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Paterson Certified Thermometer 30cm 12"

Brand: Paterson

15 ratings

Price:	$31.00
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Paterson Certified Thermometer 30cm 12"

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All Product Information Customer Q&A's Customer Reviews

Product description

Easy-to-read calibrations, with an extended temperature range of 60-150F° (15-65°C) suitable for all color and black-and-white processes. Calibrations are 0.5°F (0.5°C), accurate to within ±0.25°. Includes a plastic storage tube.

Product information

Product Dimensions

15.5 x 4.1 x 1 inches

Item Weight

7.4 ounces

ASIN

B00017LUQU

Item model number

PTP381

Customer Reviews

15 ratings

4.1 out of 5 stars

Best Sellers Rank

#659 in Darkroom Supplies

Is Discontinued By Manufacturer

Date First Available

June 17, 2003

Manufacturer

Paterson

Warranty & Support

Product Warranty: For warranty information about this product, please click here

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Customer reviews

5 star		68%
4 star 0% (0%)		0%
3 star		18%
2 star 0% (0%)		0%
1 star		15%

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Top reviews from the United States

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VLDBI

It's a thermometer

Reviewed in the United States on April 7, 2015

Verified Purchase

It's a thermometer, it works, and it's accurate. Best for measuring the temperature of liquids, not so good rectally no matter how tempting.

7 people found this helpful

Helpful

Nasser Alhameli

Fast !

Reviewed in the United States on July 11, 2013

Verified Purchase

Fast respond thermometer, very accurate reading! But care must be taken to handle these glass thermometers they are fragile and could brake from just a 3 feet drop!

2 people found this helpful

Helpful

Good negs as a result

Reviewed in the United States on June 16, 2015

Verified Purchase

For film developing I have one for each chemical in the process. Good negs as a result.

Helpful

Peter Stahl

Five Stars

Reviewed in the United States on June 11, 2015

Verified Purchase

Nothing beats it. Worth the investment.

Helpful

Stephanie Cooper

Great!

Reviewed in the United States on February 27, 2020

Verified Purchase

Just what I was looking for

Helpful

Loren Mitchell

Professional Quality

Reviewed in the United States on April 28, 2013

Verified Purchase

Professional quality. Accurate. Responds to temperature changes quickly. Comes with a protective case. Easy to read. Perfect for darkroom use.

One person found this helpful

Helpful

Arnieb

Peterson 12" color thermometer

Reviewed in the United States on February 28, 2014

Verified Purchase

The thermometer came without any instructions on how to use it to achieve its rated accuracy. Also, it didn't have any kind of a calibration document, so I have no way of knowing how accurate it really is. It reads both Fahrenheit and Centigrade, which is a plus, and it seems to be very sensitive, but without really knowing how to properly use it, I can't rate it much higher.

Note that I did search the internet as well, looking for some clues. There was no manufacturer's web site that was nay help.

2 people found this helpful

Helpful

Jose Carlos P. Reyes

This Motorola RazR V3 is of more recent model with features not found in older US bersions.

Reviewed in the United States on May 9, 2015

Verified Purchase

I bought this RazR V3 to replace tthe other Razr V3 I lost. It is pretty much the same except for reverse placement of controls unlike the US version. While it wasn't difficult to learn the keyboard is perfect, not hard to use Bonus is a microSDHC slot for expanded memory. It is probably of more recent production run in Singapore. I also like the charging cable that connects to a USB wall charger. It is long enough to charge with a car charger.

One person found this helpful

Helpful

Top reviews from other countries

Lindosland

A Good Reference for Calibrating Other Thermometers to

Reviewed in the United Kingdom on November 24, 2019

Verified Purchase

I have one of these, bought in a photographic shop about 40 years ago, which I have used to calibrate many digital thermometers over the years. Feeling I have had my money's worth out of it, and seeing the exact same thing available here, I decided that it would be interesting to compare two. The new one reads lower than the old one by about 0.4C to 0.5C (tested at 20, 37 and 50C), which, if we assume one to be high and the other low, is outside the maximum expected difference of 0.28C. While the old one came in packaging that states the accuracy as +-0.14C, the new one does not, casting doubt on the meaning of 'certified' (shouldn't it come with a certificate?) The specification does not say at what temperature the specified accuracy applies - can we assume it applies over the entire range? Resolution is not the same as accuracy of course - the fact that you can read a thermometer to 0.1C says nothing about whether it reads correctly.

Measuring temperature to a tenth of a degree is problematic, and despite the above reservations, these thermometers remain about the best reference easily available. I recently bought two digital medical thermometers on Amazon, only to find that they gave different reading from each other and from my 'old faithful' digital that I have relied on for many years. These, like most digital thermometers, come with no specification of accuracy. The TTC 'Body Basal Thermometer' has high resolution with readings to a hundredth of a degree, but reads -0.6 at 37C compared to my old Paterson, and -0.3 compared to the new Paterson; not really good enough even for basic temperature checks, though for the intended purpose of fertility testing it is fine as only relative readings matter. It settles in about a minute. The 'Best' Digital Medical Thermometer, is much quicker to use, settling in about ten seconds, but reads -0.3 at 37C compared to my old Paterson, or correct according to the new Paterson. My 'Old faithful' digital, reads -0.4 compared to the old, and -0.1 relative to the new Paterson. What to conclude?! I really need a better reference, and also an accuracy specification at 37C. Basal body temperature is important for anyone suspected of sub-clinical hypothyroidism, but it turns out that while my typical body temperature of 36.3 might well be on the low side, I still have no way of truly knowing, and I wonder whether anyone else has!

I compare these thermometers by immersion in a washing-up bowl of warm water, with two thermometers close together, observing as it slowly cools while gently stirring (it cools quite slowly and needs very little stirring to ensure no temperature gradient. I recently discovered that a recognised reference for calibrating is the melting point of Gallium, and there is a good webpage on how to do this. Gallium is readily available online for 10 or 20 pounds, though I have not gone this far in my investigation. I have however contacted Paterson asking for their opinion regarding the discrepancy, and await a reply.

One person found this helpful

Amazon Customer

Started well, but only lasted a year.

Reviewed in the United Kingdom on October 12, 2020

Verified Purchase

Only lasted a year before the blue indicator liquid had separated throughout the capillary. Disappointing for the price I paid.

Yousef

Broken

Reviewed in the United Kingdom on April 25, 2020

Verified Purchase

Received broken inside packaging! Shame

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