Series 500 – Portable Air Quality Monitor

Download the S500 Series PC software here.

There are many different types of outdoor air pollution. Measuring them all would be too expensive, so regulators focus on a smaller group of common air pollutants, sometimes known as the criteria pollutants. The criteria pollutants are:

• Nitrogen dioxide (NO₂)
• Sulfur dioxide (SO₂)
• Carbon monoxide (CO)
• Ozone (O₃)
• Particulate matter (PM)

As always, requirements should be confirmed with your local regulatory body.

Sensors are housed within an interchangeable ‘sensor head’ that attaches to the monitor base. You can choose from up to 28 different gas and particulate sensor heads. Each sensor head contains a single gas or particle sensor. Swapping sensor heads takes seconds. and no configuration or recalibration is required.

You can find specifications for our sensor heads here:

Aeroqual-Portable-Fixed-Sensor-Specifications.pdf

Note: Accuracy may drift as the sensor ages.

Aeroqual recommends replacement after two years. However, higher exposure levels or harsh environments can lead to a significant reduction in life expectancy. Your monitor display is likely to indicate Sensor Failure or Sensor Ageing if the sensor is nearing the end of its useful life.

Note: Sensor heads may degrade even when unused and in storage.

How many sensors can I use on the monitor at once?

You can only connect one gas or particulate sensor head at a time to monitor. However, you are able to connect the optional temperature and humidity sensor at the same time as a gas or particulate sensor head.

Can I use the PM sensor head with any portable monitor?

The PM sensor is compatible with Series 300/500 monitors with software version 6.4 introduced in November 2014.

What is the PPM to mg/m³ conversion factor?

PPM is an absolute measurement, whilst mg/m3 varies depending upon pressure and temperature. The portable monitor measures in PPM and applies a conversion factor if you wish to measure in mg/m3.

NH₃ - 0.76, CO - 1.25, CO₂ - 1.96, CL₂ - 3.16, CH₂O - 1.34, H₂ - 0.082, CH₄ - 0.72, H₂S - 1.52, NO₂ - 2.05, NMHC - 2.5, O₃ - 2.14, C₂CL₄ - 6.78, SO₂ - 2.86, VOC - 2.5, PM - N/A*

*as particulate matter varies in size, unlike a gas molecule, PPM is not a valid unit of measurement

Do I return the instrument for calibration?

Only the sensor head needs to be calibrated. The base unit does not need to be calibrated. All parameters are stored on the sensor head.

The sensor head calibration should be completed after the first year. Aeroqual does not recommend a second factory calibration, but rather replacement after two years of operation.

See a range of frequently asked questions on calibration here.

How long can I log data for (Series 500 only)?

The Series 500 handheld unit can store a limited number of data points (8188), meaning that the length of time that data can be logged depends upon the frequency and number of data points recorded. For example:

• If you are logging every minute for one gas (i.e., one data point per minute), you can log for 8188 minutes.
• If you are logging every minute for one gas, temperature and humidity (i.e. 3 data points per minute), you can log for 2729 minutes.

Decrease the logging frequency for the ability to log over a longer timeframe.

Note: Once capacity is reached, new data will begin to overwrite the oldest logged data.

What communication options does the portable monitor have?

S300: 0-5V Analog output (current reading only)

S500: 0-5V Analog output (current reading only), RS232 (current, logged data and instrument control) to PC software via USB adapter. RS232 protocol available upon request for third-party software integration.

What is the “Control” function?

This is designed to control generation of a gas such as ozone from an ozone generator. The control pin can be wired to control a gas concentration between upper and lower concentration limits. The upper and lower limits can be set by the user via this control function.

Refer to the relevant section of the user guide for wiring instructions.

What accessories are available for the portable monitors?

Aeroqual offers a range of accessories to suit your application. See the range here.

For support on your Series 500 instrument, click here to visit our support centre.