Level Sensing Relay IL 9151 . Level monitoring and control for conductive liquids and powders, e.g. maximum and minimum filling levels, overfilling and protection against dry running . Monitoring and control of the mixing ratio of conductive liquids . General resistance monitoring tasks, e.g. limit temperature detection with PTC . Contact protection relay with time delay Features . According to IEC/EN 60255-1 . 3 probe connections for 2-point and 1-point level control . Also for use as moisture detector . High interference resistance of the Measuring Circuit, which is isolated from the mains . Max. wire length to the probes: 3000 m . Large setting range: 2 ... 450 kΩ this permits differentiation between fluid and foam . Separately adjustable response and release time delay 0.2 ... 20 s for MIN- and MAX-level . Programmable for: - 2 separate controllable output relays for MIN and MAX level - Common controlled output relays for 2-point hysteresis level control - Open circuit operation - Closed circuit operation . Measuring Circuit for probes works with internally generated AC voltage (approx. 30 Hz), electrolytic behaviour does not occur in the liquid . For auxiliary voltages of 24 ... 415 V AC or 24 V DC . LEDs for operation and state of contact . 2 changeover relays with 1 changeover contact each . IL 9151 and SL 9151 with safe separation according to IEC/EN 61140, IEC/EN 60947-1 . Devices available in 3 enclosure versions: IL 9151: Depth 59 mm, with terminals at the bottom for installation systems and industrial distribution systems according to DIN 43880 SL 9151, MK 9151N: Depth 98 mm, with terminals at the top for cabinets with mounting plate and cable duct . IL/SL 9151: 35 mm width MK 9151N: 22.5 mm width Technical specifications Width: 35mm Operate delay: Yes Enclosure design: Distribution board Measuring range max.: 450 kΩ Output contacts: 2 x 1 C/O contacts Auxiliary voltage: AC, DC Classification: Füllstandsüberwachung Type: IL 9151 Manufacturer: E. Dold & Söhne GmbH & Co. KG Type: IL9151.12 2-450K-OHM AC230V 0,2-20S Art. No.: 0049135