LAB4-AC Automatic Dehydrator 100-240 VAC 50/60 Hz

Rev : B | Rev date : 05 May 2023

The LAB4 Automatic Pressurization Dehydrator is designed for reliable pressurization of elliptical waveguide, coaxial cable and rigid transmission line systems. The dehydrator includes a self contained completely automated air drying system that utilizes a pressure swing moisture absorption cycle to provide pressurized dry air. This eliminates the need for replacement or manual reactivation of the desiccant and makes the LAB4 dehydrators ideal for unattended operation at even remote sites.The pressure output is adjustabled in the field to operate anywhere between 1 kPa and 6 kPa (0.15 psig and 0.87 psig).A factory set safety valve at 7 kPa (1 psig) protects the products of destruction by over pressure.


  • Flow rate up to 300 Nl/h
  • dew point better than -45°C
  • two pumps and two drying chambers running alternatively continous duty and automatic operation drying chamber automatic regeneration
  • microprocessor control low/high pressure, high humidity, power and system failure alarm
  • local and remote alarm signalling
  • very low power consumption
  • low acustic noise
  • mounting: wall, floor, 19"" EIA, ETSI N3 rack

Technical features

General Specifications

Dehydrator TypeAutomatic
System CapacityStandard
60 Hz Output Capacity Nl/h (SCFM)300 (0.18)
50 Hz Output Capacity Nl/h (SCFM)300 (0.18)
Output Dew Point°C (°F)

-45 (-49)

Factory Set Output Pressure (on/off) kPa (psig)programable
Field Adjustable Output Pressure Deadband (on/off) kPa (psig)nominal output pressure continously hold
High Pressure Safety Relief Valve kPa (psig)7 (1)
Number of Outlets4
Output Fitting7 mm (0.28 inch)

Mechanical Specifications

Dimensions, H x W x Dmm (in)135 x 533 x 268 (5.3 x 21 x 10.6)
Net Weight kg (lb)6.5 (14.3)

Electrical Specifications

Pumping Power Consumption W55
Idle Power Consumption W2


Ambient Temperature Range °C (°F)-10 to 50 (14 to 122 )
Ambient Humidity Range, relative%95


Low Pressure Alarm ContactsFactory included

External Document Links