22 ANALYTICAL AND LABORATORY EQUIPMENT
Fig. 1. Portable temperature calibration system provides a rapid and simple method of sensor checking and traceable calibration.
Temperature monitoring and sensor conformance in sterilisers
Autoclave sterilisers present temperature sensors with a very demanding operational environment in terms of high levels of pressure and moisture. Ken Jefferies reports.
T
emperature sensors specified for autoclave applications, usually
type T thermocouple or Pt100 thermometer, must be specially designed and constructed for such environments; reliability, accuracy and stability are essential for ensuring safe sterilisation procedures.
Te Labfacility Autoclave Load thermocouple is specially designed to provide the best possible accuracy and stability in the rigorous environment of clinical and laboratory sterilis er chambers. Te design has been subjected to successful, thorough evaluation by CMI Healthcare,
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including leak testing in a vacuum chamber and processing through normal, porous load sterilisation cycles. Te sensor complies with test standard HTM 2010, Clause 6.19/6.21.
Te special multiple seal construction of this Autoclave Termocouple ensures that moisture ingress is prevented, even at elevated pressure.
Te combination of a close tolerance type T thermoelement and exceptional rugged construction ensure high accuracy, high stability and long- term reliability. Alternatively, Pt100 resistance thermometer
sensors using similar construction methods can be supplied.
Validation of temperature sensors All temperature sensors used in the sterilisation process must be routinely checked and/or calibrated in accordance with procedures described in HTM 2010 Part 3 or any other national standards.
Tere are various ways of achieving such compliance, which typically involve sending the sensors to an accredited laboratory for certification, an expensive and time consuming procedure.
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