Each factory pre-calibrated sensor comes with a pre-paid, pre-addressed return label. Once the old sensor is removed and the fresh sensor is installed, simply place the old sensor in the original packaging and use the pre-paid label to mail back to ChemDAQ. If you need new packing materials or a new return label, please contact Technical Services. 

Annual SXP participation is quoted to each customer based on their ChemDAQ equipment inventory. Quotes can vary from year-to-year.

No. During your second and third sensor exchange cycles, you will begin to receive information on how to renew your SXP coverage for the next year. For questions or to renew in advance, contact your account manager.

If you don’t renew your annual SXP participation, your account will be placed on hold which will suspend pre-calibrated sensor shipments. Without freshly calibrated sensors, your monitors will stop measuring gas levels around 6 months out from the last sensor exchange, putting workers at risk. We will happily restore your account upon receipt of payment or purchase order including a 10% restoral fee.

Each factory pre-calibrated sensor comes with a pre-paid, pre-addressed return label. Once the old sensor is removed and the fresh sensor is installed, simply place the old sensor in the original packaging and use the pre-paid label to mail back to ChemDAQ. If you need new packing materials or a new return label, please contact Technical Services. 

1. Disconnect the old Sensor by doing the following:

    a. Remove the old Sensor from the Sensor Cradle by lifting the Sensor straight up.

    b. POWER OFF the Sensor by pressing and holding the POWER BUTTON until the LED turns off.

        (The NO SENSOR message will be displayed on the Area Monitor until the new Sensor is installed.)

    c. Unplug the USB cable from the Sensor by turning the connector’s locking ring counterclockwise. Then pull out the connector 

2. Install the new Sensor by doing the following:

    a. Connect the USB cable by inserting into the USB port of the new Sensor. Secure by gently rotating the locking ring clockwise.

    b. POWER ON the new Sensor (if necessary) by pressing and holding the POWER BUTTON for approximately five seconds, until the LED            illuminates.

    c. Set the Sensor in the Sensor Cradle. The button on the back of the Sensor slides between the tabs on the Cradle.

    d. WAIT AT LEAST TWO MINUTES BEFORE ZEROING.

3. If Required, ZERO the new Sensor
4. Package the old Sensors and return them to ChemDAQ. Packing material, and a return-shipping label is provided for your convenience.

1. Disconnect the old Sensor by doing the following:

    a. Remove the old Sensor from the Sensor Cradle by lifting the Sensor straight up.

    b. POWER OFF the Sensor by pressing and holding the POWER BUTTON until the LEDturns off. 

           (The NO SENSOR message will be displayed on the Area Monitor until the new Sensoris installed.)

    c. Unplug the Power Adapter from the Sensor by gently twisting the locking ring counterclockwise and pulling the connector straight out.

2. Install the new Sensor by doing the following:

    a. Connect the Power Adapter (C): Insert connector and gently turn the locking ring clockwise.

    b. POWER ON the new Sensor by pressing and holding the POWER BUTTON for approximately five seconds, until the LED illuminates.

    c. At the Area Monitor, access the Bluetooth Interface. (MENU > [Passcode]>Bluetooth)

    d. In the Bluetooth screen, press SENSOR CONNECTION. 

         The Area Monitor will now scan for Bluetooth devices within range and will list their serial numbers and/or device names on the                    display. Your new Sensor will be listed by its serial number. If the serial number does not appear, press RESCAN.

    e. Once you have found the new Sensor’s serial number on the list, use the virtual keypad to select it. (If the Sensor is #3 on the list,               press 3 on the keypad.) Follow the prompts.

    f. When communications are established, press BACK to return to the Home Display. 

            The Area Monitor might display a “No Sensor” message temporarily. This will clear within a few seconds after system updating is                   complete.

    g. Set the Sensor in the Sensor Cradle. The button on the back of the Sensor slides between the tabs on the Cradle.

    h. WAIT AT LEAST TWO MINUTES BEFORE ZEROING.

3. If required, ZERO the new Sensor.
4. Package the old Sensors and RETURN THEM TO CHEMDAQ. Packing material, and a return-shipping label is provided for your convenience.

Sensors can change over time, so all gas sensors require calibration at regular intervals. The calibration process ensures that the system is working properly and that the sensor’s response to the gas is accurate.

ChemDAQ specializes in providing gas monitors for various chemical biocides, most of which are highly reactive. The more reactive the gas, the more hazardous the gas and more difficult the calibration process becomes. By housing the calibration process in ChemDAQ’s factory, customers can be assured their calibration has been completed properly, using the same gasses our sensors are designed to detect.

ChemDAQ calibrates each sensor to the appropriate target test gas. The gas mixtures we use are analyzed and certified to be a specific gas concentration. And for those gasses we can’t purchase in a compressed gas cylinder (like Peracetic Acid/PAA), we generate our own vapors to analyze in-house.

The sensors are exposed to both zero air and span gas (test gas containing target gas) and the output from the sensor modules is tracked with a custom-designed computer data acquisition system. This system guides the technician through the calibration process, while measuring the sensitivity, response time and many other parameters of sensor response. 

If all the parameters are met, then the sensor passes. If the sensor does not pass, it is withdrawn from service.

Yes, all of our calibration records are stored in a database that provides full traceability. Any additional testing, such as as-received test data, may be an additional charge.

If a returned sensor is found to be sub par, it will be replaced by ChemDAQ at no cost. Similarly, if a sensor were to ever fail onsite, simply give us a call (1-800-245-3310), and we will send a replacement to you at no charge.

On each new sensor, you will find a calibration sticker that states when the calibration is due for the sensor. This date is normally 4 months from the actual calibration date and should correspond to the time when you should expect the freshly calibrated sensor for exchange.

The calibration on the sensors tends to hold, so if you’re past the date, the sensor is likely still within specification and will be cleared for use until the exchange sensor arrives. The LED indicator on the sensor will help provide guidance on sensor calibration status (see below).

The LED on the sensor is designed to change color depending on the time when calibration is due. The LED will remain green until the sensor is about to reach the 4-month mark.

At around the 4-month mark from calibration, the LED light will change to an orange/yellow color. At that point if the exchange sensor has not arrived, please contact ChemDAQ’s Technical Services team to inquire about your sensor exchange.

If the LED light turns red or flashes red, that indicates that the sensor is due for calibration. SXP customers should not see that condition, but if you do, please contact Technical Services immediately.

At 6 months post-calibration, the sensor will shut off and will not be able to be read by your area monitor or tablet. Please contact Technical Services if you encounter this.