WarmMark Duo

The ShockWatch WarmMark® Duo is a cost-effective, disposable temperature indicator that monitors temperatures during shipping and storage, indicating whether goods have been subjected to unacceptable conditions. These reliable temperature indicators provide visual evidence of exposure to unacceptable temperature levels, allowing you to determine if product quality has been compromised. It is ideal for products with a known temperature stability curve and expiration characteristics at certain time and temperature combinations.

WarmMark Duo Indicates the duration of temperature exposure at two different activation temperature levels. If the windows in the WarmMark Duo indicator stay white, there’s no problem. But if the temperature climbs beyond two specific thresholds, a red color moves through the windows of the indicator with the passage of time. If the temperature returns to below the threshold, the color stops moving. In this way, handlers and shippers can know how long the product was exposed above the threshold temperature.

  • Monitor for the length of time above 10°C and for brief excursions above 34°C
  • Know if a product has been exposed past a threshold and check for high temperature spikes.

Features

Dual Threshold Time/Temperature indicator

Field-armable with pull tab

Specifications

Activation temperatures

50°F and 93°F 10°C and 34°C

Response Time

Up to 3 days, 8 days, 14 days Up to 3 days, 8 days, 14 days

Size

0.75 in × 3.88 in × 0.06 in 9 mm x 98.1 mm x 1.5 mm

Adhesive

Pressure sensitive Pressure sensitive

Storage Condition

Unused product must be stored in an environment with temperature below the response temperature for optimal shelf life Unused product must be stored in an environment with temperature below the response temperature for optimal shelf life

Shelf Life

Two years from date of sale Two years from date of sale

Part Numbers

Selection Guide

50℉ 93℉
Window 1 3 days --
Window 2 8 days --
Window 3 14 days --
Window 4 -- Within 30 minutes
10℃ 34℃
Window 1 3 days --
Window 2 8 days --
Window 3 14 days --
Window 4 -- Within 30 minutes

How It Works

The WarmMark Duo monitors the 10°C (50°F) with 3 indication windows. The WarmMark Duo will keep track of how long the temperature is exposed aboved 10°C. Window 1 shows it has been exposed up to 3 days, window 2, up to 8 days and window 3, up to 14 days.

The circular indication window will show that it has been exposed to temperatures above 34°C (93°F).