Liquid crystal polymer (LCP)
Ambient temperature	-40 to +100 °C
Degree of protection	IP69K
ATEX approval	Category II 3 G, Ex Zone 2; Category II 3 D, Ex Zone 22
Magnetic field resistant

The TURCK BI15U-EM30WD-AP6X-H1141/3GD is an inductive proximity sensor specifically designed for use in the food industry. It features a flush-mountable threaded tube housing with M30×1.5 thread, made of stainless steel 1.4404 (AISI 316L), ensuring high corrosion resistance and hygiene compatibility. The front cap is made of liquid crystal polymer (LCP), a material offering high mechanical strength and chemical resistance. The sensor is designed for operating voltages of 10 to 30 V DC and operates with a PNP output in normally open (NO) function. The switching frequency is 0.75 kHz, ensuring reliable and fast response to moving objects. The nominal switching distance is 15 mm, with a factor 1 for all metals, meaning the sensor achieves the full switching distance regardless of metal type. It is magnetically immune, so external magnetic fields do not affect its function.

Applications
This sensor is intended for use in the food industry, where high hygiene requirements and frequent cleaning cycles with acidic and alkaline cleaning agents are common. The construction ensures long-term protection against such chemicals. The high protection rating IP69K makes it suitable for extreme environmental conditions, including high-pressure cleaning and steam disinfection. The special double-lip seal prevents moisture and dirt from entering, enhancing reliability in continuous operation. The permanently legible type label, engraved by laser, allows easy identification even after long operating times.

Functions and Features in Detail
The sensor is designed as a 3-wire DC sensor, enabling clear separation of supply voltage, signal, and ground lines. The output is a PNP normally open switch, which closes an electrical contact when the switching distance is reached. Mounting is flush, allowing the sensor to be mounted flat on the surface, which is advantageous in hygienic installations. The operating voltage of 10 to 30 V DC covers a wide range of control systems. The ambient temperature range is from -40 °C to +100 °C, enabling use in climatically demanding environments.

Technology Explained Simply
The technology of the inductive sensor is based on the principle of electromagnetic induction. A high-frequency alternating current in the coil system generates an alternating magnetic field, which is disturbed when a metallic object approaches. This disturbance is detected and evaluated, triggering the switching action of the sensor. The factor 1 property means the sensor achieves the full switching distance of 15 mm regardless of metal type (e.g., steel, aluminum, copper). The magnetically immune design protects the sensor from interference by external magnetic fields, such as those from motors or transformers.

Compatibility and Accessories
The sensor is equipped with an M12×1 connector, enabling a secure and weather-resistant connection. The ATEX certification for Category II 3 G, Ex Zone 2 and Category II 3 D, Ex Zone 22 allows use in potentially explosive environments, provided the respective zone conditions are met. The IP69K protection rating makes it suitable for use in wet, dusty, or contaminated environments, particularly in food processing, pharmaceutical, or chemical industries.

Mounting and Installation
Mounting is flush using the M30×1.5 thread, allowing the sensor to be directly screwed into a matching hole. The LCP front cap is resistant to mechanical stress and chemical exposure. Wiring is done via the M12 connector, ensuring a secure and weather-resistant connection. Installation requires no special tools, as mounting is done via the thread. Positioning should ensure the switching distance of 15 mm is not exceeded to guarantee reliable switching function.

Operational Advantages
The sensor offers high reliability due to its robust construction from stainless steel and LCP, along with IP69K protection. Resistance to acidic and alkaline cleaning agents reduces maintenance and extends service life. The magnetically immune design protects against interference from external magnetic fields. The laser-engraved type label ensures permanent identification. The ATEX certification expands the application range to hazardous areas. The 3-wire DC technology enables clear signal transmission and is widely used in industry.