Waveguide Automatic Air Dehydrator with Ethernet Communications

Features & Benefits

  • Provides dry pressurized air to ensure signal quality of antenna waveguide and dielectric coaxial cable
  • Highly configurable to meet the needs of wide ranging applications
  • Programmable operating pressure range: 0.10 psig - 7.50 psig (7mbar - 517mbar)
  • 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
  • Optional front panel with display allows for IP configuration and status monitoring when no network is available
  • Simple power connections between 100 and 240 VAC, inclusive, or ±20-75 VDC
  • Small, light weight chassis with multiple mounting options makes installation easy
  • Low energy use minimizes operational costs
  • Quiet operation
ADH NETCOM Wall Mount Configuration

ADH NETCOM Wall Mount Configuration

ADH NETCOM Automatic Air Dehydrator

ADH NETCOM Automatic Air Dehydrator

ADH NETCOM Mounting Dimensions

ADH NETCOM Mounting Dimensions

ADH NETCOM Rack Mount Configuration

ADH NETCOM Rack Mount Configuration


ADH NETCOM Datasheet ADH NETCOM Manual ADH NETCOM AC Installation Sheet  ADH NETCOM DC Installation Sheet  ADH NETCOM Flow Chart

Waveguide Dehydrator: ADH NETCOM

The ADH NETCOM automatic waveguide dehydrator supplies low pressure dry air to keep waveguide and coaxial cable dry. Output pressure is configurable between 0.10 psig and 7.50 psig (7mbar – 517mbar) in 0.01 psig (0.67mbar) increments. Factory default pressure is 0.5 psig (34.5mbar). Operational monitoring and alarms are software based making them highly configurable in the field. Future software features can be installed while in service over the internet or local Ethernet network.


The ADH NETCOM automatic dehydrator is Ethernet network ready. Units can be configured and monitored using either built in SNMP support or the web interface. Legacy system support is provided via RS-422/485 or RS-232 interfaces. Three programmable alarm relays are also included. Communicated operational information includes output pressure, duty cycle, temperature, compressor hours and air drying canister status.

The ADH NETCOM automatic dehydrator uses a brushless dual-diaphragm pump for long life. Dehydrator operates with exceptionally low noise and vibration levels. The air drying canisters use aluminum oxide desiccant for high efficiency. The humidity sensor signals for regeneration based upon current dew point rather than at fixed time intervals for additional energy savings and long desiccant life.

The ADH NETCOM automatic dehydrator requires only 5-1/4″ (3-U) of rack space and is just 12″ (304.8mm) deep. Mounting hardware allows for flexible installation options including dual- and single-post rack mounting and wall mounting. The standard unit weighs just 16 lbs (7.26 kg).

The ADH NETCOM automatic dehydrator operates from 100-240 VAC, 50/60 Hz. Optional units are available at ±20-75 VDC. The dehydrator consumes a maximum of 100 watts during regeneration and approximately 40 watts otherwise. Heat dissipated is up to 325 BTU/hr during regeneration and approximately 100 BTU/hr otherwise. This product creates an exceptionally low heat load for an automatic dehydrator.

Optional Front Panel Display

An optional front panel with display allows for IP configuration and status monitoring when no network is available.




Approvals culuslisted 60950
Regeneration Method Automatic, demand
Maximum dew point −40˚ F/C
Dimensions 17″ × 12″ × 5-1/4″ (432mm × 305mm × 133mm)
Weight 16 lbs (7.26 kg)
Mounting Dual-post rack, flush mounted
Single-post rack, center mounted
Wall mounted
Supply 100-240 VAC, 50/60 Hz
±20-75 VDC
Maximum current 1.0 Amps at 100 V
Power usage 40 W typical, 100 W max
Heat dissipation 100 BTU/hr typical, 325 BTU/hr max
Flow rate 25.4 scfh (12 lpm)
Maximum pressure 7.5 psig (517mbar)
Internal safety relief valve 8 psig (552mbar)
Discharge port 1/8″ NPT
3/8″ or 1/4″ hose barb (both included)
Display units SI (millibars); English (psig), default
Protocols HTTP (Web Interface), SNMP, UDP, TFTP
Maximum pressure Configurable Range: 0.20 psig – 7.5 psig (14mbar – 517mbar), Default: 0.50 psig (34.5mbar)
Minimum pressure Configurable Range: 0.10 psig – 7.4 psig (7mbar – 510mbar), Default: 0.30 psig (21mbar)
Low pressure alarm level User Configurable, Default: 0.15 psig (10mbar)
High pressure alarm level User Configurable, Default 1.5 psig (103.5mbar)
Alarm relays Contact Type – Form C, SPDT, reverse acting
Ratings – 0.25 Amps @ 60 V
User configurable, Defaults:

  • Alarm Relay 1: Summary Alarm
  • Alarm Relay 2: Low Pressure Alarm
  • Alarm Relay 3: Over Pressure Alarm
Duty cycle alarm User configurable, Default: 50%
Master/Slave configuration User configurable, Default: Standard/Slave
Operating temperature 32°F to 130°F +/- 1°F (0°C to 55°C +/- 2°C)
Storage temperature −40°F to 150°F (−40°C to 60°C)

Ordering Information

Order Number Description
23437 ADH NETCOM Automatic Dehydrator, 100-240 VAC
24658 ADH NETCOM Automatic Dehydrator, 100-240 VAC with Display
23242 ADH NETCOM Automatic Dehydrator, ±20-75 VDC
24659 ADH NETCOM Automatic Dehydrator, ±20-75 VDC with Display