The smallest Crystals are unbelievably small - a Model 33 will fit in your shirt pocket. But they're very tough, since the case is made from unbreakable aluminum. They're our most versatile too, capable of measuring pressure from inches (millimeters) of water all the way up to 3000 PSI (200 bar), and vacuum, in a single shirt pocket size package. There are no external transducers! Everything is built in!
There are a variety of models to choose from. Model 31s have one sensor, Model 33s have two. All sensors are built-in, stainless steel, gas and liquid compatible, with an accuracy of 0.05% of reading. All models measure milliamps (that can also be displayed in 0 to 100% for 4 to 20 or 10 to 50 milliamps), have an RS-232 port and come with a carrying case. And, they're intrinsically safe.
Every Model 30 Series instrument is tested and calibrated in an environmental chamber, duplicating field conditions. That's why the specifications (including milliAmps) are not affected by temperature!
Last, but not least, a single alkaline 9V battery provides 90 hours of continuous operation.
Model 30 Series calibrators cost about the same as other competitive calibrators. But you won't find an easier to use, better performing, or better value pressure calibrator in any size!
