[Kriztoffer]

I've been speaking some with Neuromancer at MSN.

He linked me this darn cheap Thermometer with Thermocouple sensors..Which I'm looking for and I guess many others..
Is there any chance this thermometer could read temperature range of LN2?

LINK

Specs:
Brand new DM6802B thermometer with a portable 3 1/2 digit, designed to use external K-type thermocouple as temperature sensor.
Description:

• Differential temperature measurement
• Selection between celsius and fahrenheit
• Overload display alert when input exceeds measurement range
• Designed for use with included K-type thermocouples
• Data-hold function
• Temperature read-out in °F or °C selectable
• T1/T2, T1-T2 display

Specifications:

• Temperature range: -50°C to 1300°C ( -58°F to 1999°F)
• Battery: 9V battery (installed)
• Dimensions: 149 x 71 x 41mm
• Weight: 200g ( including battery )
• Included 2 ''K''-thermocouples
• Resolution : 1°C or 1°F

Package Include:

• 1 x DM6802B Unit
• 2 x K type temperature test probe(-50 to 250°C)
• 2 x screw
• 1 x operating manual

[rickss69]

Most of your standard temp probes are not really accurate. The unit itself is probably fine, but the K-types that come with it need to be replaced. PM Splave if he does not chime in here...he might remember the source of those from sdumper.

[Kriztoffer]

Originally Posted by rickss69

Most of your standard temp probes are not really accurate. The unit itself is probably fine, but the K-types that come with it need to be replaced. PM Splave if he does not chime in here...he might remember the source of those from sdumper.

Do you know of any Ktype probes that are good?

I'll redirect him to this thread.

- kriz

[Buckeye]

To get really good probes will cost you a ton, they are not K-Type.

All the probes I have, maybe 8 total, 2 good ones and 6 cheaper ones all read just fine up to about -150c, good ones go to -180c.

It doesnt really matter all that much tbh.

If your chip CB's at -130c but your probe reads -128c it doesnt matter, it CB's the same anyway.

Going to max LN2 temps for me when a probe only reads to -180c just means I pour more in.

As the temps bounce around a lot you are not going to keep anything at exact temp anyway.

[Gutterz]

it only says to -50c. here is a few on ebay
http://cgi.ebay.com/ws/eBayISAPI.dll...=STRK:MEWAX:IT

http://cgi.ebay.com/Digital-K-J-Type...34053989812854

Both say their good for -200c.

[Kriztoffer]

Jup, you are speaking the truth Buckeye. I made this thread to hear opinions from experienced people cause I don't know much about thermometers.

Looks pretty promising Gutterz, I just need a reliable meter that don't cost to much. If I could get meter that is good for -180 and avoiding the price of fluke or UFI I'm happy

[rickss69]

These are cheap and work great. I have one on the cascade...

http://cgi.ebay.com/Universal-Digita...item518e2bc286

[thebanik]

Me too looking for a thermometer and thinking of picking the one you posted in the OP kritz. Let me hope its decent enough till around -150C. IMO we dont need accuracy but just a fair idea about the temps. the chip and mobo can handle stably....

[Kal-EL]

Originally Posted by thebanik

Me too looking for a thermometer and thinking of picking the one you posted in the OP kritz. Let me hope its decent enough till around -150C. IMO we dont need accuracy but just a fair idea about the temps. the chip and mobo can handle stably....

Yah. Except, add also that we want to have consistant readings from bench session to bench session. We don't want to believe that the cbb is @ -42c during session 1 and then session 2 the cold bug is -32c. That wastes ln2/dice and time.

[FACE]

Originally Posted by rickss69

These are cheap and work great. I have one on the cascade...

http://cgi.ebay.com/Universal-Digita...item518e2bc286

Just bought one of these.... Thanks!

Also have been watching flukes on the bay. like this one:

http://cgi.ebay.com/ws/eBayISAPI.dll...=STRK:MEWAX:IT