The Metris Model EC400L3 is a fantastic temperature measuring instrument to diagnose problems in Reptile habitats, terrariums, cooking, RC hobby, computer overclocking, beverages, pools and hot tubs, child safety: car seats, playground equipment, even beach sand, HVAC and ...The Metris Model EC400L3 is a fantastic temperature measuring instrument to diagnose problems in Reptile habitats, terrariums, cooking, RC hobby, computer overclocking, beverages, pools and hot tubs, child safety: car seats, playground equipment, even beach sand, HVAC and electrical troubleshooting and much more ! The EC400L3 offers an outstanding Distance to Target [D:S] Ratio of 24 to 1. [ measure a 1 inch area from 24 inches / 2 inch area from 48 inches and so on]. Accurate measurements are taken safely away from hot or hazardous objects and avoiding contamination or invasion.