LAB4**-B Series
LAB4**-B Automatic Dehydrator, 48-60 VDC or 100-240 VAC 50/60Hz

Rev : A | Rev date : 24 Jan 2024

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

Product TypeAutomatic Dehydrator
max. System Volume @Sea Level l600
Output Capacity l/h300
Output Pressure kPa (PSIG)1 - 6 (0.15 - 0.87)
Output Dew Point °C-45
Number of Outlets4
Output Fitting7 mm
Noise Level at 3m dBA46
Network Managementoptional (SNMP V1)


Operating Voltage V100 - 240 VAC, 50 / 60Hz48 - 60 VDC
Pumping Power Consumption W55
Idle Power Consumption W2

Mechanical Specifications

Dimension H x D x Wcm13.2 x 20 x 48.2 (13.2 x 28.7 x 48.2 for wall mounting)


Ambient Temperature Range °C-10 to +50



Summary alarm provided by internal SPDT (Single Pole Double Throw) relay contacts.  (remote alarm)

Power and system failure (remote alarm)

High pressure alarm (local alarm or by optional snmp protocol)

Low pressure alarm (local alarm or by optional snmp protocol)

High humidity (local alarm or by optional snmp protocol)


Model NameDescription
TUBE-01-G18Gas inlet adaptor G 1/8" for 6mm tube
TUBE-01-010MButyl Tube, 0-1 Bar, 6-7mm, 10m
TUBE-01-050MButyl Tube, 0-1 Bar, 6-7mm, 50m
TUBE-0816Tube Clamp, 8-16 mm
TUBE-SEALTeflon Tape 10mm, 12m

External Document Links