
Nitric Oxide (NO) / NOx Calibration Gas Mixture
- NIST traceable NO/NOx at PPM & PPB levels
- EPA Method 7E & Part 75 CEMS calibration ready
- Enhanced stability via proprietary cylinder treatment
NIST Traceable Gas Standards
ISO 17025 Accreditation
SpecGas Inc. offers a comprehensive range of calibration gas supplies including reactive, toxic, hydrocarbon, atmospheric, VOC, and rare gas mixtures. All blends are NIST traceable, produced with proprietary in-house techniques, and engineered for gas detector calibration, emissions monitoring, laboratory analysis, and industrial process applications across diverse industries.






























Talk to our product experts for custom solutions.
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SpecGas supplies a broad range of calibration gases including reactive and toxic gases (H₂S, CO, NH₃, HCN, HCl, SO₂, NO/NOx, Cl₂, ClO₂, PH₃), hydrocarbons (CH₄, C₂H₆, C₃H₈, C₄H₈), VOCs (formaldehyde, isobutylene, acetone, DMS), atmospheric gases (O₂, CO₂, N₂), moisture mixtures, and rare/noble gases (He, Ne, Ar, Xe, KrCl). Custom multi-component blends are also available.
Talk to our experts for custom solutions and tailored guidance.

Calibration gases for EPA Method CEMS, stack emissions testing, ambient air quality networks, and GHG reporting.

H₂S, CH₄, CO, hydrocarbon LEL, and LDAR calibration gases for upstream wellsites, refineries, and pipelines.

Ultra-high-purity rare gases, toxic gas TGMS calibration, and process gas standards for semiconductor fabs and cleanrooms.

NIST traceable GC carrier gases, multi-component custom blends, and specialty calibration standards for academic and private labs.
Talk to our experts for custom solutions and tailored guidance.
All calibration gas mixtures are blended in-house, enabling SpecGas to ship faster than any competitor — with rush service available on request.
Patented internal cylinder treatment and gravimetric blending produce reactive gas mixtures with superior shelf life and the SpecGas Stability Guarantee on every order.
Founded by a career research chemist with 45+ years of specialty gas experience, SpecGas produces rare and difficult-to-blend gases that major suppliers cannot reliably provide.
Submit your mixture requirements and a SpecGas specialist will respond with pricing, lead times, and technical guidance tailored to your application.
For immediate assistance, feel free to give us a direct call at (215) 443-2600. You can also send us a quick email at website-inquiries@specgasinc.com.
For immediate assistance, feel free to give us a direct call at (215) 443-2600. You can also send us a quick email at website-inquiries@specgasinc.com.