Calibration Leaks

The easy way to calibrate hydrogen leak detectors
Leak testing is a matter of quantifying leaks. To
be able to correctly accept/reject test objects youneed to measure to a set standard. You also needto calibrate your leak detector against a reliablereference leak. INFICON calibration leaks forhydrogen leak detectors cover a wide range of leakrates to suit your specific application.
For maximum accuracy, our calibration leaks areequipped with a specially developed diffuser nozzle.
This nozzle allows the gas to spread evenly after leaving
the leak without variations caused by air convection.
The distinctive diffuser holder also eliminates the riskof varying or irregular readings depending on the way
the probe approaches the leak. The calibration leaks
are designed to suit INFICON Hydrogen Leak Detector
Sensistor Sentrac, but can easily be used to calibrate
most gas detectors. The INFICON family of calibration
leaks for hydrogen leak detectors include bigger leaks

ADVANTAGES AT A GLANCE■

Suitable for industrial applications■ Refillable and simple to use

Special nozzles included for all INFICON hydrogenleak detector hand probes (not Leak A)■■ Traceable to NIST, NMIJ, NPL, PTB■

Certificate included■ Available in different flows■ Suit different concentrations of hydrogen tracer gas(Types A-C) and smaller leaks (Types E and G). LeakType A is intended for accumulation testing only. Allleaks are traceable to NIST, NMIJ, NPL, PTB, etc.,
through the “Mutual Recognition Arrangement of theBIPM”.
TYPES AND CONNECTIONSA-C• Sintered stainless steel• Inlet: Compression connector for 6 x 4 mm and 1/4” x5/32” tubing. ISO G1/8” internal behind connector• Outlet: ISO G1/8” external• Purge valve: Plug to be opened with 2.5 mm Allen key(hex drive). M5 internal behind plug. Fits also UNF10-32
E AND G• Crimped metal capillary• Filling connection: 1/4” male NPT, adapter for maleISO 1/4” included

REFERENCE LEAKSCONTENT AT DELIVERY
Type ATYPE A

Calibration leak assembly comprising leak and purge valve assembly
Red G1/8” gasket■ Collet nut for connection to 1/4” tubing (marked red)
■ Calibration certificate■ Delivery and storage case■ Manual■■Type B and C
Calibration leak assembly comprising leak and purge valve assembly
Diffusor holder (for hand probe calibration)■ Diffusor filter (2 pcs)
■ Probe guide rings, 8-11 mm diameter (4 pcs)
■ Red G1/8” gasket■ Collet nut for connection to 1/4” tubing (marked red)■ 2.5 mm Allen key (hex drive) for purge valve and assembly of diffusor■ Calibration certificate■ Delivery and storage case■ ManualTYPE B AND C■
■8 mm

9 mm

10 mm
11 mm

Type E and G
Reference leak assemblyThread adapter (1/4” NPT- 1/4” ISO)
■ Diffusor holder (for hand probe calibration)■ Diffusor filter (2pcs)■ Probe guide rings, 8-11 mm diameter (4 pcs)
■ 2.5 mm Allen key (hex drive) for assembly of diffusor■ Calibration certificate■

TYPE E AND G

■

8 mm

10 mm

9 mm
11 mm

SPECIFICATIONS AND ORDERING INFORMATIONS
Target flow for standard leaks:
TypePart no.

Nominal flow**

AccuracyA*

590-420-25x10 (Air)B

590-421

CEquivalent toFor equivalent flow in:mbar.l/s or atm cc/s (air)mbar.l/s or atm cc/s (5%H2/95%N2)±2 %multiply with 1

multiply with 1.04

5x10-3 (Air)±2 %multiply with 1

multiply with 1.04

590-4225x10-4 (Air)±2 %multiply with 1

multiply with 1.04

E590-427

7x10-5 (5%H2/95%N2)

±10 %

10

multiply with 0.96

multiply with 1

G590-429

2x10-5 (5%H2/95%N2)

±10 %

3

multiply with 0.96

multiply with 1

atm ml/s

g/yr (R134a)

A-C leaks are certified at 1 bar pressure, E and G leaks shall be pressurized according to certificate.
*Type A leaks are delivered without diffuser nozzle and are recommended for accumulation testing only.
They can not be used for calibrating hand probes with 5% H2 / 95% N2.
**A-C leaks are delivered with leak size within ±10% of nominal flow, E and G leaks with leak size within ±25% of nominal flow.

w w w. i n fi c on. c om

r e a c hus @inficon.com

Due to our continuing program of product improvements, specifications are subject to change without notice.
nibq69e1-2 (2103)    ©2020 INFICON