Â· 43 comments. in Facts. An intelligence quotient, or IQ, is a score derived from one of several standardized tests designed to assess intelligence. The abbreviation âIQâ comes from the German term Intelligenz-Quotient, originally coined by psychologist William Stern.
Lower explosive limit. Lower explosive limit (LEL): The lowest concentration (percentage) of a gas or a vapor in air capable of producing a flash of fire in presence of an ignition source (arc, flame, heat). The term is considered by many safety professionals to be the same as the lower flammable limit (LFL).
Multi-Gas Detector Confined Space Kit, 4 Gas, Detects Methane, Oxygen, Carbon Monoxide, Hydrogen Sulphide, Sensor Range LEL 0 to 100 Percent LEL or 0 to 5 Percent Vol, O2 0 to 25 Percent Vol, CO 0 to 2000 ppm, H2S 0 to 100 ppm, Housing Color Black, Operating Temp.