Pouch sealer calibration is the step most clinics rely on the manufacturer to perform once, and then trust for years. But a sealer's displayed temperature is only useful if it matches the temperature at the sealing bar, and that match can drift with use. A short, repeatable check keeps the seal within specification without waiting for a service visit.
How do you verify a pouch sealer's temperature?
Use a calibrated temperature indicator or a sealer test strip designed for the purpose, and compare the reading at the bar with the temperature the sealer displays. Run the check after warm-up, not immediately after switching on, and repeat it after any change to the roll of pouch material. If the two readings diverge beyond the manufacturer's tolerance, the sealer needs adjustment or service before the next sealing session.
| Check | Method | Frequency |
|---|---|---|
| Displayed vs actual temperature | Calibrated indicator at the bar | At each service, and after a fault |
| Warm-up time | Compare first seal with a later seal | Start of each day |
| Seal strength | Peel test on a sample pouch | Start of each day, and after changes |
| Bar condition | Visual check for wear or residue | Weekly |
Why does sealer temperature drift?
Because the sealing bar, the protective cover over it and the sensor that reports temperature all age at different rates. Residue from pouch film builds on the bar, the cover wears, and the sensor's response can shift. The sealer then displays a temperature that no longer matches the surface doing the sealing, which produces seals that are weaker or stronger than intended without any obvious fault.
What should a peel test tell you?
A peel test opens a sealed pouch and assesses whether the seal releases cleanly without tearing the paper. A seal that opens too easily points to low temperature or pressure; a seal that tears the paper points to excessive heat or dwell. Both results are indications to check the sealer's settings and its calibration, not to change pouch brand.
How often should the sealer be serviced?
Follow the manufacturer's interval and bring it forward after heavy use. At each service, ask for the temperature calibration to be verified and recorded, since a service that leaves no calibration record answers less than it appears to. A clinic with the calibration record can also show a reviewer that the sealer was maintained, not merely used.
What should be documented?
Keep a simple log with the date, the sealer identity, the displayed temperature, the measured temperature where checked, and the peel test result. That log lets a clinic see a trend rather than a single bad day, and a slow drift is far easier to correct than a sudden failure discovered through a failed load.
Sealing and monitoring supplies: constant heat pouch sealer, 12 mm seal, sterilization pouches 10 x 15 inch (25 x 38 cm), 200 pack, and the 24-hour biological indicator 50-pack. To start with monitoring, request the BI 5-pack sample.
Download the free printable compliance log sheet and run the log sheet generator. Ordering for a clinic, lab or care home? Wholesale and multi-site ordering covers case pricing and account setup, and the B2B wholesale collection lists the lines stocked for institutional buyers. For site-specific guidance, ask a sterilization compliance specialist. Reselling? become a distributor.
Related reading
Sterilization compliance hub · Sealer calibration and peel-test records · Three common pouch sealing errors
Frequently Asked Questions
How do I know if my pouch sealer is at the right temperature?
Compare a calibrated reading at the sealing bar with the temperature the sealer displays, after warm-up. If the two differ beyond the manufacturer's tolerance, the sealer needs adjustment or service.
How often should a peel test be run?
At the start of each day and after any change to the sealer or the pouch roll. A seal that opens too easily or tears the paper indicates a setting or calibration problem.
Why does sealer temperature drift over time?
The sealing bar, its protective cover and the temperature sensor age at different rates, and film residue builds on the bar. The display can then diverge from the surface doing the sealing.
CliniEco Medical is a licensed medical device establishment (MDEL #35334).
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