*****The Cryoguard™ Activation Tool is required for proper activation of the Cryoguard™ M-135 Thermal Exposure Indicator. *****

M-135 Cryoguard Thermal Exposure Indicator

• Signal temperature: -135°C
• Activated indicator turns red when exposed to temperatures at or above -135°C
• Used for monitoring products shipped or stored in dry shippers or liquid nitrogen that need to be kept at or below -135°C
• Popular for monitoring heat sensitive laboratory specimens, vitrified oocytes, sperm, embryos, cord blood, bone marrow & more
• Recommended for monitoring environments at or below -160°C
• Cryoguard indicators have a shelf life of eight months. The shelf life applies whether the indicator is activated or unactivated. An expiration date appears on the label on each indicator.