absolute measurement
51ab- — a prefix indicating that an electrical unit is part of the CGS absolute electromagnetic system. These units are also indicated by the notation emu (as in volt emu ). Although these units are defined naturally as part of the CGS system, all of… …
52bar abs — , bar dif symbols indicating pressures measured in bars. bar abs indicates bars absolute, measuring the total pressure including the pressure of the atmosphere. bar dif indicates bars differential, measuring a difference between two… …
53degree Celsius — (°C) a metric unit of temperature. The Celsius temperature scale is named for the Swedish astronomer and physicist Anders Celsius (1701 1744), who used a similar scale. The freezing point of water (at one atmosphere of pressure) was originally …
54degree Kelvin — (°K) an obsolete name for the kelvin. In the International System, temperatures on the absolute temperature scale are stated in kelvins, not in degrees Kelvin …
55Engler degree — a unit of kinematic viscosity given by readings on an Engler viscometer. The reading is the time (in seconds) required for 200 milliliters of the liquid being tested to flow through the device. The conversion of Engler degrees to absolute… …
56inch of water gauge — (in wg or wg) another common name for the inch of water column. The word gauge (or gage ) after a pressure reading indicates that the pressure stated is actually the difference between the absolute, or total, pressure and the air pressure at… …
57millikelvin — (mK) a unit of temperature equal to 0.001 kelvin or 0.001 degree Celsius (°C). This unit is used mostly by scientists investigating substances cooled very close to absolute zero …
58millimeter of water gauge — (mm WG) another common name for the millimeter of water column. The word gauge (or gage ) after a pressure reading indicates that the pressure stated is actually the difference between the absolute, or total, pressure and the air pressure at… …
59psi — , psia, psid, psig traditional symbols for pressure units used in hydraulics and plumbing. psi is a symbol for pound per square inch (see above). psig is a symbol for pound per square inch gauge; this means that the pressure has been read… …
60Rankine — an absolute temperature scale; see degree Rankine …
