CRYOmark™ is single-use Ultra Low temperature recorder / indicator which irreversibly change its color from white to red by reaching or exceeding color changing temperature. It is especially designed for  Freezer temperature recording / monitoring such as frozen products quality proof,  freezer temperature monitoring and cold chain logistic monitoring.

• Detect and signals abnormal temperature rise happened under refrigeration and freezing temperature by color change.

• Color Change Temperature: -20 °c to 9°c

• Store temperature: ambient temperature

• Simple activation method even under refrigerated environment

• No battery, No calibration required.

• Eco friendly solution

Product variation

                                             50pcs/package

Activation Method   

1.   Prior to use, CRYOmarker should be precooled below predetermined temperature for predetermined time.

       - Color change temperature is +9, -4 and -10 °C : Should be precooled at least for 12 hours below -18 °C.

       - Color change temperature is -20 C°: Should be precooled at least for 12 hours below -40 °C.

2 .  To activate CRYOmarker, bend it lightly once until you hear snapping sound and feel light shock, with gloves on. CRYOmarker starts monitoring temperature.

3.  Set where temperature monitoring is required.

4  CRYOmarker changes its color from white to red to indicate temperature rise. When more than half area of a CRYOmarker is reddened, Temperarure Limit EXCEED.

 ♦ Shock of Bending activation may cause faintly redden CRYOmarker. However, this does not mean temperature Limit EXCEED.

Usage Example  

• Frozen Food quality proof

About us

"From the Ocean to Outer Space"

  NICHIYU GIKEN KOGYO CO., LTD. was fully financed and established by NOF CORPORATION in December 1980. Inheriting the know-how accumulated by TEIKOKU PYROTECHNICS MANUFACTURE CO., LTD., which had lasted from 1938 to 1970, and that of NOF CORPORATION, Kawagoe Plant which succeeded it, we have promoted research and development in various fields in parallel with manufacturing of pyrotechnics and temperature indicating materials and other products. 

  With on ever-expanding scope of our business, our products have been patronized in different fields widely ranging from the deep seabed to outer space, as indicated by our catch phrase, ""From the Ocean to Outer Space,"" contributing to safety and reliability of various systems.

  In order to not only swiftly respond to ever-advancing needs and supply useful products to society, but also ensure safety and reliability, we would like to fulfill social responsibilities as a technology developing corporation and move forward to materialize further development.

1. Activities: Production and Sales of Diversified Products:

1-1. Chemical Products
           -  Temperature indicators 
           -  Radioactive Indicators
           -  Sterilization bags and chemical indicators
           -  Reinforcement materials for construction 
           -  Exothermic welding powder and molds
           -  Combustible materials
           -  Gas generators

1-2. Machinery and Electrical Equipment
           -  Ocean exploring equipments
           -  Power transmission failure indicators

1-3. Pyrotechnical Devices
           -  Rocket Pyrotechnics

"Recognizing temperature at first sight with color change"
We have been developing and manufacturing various kinds of indicator labels according to customer needs since 1965.
Our products are used in various fields such as Electricity industries, Railroads, Food companies and so on.

Keyword: frozen products

Quality proof indicator for frozen products