Irreversible Warmup Indicators.
Final rept. 1 Aug 72-30 Jun 73,
ARTECH CORP FALLS CHURCH VA
Pagination or Media Count:
Irreversible warmup indicators indicating in the 10 -15 c region were developed and prototypes manufactured. The device comprises a gelatin capsule filled with an organic liquid which freezes at the temperature to be indicated. The liquid contains a dye and the capsule is maintained in contact with absorbent paper. When frozen the contraction of the liquid draws air in through the joint in the capsule and upon thawing a portion of the liquid is exuded through the joint, coloring the paper and thereby providing the desired indication. Practical tests, including attachment to blood bags, establish a reliability of better than 98. Author
- Medical Facilities, Equipment and Supplies