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Bho purging heat source?
- Thread starter keifsweat
- Start date
You're getting close with the second one, for this purpose it needs to be a PID controller, here's the cheapest Graywolf could find that will suffice,
https://www.icmag.com/ic/showpost.php?p=6117344&postcount=40
Here's a package deal,
http://www.ebay.com/itm/DIGITAL-PID...034?pt=LH_DefaultDomain_0&hash=item3cd5eada22
https://www.icmag.com/ic/showpost.php?p=6117344&postcount=40
Here's a package deal,
http://www.ebay.com/itm/DIGITAL-PID...034?pt=LH_DefaultDomain_0&hash=item3cd5eada22
what is the difference between the 2 of em... or the 1st.... and will these other controlers work also just in a diff way? i feel if u can make a dimmer switch do the damn thang...i prob can with one of these....now if we can find some chinese silicone industrial heat mats/blankets
A real PID controller will "come groovin' up slowly..." while an on/off thermostat will apply full power right up to Set Point. You will get major overshoot of Set Point with an on/off thermostat.
http://en.wikipedia.org/wiki/PID_controller
The dimmer will work well, get some temperature strips, and you're good to go, you just need to keep an eye on it.
RLC-60-90/120-10 In Stock $13.00 16 Temperature Levels Label, 90 to 120°F/32 to 49°C (2°F increments) in package of 10
http://www.omega.com/pptst/RLC-60.html
They can be peeled off and reused.
B
BredForMeds
shit I wish some1 would make cheaper vacuum chamber universal lids.;. I am not going to pay 90-120 for a lid. wen I can just build one.. but the thing is . i wish someone would put together a DIY kit.. just like a pressure cooker. and all pieces needed to make one yourself. and sell them made and not made.. lol
what i did was kept my lid super simple one hole for suction cup...kept eveything else in the lines...my last lid was just plexi....blew up in my face...poly carbonate now...my thoughts were adding holes or threading anything in would cause many uncontrollable stresses on lid causing it imo to weaken it..having done it this way... i would change how my lines are put together ...i would prob go 3/4 +on polycarbonate next time... due to bowing in 1/2 inch
hey yall i just found these silicone pads from mcmaster-carr they seem more affordable than others and they do have units that come with temp controllers for 157.00 at bottom of page
http://www.mcmaster.com/#catalog/119/527/=q6eag1
it is a thermostat controlled 50 -425 degrees f.....but not pid ....on another note.. they have the units for 79 bux 12x12 medium wattage without controller. for any interested
http://www.mcmaster.com/#catalog/119/527/=q6eag1
it is a thermostat controlled 50 -425 degrees f.....but not pid ....on another note.. they have the units for 79 bux 12x12 medium wattage without controller. for any interested
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The "Heavy Duty Silicone-Rubber Heat Sheets" look to be Briskheats, and the "Flexible Silicone-Rubber Heat Sheets" look to be Omegas. You need to find out the details of the temperature controller, it could just be a very inexpensive on/off thermostat.
Here's another distributor,
http://www.oemheaters.com/c-515-silicone-rubber-heaters.aspx
SRFR-12/2 5 Weeks $77.00 Round silicone rubber heater, 12 in. diameter, 2.5 W/in2 watt density, without PSA (this is what I have under my aluminum five gallon stock pot vacuum chamber)
SRFG-1212/2-P In Stock $77.00 Silicone rubber heater 2W/in2, with PSA (this is 12" x 12")
http://www.omega.com/pptst/SRFR_SRFG.html
they charge the same price 79 all the way thru for whatever watt/sq in.... 2 week wait and they do sell affordable units with built-in controller for 160. just NOT PID. so very similar units, actually when i spoke to mcmaster they said they are from briskheat and you could expect about a 5 degree overshoot with these controllers.
so for 2 more dollars you get
less wait
built-in temp option
wattage options
and adhesive backing option
but one way or another it still seems best route to go ebay for PID if you want perfect control
so for 2 more dollars you get
less wait
built-in temp option
wattage options
and adhesive backing option
but one way or another it still seems best route to go ebay for PID if you want perfect control
MMAjay420
Member
id love some more info on how you did the brake bleeder purging..... been wanting to try that
Couldn't be happier with the heating rate of the 2.5W/in2 Briskheat mats, although they are not as flexible side to side, so required some extra effort to mold to the 4" columns on both the Mk IV and V's.
Delivery was not good from them either.
I got the TA4-RNR Mypin temperature controller from Rakuten.com, which has only a relay, instead of a mA outputput. I use a wall wart 12VDC supply to supply the DC for the relays, and control the power to it with the automated controls.
The Mypins were only $16.96 each from NY, but after porking me $39.95 for shipping and handling five controllers, my actual cost each was about $25.
I used Type K thermocouples on all of them, with a Chinese finger cuff over braid, and exposed wire tips. I got them locally from Branom Instruments, but recommend getting them elsewhere, as they don't stand behind their own screw ups and are not the best price available.
I picked up 10 of the 40A Kodak solid state relays off E-Bay at $5 each, but can't readily put my finger on the source.
I don't use the huge heat sink provided with the one SH posted, but clamp it to the metal enclosure or an aluminum bar instead.
The Hoffman enclosure that I re-purposed is the most expensive part of the system, so will depend heavily on what you use. I chopped up a 12 gauge extension cord for the power and three 16 gauge extension cords for the outputs.
Since I didn't get a picture before shipping either one, I will ask the users to send me one. Suffice to say that they will bring an empty column up to 150F in three minutes and a packed wet one in about 14 minutes. It shaved 30 minutes off the Mk V recovery time.
The thermocouple controller combination overshoots the temperature less than three degrees of set point on the way up and closer after it settles in.
I'm happy enough to be designing using silicone mats in my larger systems.
My thanks to BVV for taking my idea and coming up with a commercial product.
Here's another vendor,
http://www.ebay.com/itm/HeatVac-Ket...711?pt=LH_DefaultDomain_0&hash=item35dcd8b29f
i use a foot warmer mat/pad my sister got from kmart on sale a long time ago. I used to put a few clothes over it so it wouldnt get to hot, but now im using a cloning thermostat and got it directly under my aluminum chamber. I dont think its been getting hot enough so every once in a while i take the temp taker thing away and let it heat up a lil extra, then put it back underneath the chamber.
