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Old 11-14-2009, 03:16 AM   #1
jakeshivers
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Default LabJack hardware costs

I'm looking into doing the automated brewery thing. A lot of people seem to have LabJack on thiers. What are the costs? I've calculated roughly $300 to have the U3, an amplifier (the sales rep said I needed one if I were to have multiple thermocouples), and two thermocouples.

U3-LV
Stock: In Stock
Price: $108.00

LJTick-InAmp $49.00

(2) EI1034 Temperature Probe $100

Does this seem accurate and reasonable?

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Old 11-14-2009, 08:34 AM   #2
Plan9
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I can't speak for the amp, but you could make cheaper/identical temp probes.

The spec sheet states that it's a LM34
$6.50
http://www.HobbyEngineering.com/H1752.html

Derrin sells stainless probes
$5.75
http://www.brewershardware.com/probeEnds.htm

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Old 11-14-2009, 06:37 PM   #3
jakeshivers
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Default temp probes

Interesting! I didn't realize they were so simple. Well that should shave about $70 off my costs. Thanks.

Any ideas why I need an amp?

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Old 11-14-2009, 06:57 PM   #4
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I don't know anything about that product, but have you looked into the BCS-460? http://www.embeddedcontrolconcepts.com/

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Old 11-16-2009, 07:22 PM   #5
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The amp is needed for thermocouples with the U3. If you use a silicon type sensor (e.g. LM34) instead, then you don't need an amp.

We had suggested the LM34CZ or LM34DZ from Jameco for $5 or $2 each, or even order some free samples from national.com. Then use epoxy, plasti-dip, a metal tube, or whatever else works to make a beer-proof probe.

Pump control was also brought up, so we suggested an SSR from Jameco also. The 176719 is only $20 and handles up to 40A @280VAC. If you don't need so much current capability, you could look at the 176698 or 175214.

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