Helium Calibrators

Ordering Information

The FSLC Calibrators can be ordered for a single specified leak rate within a wide range of values. When ordering or requesting a quotation, please provide the Part Number and also specify the Leak Rate requested using the full description of both the rate and the leak-rate units that you are requesting (for example: 2.0x10-4 atm-cc/sec). Also, please specify the manufacturing variance ("tolerance") that you can allow on that Leak Rate as +/- 40%. or +/- 15%. The usual manufacturing variance is +/- 40% of the requested rate. (For the example rate above, the allowable range as manufactured would be from 1.2 to 2.8x10-4.) A "Special Range" variance is available of +/- 15%. (For the example, this would allow the leak rate, as delivered, to be from 1.7 to 2.3x10-4.) For this special manufacturing variance, an "-SR" is added to the end of the Part Number and there is an addition of $200 to the price of the Leak.

Please contact us for assistance if you have any technical or ordering questions or want a customized Leak or manufacturing variance. Other leak-rates units, such as Torr-liters/sec, can be specified and calibration data will be reported in the units requested. Calibrated Leak Standards of many gasses other than Helium (such as SF6, Ne, H2, CO2) can also be provided in the FSLC model. Please ask us about availability.

Order Codes

X Code:For leak Rates from:
31.0 to 9.9x10-3 atm-cc/sec
41.0 to 9.9x10-4 atm-cc/sec
51.0 to 9.9x10-5 atm-cc/sec
61.0 to 9.9x10-6 atm-cc/sec
Y Code:For Reservoir size:
150DOT150cc
300DOT300cc
500DOT500cc
1000DOT1000cc

Part Number Build-Up

The FSLC Series Part Numbers are constructed as follows:

         FSLC-X-HE-1/4T-YYYYY-WFV

where X = the code for the Leak Rate Range required,

and YYYYY = the code for the size of reservoir required. The X and Y codes are listed in the table right.

As noted above, a -SR is added to the end of the part number to identify the special manufacturing variance of +/- 15% in the Leak Rate instead of the standard +/- 40% variance.

The FSLC model is identified as a Fixed-rate Calibrated Leak with a crimped stainless steel capillary leak element and is specifically designed for calibrating sniffer type leak detectors. The "He" in the part number identifies this as a Helium Calibrated Leak and the "WFV" designates the particular Teflon-packed stainless steel fill valve used on the product. For FSLC models with other gases please contact VTI for part number information.

Leak Rate Ranges Available and Example Part Numbers

Examples of common part numbers: For a specified Value in this Range: Reservoir Size:
FSLC-3-HE-1/4T-1000DOT-WFV-1500PSI 
FSLC-4-HE-1/4T-1000DOT-WFV 
FSLC-4-HE-1/4T-500DOT-WFV 
FSLC-5-HE-1/4T-500DOT-WFV 
FSLC-5-HE-1/4T-300DOT-WFV 
FSLC-5-HE-1/4T-150DOT-WFV 
FSLC-6-HE-1/4T-150DOT-WFV 
FSLC-6-HE-1/4T-300DOT-WFV 
1.0 to 9.9x10-3 atm-cc/sec
1.0 to 9.9x10-4 atm-cc/sec
1.0 to 3.0x10-4 atm-cc/sec
1.0 to 9.9x10-5 atm-cc/sec
1.0 to 9.9x10-5 atm-cc/sec
1.0 to 3.0x10-5 atm-cc/sec
1.0 to 9.9x10-6 atm-cc/sec
1.0 to 9.9x10-6 atm-cc/sec
1000cc 
1000cc 
500cc 
500cc 
300cc 
150cc 
150cc 
300cc