So-Low Explosion Proof Manual Defrost Freezer

Category Explosion-Proof Refrigerators & Freezers
Manufacturer So-Low
Country of manufacture the United States of America

Designed to meet National Fire Protection Agency (NFPA) and OSHA guidelines for the frozen (-20°C) and refrigerated storage of volatile and non-volatile materials in Hazardous Locations, Class 1, Division II, Group C & D.
Power cord is not included. Final power connections at site must be hardwired to meet local codes. 

All spark generating electrical components and connections (compressor, thermostat) are isolated and sealed in vapor-proof enclosures. Electrical wiring is hardwired for additional safety measures. These units are not intended for use in general clinical or research laboratories. See Flammable units.

So-Low's various Explosion Proof / Manual Defrost Freezers, Refrigerators, and Combination units, offer a diverse range of options to fit your needs for Explosion Proof products. Ranging from 11 cubic feet to 30 cubic feet, these units are ideal for products of any size. Two inch solid urethane foam insulated doors, sturdy cam-lift hinges, and "lock-open" feature for "hands-free" access provide a secure and sturdy environment.


  • 22 Gauge Cold Roll Steel Exterior
  • 26 Gauge Galvanized Steel Interior
  • High Luster Baked Enamel Surface Coating
  • 2-3/8 inch (6cm) Urethane insultation
  • 2-Inch Solid Urethane Foam Insulated Doors
  • Sturdy Cam-Lift Hinges With Lock-Open Feature
  • 6-Inch Adjustable Legs
  • CFC-Free Refrigerant and Insulation
  • Exterior Adjustable Mechanical thermostat
  • Manual Defrost
  • UL Listed

Please note: So-Low explosion proof refrigerators and freezers are manufactured at the time the order is placed and go through extensive testing before they are released. A 4-6 week lead time should be expected.

Some of the accessories/options available for this product are factory installed and must be purchased at the same time your So-Low freezer / refrigerator is ordered. Please add them to your cart with your freezer / refrigerator before checkout so that they may be included with the submission of your order to the manufacturer for installation during production.

Key Attributes
Min. Temperature -15°C to -25°C
Cubic Feet 30
Alarms No
Controls Manual
Defrost Manual
Electrical 115 V / 60 Hz / 7A
Warranty (years) 1
Weight (lb) 375
Width (in) 35
Depth (in) 34
Height (in) 78


Manufacturer Specifications

Temp Range:

 -18°C to -25°C


30 cubic ft. / 849 liters

w x d x h

35'' x 34'' x 78''

w x d x h

32'' x 22.5'' x 65''

Temp Control Exterior Adjustable Mechanical
Door Single Solid, locking
Casters Four Adjustable
Shelves 4 Fixed Epoxy Coated
Insulation Polyurethane foam
Refrigerant R404A CFC free
Compressor 1/3 hp
Evaporator Cold Wall
Thermostat Exterior Adjustable Mechanical
Defrost Manual
Voltage 115/60/1
Amps/Breaker  7/15
Supply Plug none/ hardwired
Weight 375lbs.
Warranty 12 months parts and labor
Meets NFPA and OSHA guidelines for Hazardous Locations, Class 1, Division 1, Division II, Group C & D.

Are the So-Low Explosion Proof Manual Defrost Freezers also suitable for flammable material storage?

Yes, they are.


What safety designs make this unit suitable for use in a Class 1, Division II, Group C & D environment?

The unit is spark-proof, meaning that all spark generating electrical components and connections (compressor, thermostat) are isolated and sealed in vapor-proof enclosures such that they will not ignite any flammable / explosive vapors unless they are damaged. This is also why the unit must be hard-wired and the unit does not come with a power cord: standard electrical outlets carry a risk of sparking and, therefore, ignition of vapors.


Are there special installation considerations for an explosion-proof freezer?

Yes. The freezer must be hardwired to the building's electric and cannot be connected to an electrical outlet via a plug, as that carries a sparking risk. Furthermore, the room / area around the freezer must also be explosion proof. For instance, any nearby equipment also must be explosion proof, any lighting and / or other fixtures must be explosion-proof, and there cannot be any electrical outlets.


What is the weight limit on the shelves?

Each shelf has a weight limit of 50 pounds.


Can the shelves be removed or can the freezer be built without shelves in it?

No. The fixed shelves are permanently in place and cannot be moved nor can the unit be built without the shelves, as refrigerant lines run through the shelves to help ensure more even temperature throughout the chamber.


What kind of refrigerant is used in the So-Low Explosion Proof Defrost Freezers?



The So-Low Explosion Proof Manual Defrost Freezers are identical to the American Biotech Supply Hazardous Location Freezers, which are less expensive. They are literally the same freezers, with the same warranty and certifications. Just get the cheaper ones.


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