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.
Pressure Units
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.
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 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 Rate
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 Rate 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
mg
milligram
g
gram
kg
kilogram
lb
pound
Totalizer time
Displayed value is hours:minutes:seconds.
ms
millisecond
s
second
m
minute
hour
hour
day
day
Temperature Units
°C
degree Celsius
°F
degree Farenheit
K
degree Kelvin
°R
degree Rankine
Valve Drive Units
count
+/- 65536 at full drive
%
percent of full scale drive