This is an overview of air dehydrators, manifolds and deice systems from Environmental Technology.

1. Environmental Technology, Inc.
ETI Product Overview
Susan M Jackson
Sales Director
sjackson@networketi.com
(574) 233-1202 ext. 229

2. ETI General Information
• ETI is a privately owned corporation which was formed by Thad Jones in
1968. The company’s corporate headquarters and manufacturing facility is
located at 1850 N. Sheridan Street in South Bend Indiana.
• For over 35 years, ETI has manufactured reliable specialty control
equipment including a reliable line of dehydrators for waveguide and coaxial
cable use as well as automatic controls, sensors, specialized cable and
insulating covers used for Satellite Earth Station , Terrestrial Microwave and
FM/ Broadcast antenna deice systems. ETI’s electric resistance heat deice
systems have been installed on thousands of satellite antennas with
apertures ranging from 50 centimeters – 10 meters. ETI supplies many
sectors such as Government and Military, Utilities and Energy, Oil and Gas,
Transportation and Highway, Railroad, Airport Authorities/Aviation, Fixed
and Mobile Broadcast applications as well as many General Industrial and
Commercial segments.
• ETI also designs and manufactures energy management controls for freeze
protection and temperature management applications for Residential,
Commercial and Industrial segments in multiple applications. Examples of
these are roof and gutter deice, pavement deice and heat trace.
02/21/2012 Page 2

3. ETI Contact Information
Environmental Technology, Inc.
1850 N. Sheridan Street
South Bend Indiana, 46628
Susan M. Jackson
Sales Director
Environmental Technology, Inc.
(800) 234-4239 ext. 229 (Toll free USA & Canada)
(888) 234-4238 fax (Toll free USA & Canada)
(574)233-1202 ext. 213
(574)233-2152 fax
sjackson@networketi.com
ETI Products and Accessories:
http://www.networketi.com/products.htm
Telecom Products:
http://www.networketi.com/products.htm
Telecom manuals:
http://www.networketi.com/telecom_manuals.html
02/21/2012 Page 3

4. Why use a dehydrator?
In all transmission systems electromagnetic waves have to be transported from the amplifier to the receiver.
The transmission path is divided into several parts.
amplifier - waveguide - antenna
antenna - waveguide – receiver
• Electromagnetic waves can only be transported completely undistorted in an absolute vacuum and through
absolute-reflecting guides. In practice, however, this is impossible. Obstacles in the form of dust particles and
water molecules etc., as well as waveguide imperfections caused by corrosion will distort the electromagnetic.
waves by scattering, velocity loss, time differentials, and so on.
• As wave guides, horn antennas and cables are never 100% air-tight, the best practical way of preventing solid
particles and water vapor from entering the transmission components and causing corrosion, is to pressurize the
transmission lines. In order to maintain a low relative humidity inside the transmission components under all
conditions, the air has to be clean and very dry.
Dry pressurizing systems are used for pressurizing –
• Waveguide in static installation
• Horn antennas
• Waveguides in mobile installations
• Waveguides in radar installation
• Radomes
• Transmission Cables
• Low noise amplifiers
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5. Dehydrators and Accessories
ETI produces three types of dehydrators:
• Passive
• Manually Regenerated
• Automatic Regenerating
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6. Dehydrators - Passive
RCD 1 - No moving parts
• Desiccant life - 12 to 18 months, or longer, before requiring
regeneration or replacement depending on conditions
• Used to dry waveguide and coax in fixed, mobile and solar
powered systems with volumes up to one cubic foot. Also used for
emergency situations w/out power
• Both systems use a blend of silica gel and activated alumina
desiccants (regenerate in convection or conventional oven)
RCD 2 - One moving part
• The RCD–2 provides a 1/8" male fitting - For proper gas diffusion
to waveguide
• Uses ambient temperature variations for pressurization -
• Negative System Pressure occurs as the temperature drops.
Ambient air is drawn in through the desiccant. Internal pressure
increases with ambient temperature, closing the check valve and
pressurizing the system.
02/21/2012 Page 6

7. Dehydrators -
Manually Regenerated
EDH-4 – low cost manually
regenerated dehydrator for
pressurizing small volume
waveguide and coax
• Output pressure of 0.5 psig with a maximum
flow rate of 6.0 scfh
• 120/230 volt 50/60 Hz operation
• Selectable English or SI calibration
• Rack, wall or outdoor mounting
• Convenient drying agent (desiccant) replacement
• Microprocessor control
• Low pressure, leaky system, low temperature and
replace desiccant alarm relays
02/21/2012 Page 7

8. Dehydrators – Obsolete, Older Generation
Automatic Regenerative
MODEL ADH®–2ACOM
• Output capacity 14.2 scfh (402.6 lph)
• Available in standard pressure of 0.5 psig (34.5
mbar) with 3psig (207 mbar) and 6 psig (414
mbar) options
• Available rack, wall or outdoor (NEMA) mounting
• Unattended operation
• S–A and terminal communication protocols
• 120/230 volt 50/60 Hz operation standard
• English or SI calibration standard
• CE certified
• MTBF − more than 50,000 hours when
maintaining a 5% or lower duty cycle. (Brushless
Compressor)
• Higher duty cycles may shorten the MTBF.
02/21/2012 Page 8

9. Dehydrators – Obsolete, Older Generation
Automatic Regenerative
MODEL ADH®–3COM
• Output capacity 26 scfh (736 lph)
• Available in standard pressure of 0.5 psig (34.5
mbar) with 3psig (207 mbar) and 6 psig (414
mbar) options
• Available rack, wall or outdoor mounting
• Unattended operation
• S–A and terminal communication protocols
• 120/230 volt 50/60 Hz operation standard
• English or SI calibration standard
• CE certified
• MTBF − more than 50,000 hours when
maintaining a 5% or lower duty cycle. (Brushless
Compressor)
• Higher duty cycles may shorten the MTBF.
02/21/2012 Page 9

10. Dehydrator Accessories -
Previous Generation ADH Series
MODEL AEC™–1 ETHERNET
CONVERTER
(For earlier, Obsolete ADH
Generations)
• Connects ADH–2ACOM and ADH–3COM to Ethernet networks
• Converts SA Protocol status messages to SNMP
• Remote monitoring with web interface or SNMP
(Communicated operational information: output pressure, duty cycle,
temperature and air drying canister status and dehydrator alarms)
• Limited remote command functionality – May place unit into standby
mode or back online.
• Powered by supplied 120VAC Wall Transformer or customer
supplied ±9-75VDC
02/21/2012 Page 10

11. Dehydrators - Current Generation
Automatic Regenerative – Rack/Wall
MODEL ADH® NETCOM™
(Replacement for earlier ADH
Generations)
• Output Capacity 25.4 scfh (12 lpm)
• Highly configurable to meet the needs of wide ranging applications
• Programmable operating pressure range: 0.10 psig - 7.50 psig
• Brushless compressor for long life
• Future-proof software based features allow updates and upgrades while in
service
• Remote monitoring and control with web interface or SNMP
• Configurable Master/Slave operation
• Ethernet, RS-422/485, RS-232 and alarm relay outputs for compatibility with
nearly any system
• Simple power connections for 100-240 VAC or 0-75 VDC
• Small, light weight chassis with multiple mounting options
02/21/2012 Page 11

12. Manifolds - Current Generation
Automated Air Distribution Manifold
MODEL ASM–1® SMART MANIFOLD™
• Distributes dry low pressure air from one or more
sources to one or more transmission lines
• Continuous system monitoring allows leaking
lines to be isolated while the rest of the system
remains pressurized
• Periodic automated line testing to identify future line leaks (maintenance planning)
• Programmable operating pressure range: 0.10 psig - 7.50 psig
• Programmable pressure relief valve to bleed off excess system pressure
• Future-proof software based features allow updates and upgrades in service
• Remote monitoring and control with web interface or SNMP
• Configurable Parallel Pumping operation combines multiple ADH NETCOM dehydrators
for increased system capacity
• Configurable Redundant Pumping operation combines multiple ADH NETCOM
• Ethernet, RS-422/485, RS-232 and alarm relay outputs for compatibility
• Simple power connections for 100-240 VAC or ±20-75 VDC
• Small, light weight chassis with multiple mounting options
makes installation easy
02/21/2012 Page 12

13. Dehydrators - Current Generation
Automatic Regenerative - NEMA
MODEL ADH® NETCOM™NEMA
(Replacement for earlier ADH NEMA
Generations)
• Output Capacity 25.4 scfh (12 lpm)
• Operating temperature −40°F to 130°F (−40°C to 55°C)
• Highly configurable to meet the needs of wide ranging applications
• Programmable operating pressure range: 0.10 psig - 7.50 psig
• Brushless compressor for long life
• Future-proof software based features allow updates and upgrades while in service
• Remote monitoring and control with web interface or SNMP
• Configurable Master/Slave operation
• Ethernet, RS-422/485, RS-232 and alarm relay outputs
• Durable, light weight IP66, NEMA 4X enclosure
• Designed to allow minimal flex without damaging enclosure or components (for mobile
and other high vibration applications)
• Optionally available with 2 types of military style connectors
• Low energy use minimizes operational costs
02/21/2012 Page 13

14. Dehydrator - Accessories
Air Distribution Manifolds
RCM- 1 - Low pressure (15 oz/in2)
• Enables a dehydrator to be shared with multiple antennas
• Provides an additional point to monitor dehydrator system
operation
• Provides the ability to identify and isolate leaks
• May parallel several dehydrators
• Provides nine valve-controlled ports
RCM-2 - High Pressure (15 psig)
• Space efficient vertical mounting
• Simple to install and operate
• Cascade several manifolds
• High and low pressure options
• Low cost
02/21/2012 Page 14

15. Accessories – Partial List
ETI Part #
23103 - Black Polyethylene UV resistant semi-rigid, 1/4” ID 3/8” OD, 25‘
23104 - Black Polyethylene UV resistant semi-rigid, 1/4” ID 3/8” OD, 50'
23105 - Black Polyethylene UV resistant semi-rigid, 1/4” ID 3/8” OD, 100'
23106 - Black Polyethylene UV resistant semi-rigid, 1/4” ID 3/8” OD, 250'
23454 - Black Polyethylene UV resistant semi-rigid, 1/4” ID 3/8” OD, 500'
23431 - Black Polyethylene UV resistant semi-rigid, 3/8” ID 3/8” OD, 25‘
23432 - Black Polyethylene UV resistant semi-rigid, 3/8” ID 3/8” OD, 50'
23433 - Black Polyethylene UV resistant semi-rigid, 3/8” ID 3/8” OD, 100'
23434 - Black Polyethylene UV resistant semi-rigid, 3/8” ID 3/8” OD, 250'
23435 - Black Polyethylene UV resistant semi-rigid, 3/8” ID 3/8” OD, 500'
02/21/2012 Page 15

16. Accessories – Partial List
16298 T" male 1/4” (3) barbed connector, plastic
14583 Elbow 1/8" NPT to 1/4” hose barb, plastic
14513 Elbow 1/8" NPT to 1/4” hose barb, brass
18198 Hose Barb 1/4" to 1/8" NPT male – straight, brass
23428 Hose Barb 3/8" to 1/8" NPT male – straight, brass
18040 Hose Barb 1/4" to 1/8" NPT female – straight, brass
16725 Compression Male 1/8" NPT – 3/8" OD tubing – straight, brass
16727 Elbow, Compression Male 1/8" NPT – 3/8" OD tubing, brass
23023 Tee,Brass,1/8"NPT,F-F-M
18051 Teflon Tape
02/21/2012 Page 16

17. Dehydrator-New Developments
Spring/Early Summer 2012
MODEL ADH® SIROCCO™
(Replacement for earlier ADH
Generations – Front Panel Display only -
no remote communications)
• Output Capacity 11.1 scfh (5.25 lpm) @0.5 psig (34.5 mbar)
• Highly configurable to meet the needs of wide ranging applications
• Programmable operating pressure range: 0.10 psig - 7.50 psig
• Three configurable alarm relays included – Communicated information
includes output pressure, duty cycle, temperature, compressor
hours, and air drying canister status.
• Brushless compressor for long life
• Simple power connections for 100-240 VAC
• Small, light weight chassis with multiple mounting options – 16 lbs
• Low energy use minimizes operational costs
• Quiet Operation
02/21/2012 Page 17

18. CLEAR SIGNAL ®
DEICING SYSTEM
General Information
• Reliable satellite communications during the winter
• Automatic operation
• Built-in fault protection
• Both deicing and anti-icing available (specify climate
conditions)
• Standard nominal power densities include 40 watts per
square foot for deicing and 140 watts per square foot
for anti-icing
• Standard voltages include 24, 100, 120, 200,230 and
240 volts single phase and 208, 240, 277 and 480 volts
3-phase
• Ultra reliable heater technology
• Low purchase and energy efficient operating costs
• Easy field or factory installation
• 15 year maintenance free design life - Heaters use high
temperature and mechanically robust Tefzel® insulation
• Easily accommodates antennas through 10 meter
02/21/2012 apertures Page 18

19. CLEAR SIGNAL DEICING SYSTEM
®
Typical Installation
02/21/2012 Page 19

20. CLEAR SIGNAL DEICING SYSTEM
®
Typical Installation Photographs
02/21/2012 Page 20

21. CLEAR SIGNAL DEICING SYSTEM ®
Sensors & Controls
LCD–7A Snow Switch® - Other LCD models available – special
Control applications
• Simple installation
• Melt-Track™ for improved energy efficiency - 3 hour hold-on time
• On-Demand™ for longer sensor life powering the moisture sensor only
when required – Heaters operate at temperatures below 38˚F (other
available LCD Models also operate between 17˚F and 38˚F only – with
1 hr hold time)
• Sno-Test™ for simple on-site testing , self-test after power application
Small Aperture • Extremely low standby power consumption - < .6 Watts idling
Applications
• Controls heater loads up to 16 amps at 120 volts.
• Mounted on Junction Box for Telecommunication applications
Sensor MODEL CIT®–1 SNOW SENSOR
• The CIT–1 Snow Sensor detects falling or blowing precipitation as
snow at temperatures below 38°F (3.3°C).
• Provides cost effective automatic snow melting control when used
with any APS control panel
• Low voltage operation, up to 2,000'(609.6m) separation from the
control
02/21/2012 Page 21

22. CLEAR SIGNAL DEICING SYSTEM ®
Sensors & Controls
Control MODEL APS®–4C SNOW SWITCH
• Automatic snow/ice melting control
• Satellite contactor interface for larger systems (SC-40C)
• Energy management computer (EMC) interface
• Accommodates MI, constant wattage and self-limiting heaters 40°F
to 90°F (4°Cto 32°C) high limit thermostat prevents excessive
temperatures
• Advanced patented and patent pending ground fault protection - trip
Large current can be set at 60 or 120 mA via an internal switch or retained
Aperture at the 30 ma default
Applications • Heater hold-on and test capabilities - adjustable hold-on timer
Single Phase continues heater operation for up to 10 hours
and Three • Simple to install and operate
Phase • Low system costs/ Minimum energy costs
RCU–4 REMOTE CONTROL UNIT
• Remote system status indication
• Convenient manual control of hold on time
• Low voltage operation, up to 2,000'(609.6m) separation from the
control Page 22
02/21/2012