calibration cylinders
DEC.TGS_CAL™
DEC.TGS_CAL™ calibration cylinders provide the zero and span gases required to calibrate gas-analysis instruments in DEC ATX™ analytical systems. The range is intended for Flame Ionization Detectors (FID), Non-Dispersive Infrared (NDIR) and Infrared (IR) analyzers, with gas composition matched to the measurement application.
Reliable calibration establishes the analyzer baseline and verifies its response against a known gas composition. This is particularly relevant where analytical measurements support LEL detection and control, VOC emission monitoring and process operation. DEC.TGS_CAL™ forms part of the broader DEC.TGS™ Technical Gases offering.
Calibration gases for FID analyzers
Zero gas
For FID calibration, zero gas is typically pure nitrogen or synthetic air with zero hydrocarbon content. It establishes the zero point of the detector by providing a baseline without hydrocarbon contribution.
Span gas
Span gas contains a known concentration of a hydrocarbon used to calibrate detector response, typically methane (CH4), propane (C3H8), butane (C4H10) or another hydrocarbon as typical FID span-gas components.
Calibration gases for IR and NDIR analyzers
DEC.TGS_CAL-XIR™
DEC.TGS_CAL-XIR™ is dedicated to IR and NDIR calibration. Zero gas is often CO2-free nitrogen or air. Span gas contains a specific concentration of an IR-absorbing compound selected according to the molecule being measured, since different compounds can have different absorption spectra.
DEC.TGS_CAL™ gas composition and coding
Typical coding listed for calibration gas cylinders includes:
- TGS_CAL-O2, for example O2 9% in AIR
- TGS_CAL-N2
- TGS_CAL-CO2
- TGS_CAL-CH4
- TGS_CAL-CH3H8
- TGS_CAL-C4H10
Always specify the background gas, or matrix: when AIR is specified as the matrix, Zero-Grade Purity is imperative.
DEC.TGS_CAL™ pressure-reducing valves
DEC.TGS_CAL-PRV™
The DEC.TGS_CAL-PRV™ pressure reducing valve is designed to limit downstream pressure despite changes in upstream pressure or downstream flow demand: available in both single-stage and double-stage configurations.
- TGS_CAL-PRV-SS • single-stage pressure reducing valve
- TGS_CAL-PRV-DS • double-stage pressure reducing valve
Gas cylinders or gas bottles?
Both terms are used in practice, but DEC identifies gas cylinder as the engineering and regulatory term. “Bottle” is a colloquial or context-specific term. The terminology used by pressure-vessel, regulator and connection standards is based on cylinders and cylinder pressure.
Related DEC analytical and technical-gas solutions
Explore the ATX™ analytical systems, the wider TGS™ Technical Gases portfolio and N2G nitrogen generation. For applications where measurement supports environmental compliance, see DEC.EMS™.
