Calibrated Helium Leak, KF25 Flange with On/Off Valve, 10-7 std cc/sec, with NIST Certificate
Calibrated helium leaks are typically. used to test and calibrate helium leak detectors. These calibrated leaks have a ISO KF-25 vacuum flange for connection to the helium leak detector. They include a manual on/off valve and come with a NIST Certificate.