Aeroqual handheld and fixed sensors can be calibrated in the following ways:
- Factory calibration – Type 1 and Type 2 gas sensors, as well as the particulate matter sensors
- Field calibration – Type 1 gas sensors (except ammonia and perchlorethylene)
- Replacement – All sensors
| Product | Field calibration | Replacement / Hot Swap(if applicable) |
|---|---|---|
| Ranger | Zero and span | ✓ |
| Series 500 | Zero and span | ✓ |
| Series 300 | Zero and span | ✓ |
| Series 200 | Zero only | ✓ |
| Series 900 | Zero and span (if you have a Series 500 or 300 monitor) | ✓ |
| Series 930 | ✓ | |
| SM70 | ✓ | |
| SM50 | ✓ |
For more information on sensor technology, which includes images, you may refer to the following page: Sensor technology
Field calibration
Series 300 and 500 handheld monitors can be used to zero and span calibrate Type 1 gas sensor heads, except ammonia and perchlorethylene. Ranger monitors can be used to span calibrate all gas and PM sensor heads. The Series 200 monitor can only be used for a zero calibration.
For field calibration you need to buy the calibration accessory (part AS R42 for Series 300 and Series 500; part RGR CALKIT for Ranger), tubing, gas regulator and cylinders.
How often you field calibrate your sensor head depends on the level of rigour needed in your measurement application. Researchers and industrial hygienists may calibrate before every measurement they take. But for most people, regular calibration is enough to ensure good results. By regular, we mean once or twice per year.
In between calibrations, particularly when the monitor is being used for health and safety purposes, you can perform a bump test to see how the sensor is responding.
Field calibration of ozone
There’s an important difference between ozone and other types of gases. Ozone can’t be stored in bottles. Instead ozone must be generated at source using an ozone generator.
A zero calibration can be done using a zero air bottle, but for a span calibration you must be able to generate ozone. If you don’t have an ozone generator/calibrator, we recommend our Hot Swap service.. Contact Technical Support.
Ozone sensor boards
As the ozone sensor in the SM70 can’t be calibrated, you need to replace the entire sensor board once a year, or sooner if you suspect it isn’t working properly.
The SM50 sensor board is factory calibrated and designed as a single use sensor so it also needs to be replaced when calibration is due.
All replacement sensor boards come with a factory calibration certificate.
Replacement / Hot Swap (if applicable)
Sensor heads have a finite life due to environmental exposure, chemical life and oxidation.
To ensure continuous uninterrupted operation, we recommend you replace sensor heads at least every two years or when the ‘sensor aging’ or ‘sensor failure’ diagnostics appear.
Higher exposure levels or harsh environments can significantly reduce a sensor head’s life expectancy.
Note: Sensor heads can degrade even when unused and in storage.
Factory Certificate
Below is an example of a calibration certificate that is shipped with your calibrated sensor head:
