The Leuze LS55CI.H2O/77-200-M12 (Part No.: 50148183) is a specialized throughbeam photoelectric sensor transmitter belonging to the renowned Series 55C Wash-Down line by Leuze electronic (Germany). Engineered with cutting-edge optical technology, it emits an infrared light beam at a dedicated wavelength of 1,450 nm. Because this specific wavelength is heavily absorbed by water molecules and aqueous solutions, the sensor provides outstanding detection reliability for water-based liquids, fill-level verification, and presence checks inside transparent glass or plastic containers where standard optical sensors frequently fail.

Constructed specifically for demanding hygienic environments, the sensor features a heavy-duty housing made of AISI 316L stainless steel (DIN X2CrNiMo17132 / W.No 1.4404) with an ultra-smooth surface roughness of Ra ≤ 0.8 µm. This design effectively prevents bacterial buildup, microbiological deposits, and food residues. The optical lens cover is made from PMMA+ reinforced with a scratch-resistant Indium protective coating, ensuring maximum resistance against aggressive industrial chemical cleaners certified by ECOLAB and CleanProof+.

With superior ingress ratings of IP67, IP68, and IP69K, the unit effortlessly withstands high-pressure, high-temperature washdown procedures (CIP/SIP). Equipped with a 200 mm cable terminating in a standard 4-pin M12 connector (A-coded), it delivers robust, long-lasting performance and easy integration across automated packaging, filling, and bottling lines in Food & Beverage, Pharmaceutical, and Chemical industries.

• Manufacturer: Leuze electronic (Germany)
• Series: Series 55C Wash-Down
• Model: LS55CI.H2O/77-200-M12
• Part Number: 50148183
• Device Type: Throughbeam photoelectric sensor transmitter
• Special Application: Water and aqueous liquid detection
• Light Source: Infrared LED
• Optical Wavelength: 1,450 nm (Pulsed)
• LED Risk Group: Exempt group (acc. to EN 62471)
• Operating Range (Guaranteed): 0 ... 64 m
• Operating Range Limit (Typical): 0 ... 80 m
• Application Operating Range (Liquid detection): 0 ... 500 mm
• Readiness Delay: 300 ms
• Supply Voltage: 10 ... 30 V DC
• Housing Material: Stainless steel AISI 316L (DIN X2CrNiMo17132, W.No 1.4404)
• Housing Roughness: Ra ≤ 0.8 µm
• Lens Cover Material: Plastic PMMA+ with scratch-resistant Indium coating
• Ingress Protection: IP67, IP68, IP69K
• Chemical Resistance Approvals: ECOLAB, CleanProof+, Johnson Diversey
• Connection Type: Cable with M12 connector, 4-pin (A-coded), length 200 mm
• Dimensions (W x H x L): 14 mm x 35.4 mm x 25 mm
• Operating Temperature: -40 °C ... +65 °C (up to 70 °C for ≤ 15 min)
• Net Weight: 59 g
• Standards & Certifications: c UL US, IEC 60947-5-2