DIY Scace2

This forum is for discussion of group temperature measurement using of off-shelf devices such as the Scace and/or the creation of home brew devices such as the "Endo I"
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symbology
God Shot
Posts: 117
Joined: Thu Jan 13, 2011 12:38 pm

DIY Scace2

Post by symbology » Sun May 15, 2011 11:43 pm

I had been thinking about building a pressure gauge to verify my brew pressure. I also wanted to check my temperature calibration. What I ended up doing was taking one of my spare PF's and I built a Scace2.

I tested it out today and everything was working great. Then, I noticed that water was flowing inside of the thermocouple wire. (I was afraid this was going to happen.) I need to figure out how to get that sealed up. I have an idea or two, but was wondering if anyone that has already built a DIY scace had any pointers.

How this was created.

List of items needed.

PF body
Liquid Filled Pressure Gauge 1/4" NPT fitting
1/4" NPT Nipple (4" long) (to connect pressure gauge)
1/4" NPT Female Coupler (to connect pressure gauge)
1/8" NPT Mini Needle Valve (to regulate water flow) Works ok, not great. Might try something else in the future.
1/8" NPT Nipple (1" Long)
1/16" Parker 2MSC1N fitting (for getting the thermocouple wire into the PF)
Small silicon hose to use as a seal in the 2MSC1N fitting
Cheap PF Handle (Hollow)
Cheap Car Wash Sponge (about 2.5" thick) used for the faux puck.
Velcro Ties

Special Tools Required:
1/4" NPS Tap
1/8" NPT Tap
1/16" NPT Tap
**Thermocouple of your choice**

I started by drilling a small hole in the PF at the bottom of the threads (where the handle goes). This will allow the pressure to move inside of the PF handle. I then drilled out and tapped the same location to accept the 1/4" nipple. Since the thread pitch is very, very close between the original 12mm and the 1/4 NPT nipple cutting the threads was no problem. I ended up needing a 1/4" NPS tap becuase the NPT tap did not cut the threads deep enough. Even though the NPS is a straight tap and does not have a tapper, it worked out well. The hole is not deep enough to allow the NPT tap to cut the threads enough.

I then tapped the PF exit hole from the bottom and the top using the 1/8" NPT tap. This will allow for the installation of the 1/8" needle valve on the bottom and the 1/8" x 1" NPT nipple on the top.

Then, between the PF exit hole and the handle I drilled and tapped a hole for the parker 2MSC1N fitting using the 1/16" NPT tap.

Assembled everything and all was well until I noticed the water flowing into the thermocouple wire.
Attachments
sc2_inside.jpg
sc2_inside.jpg (118.48 KiB) Viewed 1963 times
sc2_bottom.jpg
sc2_bottom.jpg (99.74 KiB) Viewed 1963 times
sc2_full.jpg
sc2_full.jpg (141.3 KiB) Viewed 1963 times
S1V2, Macap M7D Grinder

peter
Ristretto
Posts: 83
Joined: Wed Jun 02, 2010 9:13 pm

Re: DIY Scace2

Post by peter » Mon May 16, 2011 10:40 pm

Very cool, and very creative.
Vivaldi II, Compak K10 WBC, SC/TO, Ambex YM-2K

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slo
Barista
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Joined: Mon Aug 31, 2009 6:51 pm
Location: Montreal, Canada

Re: DIY Scace2

Post by slo » Thu May 19, 2011 6:31 am

Nicely done indeed!
Makes me want to install a thermocouple permanently to my pressure calibration tool... But it is used so little...But it would be so useful... but ... You get the idea :-?
Vivaldi II, Multiple (a collection really) Lever machines
Currently on deck grinders: Mythos and MXKR
Backup grinders: Robur, Major.
Toper Cafemino Electric and Poppery 1 roaster

I have a serious problem ... Can you guess what?

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