Digital thermometer for water bath?

The margin for color is 0.25 F, or 0.10 C -- for processing E6 --

at any rate, check out: http://www.omega.com/
quite a number of their instruments show up on EBay -- in the Business
Equipment Section under Lab Equipment OR Test Equipment


"Nick Zentena" wrote in message
...
jjs wrote:
"Nick Zentena" wrote in message
...

Anybody care to suggest something? Reasonably accurate. Reading in
1/10s of a degree [C and F]. Able to handle living in a water bath long
term. Costing less then the national debt.

Isn't .1 of a degree C or F a bit excessive? In any event, why not a
very
good analog thermometer? That's what they are made for.


No the margin for colour is tighter. I'm using the thermometer to track
the water bath at a glance. I use an accurate but slow digital fever
thermometer to check the temps but the big thermometer was great for
watching the water bath heat up. For wondering if anything had screwed
up-)
It let me avoid lifting the lid and letting all the heat out. If I could
get
a long stem analog then I guess I could drill a hole in the lid.

Nick

"Nick Zentena" wrote

Anybody care to suggest something? Reasonably accurate. Reading in
1/10s of a degree [C and F]. Able to handle living in a water bath long
term. Costing less then the national debt.

I use a Taylor #9842 "Professional Waterproof Digital Thermometer"
(yea, right, well it _is_ digital). 0.1C, stainless probe like a
dial Weston, calibrate screw, runs on 1 LR44.

I wouldn't use it under water, but it seems to be rinsable.
Have had two for about a year, no problems. And, you can
use it to check the Sunday roast (do not leave in oven, though).

$15.99 or so.

--
Nicholas O. Lindan, Cleveland, Ohio
Consulting Engineer: Electronics; Informatics; Photonics.
Remove spaces etc. to reply: n o lindan at net com dot com
psst.. want to buy an f-stop timer? nolindan.com/da/fstop/

"Nick Zentena" wrote

Anybody care to suggest something? Reasonably accurate. Reading in
1/10s of a degree [C and F]. Able to handle living in a water bath long
term. Costing less then the national debt.

I use a Taylor #9842 "Professional Waterproof Digital Thermometer"
(yea, right, well it _is_ digital). 0.1C, stainless probe like a
dial Weston, calibrate screw, runs on 1 LR44.

I wouldn't use it under water, but it seems to be rinsable.
Have had two for about a year, no problems. And, you can
use it to check the Sunday roast (do not leave in oven, though).

$15.99 or so.

--
Nicholas O. Lindan, Cleveland, Ohio
Consulting Engineer: Electronics; Informatics; Photonics.
Remove spaces etc. to reply: n o lindan at net com dot com
psst.. want to buy an f-stop timer? nolindan.com/da/fstop/

"Nick Zentena" wrote in message
...
jjs wrote:

Isn't .1 of a degree C or F a bit excessive? In any event, why not a very
good analog thermometer? That's what they are made for.


No the margin for colour is tighter. I'm using the thermometer to track
the water bath at a glance.

I have to disagree. First, Kodak and Jobo, among others, supply a 'color'
temp thermometer accurate to .2, so one would think that adequate and
second, they also _guarantee_ that accuracy while cheap digital thermometers
not so intended are not guaranteed. With the later you could be off a full
degree or more and not know it unless you check against the good analog.

Nick Zentena wrote:
jjs wrote:

"Nick Zentena" wrote in message
...

Anybody care to suggest something? Reasonably accurate. Reading in
1/10s of a degree [C and F]. Able to handle living in a water bath long
term. Costing less then the national debt.

Isn't .1 of a degree C or F a bit excessive? In any event, why not a very
good analog thermometer? That's what they are made for.



No the margin for colour is tighter. I'm using the thermometer to track
the water bath at a glance. I use an accurate but slow digital fever
thermometer to check the temps but the big thermometer was great for
watching the water bath heat up. For wondering if anything had screwed up-)
It let me avoid lifting the lid and letting all the heat out. If I could get
a long stem analog then I guess I could drill a hole in the lid.

Nick

Fever thermometers indicate max temperature. That means if the temp drops it
will not show the drop. They work well for temps going up.

Radio Shack sells an inexpensive unit for less than $30. Mine matches the
Kodak mercury thermometer at several points but, of course, the Kodak cannot
be read to 0.1, just approximated at the degree points.

Bert

Nick Zentena wrote:
jjs wrote:

"Nick Zentena" wrote in message
...

Anybody care to suggest something? Reasonably accurate. Reading in
1/10s of a degree [C and F]. Able to handle living in a water bath long
term. Costing less then the national debt.

Isn't .1 of a degree C or F a bit excessive? In any event, why not a very
good analog thermometer? That's what they are made for.



No the margin for colour is tighter. I'm using the thermometer to track
the water bath at a glance. I use an accurate but slow digital fever
thermometer to check the temps but the big thermometer was great for
watching the water bath heat up. For wondering if anything had screwed up-)
It let me avoid lifting the lid and letting all the heat out. If I could get
a long stem analog then I guess I could drill a hole in the lid.

Nick

Fever thermometers indicate max temperature. That means if the temp drops it
will not show the drop. They work well for temps going up.

Radio Shack sells an inexpensive unit for less than $30. Mine matches the
Kodak mercury thermometer at several points but, of course, the Kodak cannot
be read to 0.1, just approximated at the degree points.

Bert

jjs wrote:


I have to disagree. First, Kodak and Jobo, among others, supply a 'color'
temp thermometer accurate to .2, so one would think that adequate and
second, they also _guarantee_ that accuracy while cheap digital thermometers
not so intended are not guaranteed. With the later you could be off a full
degree or more and not know it unless you check against the good analog.


No what I want is something that reads 0.1 degrees. What I do is then
check that against my fever thermometer that's supposedly accurate to +/-
0.1 degrees. The one I need to replace used to be off +4 degrees in the
range that I needed. Now it was a constant 4 degrees so I just mentally
subtracted 4. Yesterday it was reading around 5 degrees high then when I
took it out of the bath it started reading more then 30 degrees high. Not a
good sign. I've found the packaging and I'll see if Radio Shack has a
warranty program or something.

I've found this one that looks pretty close to perfect.

http://www.control3.com/4373p.htm

Stick the probe in the bath and the display unit some place
visible.



Nick

jjs wrote:


I have to disagree. First, Kodak and Jobo, among others, supply a 'color'
temp thermometer accurate to .2, so one would think that adequate and
second, they also _guarantee_ that accuracy while cheap digital thermometers
not so intended are not guaranteed. With the later you could be off a full
degree or more and not know it unless you check against the good analog.


No what I want is something that reads 0.1 degrees. What I do is then
check that against my fever thermometer that's supposedly accurate to +/-
0.1 degrees. The one I need to replace used to be off +4 degrees in the
range that I needed. Now it was a constant 4 degrees so I just mentally
subtracted 4. Yesterday it was reading around 5 degrees high then when I
took it out of the bath it started reading more then 30 degrees high. Not a
good sign. I've found the packaging and I'll see if Radio Shack has a
warranty program or something.

I've found this one that looks pretty close to perfect.

http://www.control3.com/4373p.htm

Stick the probe in the bath and the display unit some place
visible.



Nick

Jim Phelps wrote:


for a module with built in switching, check out part number 195715 55. This
has 1 degree accuracy and 0.1 resolution. You can also set up switching

I think I found the Chinese maker of this. Minimumn order was 1000 pieces-)


I also found this one.

http://www.control3.com/4373p.htm


It seems to have all the functions I need. Problem might be buying it.
The one place I found that sells to the public wants $30 for shipping to
Canada and then UPS will tack a $20 handling fee on top of that. The local
sellers all seem to be lab equipment suppliers. I'm not sure if they sell to
the general public.

Nick

Jim Phelps wrote:


for a module with built in switching, check out part number 195715 55. This
has 1 degree accuracy and 0.1 resolution. You can also set up switching

I think I found the Chinese maker of this. Minimumn order was 1000 pieces-)


I also found this one.

http://www.control3.com/4373p.htm


It seems to have all the functions I need. Problem might be buying it.
The one place I found that sells to the public wants $30 for shipping to
Canada and then UPS will tack a $20 handling fee on top of that. The local
sellers all seem to be lab equipment suppliers. I'm not sure if they sell to
the general public.

Nick