As a reputed firm, we are engaged in offering Helium Calibrated Leak. The CLP Helium Calibrated Leaks are high-precision Standards for use in critical calibrations of leak detectors and systems, in Ultra-High Vacuum systems, and as Transfer Standards for calibrating other Helium Leaks. They feature all-welded stainless steel construction, a premium all-metal shut-off valve, a glass-permeation leak element, and are bakeable for UHV applications. Specifications: These models cover leak rates from 10-12 up to 10-3 atm-cc/sec and larger, as detailed in other brochures. The CLP Model is available with leak rates of 10-6 to 10-12 and is the only model made for the very low rates of 10-10 to 10-12 atm-cc/sec.The CLP Accu-Flow Calibrated Leaks are based on the principle that helium flows through certain materials at a measurable rate depending on the material thickness, driving pressure and temperature, and use Quartz or Pyrex as the permeation material for the leak element. These leaks are available with or without the leak shut-off valve, but the latter is rare, and with many types of attachment fittings such as QF (NW, KF), Conflat , VCR and others.All CLP Leaks are provided with Certifications of the NIST-traceable calibrations performed in A2LA-accredited Calibration Laboratory. Will not clog: permeation leak elementLong term stability: Low depletion rateWide leak-rate choice: 10-6 to 10-12 rangeBakeable for UHV use: all metal valveNever needs refill: Lasts for yearsSimple to operate: minimal user trainingMeets ISO requirements: NIST-traceable, A2LA-accredited Calibration Certification