---
title: Interlock Pass-thru Pharmacy Refrigerators for Your USP <797> Clean Room
description: The interlocking pass through refrigerator is designed to enhance pharmacy workflows, help maintain a cleaner compounding environment, and assist in USP <797> compliance.
image: https://blog.helmerinc.com/hubfs/Interlock%20Pass-thru%20Pharmacy%20Refrigerators%20for%20Your%20USP%20_797_%20Clean%20Room%20(2).png
---

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- Interlock Pass-thru Pharmacy Refrigerators for Your USP <797> Clean Room

# Interlock Pass-thru Pharmacy Refrigerators for Your USP <797> Clean Room

 Posted on Nov 14, 2019 by Miranda Schroeder

![Interlock Pass-thru Pharmacy Refrigerators for Your USP _797_ Clean Room (2)](https://blog.helmerinc.com/hs-fs/hubfs/Interlock%20Pass-thru%20Pharmacy%20Refrigerators%20for%20Your%20USP%20_797_%20Clean%20Room%20(2).png?width=700&name=Interlock%20Pass-thru%20Pharmacy%20Refrigerators%20for%20Your%20USP%20_797_%20Clean%20Room%20(2).png)

Introducing the market’s first Interlocking Pass-through refrigerator with i.Lock™ technology from Helmer Scientific. The interlocking pass through refrigerator is designed to enhance pharmacy workflows, help maintain a cleaner compounding environment, and assist in USP <797> compliance.

 

Due to the interdependence of the various rooms or areas that make up a compounding facility, it is essential to carefully outline and control the dynamic interactions permitted between areas and rooms.

As described in USP <797>, a pass-through is defined as an enclosure with seals on interlocking doors that are positioned between two spaces for minimizing particulate transfer while moving materials from one space to another.

**Airlocks and interlocking doors can be used to facilitate better control of air balance** between a higher classified area and an area of lesser air quality, or between a classified area and an unclassified area.

USP <797> states that i**f a pass-through is used, it must only be opened one door at a time; both doors must never be opened at the same time**.

The i.Lock™ technology from Helmer Scientific forces the electronic lock to engage on one side of the pass-thru cabinet when doors on the opposite side are open. Therefore, prohibiting both sides of the refrigerator from being open simultaneously.

##### Other Blogs You Might Be Interested In... 

- [USP Receives Appeals on General Chapters <795>, <797>, and <825> Postponing the Official Dates Until Further Notice](https://blog.helmerinc.com/usp-receives-appeals-on-general-chapters-795-797-and-825-postponing-the-official-dates-until-further-notice)
- [How the Revised USP Chapters <795> and <797> are Impacting Pharmacy](https://blog.helmerinc.com/how-the-revised-usp-chapters-795-and-797-are-impacting-pharmacy)
- [Proposed Revision of General Chapter <797> Pharmaceutical Compounding – Sterile Preparations is now Posted and Open for Comments](https://blog.helmerinc.com/usp-797-revisions-comments)
- [How to Improve USP <797> Clean Room Workflows](https://blog.helmerinc.com/how-to-improve-usp-797-clean-room-workflows)
- [Ephraim McDowell Regional Medical Center Pharmacy Completes Project to Increase Efficiency and Meet USP 797](https://blog.helmerinc.com/ephraim-mcdowell-usp)

The Interlock pass-thru refrigerator from Helmer Scientific helps support compliance, maintain clean room air quality, and enhance pharmacy workflows.

For more information, please visit the link below.

##### [![Learn More »](https://no-cache.hubspot.com/cta/default/1862406/ccec9253-3e0b-4a9d-92e1-78ca693adfad.png)](https://cta-redirect.hubspot.com/cta/redirect/1862406/ccec9253-3e0b-4a9d-92e1-78ca693adfad)

![Miranda Schroeder](https://blog.helmerinc.com/hubfs/Blog/authors/MirandaAllen.jpg)

### Written by [Miranda Schroeder](https://blog.helmerinc.com/author/miranda-schroeder)

Helmer designs, manufactures, and sells reliable medical-grade refrigeration. Miranda specializes in the pharmacy segment in regards to proper cold storage for refrigerated and frozen medications and vaccines.

[LinkedIn](https://www.linkedin.com/profile/preview?locale=en_US&trk=prof-0-sb-preview-primary-button)

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