Providing direct measurement of level and temperature, hazardous location-certified Model 2100 Digital Level Sensor (DLS) with High Level Shut-In (HLS) helps operators with production storage tanks meet Category 3, API STD 2350 requirements while mitigating risk of environmental exposure to petrochemicals. Sensing technology ensures measurement of up to 2 levels and 8 temperature measurements in same tank, and dedicated safety circuit ensures high and high-high level overfill protection.