About 5 years ago I built 5 vaporizers using 200 Watt 120V cartridge
heaters. I measured the temperature of the aluminum block at various times.
Attached is a picture of the heater and a table of temperatures and times.
I started with 200 Watt for 30 seconds and then reduced the power to 50
Watts. Two ml of water was used to simulate the 2 gm. of oxalic which would
be used in the field. Attached is a photo of the heater and a table of the
temperatures.
Time (sec) Temp (deg C)
0 22 Power at 200 Watt.
10 29
20 50
30 72
Power reduced to 50 Watt
40 91
Dehydrates and water boils at 103 Deg C
50 105
60 113
90 131
120 146 Sublimes at 157 Deg C
150 159
180 172 Decomposes at 190 Deg C
240 193
300 211 Power shut off
360 204
420 180
480 163
540 147 End
Best regards,
Donald Aitken
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