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Temperature Probe
438 Evolution 200 Series User Guide Thermo Scientific
Routine Maintenance
• Clean probes immediately after each measurement and before storing them. See Cleaning
Temperature Probes.
• Check stopper O-rings regularly for wear and replace them when necessary. See Replacing
Stopper O-Rings.
Related Topics
Cleaning Temperature Probes
Replacing Stopper O-Rings
Maintenance
Cleaning Temperature Probes
Clean temperature probes frequently to avoid contaminating subsequent samples. Wipe off
spilled chemicals immediately.
To clean a probe, rinse the tip with water and then with methanol or isopropyl alcohol and air
dry.
Related Topics
Routine Maintenance
Replacing Stopper O-Rings
Maintenance
Replacing Stopper O-Rings
Check stopper gaskets and O-rings regularly for wear and replace them when necessary. The
square stopper has two gaskets and internal O-ring. The round stopper has an internal
O-ring.
A 4 mm screw (at least 3 mm long) is required to remove the liner that supports the internal
O-ring.
Y To replace the internal O-ring (round or square stopper)
1. Insert the 4 mm screw several turns into the stopper base, and use it to pull the liner out
of the base (leave the screw in the liner).
Note Use of the temperature probe with corrosive samples or extreme temperatures can
cause O-rings to break down faster.
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