Fredrick Paget on wed 29 aug 01
Pyrometers:
I just ran across an adv. for a dandy one sold by Omega Engineering. It is
the HH306 model and has two type K inputs
(http://www.omega.com/ppt/pptsc.asp?ref=HH305_306). It is priced at $185.
It is not only an indicating instrument but is a data logger that remembers
16000 records so that you can hook it to a computer later on and see a
graph of your firing temperature.
See also the HH506R. It is $145 but does not have the memory. However it
can be used hooked to a laptop for real time data logging and it will
accept type S (platinum) thermocouples as well as type K.
The type S is more accurate at cone 10. Bailey has some type S
thermocouples for kiln use at around $75. You need a connector and
extension wire also - see below.
Orton has some type S too.
Fluke is a very good company and so is Omega. There are also hand helds
made by Tektronix - another good company. I delt with them all at one time
or another in my career.
The thermocouples that they send with these hand held instruments are too
light weight to use in a kiln for very long so figure on buying a couple of
#8 wire size type K thermocouples also. They run around $20 each and you
can get them from any ceramics supplier.
To hook up these large thermocouples you will need some thermocouple
extension wire . A 25 foot minimum order from Omega will run about $25. You
might also want some connectors. There are a couple on the HH306 that you
can probably reuse. Extra ones are also sold by Omega. You must use this
special wire and connectors which are made with thermocouple metal in the
prongs so that you don't introduce extraneous thermo junctions down the
line in your wiring. Each type of thermocouple has its own kind of
connector and extension wire made to match the metals in the thermocouple.
Obviously they don't use platinum in the extension wire for platinum
thermocouples. It is some kind of alloy that matches the platinum around
room temperatures. Platinum wire runs in the neighborhood of 10 to 20
dollars an inch depending on the size.
Bailey has some extension wire and connectors also. No minimum on the wire.
Fred
>We are going to buy a digital pyrometer.
>We are considering the Fluke with 2
>thermocouples we have seen priced at about
>$275-$300. Is this a good one at a good price?
>We considered the inexpensive Axner but Howard
>told me at NCECA that it was not too accurate at
>high temperatures. Any advice on what to get and
>where to get it will be appreciated. Thanks
From Fred Paget, Marin County, California, USA
James Bowen on wed 29 aug 01
The new e-mail address I gave out was incorrect
as many of you have discovered. Sorry for that.
The correct new e-mail address is
jbowen43@plains.net
We are going to buy a digital pyrometer.
We are considering the Fluke with 2
thermocouples we have seen priced at about
$275-$300. Is this a good one at a good price?
We considered the inexpensive Axner but Howard
told me at NCECA that it was not too accurate at
high temperatures. Any advice on what to get and
where to get it will be appreciated. Thanks
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