Series 300 Monitor (S-300) in Enclosure

The Aeroqual Series 300 in an Enclosure helps eliminate dust and reduces water from entering the sensor to protect it and prevent it from being damage. The Series 300 has relays and voltage outputs that can interface with your dataloggers or control systems.

As low as $1,860.00

The Aeroqual Series 300 Monitor with Sensor Head and in an Enclosure gives you the benefits of both a Controller and protecting the sensor from dust and water. It has relays and voltage outputs, letting you interface with control systems, equipment, or dataloggers. Like all of the Aeroqual handhelds, the Series 300 is available with a variety of sensor head options, letting you specify the gas and range that you need (see the drop-down list above). This kit comes with a single sensor head, but additional sensor heads can be purchased on our Replacement Sensors page.

How to Order:

Step-1: Choose your gas sensor from the Sensor Head drop down box.  For more information on gas sensors see our Replacement Sensors page

Step-2: Choose your options and required related products.  Note: Aeroqual sensors are extremely versatile and customizable.  Should you have questions, feel free to call or e-mail.

Step-3: Add to cart, the monitor and options necessary.  When in the cart you can continue shopping to add additional Sensors to your order.


Environmental or Outdoor Enclosures:

The Environmental Enclosure will allow the Series-300 to be placed in similar environments as the R-13 sensor head adapter.  With the clear cover gas readings from the Series-300 will still be possible, along with all control and safety alarms still used.  In wet, or dusty environments this enclosure is the perfect method to implement the features of the Series-300 into your facility.  This is great for food processing applications where ozone or other gasses are used in wet and wash-down environments.

 Note: When using an enclosure the sensor is calibrated specifically for use inside that enclosure.

Series-500 Environmental enclosure

The S-320 is the old part number for this product, now it's the S-300 in an Enclosure.

The Series 300 Ozone Monitor is a versatile monitor with the ability to accurately measure 4 different ranges of ozone sensor as well as temperature and relative humidity, if required. It is designed for ozone monitoring and control in a variety of applications. Ozone concentrations can be displayed in either ppm or mg/m3 on the large LCD display. There are also user defined high and low alarm set points which will trigger an audible alarm when the ozone concentration exceeds the set point.

A key feature of the Series 300 is the ability to operate in control mode. Upper and lower control limits can be easily set directly on the display. Using the 0-5V output the Series 300 can be used to switch on or off an externally connected device, such as an ozone generator, or system in the presence of a predetermined level of gas.

For those wanting to recalibrate in the field the Series 300 allows adjustment of zero and span. Together with the R42 Calibration Accessory and an ozone generator or gas calibration kit this function allows the sensor head to be fully recalibrated without having to return it to the factory. Alternatively the sensor head can be returned to Gas Sensing for a factory calibration which includes a renewed calibration certificate. For more on calibrating the Series 300 click here.




     -One monitor compatible with up to 30 different sensor

     -Audible alarm functionality

     -Remote sensor capability

     -Long life lithium battery technology

     -Zero and span calibrate in the field



     -Source and leak detection

     -Process control

     -Health and safety monitoring

     -Indoor air quality


What's Included:

     -Water & dust proof enclosure

     -Monitor Base

     -LCD Display

     -Lithium battery and charger

     -0-5 VDC output

     -Zero and span calibration adjustment

     -Low and high audible alarm



For those wanting to recalibrate on site the Series 300 allows adjustment of zero and span. Together with the R42 Calibration Accessory and an ozone generator this function allows the sensor head to be fully recalibrated without having to return it to the factory. Alternatively the sensor head can be returned for a factory calibration which includes a renewed calibration certificate.

 Every sensor head we send out comes with a calibration certificate. Click here to see a visual explanation of the contents of your calibration certificate.


Data Logging:

Data logging with the AQ-300 is possible with an external data logger, such as, the DL-3.  Using the 0-5 vdc output signal from the Series-300 the DL-3 can log and save gas measurements.  This is a great addition for your Series-300 monitor if data logging needs are a new requirement, or if portability of your data is a requirement.

 DL-3 Ecosensors data logger



Battery Replacement:

The Series-300 ships with a rechargeable and replacement battery.  Extra batteries can be purchased to keep as a spare with your Series-300.  This will allow long term field measurements.  See image below for battery location and replacement.

 Series-500 battery replacement


Compare the Series 300 and 500 monitors:

Compare the Aeroqual handheld devices


Aeroqual Series-300 in Enclosure


Aeroqual Series-300 in Enclosure

Interchangeable sensor head Yes Yes
Digital LCD Display Yes Yes
Min, Max, Average readings on screen Yes Yes
Field Replaceable Battery Yes Yes
Remote Sensor Capability Yes Yes
Temp and HR Sensor optional Yes Yes
External Control Outputs Yes Yes
Audible Alarm Yes Yes
High and Low Alarms Yes Yes
0-5 VDC Analog output Yes Yes
Zero Calibration capability Yes Yes
Span Calibration capability Yes Yes
Internal Data Logging Capability No Yes

PC connection cables and capability




View a brochure with specifications on the Series-300 and 500.


Sensor Specifications for Handheld Aeroqual Series-300 and 500

Aeroqual handheld sensor specifications Click on image for full size image

 Full list of technical information and specifications for all Aeroqual sensors


Series 300 Product Brochure

Series 300 Quick Guide

Series 300 Product Manual

 Links to more info:

Calibration information

Tech info and Specifications on each available Gas Sensor


Video Showing the Min, Max, Average function.

More Information
Manufacturer Aeroqual
Rental Period Weekly
Call For Price No
Gas Ammonia (NH3), Carbon Monoxide (CO), Chlorine (Cl2), Formaldehyde (CH2O), Hydrogen Sulfide (H2S), Nitrogen Dioxide (NO2), Ozone (O3), Sulfur Dioxide (SO2), VOC
4-20 mA Output No
Relays 1 Alarm Relay + 1 Control Relay
Field Replaceable Sensor Yes
Min, Max, Avg Yes
Voltage Output 0-5 V
Power Requirements 12V DC via supplied adapter
Datalogging No
Rechargeable Yes
Field Replaceable Battery Yes
Warranty 1 Year
Audible Alarm Yes
Calibration Annually
Sensor Life 2 Years
Range Gas Dependent
Unit Features

-Enclosure Protects from Elements

-Backlit LCD Display

-Field Replaceable Sensor

-Control Relays & Alarms

Sensor Range

0-0.05 ppm

0-0.15 ppm

0-0.5 ppm

0-10 ppm

Resolution Gas Dependent
Integrated Relays Yes
Sensor Range

Gas Dependent

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