GE
Sensing
E4-1111H-GE
E4-1111H-GE is a General Eastern
product. General Eastern has joined
other GE high-technology sensing
businesses under a new name—
GE Industrial, Sensing.
g
General Eastern
Chilled Mirror Dew
Point Transmitter
Applications
• Gas and liquid fueled power turbines
• Environmental test chambers
• Pharmaceutical validation chambers
• Precision HVAC monitoring and control
• Outdoor air for building enthalpy control and cooling
tower efficiency calculations
• Engine test cells and emissions testing
• Heat exchanger and refrigerant coil calorimetry
• Weather telemetry
Precision Duct Mounted Humidity
Transmitter with Integrated Chilled
Mirror Sensor
• Utilizes the time proven single stage 1111H chilled
mirror sensor
• Sensor fully recovers from condensation
• Direct primary dew point measurement. National
Institure of Standards and Technology (NIST) traceable.
• Provides linear 4 to 20 mA signal
• RS232 Interface
• Equipped with patented PACER self-cleaning and
optical balancing system
• Sensor wetted components are inert. Optional
platinum mirror for more aggressive environments.
• High accuracy: ±0.36°F (± 0.2°C) dew/frost point
• No long-term drift
• Equipped with membrane filter
• Mirror is easily accessible for manual cleaning
The model E4-1111H-GE dew point transmitter was
derived from time proven chilled mirror technology,
which is widely used for precision humidity measurement
in metrology and standards labs worldwide.
This configuration was developed to measure and control
water vapor injection into the intake of gas and liquid
fueled power turbines, however the design is applicable
to many applications where accurate and repeatable
humidity measurement is required. This technology was
chosen because power turbines require the precise
metering of water vapor injection into the combustion
chamber to reduce pollutant emissions. Water vapor is
also added to the intake of the turbine to increase the
mass flow which in turn increases electrical power
output. The Model E4-1111H-GE is a laboratory grade
chilled mirror hygrometer, designed to meet the
requirements of industrial applications.
The transmitter is suitable for operation in a wide range
of environmental conditions, including outdoor air. The
sensor fully recovers from condensation and exhibits
negligible long-term drift. The electronic components
used are of the highest industrial quality. Each unit is
calibrated to NIST traceable reference standards and the
E4-1111H-GE is suitable for use as a dew point transfer
standard. For more information on the theory and
operation of General Eastern’s Chilled Mirror
Hygrometers, contact us to obtain a catalog and
application assistance.
GE
Sensing
E4-1111H-GE
Specifications
Electrical
Sensing Element
1/3 Class A DIN 43760 PRT, 100 S @ 32ºF (0ºC)
Dew/Frost Point
±0.36°F (±0.2°C)
Accuracy Sensitivity
> 0.09ºF (0.05ºC)
Repeatability
±0.09ºF (±0.05ºC)
Hysteresis
None
Cooling Stages
1
Depression @77°F (25ºC) and 1 Atmosphere in Air
81ºF (45ºC)
Maximum Cooling Rate
2.7ºF (1.5ºC)/sec (typical, above 32ºF (0ºC)
Dew/Frost Point Range
-49°F to 167ºF (-45°C to 75ºC) limited by dew point
depression at ambient temperature.
Relative Humidity Range
Equivalent to 6% to 100% at 77°F (25°C) dry bulb
Response Time
2.7°F (1.5°C) Td/sec above 32°F (0°C)
Operating Temperature
• Probe: -40°F to 176ºF (-40ºC to 80ºC)
• Electronics: -29°F to 176ºF (-20ºC to 80ºC)
Sensor Body Material
Epoxy-coated aluminum. Equipped with field replaceable
PTFE membrane filter
Sensor Wetted Material Power
Aluminum, mylar, fluropolymer
TM
and rhodium mirror
Power
100, 115 VAC or 230 VAC (±10%), 50 HZ to 60 HZ, 50 watts
max. (Specify voltage when ordering).
Analog Output
• 4 to 20 mADC, 500 S maximum
• 0 to 5 VDC, 5 mA maximum
Digital Interface
RS232 for programming and diagnostic purposes.
1200 baud, eight data bits, one stop bit, no parity.
PACER Cycle
Factory preset for 12 Hours. PACER runs on power up
Alarms
Service Alarm: TTL compatible. Indicates when mirror
needs manual cleaning.
Weight
8 lb (3.62 kg) net, 12 lb (5.44 kg) shipping
EMI Compliance
Complies to CE EMI Directive
Electronics Enclosure
Type 4/12 water and dust resistant. Wall mount.
Electrical I/O
Screw terminal block. Enclosure equipped with 12.7mm
1/2 in conduit openings.
8 in (20.3 mm)
17.4 in (44.1 mm)
18.4 in (468 mm)
10 in (254 mm)
10.5 in (267 mm)
Ø 0.5 in (12.7 mm)
4 places
9.2 in (237 mm)
4.25 in
(108 mm)
2.75 in (70 mm)
1/2 in
conduit
fittings
1.5 in
(39 mm)
Removable filter
Sensor
probe
E4-1111H-GE dimensions
GE
Sensing
g
©2006 GE. All rights reserved.
920-229A
All specifications are subject to change for product improvement without notice.
GE
®
is a registered trademark of General Electric Co. Other company or product
names mentioned in this document may be trademarks or registered trademarks
of their respective companies, which are not affiliated with GE.
www.gesensing.com
Fuse Protection
Line voltage and neutral fuses. 1A Slo-Blo, 3AG
E4-1111H-GE
Specifications
Options
• HEX-1 rhodium mirror (replacement mirror)
• HEX-2 platinum mirror (recommend for more
aggressive gases)
• 1111H-GE spare probe
• PTFE-GE spare PTFE filter
• MSK-2 mirror cleaning kit
GE
Sensing
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