Liquid Level Sensor E2K-L Installation on pipes. Sensing by means electrostatic capacity and is not influenced by the color of the pipe or liquid. Available in 8 to 11 mm dia. and 12 to 26 mm dia. models to enable sensing for a wide range of pipe diameters. Built-in amplifier for space-saving. Applications Liquid surface level detection Ordering Information Sensor type Applicable pipe diameters Shape Output form Model 8 to 11 mm dia. E2K-L13MC1 Electrostatic NPN open-collector out- NO capacity method put 12 to 26 mm dia. E2K-L26MC1 E2K-L D-203 E2K-LRating/Performance Item Model E2K-L13MC1 E2K-L26MC1 Material Non-metal External 8 to 11 mm dia. 12 to 26 mm dia. Applicable pipes diameter Size Wall 1 mm max. 1.5 mm max. thickness Sensing object Liquid (see note) Repetition precision 0.2 mm max. Response difference 0.6 to 5 mm 0.3 to 3 mm (reference value only varies with pipe size and solution) Supply voltage 12 to 24 VDC, 10% max. ripple (10.8 to 30 VDC) (operating voltage range) Current consumption 12 mA max. Switching 100 mA max. capacity Control output Residual 1 V max. (under load current of 100 mA with cable length of 2 m) voltage Detection position of liquid surface Notch position (For details, refer to Sensitivity Adjustment on next page.) Indicator lamp Operation indicator (orange) Ambient temperature Operating: 0 to 55C Storage: -10 to 65C (with no icing or condensation) Ambient humidity Operating/storage: 25% to 85% (with no condensation) In the range 0 to 55C: Detection level at 23C 4 mm (with distilled water or 20 % salt water con- Temperature influence centration) (6 mm with E2K-L13MC1 for distilled water in pipe of 8 mm diameter) Voltage influence At the rated power supply voltage 10%: Detection level at rated supply voltage 0.5 mm Insulation resistance 50 M min. (at 500 VDC) between energized parts and case Dielectric strength 500 VAC 50/60 Hz for 1 min between energized part and case Vibration resistance 10 to 55 Hz, 1.5 mm double amplitude for 2 hours each in X, Y, and Z directions 2 Shock resistance 500 m/s for 3 times each in X, Y, and Z directions Protective structure IEC 60529 IP66 Connection method Pre-wired models (standard length: 2 m) Weight (Packed state) Approx. 70 g Case, cover Heat-resistant ABS resin Material Cable clamp NBR Accessories 2 binding bands, 4 nonskid tubes, instruction manual Note: In the following cases, stable detection may not be possible and ensure to confirm correct operation in the actual installation before use. 1 .If the dielectric constant or conductivity of the liquid is low. 2 .If the capacity of the liquid is small, or if the pipe diameter is so small or the pipe walls are so thick that the amount by which the capacity changes relating to the liquid level is small. 3 .In case of an increased gassing or a highly viscous liquid firm residue on the inside walls of the pipe, or a dirt clogging on the inner or outer walls of the pipe. D-204 Capacitive Sensors