3M™ brand MonitorMark™ Time Temperature Indicators
Providing a visual history of time temperature exposure

MonitorMark™ Time Temperature Indicators not only signal when a threshold has been exceeded, but provide an easy-to-read visual signal to estimate the minimum amount of time a product has spent above the threshold temperature.

MonitorMark™ indicators features a high contrast indicator that turns blue as a result of exposure to rising temperatures. The indicator is irreversible, providing a permanent record of temperature exposure even after temperatures return to acceptable levels.

Placed inside secondary shipper boxes of temperature-sensitive products during shipment and storage, the indicators provide information to assist in estimating time and temperature exposure.

3M™ Freeze Watch™ Indicators
Providing a visual indication of freezing temperature exposure

3M™ Freeze Watch™ Indicators are ideal for monitoring pharmaceutical products -including vaccines, medicines and chemicals -that run the risk of being damaged when exposed to freezing temperatures during shipment and storage.

The patented design of Freeze Watch indicators consists of highly sensitive indicating liquid inside a specially designed ampule. When exposed to freezing temperatures, the ampule fractures, releasing a liquid. The liquid irreversibly stains a paper behind the ampule, indicating that product has been exposed to unacceptable temperatures so product quality testing should be performed.

Freeze Watch indicators are available at two temperature levels, -4°C (25° F) and 0°C (32°F), to accommodate differing product sensitivities.

ColdMark™ Freeze Indicators
Monitor Control With Just a Glance

ColdMark™ Freeze Indicators put you in control even after your product has been shipped. With ColdMark, your customer know at a glance if the product has been exposed to abusive temperatures during shipping or storage. The ColdMark indicator accurately shows if your product has been exposed to cold below 32°F / 0°C. (Other response temperatures are also available.) Importantly, ColdMark is guaranteed to work within plus or minus 1 degree of its response temperature, the highest level of accuracy available in the industry. ColdMark Freeze Indicators are a strategic, value-added plus for your product, providing a permanent record that assures your customers of consistent quality.