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GE Announces Greater
Accuracy of the HumiLab™ Bench-Top NIST Traceable Humidity Calibration
System
Wilmington, MA -March 30, 2004 - GE Infrastructure Sensing, a leading
provider of humidity, temperature, pressure and flow sensors and instruments,
announced today an even greater accuracy for its HumiLab™ NIST Traceable
Humidity Calibration Chamber.
The Humilab provides the ability to verify, calibrate and document
humidity sensors used in applications in aerospace, automotive,
pharmaceutical, electronic, plastics, chemical and food processing
and storage and HVAC building automation controls. The Humilab utilizes
the time-proportioned divided-flow technique developed by GE General
Eastern to achieve relative humidity stability of 0.2% RH. A built-in
chilled mirror hygrometer continuously measures the test environment
and provides feedback to the Humilab's microprocessor controller.
The system accuracy has been improved to ±1% from 10-70%RH & ±1.5%
from 70-90% RH.
The chilled mirror is a primary humidity instrument that controls
a polished rhodium mirror surface to a thermal and mass equilibrium
between dew formation and evaporation. Precise control is achieved
by using infrared optics to modulate thermoelectric cooling and
heating. The temperature of the mirror is measured with a precise
platinum RTD and the resulting temperature is by definition the
dew point. A second platinum RTD measures dry bulb temperature.
Relative Humidity is computed from these fundamental measurements.
The test chamber measures 644 cubic inches (10.6 L) in volume enabling
several humidity instruments to be calibrated simultaneously without
sacrificing portability. The test chamber is constructed of stainless
steel and is equipped with an onboard desiccant dryer and saturator.
The Humilab is equipped with fittings to connect a water bath/circulator
for standardized temperature control and for dry compressed air.
Bright LED displays indicate the set point, %RH and temperature.
Analog (4-20mA & 0-5VDC) signals and a digital interface (RS-232)
enable the chamber's environment to be recorded and documented.
ProstepÔ software enables "ramp and soak" profiles to be programmed
resulting in automated operation.
About GE Infrastructure
GE Infrastructure is a high-technology platform comprised of some of the fastest-growing businesses within GE. With 2004 revenues expected to approach $3.5 billion, they represent a set of advanced protection and productivity solutions to some of the most pressing issues that industries face - pure water, safe facilities, plant automation and detecting changes in the operating environment. GE Infrastructure is headquartered in Wilton, CT.
About GE Infrastructure Sensing
GE has united the technological innovation and experience of industry leaders in the design and manufacture of advanced sensing and measurement solutions into one world-class business - GE Infrastructure Sensing. This new business, with operations around the world, offers a broad range of products and services that help customers solve challenges and drive productivity.
GE Infrastructure Sensing’s precision instruments and systems measure temperature, pressure, liquid level, humidity, gas concentration, and flow rate for applications ranging from environmental, medical and pharmaceutical to automotive, aerospace, chemical and petrochemical. Using technologies such as infrared detection, ultrasonics and MEMS, GE Infrastructure Sensing helps customers monitor, protect, calibrate, control and validate their critical processes and applications.
GE Thermometrics, GE NovaSensor, GE Panametrics, GE General Eastern, GE Kaye, GE Druck and GE Ruska are now under one name: GE Infrastructure Sensing.
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