SSR

[Orfy]

Is this any good to use with a PID for a temp controller for a fermenting cabinet/kegerator?

http://my.eurotherm.co.uk/WebStore/tabi ... fault.aspx

or this?

http://uk.farnell.com/jsp/search2/brows ... 30#results

[Andy]

Generally not a good idea to use a PID for controlling a fridge compressor. The PID can operate in quick on/off cycles as it approaches the desired temperature, this is not conducive to a long fridge compressor lifespan.

Room thermostat which can do cooling also might be a better bet....

[steve_flack]

Or you could try a Love On/Off Controller

http://www.coleparmer.co.uk/catalog/pro ... 015&pfx=EW

They seem out of stock at the mo tho'

[Orfy]

I just found this for £14 inc delivery.

http://auberins.com/index.php?main_page ... ducts_id=9

[Frothy]

Most of use use these £15 PID's from ebay
http://cgi.ebay.co.uk/PID-Temperature-C ... dZViewItem
There's a discussion on here somewhere about them, they don't come with manuals although there are some on pdf around here.

I got a couple of 2nd hand SSR's on ebay for £6 a piece, the only consideration is that they are 240v and can handle enough Amps i.e. 10+ also that
their switching voltage matches the PID which is 10v

The PID's come with a thermocouple but had to change it for different one for £2.50 -
keggerator build details here->
http://www.willmottw.fsnet.co.uk/brew/keggerator/

Matt

[Andy]

Frothers - have you checked the PID switching frequency ? i.e. is it frequently turning the freezer on/off to maintain temp ? If so then you may find that the freezer won't last very long....

[Frothy]

It it quite slow. The temp raises a degree above setpoint then
it switches the compressor on it turns it over twice - buzz pause buzz
then leaves it on continuously until its returns to the setpoint.

Matt