In-House Calibrations
In-House Gas Detector Calibration
The easiest errand on your safety checklist.
Box up your detectors and send them to our lab in Rockwood, Tennessee — or just swing by and drop them off. They’ll come home calibrated, certified, and ready for whatever your crew walks into next.
Three Easy Ways to Get Calibrated
Pick whatever fits your day — the calibration is the same thorough job either way.
Ship Them In
From anywhere in the U.S. Pack your detectors, write your RMA number on the box, and send them to Rockwood, TN.
Start an RMA →Drop Them Off
In the neighborhood? Bring them to 109 S. Front Street, Rockwood, TN during business hours. We’ll check you in fast.
Get directions →We’ll Come to You
10+ instruments? Our technician calibrates your whole fleet at your facility. No packing, no shipping, no downtime.
See on-site services →How It Works
Four steps. About two minutes of your time.
Get your RMA number
A two-minute online form with your instrument details. Your RMA number arrives by email with instructions.
Send or bring your detectors
Ship to Rockwood, TN or drop off in person. RMA number on the box, packing slip inside.
We calibrate every channel
Every sensor bump-tested, calibrated, and verified. Alarms checked. Sensors and batteries health-checked.
Back to work
Certificates land in your inbox, fresh due-date stickers go on the units, and everything ships back.
What your certificate proves
Hand it to your safety manager, your auditor, or OSHA. Every certificate documents:
- As-found & as-left readings, every channel
- NIST-traceable gas lot numbers
- Certificate of Analysis (CoA) links
- Measurement uncertainty
- Pass/fail vs. manufacturer specs
- Next recommended due date
What’s Included With Your Calibration
One tier. No upsells. Every in-house calibration includes:
- Instrument inspectionA full once-over before we start
- Sensor response evaluationEvery sensor checked for response
- Fresh-air / zero adjustment
- Calibration using traceable calibration gasNIST-traceable, lot numbers recorded
- Alarm / function testingLow and high alarms verified
- Pump and flow check
- Filter inspection
- Calibration adjustment
- As-found and as-left recorded
- Calibration certificateDetailed, emailed as PDF
- Calibration stickerNext due date, applied to the unit
- Calibration reminderWe nudge you before the next due date
Our lab quality system is being built around ISO/IEC 17025:2017 — we’re working toward full accreditation.
Run by Software, Not Clipboards
Most calibration shops run on paper forms and memory. We built our own calibration management software — and every instrument you send us goes through it:
- QR code on every certificateScan it with your phone to pull up the live certificate anytime. Auditors love this.
- Full data on every certAs-found/as-left readings, measurement uncertainty, CoA links for the gas used
- Complete instrument historyEvery calibration your unit ever had with us, on record and retrievable
- Automatic due-date remindersWe email you before your instruments go out of cal — free
- Paperless and preciseEvery reading captured digitally. No transcription errors, no lost paperwork.
Calibration & Repair Pricing
Reliable service. Transparent pricing. Keep your equipment running safely.
| Service | Price | Details |
|---|---|---|
| Single Gas Meters | $55.00 | Calibration with standard sensors. |
| 4 & 5 Gas Meters | $90.00 | Calibration with standard sensors. |
| Sensor Replacement | +$20.00 | Additional charge plus the cost of the sensor. |
| Other Repairs | $75.00/hr | Billed in half-hour increments plus the cost of parts. |
| Declined Repairs / Unrepairable Units | $45.00 | Shipping and evaluation fee. Waived if you choose not to have the unit returned. |
Pricing is for in-house calibrations only.
Portable multi-gas and single-gas detectors from all the major brands. Don’t see yours? Ask us — if it can be calibrated, we can probably do it.
Manufacturer names and logos are trademarks of their respective owners. CPS Calibrations is an independent calibration and service provider — display does not imply affiliation, authorization, endorsement, or certification unless specifically stated.
Who Sends Us Their Detectors
If your crew breathes where the air might not be safe, you’re our people.
Turnaround & Shipping
Turnaround
3–5 business days of bench time in our lab — shipping time each way isn’t counted. Need a repair? We quote it first (repairs add time).
Repairs & extras
Bad sensor, weak pump, cracked case — we call with your options before doing anything extra. No surprise charges. Ever.
Free due-date reminders
We track your instruments and email you before they go out of cal. One less thing to remember.
In a hurry?
Down to your last spare? Call 865-900-8844 before shipping and ask about rush turnaround.
RMA number on the outside of the box · packing slip with instruments & serial numbers inside · we return-ship UPS, insured
Frequently Asked Questions
How is in-house calibration different from on-site?
In-house means you ship (or drop off) instruments at our Rockwood, TN lab. On-site means our technician comes to your facility — usually the better deal at 10+ instruments. See on-site services.
Can I drop off my instruments in person?
Yep — 109 S. Front Street, Rockwood, TN during business hours. Get your RMA online first and we’ll check you in fast.
What paperwork do I get?
A detailed certificate per instrument: as-found/as-left readings, the NIST-traceable gas used (lot numbers + CoA links), measurement uncertainty, and pass/fail. Emailed as PDFs, kept on file for your audits.
Do you calibrate instruments you didn’t sell?
Absolutely — any supported instrument, no matter where you bought it.
What if my instrument fails calibration?
We figure out why, then call you with repair or replacement options before doing anything. You’ll never pay for work you didn’t approve.
Do you remind me when calibrations are due?
Yes — we track your due dates and email you before your instruments go out of cal. Free, automatic, one less thing on your plate.
How often should gas detectors be calibrated?
Most manufacturers and OSHA say at least every 6 months, with a bump test before each use. Your certificate shows the next due date.
Ready when your detectors are.
Start an RMA in about two minutes — or just call us at 865-900-8844.
CPS Calibrations · 109 S. Front Street, Rockwood, TN 37854