POL-EKO Freezers Natural Convection

Secure bio-samples down to –86 °C in POL-EKO’s ZLN-UT ultra-low freezers. Vacuum-insulated VIP panels pair with a cascade refrigeration system and PID control to maintain a rock-steady -86 °C … -50 °C range while eco-friendly R290/R170 refrigerants keep Global Warming Potential to single digits. Choose Smart or Smart PRO touch-screen controllers for at-a-glance monitoring, network logging and alarm notifications.

Smart vs Smart PRO controllers

Feature	Smart	Smart PRO
4.3″ colour touchscreen	✔	–
7″ colour touchscreen	–	✔
LAN + USB ports	✔	✔
Built-in Wi-Fi	–	✔
LabDesk data-logging licence	Optional	Included
DIN 12880 over-temp class	2.0	3.2
Both versions ship network-ready via Ethernet; Smart PRO simply adds wireless connectivity and the larger display.

Why choose a ZLN-UT ultra-low freezer?

• VIP vacuum insulation cuts energy use and speeds pull-down to -80 °C.
• CO₂ back-up port (option) safeguards the load during outages.
• Access port Ø20 mm & lockable double doors support validation probes while minimising frost ingress.
• LAN/USB logging on all models—plus Wi-Fi & email alerts on Smart PRO.
• Eco-friendly R290 / R170 refrigerants keep GWP to just 3 & 6.
• Heavy-duty castors let you roll the unit up to a biosafety cabinet or cryo-lab bench.

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Pick the Capacity That Fits Your Workflow

Model	Usable Volume*
ZLN-UT 200 VIP	259 L pol-eko.com.pl
ZLN-UT 300 VIP	345 L pol-eko.com.pl
ZLN-UT 500 VIP	482 L pol-eko.com.pl

*Chamber capacity quoted by POL-EKO; working volume is slightly lower.

Whether you need a compact 259 L biobank freezer or a twin-door 482 L powerhouse for high-throughput labs, the ZLN-UT line scales seamlessly with your storage and throughput needs.

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Typical Applications

• Long-term biobank & clinical-trial sample storage at -80 °C
• Vaccine, biologic & enzyme preservation
• Pre-freezing steps before transfer to -150 / -196 °C cryogenic storage
• Material frost-resistance & thermal-shock testing
• QA/QC sample archiving in pharma & food labs