Bolier Thermometer - would this be ok?

guyb · Dec 23, 2012

Doing a bit of modifications to my boiler, I was wanting to add a temperature sensor without having to put my digital meat fork into the brew each time - so I can see at a glance the temperature (plus last time I dropped it in by accident, and now it's a bit hit and miss if it works).

I found one of these on ebay, and wonder if it would be good for the job? here - I think the probe will be long enough etc - any advice on this gratefully received.

I was going to get a tank connector and 1/2" BSP brass socket which the sensor will screw into etc.

31bb3 · Dec 23, 2012

I'd say it would be fine

keevan · Dec 23, 2012

Here is a cheaper one:

http://www.ebay.co.uk/itm/DIAL-GAUGE-RI ... 19d798a9ec

Comes with a 100mm 1/2" BSP thermopocket too.

guyb · Dec 23, 2012

keevan said:
Here is a cheaper one:

http://www.ebay.co.uk/itm/DIAL-GAUGE-RI ... 19d798a9ec

Comes with a 100mm 1/2" BSP thermopocket too.

:grin: champion, am going to order one of these!

guyb · Jan 1, 2013

For anyone interested, the thermometer turned up, and here's what it looks like:

Nice thermowell with a 1/2" thread and integrated nut:

going to fit this using a standard tank connector

just need to pick up a 1/2" bsp F to F socket:

PD · Jan 1, 2013

nice one.

Dieseljockey · Jan 1, 2013

Thanks for the pics... :thumb: better than the ones on flebay....I'm at the same stage ...modifications to my boiler, at that price I may get two. :lol:

bobsbeer · Jan 1, 2013

What's the diameter of the thermowell inside? Looks like it would fit my PT100? I was looking for a thermowell to fit that.

Sean_Mc · Jan 1, 2013

Would really appreciated a pic heavy walk through when you mod your boiler :thumb:

guyb · Jan 1, 2013

Dieseljockey said:
Thanks for the pics... :thumb: better than the ones on flebay....I'm at the same stage ...modifications to my boiler, at that price I may get two. :lol:

This was off ebay :-)
http://item.mobileweb.ebay.co.uk/viewit ... cmd=VIDESC

Altho they are relisted: http://item.mobileweb.ebay.co.uk/viewit ... 1479521285

guyb · Jan 1, 2013

bobsbeer said:
What's the diameter of the thermowell inside? Looks like it would fit my PT100? I was looking for a thermowell to fit that.

Interesting you should ask. The listed item was a wika gauge, although a different one came, i had a look at Wika, the thermowell outer diameter is about 11 or 12mm, the gauge stem is 9mm according to Wika
Here's the datasheet: http://www.wika.co.uk/upload/DS_TM5003_GB_5764.pdf

Inside diameter of the thermowell I reckon is a shade over 9mm as the stem is snug but not tight, a piece of 10mm copper pipe is too big to fit.

HTH

tazuk · Jan 1, 2013

me too i have been looking for some to fit my pt100 :thumb: :thumb:

my pt100 is 5 mm thick and 100mm long with a 8mm thread

:thumb:

bobsbeer said:
What's the diameter of the thermowell inside? Looks like it would fit my PT100? I was looking for a thermowell to fit that.

bobsbeer · Jan 1, 2013

Thanks I will measure my PT100. What length is it?

guyb · Jan 1, 2013

Sean_Mc said:
Would really appreciated a pic heavy walk through when you mod your boiler :thumb:

No worries, waiting for a q-max cutter to arrive :-)

guyb · Jan 1, 2013

bobsbeer said:
Thanks I will measure my PT100. What length is it?

Here's a pic

The thermowell is a shade longer than the gauge (obv) :grin:

As the well is recessed to take the gauge, I think it is about 90mm deep (from outside measurements)

bobsbeer · Jan 1, 2013

Hmmm.... Just measured the pt100 stem. It's 6mm so there will be an air gap of about 2mm around the stem in the thermowell. I wonder if that will work? Worth a try as I can't seem to find a thermowell that cheap.

guyb · Jan 1, 2013

bobsbeer said:
Hmmm.... Just measured the pt100 stem. It's 6mm so there will be an air gap of about 2mm around the stem in the thermowell. I wonder if that will work? Worth a try as I can't seem to find a thermowell that cheap.

You could always try here: http://www.tcdirect.co.uk/Default.aspx? ... t_id=220/1

bobsbeer · Jan 1, 2013

Thanks for the pic. One ordered so we will see. At worst it can go in my boiler as is and give me an idea how fast it is heating up. :thumb:

bobsbeer · Jan 1, 2013

guyb said:
bobsbeer said:

Hmmm.... Just measured the pt100 stem. It's 6mm so there will be an air gap of about 2mm around the stem in the thermowell. I wonder if that will work? Worth a try as I can't seem to find a thermowell that cheap.

Click to expand...

You could always try here: http://www.tcdirect.co.uk/Default.aspx? ... t_id=220/1

Good find. :thumb: :clap: :clap:

guyb · Jan 1, 2013

bobsbeer said:
guyb said:

bobsbeer said:

Hmmm.... Just measured the pt100 stem. It's 6mm so there will be an air gap of about 2mm around the stem in the thermowell. I wonder if that will work? Worth a try as I can't seem to find a thermowell that cheap.

Click to expand...

You could always try here: http://www.tcdirect.co.uk/Default.aspx? ... t_id=220/1

Click to expand...

Good find. :thumb: :clap: :clap:

:grin:

Bolier Thermometer - would this be ok?

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