Contrinex Standard photoelectric sensors are ideal for general position- and presence-detection in almost any industry. Available in diffuse, reflex, through-beam and background-suppression (C23, M18) variants, their exceptional accuracy, reliability and affordability make them ideal for general position- and presence-sensing in almost any industry.

The Standard range offers an excellent choice of cubic sizes: 0507 (5 × 7 × 40 mm), C12 (13 × 21 × 7 mm), C23 (20 × 30 × 10 mm), 3030 (30 × 30 × 15 mm), 4040 (40 × 40 × 19 mm), 4050 (40 × 50 × 15 mm) and C55 (50 × 50 × 23 mm). Metric-threaded cylindrical sensors are also available in M12 and M18 variants, including some M18 types with ABS housings adapted for right-angle detection.

Standard C23 and metric-threaded cylindrical photoelectric sensors are compact IO-Link-enabled devices, ideal for smart factory applications. Equipped with tough ABS housings (C23, M18P) or robust metal bodies (M12M, M18M), they feature Contrinex’s exclusive ASIC technology, offering best-in-class sensing distances at highly competitive prices. Ecolab-approved versions are already a popular choice for process engineers in the food and beverage sector.

TECHNOLOGY

Diffuse

A diffuse-mode, or energetic-diffuse, photoelectric sensor is a reflective sensor, containing a transmitter and a receiver in a single housing. The sensor emits a focused light beam toward a distant target that acts as a reflector, returning part of the transmitted light to the sensor. The receiver detects the amount of light reflected by the target, triggering the sensor when the light intensity reaches a threshold value.

• Ideal for short sensing ranges and relatively easy targets
• Easy installation and alignment
• No separate reflector or receiver

Background-Suppression

Diffuse-mode photoelectric sensors with background suppression emit a focused light beam toward a distant target. Part of the beam is reflected from the target and returns to the sensor, striking a position-sensitive receiver. The receiver distinguishes between reflections from the target and reflections from background objects, only triggering the sensor when the signal reaches a value that corresponds to the preset target distance.

• Target size, color, shape and surface finish have little influence on sensing range
• Suitable for difficult targets (small, fast-moving, light background)
• No separate reflector or receiver

Reflex

A reflex, or reflective, photoelectric sensor contains a transmitter and a receiver in a single housing, and emits a pulsed, focused light beam through a polarization filter toward a distant reflector. Reflected light returns to the sensor, passing through a second filter before arriving at the receiver. When a target object interrupts the light beam, the receiver detects the reduced light intensity and triggers the sensor. Autocollimation of the light beam allows blind-zone suppression.

• Ideal for moderate sensing ranges
• Wiring required for just one emitter/receiver unit
• Separately mounted reflector

Through-beam

Contrinex through-beam photoelectric sensors are ideal for industrial applications where sensing components must be mounted some distance from the target area. Through-beam sensors utilize infrared, visible and laser light sources to detect targets, reliably and repeatably, at extended distances.

• Ideal for long sensing ranges
• Suitable for contaminated environments or highly reflective targets
• Separately mounted and wired receiver