Feature:Control various automatic industrial control equipment, flashing lights, buzzers, relays, single-chip microcomputers or other power load equipment. It is widely used in substations, variable frequency speed regulation devices, frequency converter devices, electrolytic plating, electric locomotives, street lamp monitoring, coal mines and other automation industries that require current monitoring. Compared with traditional transformers and thermal protectors, it has the advantages of high accuracy, stable performance and long service life. Using the principle of electromagnetic mutual inductance of current, it adopts advanced switch output detection, monitoring and protection alarm products without power supply technology. Ideal for automatic industrial control equipment and power monitoring. Current sensing switches are used to safely and conveniently monitor or detect the current of electrical equipment. Specifications:Switch type: BEMA36KNOnormally open/BEMA36KNCnormally closed OptionalPower supply: self-powered, no external power supply required. Starting current/frequency range: 0.2-30A, 40-400HzStart-up time: lt; 0.1 secondSwitch capacity: Maximum: 0.5A12-240VAC/DCOverload capacity: + 100% 30ADiameter of threading hole: 9mmIndicator light: red and greenInstallation form: flat installationShell material: fireproof ABSWorking temperature: -20-55CWorking humidity: 0-90%, no condensationProtection level: IP30Dimensions: 46 x 65 x 25mm / 1.81 x 2.56 x 0.98 inchesPackage Included:1 * Sensor switchNote:Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Manual measurement, please allow 1-10mm error. Thanks for your understanding.