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This unit incorporates a refrigeration system thatdramatically increases the operational range of the cabinet.

A low-pressure water vapor generator, injecting saturatedwater vapor into the recirculating air duct, controls chamber humidification.This process is preferable to steam generation because steam introducesadditional heat to the chamber atmosphere, which then compromises temperaturecontrol. Uniform temperature and humidity are maintained by circulating chamberatmosphere through a recirculating air duct system. The air ducts also serve asshelf supports and can be easily removed for cleaning.

SHEL LAB Humidity Test Cabinets provide a controlledenvironmental chamber for a wide range of industrial and biotechnical testingapplications.

All chambers include:

  • Microprocessor Control
  • Seamless Corrosion-Resistant Stainless Steel Interior
  • High Limit Back-Up Controller

Please note this unit needs to be plumbed with distilledwater or filtered tap water. Water resistance must be in the range of 50K-1MOhm/cm or conductivity range of 20.0-1.0 uS/cm. If your laboratory cannotsupport this water quality, purchase the SHEL LAB Water Purification Kit. Seethe installation and operation manual for more information.



Part ID


Exterior Dimensions (W × D × H)

42.5 × 37 × 85
(1080 mm × 940 mm × 2159 mm)

Interior Dimensions (W × D × H)

30.2 × 26 × 62
(767 mm × 660 mm × 1575 mm)


28.2 cu.ft. (799 L)

Shelf Dimensions (W × D)

30.3 × 26.2 (768 mm × 665 mm)

Unit Weight

626 lbs (284 kg)

Interior Metal

430 SST

Exterior Metal

Painted Cold Roll Steel

Operating Temperature Range

10C - 70C

Controller Type


Display Resolution

0.1 °C

Power Voltage , Frequency and Current

110-120 VAC, 50/60 Hz, 18 Amps

Max HVAC Load

3890 BTUs/hr

SHC28R 110/120V Manual

SHC28R 220/240V Manual

SHC28R Brochure

Locate a Sales Rep Get a Quotation
Shel Lab Bactron Lab Armor Cascade TEK Visu HighPoint
Sheldon Manufacturing Inc

300 N. 26th Avenue • PO Box 627
Cornelius, OR 97113 USA
1 (888) 227-1410 •

ISO Certified