Calibration Gas, Instruments & Calibration Services
Instruments & Gas Detectors
Portable, fixed & wireless — plus flow, pressure & temperature. RKI, Senko, OTIS, MSA & more
Calibration Gas
Standard 4-gas & specialty mixes, NIST-traceable with a Certificate of Analysis
Calibration Services from $55
Ship-in (3–5 days) or on-site fleet service — QR-verifiable certificates with every instrument
Help From Real Technicians
No phone tree. Call 865-900-8844 and talk to someone who actually calibrates this gear
Shop by Category
Gas detection, calibration gas, instrumentation & more — from the brands you trust.
Never Miss a Calibration Due Date Again
Every instrument you calibrate with CPS is tracked in our own calibration software — ship it in, drop it off, or have us come to you. You never chase dates or paperwork again. We watch them for you.
30-Day Heads-Up
We email you 30 days before each instrument is due — no spreadsheets, no surprise out-of-cal meters at audit time.
Updates at Every Step
You’re emailed as your instrument moves through the process, and your certificates are sent to you when the work is done.
Scan the Sticker, Get the Cert
The QR sticker on your unit pulls up its certificate — and every past certificate for your whole fleet. The scan is the login.
Audit-Ready Certificates
As-found / as-left readings and every calibration gas Certificate of Analysis listed right on the certificate.
Ways in: Ship-in from $55 · Drop off in Rockwood · On-site for fleets of 10+Calibrate With CPS →
A New Name. 30+ Years of Hands-On Experience.
CPS Calibrations hasn’t been around forever — and we won’t pretend otherwise. What we bring is the people: owners Derek Farmer and Kendall Smith have a combined 30+ years working hands-on with gas detection, calibration gas, and instrumentation. We built CPS in Rockwood, Tennessee to do it better — modern software, honest pricing, and people who answer the phone.
New
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SENSIT SENSIT® HCN CO (Hydrogen Cyanide and Carbon Monoxide)
Sensit Technologies
$1,608.20SENSIT® HCN CO (Hydrogen Cyanide and Carbon Monoxide) — genuine SENSIT Technologies replacement part (#913-FC000-12). -
SENSIT SENSIT® HCN
Sensit Technologies
$1,286.80SENSIT® HCN — genuine SENSIT Technologies replacement part (#913-FC000-11). -
SENSIT SENSIT® COplus (carbon monoxide and oxygen)
Sensit Technologies
$1,167.60SENSIT® COplus (carbon monoxide and oxygen) — genuine SENSIT Technologies replacement part (#913-FC000-10). -
SENSIT SENSIT® CO
Sensit Technologies
$924.60SENSIT® CO — genuine SENSIT Technologies replacement part (#913-FC000-04).
Top Categories
Featured
Bestselling
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Oxygen (O₂) 800 ppm Calibration Gas – Nitrogen Balance
Calibration Gas
MSRP: $60.00 - $210.00$45.00 - $325.00 -
Oxygen (O₂) 0.4% Calibration Gas – Nitrogen Balance
Calibration Gas
MSRP: $60.00 - $210.00$45.00 - $325.00 -
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RKI 10.6 & 10.0 eV PID Replacement Lamp for GX-6000, GX-6100, EAGLE 2 & VOC Pro
RKI Instruments
$284.00
New
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