23 Cu. Ft. White Diamond Series Stainless Steel Auto Defrost Freezer (-30°C Operation)

Product Number: NSWDF231SSS/0A3

NLS Natural Refrigerant Labelcapture (1)

White Diamond Series Glass Door Laboratory and Medical Stainless Steel Freezer with Microprocessor temperature controller. This unit features hydrocarbon natural refrigerants and a touch screen digital temperature display with user friendly interface. Audible and visual high/low alarms and remote alarm contacts are some of the features of this well rounded unit. Operating Temperature to  (-30°). Please see below for more details. 

DISCLAIMER: Auto defrost freezers incorporate an electric heater installed on the evaporator that assist in the removal of the frost and ice. Although the heater helps speed up the frost and ice removal, it can raise the temperatures within the freezer.

Nor-Lake Scientific is Going Green!  We are an industry leader in providing a variety of Refrigerators and Freezers that are built with Hydrocarbon Refrigerants, R290 or R600a.

Environmentally friendly, natural hydrocarbon (HC) refrigerants (not containing hydrofluorocarbons) vastly reduce global-warming potential (GWP) while meeting new EPA/SNAP mandates and UL, ASHRAE compliance guidelines.


  • USB port for data transfer and software updates
  • Real-time operational display clock
  • 4-20mA output
  • Adjustable alarm volume
  • 5 adjustable shelves
  • Audible and visual high/low temperature alarms
  • 2 probes; 1 in air and 1 in sample bottle
  • Continuous product (simulated) temperature display
  • Probe attached to evaporator for defrost termination sensing
  • Sensor error alarm
  • Power failure alarm
  • Door ajar alarm
  • Low battery alarm
  • Alarm validation (audible, visual, and remote alarm)
  • Alarm mute with ring back
  • Remote alarm contacts
  • Customizable alarm time delay settings
  • Forced draft air circulation
  • Keyed door lock
  • Magnetic door gaskets for positive seal
  • Integrated door handle
  • LED interior lights are safety shielded and switch controlled
  • Probe access port (3/4")
  • Stainless steel exterior
  • White-powder coated aluminum interior with 304 stainless steel floor
  • Easily cleaned smooth interior
  • Hydrocarbon natural refrigerant (R290)
  • 3 year parts and labor warranty, plus an additional 2 year compressor parts warranty Auto defrost


  • Exterior dimensions: 26 7/8” W x 33 ¾” D x 83 1/4” H with casters; 77 1/2” H without casters
  • 115V, 60 Hz, 8 Amps, 3/4 HP
  • ETL listed
  • Shipping weight: 327 lbs.
  • Adjustable operating temperature:  -27°C to -35°C (-16°F to -31°F)
  • Microprocessor temperature controller
  • Touch Screen Digital Temperature Display with user friendly interface
  • Alarm Module with battery back-up to support temperature monitoring and alarms
  • Password-protected control panel C°/F° switchable 0.1° resolution
  • Active temperature scale bar display
  • Resettable 1-point min/max history
  • Digital 24-hour temperature chart
  • Temperature data logging