Undercounter Laboratory Refrigerator - Horizon Series™

Undercounter 5 Cubic Feet Lab Refrigerator


Exterior Dimensions (in):
24" x 31.5" x 26.7"

Exterior Dimensions (mm):
610mm x 798mm x 678mm

Capacity: 5.3 cu ft / 150 liters

Shelves: 2 Adjustable Full-Size Shelves

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HLR105-GX Laboratory Refrigerator - Undercounter

GX Solutions are professional medical-grade refrigerators designed for the unique needs of critical healthcare applications such as the storage of samples, reagents and controls. Professional medical-grade refrigerators deliver optimized control in three important areas: temperature, noise and energy management. Powered by OptiCool™ technology, GX Solutions provide improved performance and user experience through energy efficiency, low noise levels, and stable storage environments to safeguard your valuable patient samples and more.

Horizon Series models feature the Horizon user interface with a LED door-mounted digital microprocessor temperature controller with a built-in alarm/monitor. GX solutions from Helmer Scientific are the first professional medical-grade refrigerators for the clinical laboratory.

Learn more about GX Solutions.

Next Steps

Sales: 800-743-5637
Support: 800-743-5637
Email: sales@helmerinc.com

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Undercounter Lab / Pharmacy Refrigerator
  • Change image Horizon Series Undercounter Refrigerator
  • Change image Horizon Series Undercounter Refrigerator
  • Change image hlr105-gx
  • Change image hlr105-gx

Designed to safely store reagents, samples and controls within an exceptional temperature-controlled environment.

  • OptiCool™ cooling system pairs a variable capacity compressor (VCC) and natural hydrocarbon refrigerants to ensure optimal temperature uniformity, recovery and stability, efficiently manage energy consumption and meet evolving environmental regulations
  • Optimized temperature uniformity, recovery and stability create best environment for medication and vaccine storage
  • Reduced energy consumption (up to 68% more efficient than traditional technology)
  • U.S. Environmental Protection Agency SNAP (Significant New Alternatives Policy) compliant refrigerants
  • Quiet operation (42 dB) creates fewer distractions and better working environment
  • Horizon user interface offers a LED door-mounted digital microprocessor temperature controller with a built-in alarm/monitor
  • Audible and visual alarms include power failure, high and low temperature alarms, door ajar, condenser temperature, and low battery
  • Superior cabinet built with high-quality construction meets or exceeds performance standards required by the medical and scientific industries
  • Adjustable powder coated shelves
  • Rear access port
  • ADA compliant
  • Rel.i™ warranty includes 5 years compressor, 2 years parts, and 1 year labor
Product Selection Tool

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Interior Volume5.3 cu ft (150L)
Temperature Range | Set point+2ºC to +10ºC | 4ºC
Interior Dimensions (w x h x d)19.5 x 19.9 x 22.8 in
496 x 505 x 580 mm
Exterior Dimensions (w x h x d)24 x 31.5 x 26.7 in
610 x 798 x 678 mm
Electrical115V 60Hz | 220-240V 50/60Hz
Net Weight174 lb | 79 kg
Storage2 ventilated shelves, adjustable 17.9 x 21.3 in
454 x 541 mm
100 lb | 46kg max capacity/shelf
DoorSolid, field-reversible
DisplayLED digital display, °C or °F
Refrigeration SystemVCC compressor-based, forced-air hydrocarbon
Noise42 dB
Energy Efficiency1.09 kWh/day
Certifications / Regulatory ApprovalsQPS (Certified to UL and CSA Standards)
IEC/UL61010-2-011 (Dec 2016)
CE 0086 RoHS
ENERGY STAR® CertifiedEnergy Star Certified

options & accessories


Integrated Electromagnetic Access Control via Keypad
 Integrated Access Control via Keypad

Horizon Access Control provides fail-secure digital keypad access. A lock is integrated into the unit and unlocked by entering a user code on the integrated keypad (Factory installed). Entry via PIN. Up to 100 user ID's may be established directly on the keypad.

Door Options

Left-Hinged Single Door

Single door refrigerators may be ordered with a left-hinged single door.

Glass Door

Dual-pane glass doors available for powder coated and stainless steel undercounter models.

Solid Ballast

simplifies temperature monitoring and helps prevent evaporation of glycol in standard probe bottle

Interior Light

LED interior light with switch.

Caster Options
  Caster Kit

Swivel, Locking Casters

Factory installed.

Caster Kit

Purchase online.Kit for installation of casters on units in the field.

Stainless Steel Options

Stainless Steel Exterior

Refrigerator may be ordered with stainless steel exterior.

Stainless Steel Interior

Refrigerator may be ordered with stainless steel interior.

Temperature Chart Recorder
 Chart Recorder

7-day, 4" inkless temperature chart recorder is factory installed. Includes battery backup and a supply of 52 charts.


Undercounter Pedestal

Undercounter Refrigerator - Pedestal

Base elevates undercounter refrigerators and freezers above the floor to a more comfortable working height. Brackets secure models to pedestal for secure installation. Feet with plastic protectors preserve surfaces.
May be used with:
Refrigerator models iLR104/HLR104, iLR105/HLR105, iB104/HB104, iB105/HB105
Freezer models iLF104/HLF104, iLF105/HLF105, iPF104/HPF104, iPF105/HPF105

Temperature Validation

Helmer offers a temperature validation package that will certify the temperature performance of the refrigerator. A multiple point temperature recorder will map the temperature inside the refrigerator chamber and a document with the data will be provided. This option must be ordered at the time the refrigerator is purchased. Includes documentation of the chamber temperature and certificate of calibration for the test instrument.

Certificate of Calibration

Certifies that monitor was calibrated with NIST (National Institute of Standards and Technology) traceable thermometer before it left Helmer facility.

Equipment Validation Guide (IQ/OQ Documentation)

The Equipment Validation Guide for Refrigerators provides documentation for Installation Qualification and Operational Qualification (IQ/OQ), as well as an outline of suggested topics for performance qualification (PQ). The Guide is provided via CD. (Note that performance of the equipment validation is the responsibility of the end-user facility or their designee).

Stacking Kit
  Stacking Kit

Purchase online. Kit provides hardware needed to stack two undercounter units..

Floor and Wall Bracket Kit

Purchase online. Designed to secure your refrigerator or freezer to the building floor and/or wall. Refrigerator has factory threaded mounting holes. Heavy-gauge, powder coated steel floor mounting brackets and cabinet anchor hardware are provided. Customer to provide floor and/or wall anchor hardware and onsite assembly.

Remote Alarms
  RA1 & RA4 Remote Alarms

Helmer alarms extend your existing system to remote locations in your facility.
Purchase RA1
Purchase RA4

Storage Trays
  Storage Trays

Purchase online. Simplify and organize your storage needs. Each tray comes with dividers and rails to customize individual storage areas.

Chart Recorder Paper
  Chart Recorder Paper

Purchase online. 4" diameter, -5º to +20ºC, package of 52.

Storage Options

Full-Size Shelves
 Fill Size Shelves

Full-size epoxy coated wire shelves are designed with side and rear guards and adjustable on 1" centers. Maximum load 100 lb per shelf. Hardware included.

Ventilated Drawers

Powder-coated ventilated drawers. Fully extendable drawer slides. Maximum load 100 lb per drawer. Hardware included.

Solid Stainless Steel Drawers
 Solid Stainless Steel Drawers

Pull out drawers are 4” high and adjustable in 1” increments. Maximum load 100 lb per drawer. Hardware included.

Locking Drawers


Locking drawers offer secure storage for your medications, vaccines, blood products, and more. The ventilated cover is secured by a key lock adding an extra layer of protection while maintaining excellent temperature uniformity.


Download Product Manuals

Visit our product manual page to download the operation or service manual.