Liquid-In-Glass Thermometers. A liquid-in-glass thermometer is the simplest and most commonly employed type of temperature measurement device. It is one of the oldest thermometers available in the industry. It gives fairly accurate results within the temperature range of -200 to 600Â°C. No special means are needed to measure temperature via these thermometers.
This brings us to the definition of detection or reporting limits. The smallest concentration (or amount) of analyte, that can be reported by a laboratory is called reporting limit. AIHA requires RL (reporting limit) which is LOD times a safety factor selected by the laboratory.
Probably much to the chagrin of practitioners, the official definition of limit of detection is not really simple: Taking the detection decision at the critical level (LC) leads to a risk a of false detects. Given this critical level, the limit of detection (LD) is construed as the level that will lead to false non-detects with probability b. Common values for a and b are 1% and 5%. The proper values are of course problem-dependent. This definition may lead to surprises.