Suitable for chemical monitoring of the sterilization effect of 121 ℃ and 20min pressure steam in medical institutions.

① Class IV chemical indicators at 121 ℃, monitoring key parameters of the pressure steam sterilization process at 121 ℃;

② Yellow turns black, resulting in irreversible temperature;

③ Waterproof design, resistant to interference from condensation water;

④ Easy to use, clear and accurate result interpretation.

ST402 type 200 pieces/box