Formaldehyde Helix Test Indicator Strips (Refill)

Specifically developed for process challenge devices used in the routine monitoring of low-temperature steam and formaldehyde (LTSF) sterilizers, Formaldehyde Helix Test Indicator Strips (Refills / Device-Free) are designed to verify whether this toxic and low-penetrating sterilant achieves adequate efficacy inside hollow lumens. Inserted into compatible, serviceable formaldehyde test PCDs, these indicator strips exhibit a distinct color change only when critical process parameters—sterilant concentration, cycle temperature, and relative humidity—are concurrently achieved. Upon cycle completion, the strips can be mounted onto log sheets or documentation forms to ensure regulatory compliance and record operational safety.