Today's Message Index:
----------------------
1. 03:04 PM - OT: Temperature Control Relay (Jon Finley)
2. 04:16 PM - Re: OT: Temperature Control Relay (Robert L. Nuckolls, III)
3. 04:47 PM - Re: OT: Temperature Control Relay (Jon Finley)
4. 07:33 PM - Re: OT: Temperature Control Relay (Bob McCallum)
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Subject: | OT: Temperature Control Relay |
=0AHi all,=0A =0AVery off topic. =0A =0AI am looking for a small 12 VDC t
emperature control relay. I want to enable the relay at ~120 degrees F. an
d disable it at 100 degrees F. The maximum relay capacity can be quite sma
ll (I can add a larger relay if required).=0A =0AMy searches are overwhelme
d with AC versions and very expensive versions. This seems like something
that should be available for about $10.=0A =0AThanks very much!=0A =0AJon
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Subject: | Re: OT: Temperature Control Relay |
At 05:02 PM 6/19/2010, you wrote:
>Hi all,
>
>Very off topic.
>
>I am looking for a small 12 VDC temperature control relay. I want
>to enable the relay at ~120 degrees F. and disable it at 100 degrees
>F. The maximum relay capacity can be quite small (I can add a
>larger relay if required).
>
>My searches are overwhelmed with AC versions and very expensive
>versions. This seems like something that should be available for about $10.
What you're looking for (I think) is a thermostat
that closes on temperature rise at 120 and does not
open until the temperature falls below 100F.
Here's a part for clothes dryers.
http://tinyurl.com/25ksfkq
It's SKU number is 39076 on this page
http://tinyurl.com/2gy4tma
My local washer repair parts store
shows it as an LD120 for $5 net/$11 list.
It's a single pole, double throw device
so you can use it for open or close on
temperature rise.
Bob . . .
Message 3
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Subject: | OT: Temperature Control Relay |
Hi Bob,
Very, very close!
This is to operate a pump that circulates solar heated water thru my hot
tub. What you found is functionally correct, my only additional requirement
is that I can mount the sensor in water (in the solar tubes). Since I am
learning, it might be good for the set points to be adjustable. However; I
am after cheap so that is certainly not a requirement.
Thanks!
Jon
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Robert L.
Nuckolls, III
Sent: Saturday, June 19, 2010 5:19 PM
Subject: Re: AeroElectric-List: OT: Temperature Control Relay
At 05:02 PM 6/19/2010, you wrote:
Hi all,
Very off topic.
I am looking for a small 12 VDC temperature control relay. I want to enable
the relay at ~120 degrees F. and disable it at 100 degrees F. The maximum
relay capacity can be quite small (I can add a larger relay if required).
My searches are overwhelmed with AC versions and very expensive versions.
This seems like something that should be available for about $10.
What you're looking for (I think) is a thermostat
that closes on temperature rise at 120 and does not
open until the temperature falls below 100F.
Here's a part for clothes dryers.
http://tinyurl.com/25ksfkq
It's SKU number is 39076 on this page
http://tinyurl.com/2gy4tma
My local washer repair parts store
shows it as an LD120 for $5 net/$11 list.
It's a single pole, double throw device
so you can use it for open or close on
temperature rise.
Bob . . .
Checked by AVG - www.avg.com
06:35:00
Message 4
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Subject: | OT: Temperature Control Relay |
Jon;
Assuming your circulation system is plastic pipe, can you put a short piece
of thin wall metal (copper or aluminium) tube in the water loop at a
convenient location and clamp the thermostat offered by Bob to its exterior
wall??? The temperature differential through the tube wall would be
insignificant and you would then have a readily accessible part which
wouldn't require breaking into the water system to replace or experiment
with different values should your initial estimation require changes. If
your loop system is already metal pipe, just clamp the thermostat offered to
the tube wall. Wrapping the assembly in insulation would further ensure
virtually no differential between the water temperature and the thermostat's
reading.
Bob McC
_____
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Jon
Finley
Sent: Saturday, June 19, 2010 7:47 PM
Subject: RE: AeroElectric-List: OT: Temperature Control Relay
Hi Bob,
Very, very close!
This is to operate a pump that circulates solar heated water thru my hot
tub. What you found is functionally correct, my only additional requirement
is that I can mount the sensor in water (in the solar tubes). Since I am
learning, it might be good for the set points to be adjustable. However; I
am after cheap so that is certainly not a requirement.
Thanks!
Jon
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Robert L.
Nuckolls, III
Sent: Saturday, June 19, 2010 5:19 PM
Subject: Re: AeroElectric-List: OT: Temperature Control Relay
At 05:02 PM 6/19/2010, you wrote:
Hi all,
Very off topic.
I am looking for a small 12 VDC temperature control relay. I want to enable
the relay at ~120 degrees F. and disable it at 100 degrees F. The maximum
relay capacity can be quite small (I can add a larger relay if required).
My searches are overwhelmed with AC versions and very expensive versions.
This seems like something that should be available for about $10.
What you're looking for (I think) is a thermostat
that closes on temperature rise at 120 and does not
open until the temperature falls below 100F.
Here's a part for clothes dryers.
http://tinyurl.com/25ksfkq
It's SKU number is 39076 on this page
http://tinyurl.com/2gy4tma
My local washer repair parts store
shows it as an LD120 for $5 net/$11 list.
It's a single pole, double throw device
so you can use it for open or close on
temperature rise.
Bob . . .
http://www.matronics.com/Navigator?AeroElectric-List
http://forums.matronics.com
http://www.matronics.com/contribution
Checked by AVG - www.avg.com
06:35:00
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