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bringing cold chain innovation

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bringing cold chain innovation

Proven Since India's Polio Eradication Programme in 1998.

Introducing World's First Miniaturised Technology for Vaccine Vial Monitor (VVM) Labels

Since 1998, Lisaline Asia has been pioneering cold chain monitoring in India. We introduced a miniaturised VVM to help safeguard vaccines during the country’s polio eradication programme. Today, we continue that legacy with reliable, field-proven monitoring solutions trusted across the pharma and healthcare cold chain. 

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Heatmarker time temperature indicators, Vaccine Vial Monitor VVM

What is a cold chain vaccine vial monitor?

What is a VVM in a cold chain?

A Vaccine Vial Monitor (VVM) is a time temperature indicator label applied to vaccine vials. It gives a clear visual sign of whether the vaccine has stayed within the safe temperature range that preserves its potency.

The Vaccine Vial Monitor label reacts to heat exposure over time. As heat builds up, the colour darkens. This change is irreversible. Once the label reacts and changes colour, it cannot go back to its original shade, even if the vial is stored correctly afterwards.

A VVM label matters because a vial can look completely normal and still be damaged. Heat exposure isn’t always visible and the Vaccine Vial Monitor confirms it with a clear visual sign. Every time the product is exposed to heat, the label darkens a little more. When it reaches its final shade, the vaccine has been damaged beyond safe use.

Lisaline Asia supplies the HEATmarker VVM, a miniaturised, self-adhesive label. It is small enough to be applied directly onto an individual vial or vial cap. It gives health workers a heat-exposure check at the point of use.

HeatMarker TIme Temperature Indicators, Vaccine Vial Monitor VVM

Advantages of Using VVM

What are the benefits of a Vaccine Vial Monitor?

Self Adhesive, Miniaturised Label

Being self adhesive, the VVM applies directly onto the vial with no extra equipment. Its miniaturised size means it fits on a single vial or vial cap, allowing every unit to be monitored individually.

Irreversible, Permanent Colour Change

The colour change in a VVM is irreversible. The shade does not revert back even when the vial returns to its original temperature, so the record of heat exposure stays accurate and permanent.

Clear Visual Sign

The colour change gives a clear, reliable signal on whether the product has been affected or not. This makes the vaccine vial monitor useful for identification at every stage, including point of delivery. Potency or damage of goods can be easily confirmed.

Identifies Gaps in Cold Chain 

A pattern of early colour change across vials from the same spot, route, or storage point often points to a specific weak link, like a leaky refrigerator or an unreliable transit leg. This helps teams trace cold chain issues to their source.

Reduces Vaccine Wastage

Health workers no longer need to discard a vial just on suspicion of a cold chain break. The VVM clears that doubt with clear proof, confirming whether the vaccine has been exposed to damaging heat or is still safe to use.

Builds Compliance and Trust

Vaccine Vial Monitor labels are recognised and often required by WHO and UNICEF, which makes them a credibility point in compliance driven buying decisions. Using vaccine vial monitor labels signal products meet global procurement standards.

How does a Vaccine Vial Monitor Work?

Application

The self adhesive, miniaturised label is applied directly onto the vaccine vial or vial cap by the manufacturer.

Continuous Tracking

Once applied, the VVM tracks the vial's temperature exposure throughout its shelf life.

Colour Change on Heat Exposure

Whenever the vial is exposed to heat above the safe range for preserving potency, the label's shade darkens. This darkening builds up over time and does not reverse.

Reading the VVM

At any point, health workers compare the inner square of the label to the outer reference ring. If the square is lighter than the ring, the vaccine is safe to use.

Reaching the Discard Point

Once the inner square matches or turns darker than the reference ring, it means the vial has exceeded the safe heat exposure limit. The vaccine should no longer be used.

Heatmarker Time Temperature Indicators, Vaccine Vial Monitor VVM

Miniaturised Vaccine Vial Monitor Labels for Continuous Monitoring, Right Up to the Point of Delivery

Since 1998. Trusted From Manufacturing to Point of Delivery.

Lisaline Asia introduced miniaturised vaccine vial monitor labels in India, starting with the country’s polio vaccine programme in 1998.

Self adhesive and easy to apply directly onto the vial or vial cap. A vial can look completely normal and still be affected by heat exposure. The VVM removes that doubt, giving you a clear visual signal, no confusion, no guesswork.

Get Trusted VVM Labels for Your Cold Chain
HEATmarker VVM — Interactive Guide
Interactive Guide

How to Read HEATmarker Vaccine Vial Monitor (VVM)?

Drag the slider to see how the HEATmarker label changes as heat exposure builds over time.

Surrounding Surface — fixed amber, from product reference

Active Square — starts light, darkens with heat

Safe to Use
The inner square is clearly lighter than the outer ring. Heat exposure has been minimal and the vial is safe to use.
Stage 1
Stage 2
Stage 3 –
Discard Point
Stage 4 –
Beyond Discard

Why Choose Lisaline Asia for your Vaccine Vial Monitor Labels in India?

Since 1998, Lisaline Asia has led cold chain monitoring innovation in India. We achieved a landmark first, introducing the world’s first miniaturised Vaccine Vial Monitor (VVM) technology to India. This breakthrough was built specifically to monitor the temperature exposure of vials for the country’s Polio Eradication programme, at a scale no one had attempted before.

Today, we supply HEATmarker VVM and other temperature indicators, manufactured by Temptime, a Zebra Technologies company. These are irreversible temperature indicators. Once a vial has been exposed to unsafe heat, the label captures it permanently and gives a clear, unmistakable visual sign at the point of delivery, with no equipment or training needed to read it.

Over 25 years later, we continue to lead with the same trusted approach. Our cold chain monitoring solutions now serve the pharmaceutical, logistics, food, and life sciences sectors across India, built on the same foundation of accuracy, simplicity, and safety that shaped our first breakthrough.

Choosing authorised supplier guarantees authentic high quality vaccine vial monitor labels with proper labelling, backed by trust and used in major cold chain facilities across the world.  Get official manufacturer support along with calibration certificate and compliance documentation. .

Get ISO 17025 (NABL) accredited calibration both in-lab and on-site, WHO PQS-certified product validation, thermal mapping, installation with IQ/OQ validation, preventive maintenance contracts, and 24/7 online support. 

We provide extended product support, after sales service, spare parts coordination, technical assistance and customer service across India, South Asia and Middle East.  

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VVM in Cold Chain Monitoring

FAQS- Vaccine Vial Monitor Labels

Lisaline Asia serves the pharmaceutical, vaccine, and healthcare sectors, covering pharmaceutical manufacturing, warehousing and distribution, vaccine and biologicals monitoring, hospitals and laboratories, and blood banks and transfusion centers. 

What is the normal colour of a Vaccine Vial Monitor VVM?

A fresh, unexposed vaccine vial monitor VVM shows a white inner square inside a light purple outer circle. The square stays lighter than the circle for as long as the vaccine is safe to use. As heat exposure builds up, the square darkens. Once the square matches or turns darker than the circle, the vaccine must be discarded.

Yes, a Vaccine Vial Monitor like HEATmarker VVM can be applied on the vial cap of the vaccine. It uses miniaturised technology so is small enough to be applied and self adhesive. The vaccine vial monitor (VVM) is applied on the vial cap for vaccines that must be discarded at the end of the session or within hours of opening. It keeps the monitor visible until the vial is opened. For multi-dose vials that can be used across sessions, the vaccine vial monitor (VVM) is placed on the vial instead. This makes it visible for the vial’s full working life. 

Vaccine Vial Monitor Labels are used on virtually all UN-procured vaccines (UNICEF, WHO/PQS-listed), since they’re a standard prequalification requirement.

  • Stage 1: Inner square lighter than the outer circle, no heat exposure yet. Vaccine is fine to use.
  • Stage 2: Square has started to darken but is still lighter than the circle. Vaccine is still usable, use these first.
  • Stage 3 (discard point): Square matches the outer circle. Vaccine must be discarded.
  • Stage 4 (beyond discard point): Square is darker than the circle. Vaccine must be discarded.

Vaccine cold chain monitoring makes sure vaccines stay within their required 2°C to 8°C range, from manufacturing until they’re administered to the patient. This protects their potency and safety. At Lisaline, we believe every patient deserves a vaccine that protects them, not one damaged by temperature exposure. That’s why we offer HEATmarker VVM, which tracks the cumulative heat exposure a vaccine vial receives across its entire journey.

To monitor a vaccine vial, a VVM label is applied directly to the vial cap or the vial itself. It stays with the vaccine throughout the supply chain, from manufacturing until it’s administered to the patient. As heat exposure builds up beyond the safe limit, the inner square of the label darkens. This color change is permanent and irreversible, giving teams a clear, reliable way to confirm whether a vaccine is still safe and effective or has been damaged.

Using a Vaccine Vial Monitor requires no technical knowledge. It is self adhesive and easily applied to the vial. It continues monitoring throughout from manufacturing till it is administered  to the patient. You do not need to do anything. The square on the label darkens shade everytime the temperature exceeds the safety threshold. You can confirm whether the products are effective and usable or have been damaged during any stage just by looking at the label. This makes it easy to spot excursions, find gaps in cold chain. A vaccine vial monitor VVM also gives a clear visual sign at the point of delivery to confirm whether the products being delivered are safe and suitable for patient use or have been damaged. 

Yes. HEATmarker is a Vaccine Vial Monitor (VVM) label, manufactured by Temptime, a Zebra Technologies company. It’s fixed directly to the vaccine vial to track cumulative heat exposure and show whether the vaccine is still safe to use. Lisaline Asia is the official supplier of these miniaturised vaccine vial monitor (VVM) labels in India. 

A colour change in the vaccine vial monitor from its original colour that is white means that the product has been exposed to temperatures that could damage its potency. Since the HEATmarker VVM measures the cumulative heat exposure for a vaccine vial, each time the vaccine is exposed to unsafe temperatures, the shade darkens. The change is irreversible, permanent and doesnt not revert to the original colour even if the vaccine returns to its original temperature. Once the VVM label reaches its darkest shade, it means that the vaccine vial has been damaged completely and is not  fit for use anymore. The colour change gives a clear proof whether the vaccine is safe or has been exposed at any stage of the journey from manufacturing to patient administration including the point of delivery. 

The HEATmarker VVM is one of the best vaccine vial monitor label in India. It is supplied by Lisaline Asia in India and manufactured by Temptime, a company under Zebra Technologies. This VVM label features miniaturised vaccine vial monitor technology. Since 1998, Lisaline Asia introduced the world’s first miniaturised vaccine vial monitor technology which was used in the polio eradication programme in India. These labels are small, self adhesive and can be applied anywhere directly on the vial or its cap. They monitor the temperature of the vials right from manufacturing till patient administration. Whenever the temperature rises beyond the safety thresholds, the colour  of the square inside the label changes irreversibly darkening the shade. When the label reaches its darkest shade, it shows that the vial is completely damaged and unusable for patient use. It gives a clear indicator whenever teams see at any stage of the journey even at the point of delivery. By looking at the VVM you can clearly confirm whether the products are usable or have been damaged. To buy these vaccine vial monitor labels contact our expert team at Lisaline Asia. 

Most vaccines must be stored between 2°C and 8°C throughout the cold chain, from manufacturing to the point of use. A few, like OPV, need frozen storage at the upper levels of the chain before reaching health facilities. HEATmarker VVM monitors vaccines across this entire 2°C to 8°C journey, flagging any cumulative heat exposure that could put potency at risk.

A vaccine vial monitor changes shade each time the vial is exposed to temperatures beyond the safe threshold. This gives teams early warning of a cold chain excursion, well before the vaccine actually becomes unusable. Because the color change is cumulative and irreversible, it doesn’t reset even if the vial is returned to proper storage, so the exposure is never missed. This lets teams spot the gap in the cold chain quickly, take corrective action, and in many cases still save the batch, protecting both the vaccine and the patient it’s meant for.

You can buy miniaturised vaccine vial monitor labels- HEATmarker VVM from Lisaline Asia. We are the official supplier of these labels manufactured by Temptime, a company under Zebra Technologies. These self adhesive labels can be applied directly to the vaccine vial and measure the temperature of these vials throughout from manufacturing till administration and signal breach with a colour change. These labels measure cumulative heat exposure during the period and provide a clear visual sign whether the products are usable or have been damaged at the point of delivery. In order to buy these labels online in India, you can contact our team through the form on this page. We will get back to  you to discuss how to meet your requirements. 

Most misreadings come down to handling, not the label itself. Using a genuine, WHO PQS-prequalified VVM matched to the correct vaccine type, checking it under good, consistent lighting, and training staff to compare the inner square directly against the outer circle all reduce reading errors. Vials should also be stored in a cool, dry place, away from direct sunlight and moisture, since these can affect how clearly the label reads. Avoiding label damage and pairing VVMs with continuous cold chain temperature monitoring adds a further layer of accuracy.

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For more details on range of value added services CLICK HERE or Mails us : service.support@lisalineasia.com

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