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Alicat engineering units

Most Alicat mass flow and pressure instruments have user-selectable engineering units. Below is a list of all engineering units for pressure, flow, and temperature.

Alicat pressure controllers and transducers have dedicated pressure sensors that are referenced to absolute, gauge, or differential pressure. Engineering units may be changed within these pressure types, but the reference may not be changed (e.g., from absolute to gauge).

Most Alicat mass flow meters and controllers display absolute pressure only, but battery-powered models (e.g., MB, MWB, FP-25) use their integrated barometers to display gauge pressure as well. Barometer readings for these instruments are in units of absolute pressure.

Pressure engineering units
Absolute Gauge Differential Notes
PaA PaG PaD pascal
hPaA hPaG hPaD hectopascal
kPaA kPaG kPaD kilopascal
MPaA MPaG MPaD megapascal
mbarA mbarG mbarD millibar
barA barG barD bar
g/cm2A g/cm2G g/cm2D gram force per square centimeter
kg/cmA kg/cmG kg/cmD kilogram force per square centimeter
PSIA PSIG PSID pound force per square inch
PSFA PSFG PSFD pound force per square foot
mTorrA mTorrG mTorrD millitorr
torrA torrG torrD torr
mmHgA mmHgG mmHgD millimeter of mercury at 0 C
inHgA inHgG inHgD inch of mercury at 0 C
mmH2OA mmH2OG mmH2OD millimeter of water at 4 C (NIST conventional)
mmH2OA mmH2OG mmH2OD millimeter of water at 60 C
cmH2OA cmH2OG cmH2OD centimeter of water at 4 C (NIST conventional)
cmH2OA cmH2OG cmH2OD centimeter of water at 60 C
inH2OA inH2OG inH2OD inch of water at 4 C (NIST conventional)
inH2OA inH2OG inH2OD inch of water at 60 C
atm atmosphere
m asl meter above sea level (only in /ALT builds)
ft asl foot above sea level (only in /ALT builds)
V volt; no conversions are performed to or from other units
count count count setpoint count, 0 – 64000
% % % percent of full scale
Flow rate engineering units
Volumetric Standard Normal Notes
uL/m SuL/m NuL/m microliter per minute
mL/s SmL/s NmL/s milliliter per second
mL/m SmL/m NmL/m milliliter per minute
mL/h Sml/h NmL/h milliliter per hour
L/s SL/s NL/s liter per second
LPM SLPM NLPM liter per minute
L/h SL/h NL/h liter per hour
US GPM US gallon per minute
US GPH US gallon per hour
CCS SCCS NCCS cubic centimeter per second
CCM SCCM NCCM cubic centimeter per minute
cm3/h Scm3/h Ncm3/h cubic centimeter per hour
m3/m Sm3/m Nm3/m cubic meter per minute
m3/h Sm3/h Nm3/h cubic meter per hour
m3/d Sm3/d Nm3/d cubic meter per day
CIM SCIM cubic inch per minute
CFM SCFM cubic foot per minute
CFH SCFH cubic foot per hour
kSCFM 1000 cubic feet per minute
count count count setpoint count, 0 – 64000
% % % percent of full scale

 

True mass flow engineering units
mg/s milligram per second
mg/m milligram per minute
g/s gram per second
g/m gram per minute
g/h gram per hour
kg/m kilogram per minute
kg/h kilogram per hour
oz/s ounce per second
lb/m pound per minute
lb/h pound per hour
Totalized flow engineering units
Volumetric Standard Normal Notes
uL SuL NuL microliter
mL SmL NmL milliliter
L SL NL liter
US gal US gallon
cm3 Scm3 Ncm3 cubic centimeter
m3 Sm3 Nm3 cubic meter
in3 Sin3 cubic inch
ft3 Sft3 cubic foot
kSft3 1000 cubic feet
uP micropoise, a measure of viscosity; no conversions are performed to or from other units
Total mass engineering units
mg milligram
g gram
kg kilogram
lb pound
Totalizer time units

(Displayed value is hours:minutes:seconds.)

Label Notes
ms millisecond
s second
m minute
hour hour
day day
Temperature engineering enits
Label Notes
°C degree Celsius
°F degree Farenheit
K degree Kelvin
°R degree Rankine
Valve drive engineering units
Label Notes
count +/- 65536 at full drive
% percent of full scale drive
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