33C/ 35C series
Robust and hygienic: On the safe side with stainless steel sensors
Largest selection of photoelectric sensors in stainless steel housings
To ensure stable and economical production and packaging processes, the sensors used in the system must function reliably and be available in the long term. In hygiene-sensitive or wet environments, as well as in a harsh production environment, sensors in stainless steel housings are the perfect choice. They are characterized by high resistance to moisture, cleaning agents, temperature fluctuations, dust, chips or vibrations, as well as mechanical loads.
Discover our new sensor portfolio of the 33C series in hygienic design and the 35C series in robust wash-down design. The two full series in stainless steel housings with photoelectric proximity sensors, through-beam and retro-reflective photoelectric sensors also include many specialized sensors for particularly demanding applications. With the extensive portfolio with different light sources (Power PinPoint® LED, laser, infrared), light spot geometries and connection types, applications in packaging systems, in machine tools or in the automotive industry can be solved reliably and economically.
33C series: Specialist for hygienic processes in the food industry
35C series: Robust all-rounder for packaging processes, the automotive industry and for machine tools
Highlights
Stainless steel sensors: problem solvers for demanding environmental conditions
"In industry, we often see sensors with plastic housings installed in harsh environmental conditions. To ensure that they can withstand the high hygiene standards or the mechanical requirements, they are protected with a specially manufactured and structurally complex stainless steel enclosure. This is not necessary with our sensors in stainless steel housings – which saves money and effort during installation,” says Heidi Wacker, product manager at Leuze.
Harsh environments require perfectly matched solutions
Your requirements for machines and systems, as well as the appropriate sensor technology, are high: Our sensors offer you perfectly matched solutions.
Impermeability
Systems and the sensors installed in them are very often cleaned with high-pressure cleaners. Sensors are constantly exposed to moisture and humidity due to the high number of cleaning cycles.
- Absolutely sealed housing
- Diffusion-tight materials for optical covers and operating elements
- protection classes IP 67, IP 68 and IP 69K
Chemical requirements
Regular cleaning cycles with foam cleaners, disinfectants, alkaline or basic cleaners require resistant sensors.
- ECOLAB certification
- Diversey certification
- Clean Proof+-certification
Thermal requirements
Strong temperature fluctuations between ambient temperature and cleaning temperature put a high load on sensors.
- Sensor tests in the climate cabinet
- Thermal shock tests (water bath hot-cold)
- Steam jet test as part of the IP 69K approval
- Temperature ranges from -40 °C to +70 °C
Mechanical resistance
In harsh production environments, sensors are exposed to dust, shavings, vibrations and other mechanical stresses.
- Absolutely sealed housing
- Robust housing: no additional housing necessary
- Vibration and shock resistance
To the point: Power PinPoint® LED
Everything from a single source: connection cables, mounting parts and reflectors
In demanding environments, not only the sensors but also the connection cables, mounting parts and reflectors must meet the high requirements. Our connection cables are approved for direct contact with food (FDA-compliant materials). The cables achieve the IP 69K degree of protection and thus withstand intensive cleaning processes with high-pressure cleaners (important: must be installed with a special tightening torque). ECOLAB certification confirms the cables' resistance to aggressive cleaning agents. The cable portfolio for use in hygienically demanding industrial areas includes M8 and M12 as well as cable lengths of 2, 5 and 10 meters.
Reflectors
Just how reliably retro-reflective photoelectric sensors can detect depends upon the selected reflector, among other things. We offer reflectors with plastic or stainless steel housings as well as reflective tapes for different requirements: Reflectors in the advanced segment are often used in the food and pharmaceutical industry on account of their resistance against cleaning agents. The Solidchem reflectors made of chemically resistant plastic also stand out for their high temperature resistance. The reflectors from the extended segment are suitable for production areas with high air humidity or large differences in temperature.
Applications
The 33C and 35C sensor series are designed to cover a wide range of applications in food packaging. Using stainless steel sensors in process steps reduces the complexity of the system and ensures that you are always on the safe side. In packaging areas where products are still unpackaged, the 33C series sensors are a reliable solution. The 35C series variants are suitable as robust all-rounders that can withstand intensive cleaning cycles and mechanical loads. Light scanners, through-beam photoelectric sensors and reflection light barriers are available in both series. The range is complemented by special operating principles designed for the food packaging industry.
Detection of boxes in food conveyor technology
Requirement:
Solution:
Detection of products through a film
Requirement:
Solution:
The LS35CI.XXR super power through-beam photoelectric sensor radiates even metallized films and reliably detects the front edges of the objects inside. This ensures that the seal is always applied in the correct place. The stainless steel sensors are completely watertight and certified according to ECOLAB, Diversey and CleanProof+.
Detecting interrupted objects
Requirement:
Solution:
Detection of unpackaged products on conveyor belts
Requirement:
Solution:
The DRT35C dynamic reference sensor detects any products by using the conveyor belt as a reference. The sensor, with a high-quality stainless steel housing with smooth surfaces (typical value ≤ 0.8 Ra), is the perfect solution for mounting above open food. Thanks to the stainless steel housing, no additional sensor enclosure is required.
Detection of unpackaged baked goods on the conveyor belt
Requirement:
Solution:
The PRK 35C photoelectric reflex switch is designed for this detection task and also reliably detects shiny objects. The high-quality stainless steel housing is robust against mechanical loads and withstands intensive cleaning cycles.
Detecting bottles in an aseptic filling system
Requirement:
Solution:
The PRK33C.PPTT3 photoelectric reflex switch has been developed for the detection of transparent objects. The stainless steel sensor in hygienic design is an optimal choice for the detection of transparent bottles in aseptic filling and for other sterile production environments in the food and pharmaceutical industry. A particularly smooth housing without mounting holes prevents deposits. The sensor is mounted gas-tight using a mounting spigot.
Detecting the carton feed
Requirement:
Solution:
The precisely adjustable HT 35C.PP light scanners with background suppression are optimally suited for the position and presence check. The Power PinPoint® LED technology ensures a high level of precision in stack detection: The size of the homogeneous light spot is constant over the entire operating range of the sensor.
Presence check for controlling the gripper robot in the automotive industry
Requirement:
Solution:
The PRK35C retro-reflective photoelectric sensors with Power PinPoint® LED feature a high function reserve and easy commissioning. They also detect shiny objects very reliably. Robust stainless steel sensors are an optimal choice in this harsh production environment.
Presence control
Requirement:
Solution:
The LS35C through-beam photoelectric switch with Power PinPoint® LED ensures precise detection of the metal plates. The rugged and shock-resistant stainless steel housing is particularly resistant to the harsh environmental conditions in the metal industry and to mechanical loads.