Product specifications

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DIFFERENTIAL PRESSURE
4
Absolute Pressure — Pressure measured relative to full vacu-

Atmospheric Pressure — Pressure of the atmosphere at the
earth’s surface NIST standard atmospheric pressure = 1.01325
bar.
BAR -
cury at 0°C, at 45°.
Barometric Pressure — Atmospheric pressure, often measured

Burst Pressure — The maximum pressure that may be applied
to the positive pressure port without rupturing the sensing ele-
ment.
Capacitive Sensing — Detection and measurement of pressure
through the change in voltage across a capacitor, one plate of
which is a diaphragm which deects slightly with changes in
applied pressure.
Compound Pressure — Pressure measured from full vacuum

Dierential Pressure — Pressure measured relative to a refer-
ence pressure. Referred to as pounds per square inch dieren-

FS (Full Span or Full Scale) — The range of measured values
over which a transducer is intended to measure, specied by


Gauge Pressure — Pressure measured relative to ambient
atmospheric pressure. Quantied in pounds per square inch

Manometer — An early instrument for measuring pressure;
-

other closed or connected to a registering or recording instru-
ment. Modern versions utilize diaphragms, bellows or other
devices for sensing relative pressures.
Millibar (mbar) — Unit of pressure generally used in barometric

2,

2
.
Newton (N) — The unit of force in the International System of

2
to a mass of 1 kg.
Pascal (Pa)

2

P/I 

Pressure Transducer — An electromechanical device for translat-
ing uid pressure values into voltages across a high-impedance

Pressure Transmitter — An electromechanical device for trans-

into a low-impedance load.
Proof Pressure — The maximum pressure that may be applied


PSIA — Pounds per square inch absolute.
PSIV — Pounds per square inch vacuum.
Range — The spread between the maximum and minimum
pressures between which the transducer has been designed to
operate.
Span — The algebraic dierence between the limits of the range.
-

Vacuum — Generally refers to pressures between 0 and atmo-


Relative Humidity — Relative humidity is a measurement of
water in the air at a given temperature.
Relative Humidity Accuracy — RH accuracy is the error between
the actual RH and the RH indicated by the humidity sensor,
Relative Humidity Repeatability — Repeatability is the ability of
the sensor to reproduce the output when moving in one direc-
tion, either from low to high RH or high to low.
RH Sensor Interchangeability — Interchangeability is the %RH
error introduced when replacing a sensor tip with a new sensor
tip.
RH Long Term Stability — Long term stability is the %RH error of
the sensor over time.
RH Sensor Recovery from Condensation — Recovery after
exposure to condensing conditions. Sensor should self-recover
after the moisture on the surface evaporates.
RH Sensor Recovery from Chemical and Physical Contaminants
— Sensing surface coated with a micro-pourous metal electrode,
allowing the polymer to absorb moisture while protecting it from
contamination and exposure to condensation
Current Sensor — A Current Sensor is a device that detects elec-
-
tional to it.