So-Low Platinum Series Ultra Low Upright Freezers

Category Upright Lab Freezers
Manufacturer So-Low
Country of manufacture the United States of America
Average customer rating based on 2 reviews

The Platinum Series comes with an advanced PID control system. With a 4.3" color touch screen operating interface with embedded SCADA (supervisory control and data acquisition) and LAN features. Upright style Ultra-Low Temperature Freezers are designed for a variety of uses including shrink fitting, and ultra cold storage of product down to -85°C. Freezer Sizes range from 13 to 30 cubic feet capacities.

Manufactured in Cincinnati Ohio, So-Low Ultra-Low -85°C freezers are produced with high quality craftsmanship, heavy-duty materials, and over 50 years of experience. These freezers use a cascade refrigeration system, providing reliable and durable environmental conditions for your product’s vital temperature requirements. So-Low Ultra-Low freezers are available in wide variety of sizes and styles, to accommodate for each customers required conditions. Combined with our nation-wide service network, our Ultra-Low Freezers have various options for additional temperature recording devices, providing the highest level of quality temperature transcription.

So-Low's Superior Construction

Ultra low freezers have a 16-ga. exterior (cold rolled steel). Interiors are 14 gauge vs. competitions 16 gauge.Ultra low freezer interiors are galvanized, non-corrosive steel. Galvanized steel conducts temperature more efficiently than stainless steel. This creates less stress on compressors making them run cooler and longer.

So-Low's Digital Control

So-Low is the only ultra low temperature manufacturer to utilize a dual display digital temperature control. A red LED display indicates the actual interior chamber temperature while a green LED display located directly below the red display shows the actual setpoint temperature. This will give assurance that the freezer is operating at the correct temperature range whereas other manufacturer's temperature controls show only the actual temperature and not both the setpoint and actual temperature.

So-Low's Dependability

Laboratory professionals all over the world have recognized the dependability and efficiency of So-Low Ultra Low Freezers, the first to combine all of these performance features and deliver a level of quality construction, reliability and value unequaled anywhere in the world.Performance testing is your assurance of So-Low Ultra low freezers' dependability. Every freezer is fully tested under the most demanding conditions for seven days. The constant ultra-low setpoint operationg temperature is assured in warm temperature environments. Dependability is backed up by a 12 month warranty.Technical assistance is provided by a Nation-Wide-Network of service companies.

Please note: So-Low Ultra Low 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 -40°C to -85°C
Cubic Feet 13 to 31
Alarms Yes
Controls Digital
Defrost Manual
Electrical 115/60/1 - 208/60/1 - 230/60/1
Warranty (years) 1
Weight (lb) 725 to 1050
Width (in) 36 to 60
Depth (in) 36.25
Height (in) 79.25


Manufacturer Specifications   
. PN85 -13 PN85 -18 PN85 -22 PN85 -25 PN80-28    PN80-30  

Temp Range:

 -40°C to -85°C

 -40°C to -80°C


13 Cu ft / 370L

18 Cu Ft / 505L

22 Cu ft / 626L

25 Cu ft / 710L

28 Cu ft / 792L

31 Cu ft / 877L


4 Shelves (5 Compartments)

Rack Capacity







w x d x h

36'' x 33.5'' x 79.5''

37'' x 36.25'' x 79.5''

42'' x 36.25'' x 79.25''

50'' x 36.25'' x 79.5''

53'' x 35.5'' x 79.5''

59.5'' x 36.25'' x 79.5''

w x d x h

20'' x 22'' x 51.25''

23'' x 26'' x 51.25''

28.5'' x 26'' x 51.25''

34'' x 25'' x 51.25''

38'' x 25'' x 51''

42'' x 25'' x 51.25''

Weight (lbs): 725 775 850 950 1000 1050
Temp Control Touch Screen control, Displays set point and chamber temperature, Hi/Low Alarm W/ Email and SMS notification, Alarm Relay Dry Contacts, Power Failure Dry Contacts, Battery Back-up, Viewable Temperature graph, Data logging downloadable via USB or FTP, Multi-Level Security, VNC Remote Access via PC / smart devices
Alarm System Battery operated alarm system will emit an audible and visual signal when there is a mechanical or electrical failure. The alarm has an over and under temperature setting, alarm silencing feature. 
Remote Alarm Relay A relay for a remote alarm hook-up is also provided. 
Access Port Mounted in left hand side of the cabinet will be a 1/2" porthole leading into the chilling chamber, complete with plugs.
Refrigeration System So-Low cascade type. Two hermetic motor compressors.  These compressors are the heavy duty industrial type:  air cooled. The motors are sealed in oil for life and have thermoguard overload protection.  Compressors start in sequence to protect the unit from overloading. CFC & HCFC free refrigerants. So-Low cascade type. Two hermetic compressors. CFC & HCFC free refrigerants.
Construction Chamber is 14-ga. zinc coated galvanized steel. Exterior is 16-ga. steel. Powder coated cool gray finish.
Voltages Available 115/60/1 - 208/60/1 - 230/60/1 - 220/50/1
Technical Support Supplied by Nation-Wide-Network of service companies.
ETL Electrical Approval

Are the Platinum Series Ultra-low Freezers UL listed?

No, but they are ETL listed, which is a similar marking from a different organization. Just like UL listing, ETL listing serves as proof of product compliance to North American safety standards in both the US and Canada.


Is there a keyed door lock on the Platinum Series ULT Freezers?

Not by default, but one can be added at no additional chage. If you would like a keyed lock on your freezer, just let us know.


What is the approximate noise level of each freezer?

62 dB.


What is the temperature variance of the So-Low Platium Series Ultra Low Freezers under normal conditions?

The temperature variance is approximately +/- 7-10°C.


How long do the Platinum Series ULT Freezers take to cool back down to the setpoint temperature after opening?

Approximately 15-30 minutes depending on the load.


What refrigerants are used in the So-Low Platinum Series Ultra Low Upright Freezers?

R-404A, R-508B, and R-170.


Are these refrigerants acceptable under the EPA's Significant New Alternatives Policy (SNAP)?

Yes, they all are listed as acceptable under the EPA's Substitutes in Very Low Temperature Refrigeration.


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Customer reviews

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So-Low Platinum Series Ultra Low Upright Freezers Accessories