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Welcome to the PQS Catalogue


The WHO Department of Essential Medicines and Health Products (EMP), Prequalification Team (PQT) is responsible for prequalifying vaccines... It also prequalifies a comprehensive range of cold chain equipment, injection devices and other products needed for safe and effective immunization delivery.  

Prequalification of immunization related equipment and devices

pdf catalogue download: Catalogue - last version 25 February 2015

Feedback form: Feedback 

E003 database in documentation guidelines: E003 database version 23 January 2015


·         PQS Independant Dossiers Annual Review, WHO Geneva, 20 - 24 April 2015

·         Next TechNet Consultation, Bangkok, Thailand 12 - 15 May, 2015.


Newly prequalified:


Solar direct drive refrigerator


Vestfrost Solutions


Solar direct drive refrigerator


SunDanzer Refrigeration Inc.


Solar direct drive refrigerator

VC 200 SDD

Dulas Solar


Solar direct drive refrigerator/freezer


Dometic Group SARL


Solar direct drive refrigerator/freezer

TCW 2043 SDD

Dometic Group SARL


Solar direct drive refrigerator

TCW 3043 SDD

Dometic Group SARL


Solar direct drive refrigerator/freezer


Dulas Solar


New: first prequalification of a Vaccine Cold Box Long Term Storage Device ARKTEKTM model YBC-5 manufactured by AUCMA in China. This device is to be used for stationary vaccine storage. It has a cold life of 44 days with a minimum rated ambient temperature of +15°C. Note that this device is subjected to a field evaluation for full validation of its prequalification status.

Newly published:

PQS Target Product Profile

New version - Enhanced refrigerator or combined refrigerator and waterpacks freezer solar direct drive: WHO/PQS/E003/TPP01.2

The purpose of this second version of the SDD Target Product Profile is to propose enhancements designed to improve future PQS prequalified SDD appliances. PQS would like to initiate a consultation process with industry and partners that will lead to revised PQS performance specifications and verification protocols.

New TPP – (1) Enhanced solar power system for vaccine refrigerator or combined refrigerator and water-pack freezer; WHO/PQS/003/TPP02.1

(2) Solar direct drive freezer; WHO/PQS/E003/TPP03.1


Request for feedback:

Vaccine cold box – freeze-free (CB05.1) and Vaccine carrier – freeze-free (VC02.1)

Vaccine cold box – long-term storage - 10 days (CB04.1)

Vaccine cold box – long-term storage - 35 days (CB03.1)

Large capacity vaccine cold box (CB02.1)


The PQS (Performance, Quality and Safety) website provides data sheets for all currently prequalified products.  Users may also download a device catalogue that includes a complete range of currently prequalified products and comprehensive guidance notes to help purchasers make informed choices. This catalogue is updated whenever a change occurs with regards to a product, a manufacture or a laboratory.    

The PQS team also accredits the independent testing laboratories.  These organizations undertake the product inspection and testing which is part of the prequalification process for devices. 

The PQS approach to equipment and device prequalification is based on three key criteria: a selected product must have performance characteristics that meet the relevant specification standards; quality and reliability characteristics that are appropriate for field conditions, and cradle-to-grave safety characteristics that ensure that no harm is caused to users, patients, or to the environment over the course of the product's life cycle.

The PQS team aims to bring WHO and UNICEF into a more productive relationship with end users, key partners and industry. We have created a three-step innovation, product development and improvement cycle:

Step 1: Wherever possible we adopt international standards as a basis for the design, development and production of each product type.  Otherwise we work with industry and partners to define appropriate design criteria.

Step 2: For each product type we develop and maintain technical specifications and related test procedures that adequately reflect programmatic and operational needs.

Step 3: We monitor each product in the market in order to assess performance, quality and safety characteristics over its life cycle from the perspective of the user, and we monitor its suitability for programmatic and operational needs. In order to support this step, there is a user feedback link on the PQS Catalogue page.  All products are subject to a formal annual review process which takes place in April each year.

All PQS operations are implemented in accordance with published Standard Operating Procedures that can be found at:

Other links


Prequalification of vaccines

WHO provides a pre-qualification service for UNICEF and other UN agencies that purchase vaccines.  The pre-qualification process determines the acceptability, in principle, of the vaccines supplied to these agencies.  The following links describe the procedures in more detail.

         A system for the prequalification of vaccines for UN supply

         Issues relating to prequalified vaccines

         Revision of the WHO vaccines prequalification procedure.

         Assessing the programmatic suitability of vaccines candidates for WHO prequalification.