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SciTemp Sensor Autoclave Test Protocols
Parker/SciLog DN 3131: SciTemp Temperature Sensor, Post Autoclaving Sensor Response
Objective: Test SciTemp Sensor Response after Repeated (3) Autoclaving Cycles. Autoclaving
Conditions: Sterilization Temperature: 257ºF (125ºC); Sterilization Time: 30min., Pressure: 19 psi,
Drying Time: 30min.
For accurate performance, sensors should not be autoclaved more than two times.
Pre-Autoclave Post Trial 1 Post Trial 2 Post Trial 3
SciTemp, Luer NIST SciTemp NIST SciTemp NIST SciTemp NIST SciTemp
Sensor ID T1 T2 ∆T T1 T2 ∆T T1 T2 ∆T T1 T2 ∆T
A1-210164-0108
25.07 25.00 0.07 25.01 25.03 -0.02 24.88 24.96 -0.08 25.05 24.96 0.09
A1-210165-0108
25.07 25.02 0.05 25.01 25.05 -0.04 24.88 24.96 -0.08 25.05 25.05 0.00
A1-210166-0108
25.07 25.04 0.03 25.01 25.06 -0.05 24.88 24.98 -0.10 25.05 NR
A1-210167-0108
25.07 25.05 0.02 25.01 25.04 -0.03 24.88 24.91 -0.03 25.05 24.98 0.07
A1-210168-0108
25.07 25.06 0.01 25.01 25.05 -0.04 24.88 24.94 -0.06 25.05 25.07 -0.02
Group Average
25.03 25.05 24.95 25.02
Group SD*
0.02
0.01 0.03 0.05
* SD = Standard Deviation NR = No and/or Erratic Response
Test Protocol: Prior to autoclaving, factory-calibrated SciTemp sensors (5) were removed from inventory and
temperature-tested at 25.00 ºC in a temperature equilibrated glove box. The "out-of-box" sensor response data is
listed as "Pre-Autoclave" in the table above. The SciTemp sensor air-vent as well as the 8-pin sensor connector
were sealed with autoclavable tape (Cole-Parmer P/N: EG-08277-62). The sensors were placed into a paper bag
(6 1/2"x 4" x12 3/8"), sealed with tape and placed in a Tuttnauer EZ9 Autoclave. The following conditions were
maintained throughout the three autoclaving trials: 1.Sterilization Temperature: 257ºF (125 ºC); 2.Sterilization
Time: 30 min; 3.Sterilization Pressure: 18 psi, 4.Drying Time 30 min.
After each trial, the SciTemp sensors were placed in a temperature equilibrated glove box for 45 minutes. Utilizing
a peristaltic pump, a temperature equilibrated solution (0.100 molar KCl, 25 ºC) was re-circulated through the in-
line SciTemp sensor assembly. An in-line NIST-traceable thermistor was used as a temperature reference.
Four of the five SciTemp sensors survived the three autoclaving trials while maintaining good sensor accuracy
and precision during the initial autoclave cycles. All trial measurements were carried out with the original factory
calibration. No sensor re-calibration were made before, during or after the three post-autoclave trials.
Summary: Sensor accuracy becomes increasingly compromised after the multiple autoclave cycles. For
accurate performance, sensors should not be autoclaved more than two times.
NOTE: Parker sensors have been designed for disposable, single-use applications. However, with
proper care, the sensors can be re-used while maintaining good accuracy and precision. If required,
sensors can be re-calibrated. CAUTION: Do Not Exceed Maximum Pressure of 60 psi.
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