✅ What Is Gas Detector Calibration?

Gas detector calibration is a technical procedure performed every 6 to 12 months to ensure your device is functioning accurately. Over time, gas detectors and their respective sensors degrade at different speeds. The only way to ensure accurate and repeatable measurements is through gas calibration.

Gas calibration involves exposing your detector to a traceable concentration of test gas. Doing so in a controlled environment with certified gas from the National Institute of Standards and Technology (NIST) adjusts the calibration curve of your gas detector to produce accurate results. 

  • Purchase: single gas calibration, click here
  • Purchase: multi gas calibration, click here

    ✅ How Often Must I Calibrate My Gas Meter? 

    We typically suggest 6 to 12 months. This time period is typical for gas detectors employing electrochemical or catalytic bead sensor elements. Be attentive and calibrate more regularly if:

    • The user is employing the device as an analytical tool where accuracy is paramount.
    • The device is used in an extreme environment (temperature and humidity).
    • The user is performing an imminently dangerous application. Calibration and bump testing is mandatory since imminent injury or death will occur if the device fails.
    • Follow best practices and bump test regularly to ensure reliable operation.

     Who Can Calibrate My Gas Detector? 

    There are two options when it comes to gas detector calibration:

    • OPTION 1: Calibrate the device yourself. To help, we have a video library with step-by-step gas detector calibration tutorials for our products. Scroll down to find your product.
    • OPTION 2: Send it to us and we can calibrate your gas detector. The calibration services we offer include:

     What Equipment Do I Need to Calibrate My Gas Meter?

     To calibrate a gas detector, ensure you have the following:

    • Calibration cap: When required, calibration caps are included with the purchase of a detector.
    • Gas bottle: Recommended calibration gas bottles, click here.
    • Regulator: Recommended gas bottle regulator 0.5 - 1.0 LPM, click here.
    • Tubing: Recommend 1/8" ID silicone tubing, click here.

    ✅ What Is Bump Testing?

    • Bump testing is a procedure where the user exposes the detector to a small amount “blast” of target gas to ensure the detector operates and alarms as programmed.
    • The function of this test is to verify proper operation and build user confidence, particularly in hazardous applications.
    • It is recommended to bump test when first purchased, followed by weekly tests. This is especially important in LIFE THREATENING and / or DANGEROUS applications to verify detector operation. See video explanation here
    • Ozone bump testing is performed with a small ozone generator.
    • We do not offer bump gas for highly reactive gases such as ammonia, phosphine, nitrogen dioxide, and chlorine. In this case, we recommend purchasing 34 L calibration gas bottle to be used as bump gas.
    • Be aware of OSHA requirements regarding bump testing and calibration, see here.
    • Be aware of the International Safety Equipment Association (ISEA) requirements regarding bump testing and calibration, see here.

    ✅ How Do I Calibrate My Gas Detector?

    • Calibration procedures are highlighted in each product manual.
    • Calibration videos are also available on our YouTube channel. See the list below.
    • General gas calibration / bump testing procedures: click here.

     What About Ozone Calibration?

    • Ozone (O3) is unique gas and cannot be calibrated with a calibration gas bottle setup like most gases. As an unstable gas, ozone cannot be stored at a fixed concentration in a gas cylinder. Ozone must be generated on-site. The generated ozone concentration must be calibrated to a NIST traceable source. Only a few laboratories in the USA have the expensive, NIST calibrated equipment necessary to perform ozone gas detector calibration. 
    • Our ozone NIST traceability procedure is highlighted here.
    • The same considerations apply for ozone bump testing. Ozone bump testing must be performed with a small ozone generator.  

     Model FD-90A

    Gases: CO, NO2, CO2, NH3, PH3, NO2, H2, CL2, EX CH4, H2S, SO2, O3, ClO2


     Model FD-90A-O2

    Gases: O2 (Example)

     Model FD-60

    Gases: CO, NO2, CO2, NH3, PH3, NO2, H2, CL2, EX CH4, H2S, SO2, O3, ClO2

     Model FD-60

    Gases: O2

     Model FD-4S

    Gases: CO, H2S, EX, O2

     Model FD-4A

    Gases: CO, H2S, EX, O2

     Model FD-600

    Gases: O2 (Example)

     Model FD-600

    Gases: CO, EX, H2, H2S, CO2, O3

     Model FD-103-CO-LOW

    Gases: CO (low level)


     Model FD-103-O2

    Gases: O2 (Example)


     Model FD-103

    Gases: CO, H2S

     Model CO2000

    Gases: CO2 (USB or AC110V)

     Model FD-90E (Yellow)

    Gases: CH4 (Example)

     Model FD-90E (Red)

    Gases: CH4 (Example)