Schreiner Certified Leak Standards


Schreiner Certified Leak Standards

 Schreiner Certified Leak Standards


Schreiner Certified Leak Standards | Descriptions

CTS-Schreiner provides leak standards for a diverse range of leak and flow testing applications. The leak standards are manufactured to precision tolerances based upon the specific flow and pressure requirements. Our leak standards are manufactured in a lab that is A2LA accredited and ISO 17025:2005 certified insuring that the strictest controlled calibration procedures are followed during the course of the manufacturing process. The leak standards are provided with calibration certificates traceable to NIST.

Leak Rate Conversion (SCC/M to NCC/M)

CTS leak standards are accredited to ISO 17025:2005 and manufactured to a NIST-traceable calibration. The standard calibration flow unit for CTS is scc/m (standard cubic centimeters per minute). The European standard flow unit is ncc/m, normal flow conditions. The chart below compares scc/m to ncc/m unit showing their temperature differences at baseline pressure.

Leak Standard Configurations

A leak standard is a fabricated part. The Holder is the main body. Each leak standard is made to order, precisely sized to flow at an exact pressure in an ISO certified CTS calibration lab. All leak standards ship with a certificate of calibration that identifies the certified flow at a specific pressure for the manufactured unit. Our Part number identifies the holder style to be used for the leak standard. The Description field details the flow and required pressure specification for the leak standard. In the example, the part number is for an A-style holder, the unit is certified to flow at 12 scc/min at 1.5 bar (21.76 psi) using Nitrogen gas.


  • ISO 17025:2005 A2LA accredited
  • NIST-traceable calibration certification
  • Integrate into test instruments
  • Mount into master calibration parts
  • lug into test line
  • Controlled flow applications
  • Manufactured to a specified leak/flow rate at a specified pressure


  • Automotive
  • Consumer Goods
  • Powertrain
  • Energy
  • HVAC/R
  • Medical
  • Military
  • Transportation

Flow Range

  • Leak or Flow range: 1x10-5 atm-cc/sec to 50,000 scc/min
    - Manufactured to ISO 17025

Pressure range

  • Standard holders: -1,0 to 34,5 bar (-14.7 to 500 psig)
  • Welded holders: >34,5 to 206,8 bar (>500 to 3000 psig)

Accuracy and Tolerances

Flow Range: 0.49 scc/m or lessFlow Accuracy ±6.5 %
Manufacturing Tolerance ±20 %
Flow Range: 0.50 to 7.0 scc/mFlow Accuracy ±0.1 scc/m
Manufacturing Tolerance ±0.1 scc/m
Flow Range: 7.0 scc/m or greaterFlow Accuracy ±1.4 %
Manufacturing Tolerance ±1.0 %

Integral assembly
The manufactured flow standard is sealed into one of various assemblies:

  • General application (1/8" NPT end fittings)
  • Legacy units for CTS, Schreiner, and Sciemetric instruments
  • New units for CTS-Schreiner LPC 528 and LPC 850, CTS Sentinel I28, C28, C20WE, Blackbelt, Blackbelt Pro, and Sciemetric 3520 instruments
  • Compatible replacement units for competitor instruments
  • Custom mounting configurations

All leak standard assemblies include an inlet filter, some models are equipped with an exhaust filter.


For re-certification, the current flow rate is measured and compared to previous calibration and/or the original leak rate and pressure specification. If the current flow value is outside the allowable toleranace range it is replaced with a new orifice. All CTS-Schreiner recalibrated leak standards come with a NIST traceable certificate and specifications.

Reference :

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Download Datasheet : Schreiner Certified Leak Standards