Low Cost, Low Profile Air Dehydrator

Features & Benefits

  • Keeps waveguide and coax dry to improve earth/base station reliability
  • Indoor or outdoor operation
  • Simple one-button operation with 2 digit, 7 segment display
  • Quiet operation: up to 36 dB
  • International applications: Selectable English or SI calibration; universal power supply 100 – 240 VAC, 50/60 Hz
  • High energy efficiency
  • Simple installation & maintenance

EDH-5 Air Dehydrator


EDH-5 Datasheet EDH-5 Manual  EDH-5 Installation Sheet

EDH-5 Air Dehydrator is a low profile, low cost waveguide or coax environment conditioner. It is engineered to help you get the best performance from your remote or mobile antenna transmission line, no matter how small or where it’s located.

This air dehydrator has a small footprint, an improved pressure sensor and efficient operations. It’s well suited for Ku and Ka band applications. The EDH–5’s go-anywhere, manually regenerated dehydrator pressurizes small volume waveguide and coax.

The discharge pressure is 0.5 psig (34.5 mbar) with a maximum flow rate of 4.77 scfh (2.25 lpm) and a typical dew point as low as -40°F/C. A microcontroller regulates pressure and manages all dehydrator functions. The EDH–5 indicates pressure and status on a bright 2-digit red LED display. Solid state control of all functions ensures reliability.

Selectable SI or English calibration ideally suit the EDH–5 and auto-select voltages from 100 to 240 VAC for global applications. The -40°F to 130°F (-40°C to 55°C) operating temperature range promotes terrestrial location flexibility.

The replaceable  or rechargeable desiccant container is accessed conveniently from the front of the unit. This can be done without removing the dehydrator from its waveguide. Should repairs ever be necessary, its modular subsystems eliminate the need for special tools and test equipment. The dehydrator limits continuous air pump operation to four hours in the event of a severe leak.

Review the specifications below or download the data sheet for more details on Environmental Technology’s Model EDH-5 Air Dehydrator. Contact us for helping find the best solutions to your particular applications.



Dehydrator Type Non-Programmable, Single Canister, Desiccant Dehydrator
Regeneration Method Manual Regeneration or Replacement
Regeneration Indication Desiccant Color Change and Compressor Run Time
Outlet Dew Point -40°C (New or newly regenerated desiccant)
to -10°C (Desiccant requiring regeneration or replacement)
Output Pressure 0.3 – 0.5 psig (34.5 mbar)
Flow Rate 4.77 scfh (2.25 lpm)
Capacity, Standard 18 scf (510 liters)
Capacity, Max 45 scf (1,274 liters)
Discharge port 1/8″ NPT Female (1/4″ Hose Barb supplied)
Relief Valve Pressure 1.8 psig ( 124 mbar)
Power Requirement @120 VAC: 20 watts nominal;
110 watts maximum; 8.16 watts minimum
Supply voltage 100 – 240 VAC Autoselect, 50/60 Hz
Reliability MTBF: 100,000 hours


Air Pressure Indication Digital Display (English or SI)
Data Display Pressure, Internal Temperature, Flow Rate,
Status, Duty Cycle, Error Codes
Communications Port Alarm Relay
Alarm Relay Capacity 2 Amp @ 30 VDC
Relay Connection 6-position terminal block


Rack Requires rack shelf: customer supplied
Wall/Bulkhead Yes
Table/Shelf Shock, vibration mounts: customer supplied


Weight 8 pounds (3.6 kg)
Height 9.125″ (232 mm)
Width 11.5″ (292 mm); 12.75″ (324 mm) including mounting ears
Depth 6.562″ (167 mm)


Storage Temperature -40°C to 60°C
Operating Temperature -40°C to 55°C : internal operating temperature raised to 0°C


Order Number Description
24894 EDH–5 Low Cost, Low Profile Air Dehydrator
17982 Wall mount adapter
18138 Replacement Desiccant