Elitech LogEt 1: WHO PQS-Prequalified Temperature Data Logger for Reliable Cold Chain Monitoring
In pharmaceutical and vaccine cold chain logistics, temperature monitoring is not simply about recording a number. It is about creating reliable, traceable evidence that temperature-sensitive products have remained within their required conditions throughout storage and transportation.
For organizations operating across pharmaceutical logistics, vaccine distribution, clinical research, and other temperature-sensitive supply chains, choosing a temperature data logger that meets internationally recognized performance requirements can significantly strengthen cold chain compliance and data reliability.
Elitech LogEt 1 is a WHO PQS-prequalified user-programmable temperature data logger, listed under IMD-PQS Code E006-083 and applicable to WHO PQS specification E006/TR05.1.
This article explains what that WHO PQS qualification means, the key performance characteristics of LogEt 1, and how the device can support temperature monitoring throughout the cold chain.
What Is WHO PQS?
The World Health Organization’s Performance, Quality and Safety (PQS) program establishes performance specifications and verification requirements for products used in immunization programs and vaccine cold chains.
Within the WHO PQS E006 category, temperature monitoring devices include thermometers, temperature recorders, data loggers, freeze indicators, event loggers, and other monitoring technologies used throughout the cold chain.
For temperature data loggers, WHO PQS specification E006/TR05.1 covers user-programmable electronic temperature data loggers intended primarily for cold chain studies and commissioning activities. The specification covers both replaceable and non-replaceable battery designs, as well as devices with internal or external sensors.
This distinction is important.
A WHO PQS-prequalified data logger is not simply a product that has been “tested for temperature accuracy.” It has been evaluated against a defined WHO performance specification and verification protocol.
Elitech LogEt 1: WHO PQS E006-083
Elitech LogEt 1 is listed by WHO PQS as:
· Product: LogEt 1
· IMD-PQS Code: E006-083
· Product Category: E006 Temperature Monitoring Devices
· Product Type: User-programmable temperature data logger
· PQS Status: Prequalified
· Applicable Specification: E006/TR05.1
· Verification Protocol: E006/TR05.VP-1
· Verification Report: TUV E8A 114320 0001 Rev. 00
· Manufacturer: Jiangsu Jingchuang Electronics Co., Ltd.
· Country of Manufacture: China
· PQS Validity: May 31, 2027
The current WHO PQS database also identifies LogEt 1 as a prequalified product under E006/TR05.1.
For cold chain professionals, this provides an independently recognized reference point when evaluating a temperature logger for vaccine and pharmaceutical monitoring applications.
Why WHO PQS E006/TR05.1 Matters
WHO PQS E006/TR05.1 defines performance requirements for user-programmable electronic temperature data loggers used for study and commissioning purposes throughout the vaccine cold chain.
Among the key requirements are:
Temperature Accuracy
The specification requires an accuracy of:
±0.5°C or better from -20°C to +20°C for at least 12 months following calibration.
After 12 months without recalibration, the requirement becomes ±1.0°C or better.
Elitech LogEt 1 is listed with a temperature accuracy of ±0.5°C.
For temperature-sensitive products, this level of accuracy provides a practical balance between measurement precision and operational reliability.
Wide Operating Temperature Range
LogEt 1 is specified for operation from:
-30°C to +70°C
according to its WHO PQS product listing.
This wide operating range allows the logger to be used across a variety of temperature-monitoring scenarios, including refrigerated storage, cold chain transportation, and environmental monitoring applications.
The WHO E006/TR05.1 specification itself requires logger electronics to function from -30°C to +55°C.
Flexible Recording Intervals
One of the advantages of LogEt 1 is its programmable recording interval.
According to its WHO PQS listing, the device supports recording intervals from:
0.17 minutes to 1,440 minutes
with a maximum recording duration of 180 days.
This provides substantial flexibility for different monitoring scenarios.
For example:
· Short recording intervals for transportation studies
· Longer intervals for warehouse monitoring
· Extended monitoring for cold chain qualification
· Equipment commissioning and performance studies
· Pharmaceutical storage monitoring
Rather than forcing every application into a single recording schedule, users can configure the logger according to the monitoring objective.
Large Data Storage Capacity
LogEt 1 provides memory capacity for up to:
300,000 temperature readings
according to the WHO PQS product record.
This is particularly useful when users need to collect high-resolution temperature data over extended periods.
A larger memory capacity can also reduce the need to download or reset the logger frequently, making the device suitable for longer monitoring projects.
Non-Replaceable Battery for Long-Term Deployment
LogEt 1 uses a 3V coin-cell battery with a non-replaceable battery design.
The WHO PQS listing specifies:
· Battery type: 3V coin cell
· Battery: Non-replaceable
· Battery shelf life: 2 years
· Activated battery life: 6 months
The non-replaceable design simplifies deployment and eliminates the need for users to open the device and replace the battery during operation.
For controlled monitoring programs, this can also help reduce the risk of accidental configuration changes or physical damage caused by battery replacement.
IP67 Protection for Demanding Cold Chain Environments
Cold chain logistics can expose monitoring devices to condensation, moisture, ice, and other environmental conditions.
Elitech LogEt 1 is listed with an IP67 ingress protection rating.
This provides an additional layer of protection for demanding temperature-monitoring environments.
For pharmaceutical logistics operations, environmental protection is an important part of overall logger reliability—not just temperature accuracy.
LCD Display for Easy On-Site Verification
LogEt 1 uses an integrated LCD display and visual alarm system.
This allows users to check monitoring information directly on the device without necessarily relying on a separate display unit.
For warehouse personnel, quality teams, and logistics operators, an on-device interface can make routine inspections faster and easier.
User-Programmable Temperature Monitoring
Unlike fixed-function temperature indicators, LogEt 1 is designed as a user-programmable temperature data logger.
Users can configure monitoring parameters according to the requirements of the application.
The WHO product listing identifies LogEt 1 as “User Programed” and notes that configuration can be performed through online configuration or Elitechlog software.
This makes the device suitable for different monitoring protocols rather than a single predefined temperature profile.
PDF Reports Without Stopping the Logger
One of the practical features highlighted in the WHO product listing is the ability to generate PDF reports without software or a cable, with the PDF report available without stopping the logger.
For quality assurance and cold chain documentation, this can simplify the process of turning raw temperature measurements into a readable monitoring report.
A typical workflow can therefore be:
Configure → Monitor → Review → Generate Report → Document
without requiring a complex data-processing workflow.
More Than Temperature: Shipment Condition Visibility
LogEt 1 is also listed with an optional light intensity/illuminance monitoring function, which can help identify whether a package may have been opened during shipment.
This expands the potential role of the logger beyond conventional temperature monitoring.
For selected logistics applications, users may need to understand not only whether temperature remained within limits, but also whether the shipment experienced an unexpected opening or handling event.
Up to Five Temperature Limit Levels
LogEt 1 supports up to five levels of configurable limit values, according to its WHO PQS product description.
This can be useful when different alert thresholds are required within the same monitoring program.
Instead of relying on a simple single-threshold alarm, users can configure multiple temperature limits according to their monitoring strategy.
Data Protection and Backup
Temperature records can become critical quality documentation.
If data is lost during transportation, the problem may extend beyond the monitoring device itself—it can affect the ability to demonstrate whether temperature-sensitive products remained within acceptable conditions.
LogEt 1 includes a backup/shadow log function designed to help prevent data loss, along with password protection intended to protect data security and prevent misuse.
These features add an additional layer of protection to the monitoring workflow.
WHO PQS Compliance: What It Means for North American Buyers
For North American pharmaceutical, laboratory, healthcare, and cold chain organizations, WHO PQS prequalification should be understood as an independent product qualification against a specific WHO performance specification.
For LogEt 1, that specification is:
WHO PQS E006/TR05.1 — User-programmable temperature data loggers.
The WHO PQS framework specifically distinguishes different categories of temperature monitoring devices based on their intended applications.
Therefore, LogEt 1 should be described accurately as a:
WHO PQS-prequalified user-programmable temperature data logger
rather than as a WHO PQS electronic shipping indicator.
This distinction is important when specifying equipment for a particular cold chain application.
LogEt 1 at a Glance
|
Feature |
Elitech LogEt 1 |
|
WHO PQS Code |
E006-083 |
|
PQS Category |
E006 Temperature Monitoring Devices |
|
Applicable PQS Specification |
E006/TR05.1 |
|
Product Type |
User-programmable temperature data logger |
|
PQS Status |
Prequalified |
|
PQS Valid Until |
May 31, 2027 |
|
Temperature Accuracy |
±0.5°C |
|
Operating Range |
-30°C to +70°C |
|
Recording Interval |
0.17–1,440 min |
|
Maximum Recording Time |
180 days |
|
Memory |
Up to 300,000 readings |
|
Battery |
3V non-replaceable coin cell |
|
Battery Shelf Life |
2 years |
|
Activated Battery Life |
6 months |
|
Protection Rating |
IP67 |
|
Display |
LCD |
|
Alarm |
Visual |
|
Programming |
User-programmable |
|
Verification Protocol |
E006/TR05.VP-1 |
|
Verification Report |
TUV E8A 114320 0001 Rev. 00 |
|
Quality Standard |
ISO 9001:2015 |
Product specifications above are based on the WHO PQS product listing for LogEt 1.
Built for More Reliable Cold Chain Monitoring
Temperature-sensitive products require more than a thermometer.
They require a monitoring system that can:
· Measure temperature accurately
· Record data continuously
· Store large amounts of historical information
· Provide clear alarm information
· Protect data from accidental loss
· Generate usable reports
· Support different monitoring intervals
· Operate reliably across demanding environmental conditions
Elitech LogEt 1 combines these capabilities with WHO PQS prequalification under E006/TR05.1, providing an internationally recognized reference for temperature data logger performance.
For cold chain studies, pharmaceutical logistics, vaccine monitoring, storage qualification, and temperature-sensitive shipment verification, LogEt 1 provides a practical and flexible approach to temperature data collection.
Frequently Asked Questions
Is Elitech LogEt 1 WHO PQS certified?
LogEt 1 is listed by WHO PQS as Prequalified, under IMD-PQS Code E006-083. Its applicable specification is E006/TR05.1 — User-programmable temperature data loggers.
What is the WHO PQS specification for LogEt 1?
LogEt 1 is qualified under WHO PQS E006/TR05.1, with verification protocol E006/TR05.VP-1.
Is LogEt 1 a WHO PQS electronic shipping indicator?
No. WHO lists LogEt 1 specifically as a user-programmable temperature data logger under E006/TR05.1. Electronic shipping indicators are covered under a separate PQS specification, E006/TR07.4.
How accurate is LogEt 1?
The WHO PQS listing specifies ±0.5°C accuracy for LogEt 1.
How long can LogEt 1 record temperature data?
The WHO PQS listing specifies a maximum recording time of 180 days, depending on configuration and recording interval.
Is the battery replaceable?
No. LogEt 1 uses a non-replaceable 3V coin-cell battery. The WHO listing specifies a two-year battery shelf life and six-month activated battery life.
Is LogEt 1 waterproof?
LogEt 1 is listed with an IP67 ingress protection rating.
Conclusion
In temperature-sensitive logistics, reliable monitoring is the foundation of cold chain visibility.
Elitech LogEt 1 (WHO PQS E006-083) combines user-programmable monitoring, ±0.5°C accuracy, long-duration recording, large memory capacity, IP67 protection, visual alarms, and flexible reporting capabilities.
Most importantly, its WHO PQS prequalification under E006/TR05.1 provides an independently recognized benchmark for its use as a user-programmable temperature data logger within the vaccine cold chain.
For organizations looking for a flexible temperature monitoring solution backed by an internationally recognized PQS qualification, Elitech LogEt 1 offers a practical solution for cold chain studies, qualification, transportation monitoring, and temperature-sensitive logistics.
Elitech — Intelligent Monitoring for a Safer Cold Chain.
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