Cảm biến báo mức Princo Instruments L3522
PRINCO’s Level Sentry L3522 level controller is a microprocessor-based, RF impedance level switch. It incorporates Level Sentry, a unique feature that automatically, once every minute, performs a self-test for a potential circuit failure. In many installations, a point level controller could go for an extended period of time without ever being required to detect an alarm condition. Level Sentry ensures that when the unit is called upon, it will detect the alarm condition. • Level Sentry – Detects any circuit failure within 60 seconds, switches unit to alarm state, LED indicator turns red. • Universal – Wide range of point level applications. Detects the level of powders, granules, conductive or non-conductive liquids … even the sticky ones. • NULL-KOTE™ Circuitry – Negates effects of coating build-up. • High Sensitivity and Temperature Stability – For critical low response applications. • Designed to Survive – RF immune, vibration-proof, all circuit boards are conformally coated (tropicalized) for extra protection. • Easy-On Probe Connection – Automatically provides simple, fast installation and reliable operation without wires, connectors, or terminal strips. Simply screw probe into the housing. • Unique Status Indicator – Red / green LED shows presence or absence of material and also indicates power “on”. • Heavy Duty Relay – 2 sets of form C contacts rated at 5A, 115 Vac resistive contacts • High or Low Fail-Safe – Field selectable. • Wide Temperature Range – Standard process temperature: -300 to 500°F (-184 to 260°C). • ROLLOCK™ PROBES – No part of the probe can fall into the process or be blown from the mounting. No re-tightening of seals required. • Time-Delay – 0 to 30 second delay minimizes relay chatter • Ten-Year Warranty – The only level instruments available with this unique assurance of quality. Instrumentation designed with the user in mind • Water-based liquids • Acids • Hydrocarbons and solvents • Powders and granulars • Oils PRINCO’s High-Perform-X™ L3522 level controller gives you the optimum combination of reliability, sensitivity, features, and cost. Conformally coated electronics, NULL-KOTE™ circuitry, explosion-proof / weatherproof enclosures, ROLLOCK™ probe construction and our unique 10 Year Warranty mean the ultimate in reliability. Excellent sensitivity, coupled with stability of 1 picofarad over the entire operating range, gives you a true set and forget installation. L3522 controllers are used with NULL-KOTE™ probes, available in a wide variety of lengths and designs to fit every application. Princo, one of the pioneers of RF level sensing technology, has provided accurate, dependable, long lived service for thousands of applications in all types of industries, worldwide for more than 4 decades.