Each numeric value exchanged between your control device and Realer belongs to a quantity context (QC). QCs define the kind of measurement your value represents, such as mass, temperature, pressure, humidity, or other domain-specific metrics.
Realer provides a catalogue of QCs to ensure consistent interpretation, validation, and conversion of data across dashboards, rules, and APIs. When developing your device, use the QC that best matches the type of value your device processes.
Absorbed dose
Application domains:
medicine and biology
Example units:
Gy (gray)
Absorbed dose rate
Application domains:
medicine
Example units:
Gy/s (gray per second)
Acceleration
Application domains:
mechanics
Example units:
m·s⁻² (metre per second squared)
Amount concentration
Aliases:
concentration and molar concentration
Application domains:
chemistry, biology and medicine
Example units:
m⁻³·mol (mole per cubic metre)
Amount of substance
Application domains:
chemistry, biology and medicine
Example units:
mol (mole), pmol (picomole) and nmol (nanomole)
Angular acceleration
Application domains:
mechanics
Example units:
rad/s² (radian per second squared)
Angular momentum
Aliases:
action
Application domains:
mechanics
Example units:
kg·m²·s⁻¹ (kilogram metre squared per second) and J·s (joule second)
Angular velocity
Application domains:
mechanics
Example units:
rad/s (radian per second)
Area
Application domains:
mechanics, environment and biology
Example units:
m² (square metre), ha (hectare) and b (barn)
Capacitance
Application domains:
electromagnetism
Example units:
F (farad)
Catalytic activity
Application domains:
chemistry, biology and medicine
Example units:
kat (katal), kat/m³ (katal per cubic metre) and U (enzyme unit)
Celsius temperature
Application domains:
thermodynamics, biology, medicine and environment
Example units:
°C (degree celsius)
Colour depth
Application domains:
digital, computing and information
Example units:
bit/px (bit per pixel), kbit/px (kilobit per pixel) and Mbit/px (megabit per pixel)
Current density
Application domains:
electromagnetism
Example units:
m⁻²·A (ampere per square metre)
Data
Application domains:
digital, computing and information
Example units:
bit (bit), B (byte) and kbit (kilobit)
Data rate
Application domains:
digital, computing, information and network
Example units:
bit/s (bit per second), B/s (byte per second) and kbit/s (kilobit per second)
Density
Aliases:
mass concentration
Application domains:
mechanics, chemistry, biology and medicine
Example units:
kg·m⁻³ (kilogram per cubic metre)
Dimensionless
Any quantity that has no physical unit.
Application domains:
statistics and custom applications
Example units:
% (percentage), # (count) and 1 (unitless)
Dose equivalent
Application domains:
medicine and biology
Example units:
Sv (sievert)
Dynamic viscosity
Application domains:
mechanics and chemistry
Example units:
Pa·s (pascal second)
Electric charge
Application domains:
electromagnetism
Example units:
C (coulomb), A·h (ampere hour) and mA·h (milliampere hour)
Electric charge density
Application domains:
electromagnetism
Example units:
C/m³ (coulomb per cubic metre)
Electric current
Application domains:
electromagnetism and energy
Example units:
A (ampere), µA (microampere) and mA (milliampere)
Electric field strength
Application domains:
electromagnetism
Example units:
V/m (volt per metre)
Electrical conductance
Application domains:
electromagnetism
Example units:
S (siemens)
Electrical resistance
Application domains:
electromagnetism
Example units:
Ω (ohm)
Energy
Application domains:
mechanics, thermodynamics and energy
Example units:
J (joule), eV (electronvolt) and kW·h (kilowatt hour)
Energy density
Application domains:
mechanics, thermodynamics and energy
Example units:
J/m³ (joule per cubic metre)
Entropy
Aliases:
heat capacity
Application domains:
thermodynamics
Example units:
J/K (joule per kelvin)
Exposure to x- and γ-rays
Application domains:
medicine
Example units:
C/kg (coulomb per kilogram)
Force
Aliases:
weight
Application domains:
mechanics
Example units:
N (newton)
Frequency
Application domains:
mechanics, medicine and computing
Example units:
Hz (hertz) and bpm (beats per minute)
Fuel efficiency
Application domains:
economics and mechanics
Example units:
L/100 km (litre per 100 kilometres)
Heat flux density
Aliases:
irradiance
Application domains:
thermodynamics and energy
Example units:
W/m² (watt per square metre)
Humidity
Application domains:
environment, biology and medicine
Example units:
% (relative humidity) and g/m³ (absolute humidity)
Illuminance
Application domains:
optics
Example units:
lx (lux)
Inductance
Application domains:
electromagnetism
Example units:
H (henry)
Length
Application domains:
mechanics, space, biology and medicine
Example units:
m (metre), au (astronomical unit) and Å (ångström)
Logarithmic ratio
Application domains:
information
Example units:
Np (neper), B (bel) and dB (decibel)
Luminance
Application domains:
optics
Example units:
m⁻²·cd (candela per square metre)
Luminous efficacy
Application domains:
optics
Example units:
lm·W⁻¹ (lumen per watt)
Luminous energy
Application domains:
optics
Example units:
lm·s (lumen second)
Luminous flux
Application domains:
optics
Example units:
lm (lumen)
Luminous intensity
Application domains:
optics
Example units:
cd (candela)
Magnetic field strength
Application domains:
electromagnetism
Example units:
m⁻¹·A (ampere per metre)
Magnetic flux
Application domains:
electromagnetism
Example units:
Wb (weber)
Magnetic flux density
Application domains:
electromagnetism
Example units:
T (tesla)
Mass
Application domains:
mechanics, chemistry, biology and medicine
Example units:
kg (kilogram), t (tonne) and Da (dalton)
Molar energy
Application domains:
chemistry and energy
Example units:
J/mol (joule per mole)
Molar entropy
Aliases:
molar heat capacity
Application domains:
chemistry
Example units:
J/(mol·K (joule per mole kelvin)
Moment of force
Aliases:
torque, moment and turning moment
Application domains:
mechanics
Example units:
N·m (newton metre)
Momentum
Application domains:
mechanics
Example units:
kg·m·s⁻¹ (kilogram metre per second)
Optical refractive power
Application domains:
optics
Example units:
D (dioptre)
Permeability
Application domains:
electromagnetism
Example units:
H/m (henry per metre)
Permittivity
Application domains:
electromagnetism
Example units:
F/m (farad per metre)
Picture element
Application domains:
digital, computing and information
Example units:
px (pixel), kpx (kilopixel) and Mpx (megapixel)
Pixel density
Application domains:
digital, computing and information
Example units:
Mpx/cm² (megapixel per square centimetre)
Pixel resolution
Application domains:
digital, computing and information
Example units:
px/m (pixel per metre), kpx/m (kilopixel per metre) and Mpx/m (megapixel per metre)
Plane angle
Aliases:
phase angle
Application domains:
mechanics and space
Example units:
rad (radian), ° (degree) and ′ (minute of arc)
Potential difference
Application domains:
electromagnetism
Example units:
V (volt)
Power
Application domains:
energy, mechanics and electromagnetism
Example units:
W (watt)
Pressure
Application domains:
mechanics, thermodynamics and medicine
Example units:
Pa (pascal), bar (bar) and mmHg (millimetre of mercury)
Radiance
Application domains:
optics
Example units:
W/(m²·sr) (watt per square metre steradian)
Radiant intensity
Application domains:
optics
Example units:
W/sr (watt per steradian)
Radionuclide activity
Application domains:
medicine
Example units:
Bq (becquerel)
Solid angle
Application domains:
mechanics, optics and space
Example units:
sr (steradian)
Specific energy
Application domains:
mechanics, thermodynamics and energy
Example units:
J/kg (joule per kilogram)
Specific entropy
Aliases:
specific heat capacity
Application domains:
thermodynamics
Example units:
J/(kg·K) (joule per kilogram kelvin)
Specific volume
Application domains:
mechanics and chemistry
Example units:
kg⁻¹·m³ (cubic metre per kilogram)
Surface charge density
Aliases:
electric flux density and electric displacement
Application domains:
electromagnetism
Example units:
C/m² (coulomb per square metre)
Surface density
Application domains:
mechanics and biology
Example units:
kg·m⁻² (kilogram per square metre)
Surface tension
Application domains:
mechanics and chemistry
Example units:
N/m (newton per metre)
Thermal conductivity
Application domains:
thermodynamics
Example units:
W/(m·K) (watt per metre kelvin)
Thermal insulance
Application domains:
thermodynamics
Example units:
R (R-value) and tog (tog)
Thermodynamic temperature
Application domains:
thermodynamics, biology and medicine
Example units:
K (kelvin)
Time
Application domains:
mechanics, thermodynamics, medicine and computing
Example units:
s (second), min (minute) and h (hour)
Velocity
Aliases:
speed
Application domains:
mechanics and space
Example units:
m/s (metre per second), km/h (kilometre per hour) and kn (knot)
Volume
Application domains:
mechanics, biology, medicine and chemistry
Example units:
m³ (cubic metre), L (litre) and mL (millilitre)
Volumetric flow rate
Application domains:
mechanics, environment and medicine
Example units:
m³·s⁻¹ (cubic metre per second)
Wavenumber
Application domains:
optics and chemistry
Example units:
m⁻¹ (reciprocal metre)
Can't find the quantity context you need? Contact us to request it.