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 *********************************************** The BEE-L mailing list is powered by L-Soft's renowned LISTSERV(R) list management software. For more information, go to: http://www.lsoft.com/LISTSERV-powered.html