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Quartz-Sheath SPRTs

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Drift rates as low as 0.0005 K

Proprietary gas mixture ensures high stability

Most experienced SPRT design team in the business

Choosing the right platinum thermometer as your primary standard may be the most critical purchase decision in your lab. Unfortunately, other manufacturers are pretty secretive about how their SPRTs are made. They won’t tell you much more than you can already see by looking at one. Long-term reputation used to be a reliable indicator, but the leaders of a few decades ago have lost their original craftsmen and design scientists. There are only a few active SPRT design groups in the world today.

So how do you know you’re making the best purchase? Self-proclaimed expertise shouldn’t convince you. You should expect some sound evidence that the company is qualified in the ongoing science of SPRT development. At Hart we’ll tell you how we make an SPRT. We’ll let you talk to the people here who design, build, and calibrate SPRTs. Finally, when you buy one, if you don’t like it, we’ll take it back and return your money.