The value of a laboratory grade instrument and probe is the ability to assume accuracy of the measurement(within the tolerance of the device). One can, with some assurance, use any sort of probe as long as you have some sort of calibration that will give satisfactory accuracy for the application. Temperature is, thankfully, one of the measurements that can be ascertained with reasonable accuracy without great difficulty. One should be careful when making temperature measurements over broad temperature ranges as this factor can have dramatic influence over measurement accuracy. Jim hatchett, eagle Idaho, usa
-----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Fern Hill Sent: Monday, April 18, 2011 8:33 PM To: Alpine-L, the Electronic Rock Garden Society; postings copyright by authors. Subject: Re: [Alpine-l] Springtime photos Just got back from a trip and reviewing emails. Last year I lost my good "T" shaped temperature probe in a woods near Atlanta. Despite an hour and a half of searching I could not locate the double-stemmed trillium next to a rotting log where the probe was inserted. Since a replacement was charged at $150.00 by the scientific supply house where I had bought it some years earlier, I declined their offering in favor of a good kitchen oven thermometer probe that I got for about $15.00. It works just fine and I could afford it. John Gyer Clarksboro NJ USA ----- Original Message ----- From: "J.E. Shields" <[email protected]> To: "Alpine-L, the Electronic Rock Garden Society;postings copyright by authors." <[email protected]> Sent: Saturday, April 16, 2011 12:02 PM Subject: Re: [Alpine-l] Springtime photos > Cohen, > > You need a probe thermometer. Look in scientific supply house > catalogs. There are several, like Daigger and Fisher Scientific, for > instance. > > Jim Shields > > At 10:56 PM 4/15/2011 -0600, you wrote: >>....... >>I actually have no idea how cold it is/gets under our snow pack, which is >>much less and of shorter duration than yours, though considerably more and >>longer lasting than in places like Calgary (where, it should be noted, >>many things rated for much warmer zones survive in years with little snow >>cover at all.. of course often little is actually known about the >>hardiness of various species outside regions with the most gardeners), and >>varies considerably from one part of my property to another, within a few >>metres one way or another in some cases! Certainly nothing is growing >>under the snow here, with the soil solidly frozen before snow cover, >>generally, and for some time at least after melt as well! >>More forecast for tomorrow--looks like a late spring here this year! >>Cohan >>.......................... > > ************************************************* > Jim Shields USDA Zone 5 > P.O. Box 92 WWW: http://www.shieldsgardens.com/ > Westfield, Indiana 46074, USA > Tel. ++1-317-867-3344 > > _______________________________________________ > Alpine-l mailing list > [email protected] > http://mailman.science.uu.nl/mailman/listinfo/alpine-l > > _______________________________________________ Alpine-l mailing list [email protected] http://mailman.science.uu.nl/mailman/listinfo/alpine-l _______________________________________________ Alpine-l mailing list [email protected] http://mailman.science.uu.nl/mailman/listinfo/alpine-l
