Low oil detector with automatic reset

摘要: An optical liquid level sensor for distinguishing between the presence of oil and vapor within a compressor crankcase. The has light transmitting window positioned to interface crankcase interior planar side facing exterior. A source are both adjacent exterior face window. first condition when prismatic is immersed in second vapor. electronic circuit having dual MOSFET switch alternating current mounted sensor. provides power monitors When condition, closes switch. detects starts timer continuously tests If detected, resets its initial value. continues full time period, opens On opening switch, returns external provided manually reset value cause close period.