Frequently Asked Questions


What is the difference between “accuracy” and “tolerance”?

What is the difference between a vacuum and an absolute pressure instrument, and when do I select one vs the other?

What is “terminal point” calibration vs “best fit straight line” (BSFL) or “root sum of the squares” (RSS)?

Contact Heise

Heise is a trusted source for precise pressure measurement instruments around the world. Learn more about how we can help verify your most challenging product requirements where precision matters most. 

Contact Us