Scroll down for PDF Specification. As with the original high accuracy BetaGauge PI gauges, the BetaGauge PIR takes the concept of a simple analog Test Gauge and combines it with the accuracy of digital technology. The new Reference Class gauges provide exceptional performance with ±0.04% of reading accuracy, especially when operated below 50% of their range.. The Reference Class BetaGauge PIR digital test gauges are available six ranges — 30 psi Compound, 30 psig, 100 psig, 500 psig, 1,000 psig, and 3,000 psig. Setup of the BetaGauge PIR is fast and straightforward, through a menu-driven display, with minimal text and intuitive functions, that is simple enough to allow the gauge to be used anywhere in the world without the need for multilingual displays. Pressure readings are displayed in any one of 18 standard engineering units, or in user-defi ned custom units, eliminating tedious conversion calculations. Readings are displayed on a 5-1/2 digit, 0.65” high digital display and companion percent-of-range bar Click HERE for Specifications, Diagrams in PDF