General Eastern Dew-10 Specifications

Features

• Primary dew point measurement

• High accuracy

• Wide operating range

• No drift

• No hysteresis

• Direct dew point and temperature signals

GE

Sensing

Dew-10

Dew-10 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

• Precision HVAC/BAS

• Clean rooms

• Museums

• Film storage

• Pharmaceutical

Primary Dew Point Measurement with
4 to 20 mA or PRTD Output

The Dew-10 series is a family of cost effective chilled
mirror dew point transmitters comprising of wall, duct
and pipe mounted models. These instruments provide
accurate and reliable dew point measurements over a
wide range for building automation, mission critical
environments and clean industrial applications.

Dew-10s provide accuracy of ±1ºF (±0.5ºC) over a range of

-40ºF to 136ºF (-40ºC to 58ºC) dew point. The range is
dependent on the ambient temperature. At 77°F (25°C) the
units provide approximately 72°F (40°C) depression. The
wall mount version is also available with an air temperature
measurement capability over the same range.

The Dew-10 measures dew point by utilizing a solid state
heat pump to cool a metallic mirror. When the mirror
temperature reaches the dew point of the surrounding
air, a thin dew layer condenses on the mirror surface. The
condensation is optically detected. A feedback loop keeps

the mirror at the exact dew point by continuously
controlling the mirror temperature. A precision PRTD
(Platinum Resistance Temperature Detector) is embedded
just beneath the surface of the mirror, allowing the dew
point temperature to be precisely measured.

Maintenance is straight-forward. Filter replacement and
cleaning the mirror with a cotton swab restores the
transmitter to its original condition. Since the wetted
components are inert and the RTD is hermetically sealed,
Dew-10s provides many years of drift-free
measurement.

Each transmitter is calibrated to National Institute of
Standards and Technology (NIST) traceable reference
standards. A certificate of conformance with functional
test data is supplied. Our manufacturing and quality
system certified to ISO-9001 standards and Six-Sigma
methodology is applied.

Contact our applications engineers to discuss your
precision humidity measurement requirements.

GE

Sensing

Dew-10
Specifications

Wall Mounted Unit

Accuracy

±1.0ºF (±0.5ºC)

Repeatability

±0.1ºF (±0.05ºC)

Hysteresis

None

Dew Point Output

Platinum RTD, four-wire, 100 Ω at 32ºF (0ºC) or
4 to 20 mA signal

Temperature Output

Platinum RTD, four-wire, 100 Ω at 32ºF (0ºC) or
4 to 20 mA signal

Power Supply

24 VDC, 24 VAC, 115 VAC, 230 VAC, 10 watts maximum

Dew Point Range

-10ºF to 136ºF (-24ºC to 58ºC)

Operating Temperature

32ºF to 140ºF (0ºC to 60ºC)

Pressure

One atmosphere nominal

Weight

5.0 lb (2.5 kg)

Pipe/Duct Mounted Unit

Accuracy

±1.0ºF (±0.5ºC)

Repeatability

±0.1ºF (±0.05ºC)

Dew-10 dimensions

GE

Sensing

4.75 in (120.65 mm)

Sample air outlet port

(1 in (25.4 mm) minimum

clearance required)

6.55 in

(166.37 mm)

2.6 in

(66.04 mm)

maximum

0.4 in (10.16 mm)
minimum

Sample air intake port

Air thermometer and

shield (optional)

Plastic cover (fire retardant abs)

Ø 1 in

(25.4 mm)

1 in (25.4 mm)

high dimple on “B” holes

Metal base

4.1 in (104.14 mm)
maximum

Ø 2.7 in (8.58 mm)

maximum

3.37 in

(88.8 mm)

typical

0.35 in

(8.8 mm)

typical

0.19 in

(4.83 mm)

typical

8.25 in

(109.55 mm)

maximum

4.25 in (107.05 mm)
maximum

1 in (24.5 mm)

maximum

1 in (24.5 mm)

maximum

8 in (152.4 mm)

maximum

1 in (25.4 mm)

compression fittings

1 in NPT

2.5 in (89.5 mm) minimum
4 in (101.6 mm) maximum

Pipe Mount Sensor

Duct Mount Sensor

Sensor

Sponge

gasket

Duct

mounting

plate

3.4 in

(96.36 mm)

g

©2006 GE. All rights reserved.
920-294A

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

GE

Sensing

Dew-10
Specifications

Ordering Information

The code number to be ordered may be specified as follows:
Dew-10

Code Power

0 24 VDC (standard)
1 24 VAC
2 115 VAC
3 230 VAC

Code Output Signal

A RPT direct; 100 W, 32°F (0°C)
B 4 to 20 mA (15 VDC) 0°F to 100°F (-17°C to 37°C)
C 4 to 20 mA (15 VDC) 32°F to 122°F (0°C to 50°C)
D 4 to 20 mA (15 VDC) 40°F to 140°F (4°C to 60°C)
X 4 to 20 mA (15 VDC) user specified

Code Mounting

0 Wall
0 Wall with temperature
1 Duct
2 Pipe

Dew-10 - ____ - ____ - ____ Typical model number

For wall mounted unit with temperature, select two output signals. Example: Dew-1-OCC0 is a
wall mounted unit with 24 VDC power supply, dual 4 to 20 mA signals (dew point and
temperature) scaled for 32°F to 122°F (0°C to 50°C).

Hysteresis

None

Output

Platinum RTD, four-wire, 100 Ω at 32°F (0ºC) or
4 to 20 mA signal

Power Supply

24 VDC, 24 VAC, 115 VAC, 230 VAC 10 watts maximum

Dew Point Range

-40°F to 155ºF (-40°C to 68ºC)

Pressure

10 ft (3 m) water column

Duct Air Velocity

500 to 3,000 ft/min (50 to 900 m/min)

Operating Temperature

• Electronics: 32°F to 122ºF (0°C to 50ºC)

• Probe: -40°F to 155ºF (-40°C to 68ºC)

Weight

5.0 lb (2.5 kg)