How to Optimize Indoor Air Quality With IAQ Sensors


Posted on Tuesday Apr 13, 2021 at 07:26PM  

Indoor air quality (IAQ) directly impacts the comfort, health, and safety of your building’s occupants. Poor air quality management can lead to significant short and long term health risks for occupants, as well as reduced productivity and concentration. Code compliance and legal scenarios also hang in the balance for a wide range of public and private indoor environments, such as educational facilities. Investing in precision air quality testing equipment helps ensure you are prepared. 

To ensure a healthy and productive environment, you need full-time air quality monitors in place for all occupied areas and other climate-sensitive environments (chemical storage, library archives, museum displays, animal habitats, etc.).

The right indoor air quality sensors can track all of the necessary variables from temperature and RH to airflow measurement and the presence of harmful but odorless contaminants like CO2 or irritating  VOCs. Armed with a continuous data model of your building’s IAQ, you can make informed decisions that will optimize your BAS for efficiency and your HVAC schedule for maximum occupant comfort.

Continuous IAQ testing will also give you critical insights into the health and maintenance needs of your building’s HVAC systems. Smart indoor air quality products not only alert you to substandard environments, but provide helpful feedback about the condition or effectiveness of the systems that are regulating it. The more data you have, the easier it will be to maintain compliance and comfort while saving time and money through preventative action. 


Table of Contents:


Understanding Indoor Air Quality

According to OSHA, the most common causes of subpar IAQ include:

  • Inadequate ventilation
  • Poor HVAC maintenance and upkeep
  • Dampness and moisture damage (from leaks, flooding, or high humidity climates)
  • Contaminated air (indoor or outdoor)

Of further concern is the fact that many indoor air pollutants have no smell.  It’s easy for substances like CO2 or irritating VOCs to develop undetected until occupants experience symptoms like headaches, fatigue, sleepiness, or other respiratory issues. If these side-effects have begun to appear, you may have a problem with IAQ.

Other factors can also play a role in the way your occupants feel about indoor air quality standards. For example, things like odors, inconsistent temperature, air pressure (drafts or stuffiness), added heat from unfiltered sunlight, and more can affect the comfort of the indoor environment and require remediation from air quality management systems.

Indoor Air Quality Management

Properly maintained and updated ventilation, heating, and cooling systems are important. However, they’re only as useful as your ability to manage setpoints, automate a schedule, track performance, predict needs, and respond to deficiencies.

The best approach to measuring indoor air quality is to deploy an integrated network of indoor air quality sensors with a combination of RH, temperature, and VOC outputs in all sensitive locations. Comprehensive data from numerous indoor air quality monitor devices will help maintain a reliable environment. A safe, compliant, and comfortable indoor climate ensures that your building and its occupants will thrive.

Among other things, air quality sensors are used to:

  • Assess the extent of air pollution in your building
  • Evaluate HVAC system performance
  • Enable proactive and preventative maintenance
  • Provide air quality data in a timely manner
  • Better implement and support broader IAQ goals
  • Maintain compliance with indoor air quality standards
  • Track trends in air quality over time

With modern IAQ sensors, it’s even possible to remotely monitor indoor air quality and adjust fan, thermostat, or ventilation schedules from any location. A remote-enabled sensor system, such as the IAQ sensors made by Veris, makes your job easier and more efficient.  You’ll be able to save on costs, prevent waste, minimize downtime, and meet compliance standards with a simple and highly compatible indoor air quality sensor system.

CO2 Sensors

Whereas temperature and humidity are easy to feel, gas emissions are difficult to detect—and can cause discomfort . It’s important to monitor the concentration of airborne pollutants with a carbon dioxide sensor, preferably with the ability to detect volatile organic compounds (VOCs), carbon monoxide, and nitrogen oxide as well.  Here are a few priorities to set when evaluating CO2 wall mount sensors, duct CO2 sensors, and more:

  • Modular: Look for a modular platform of CO2 sensors. This will eliminate extra costs by giving you the ability to mix and match, switch out, or replace individual air quality sensors at any time.
  • Scalable: This helps you maximize your budget. With a flexible design, a CO2 sensor module allows you to match its measurement and accuracy to the ideal price point for your project.
  • Precise: Ideal CO2 monitors will have impressive measurement resolutions across multiple indicators. Our CW2 series air quality sensors at Veris, for example, detect as little as 1 ppm for CO2 or a scale of 0 to 1,000 ppb for total VOC (TVOC).
  • Versatile: An IAQ sensor is at its best when it has not only a CO2 sensor module, but indicators for VOC, RH, temperature, and more all in the same compact sensor package.

Indoor Air Quality Monitors

An innovative  CO sensor, NO2 sensor, CO/NO2 sensor or Refrigerant Sensor will drastically reduce project costs for critical environments like parking garages, sally ports, and similar structures. The remote CO2 sensors from Veris offer several important advantages. You’ll be able to tell instantly, from a distance, if you need to:

  • Address low, high, and sensor end-of-life signals
  • Hot swap the removable sensor element (to prevent future maintenance costs)
  • Adjust the application on the fly with field-selectable output & setpoints

At the same time, Veris sensors give you incredible flexibility and compatibility with removable terminal blocks and the ability to integrate into a variety of control systems (4-20mA, 0-5V, or 0-10V, BACnet MSTP and Modbus RTU). Take a closer look at these leading carbon dioxide and VOC sensors in our CW2 series of CO2 and VOC sensors:

Temperature Sensors

Temperature sensors are critical to monitoring the comfort of living and working spaces, but also for protecting temperature-sensitive materials or environments from mishaps. Many indoor temperature sensors focus on air temperature, but this is only one aspect of ensuring a compliant, safe, and comfortable environment.  Pipe temperature sensors, for instance, help to ensure safe and optimal water temperatures (and to predict maintenance issues with heating systems) . 

Here are a few priorities to set when evaluating wall mount temperature sensors, duct temperature sensors, discharge air temperature sensors, and other HVAC temperature sensors:

  • Compatible: The more compatible and interchangeable the temperature sensors, the better, so that the output is never an issue for your BAS controller. The Veris TW2 series, for example, allows your choice of 4 to 20mA, 0 to 5Vdc or 0 to 10Vdc outputs.
  • Calibration Free: If no calibration is required, you can have the confidence that your indoor temperature sensors are ready and accurate out of the box.
  • Easy to Install & Use: The best temperature sensors simplify installation and service with large wiring terminals on the baseplate, snap-on covers, and user-friendly interface (we offer your choice of touchscreen, LCD, or a faceless sensor controlled only via the BAS).

Veris makes temperature sensors for your every need, including: wall, duct, outdoor, averaging, pipe/immersion, discharge air, contact/strap-on, button, ceiling, and more. With the advantages offered by our indoor temperature sensors, you’ll be able to:

  • Cut down on time in the field and stock fewer devices with a flexible, configurable design
  • Use your existing BAS controller and preferred protocol (BACnet, MSTP, Modbus RTU, etc.)
  • Save money with a scalable design that fits your budget while optimizing HVAC efficiency

With the help of temperature sensing devices, climate-dependent locations like museums, schools, printing shops, hospitals, data centers, and others can protect sensitive materials and stay ASHRAE compliant while also ensuring maximum occupant comfort. The best results will come from averaging temperature sensors over time in a continuous, multi-sensor system that models long-term trends and predicts future needs. Take a closer look at these leading wall temperature sensors in our TW2 series of temperature sensors:

Few indoor air quality sensor platforms can offer the same advanced precision and robust data models, which will help keep building occupants comfortable and temperature-sensitive environments or materials safe.

Humidity Sensors

Humidity sensing systems are an often overlooked area of building climate control, but quality humidity sensors are no less essential than thermostats, CO2 sensors, fire detectors, VOC sensors, and the like. The relative humidity (RH) of an indoor environment impacts occupant comfort, personal safety, and even the integrity of sensitive materials or equipment. For example, hospitals with high humidity are at risk of breeding mold or creating environments conducive to pathogen growth. A laboratory setting, on the other hand, may require higher humidity than most people find comfortable. 

A network of humidity sensors helps you to better optimize the RH of your indoor climate. Here are a few priorities to set when evaluating humidistats, duct humidity sensors, wall humidity sensors, and more:

  • Field-Replaceable: Minimize downtime with humidity sensors that feature field-serviceable and field-replaceable components.  Delicate materials in museums, printing shops, and other locations can’t wait for inefficient maintenance.  In populous structures like schools, the comfort of hundreds hangs in the balance.
  • Multi-Purpose: While an RH sensor has value on its own for humidity control, you’ll get more from your sensor with a combination platform that can be fitted to sense both humidity and temperature from the same device.
  • Compatible: Versatile humidity sensor outputs makes them easier to work with your existing humidity controller or BAS. Whether you need 4 to 20mA, 0-5Vdc, 0-10Vdc, resistive temperature, BACnet MSTP, or Modbus RTU, a high-compatibility sensor system will be able to accommodate your needs.

The Veris HW2 series of indoor RH sensors was designed to bring all of these qualities to a simple, easy-to-install wall humidity sensor. You’ll  also have the freedom to select from three interface options to suit your needs, including a color touchscreen, three-button LCD display, or a subtle non-display (blank face) sensor that’s exclusively controlled through the BAS. Veris humidity sensors can be used to:

  • Track both temperature and RH data with fewer devices
  • Protect sensitive environments with field-selectable setpoints
  • Optimize HVAC efficiency and save money with predictive maintenance

A detailed long-term data model of the indoor climate, from a multi-sensor system, is the best way to monitor and maintain a consistent, comfortable, or ideal atmosphere in climate-dependent facilities. If you’re looking for an efficient humidity sensing solution, take a closer look at these leading wall humidity sensors in our HW2 series of humidity sensors:

Sensor Platform Interfaces

Your complete network of indoor air quality sensors will likely include devices in a wide range of locations, from room sensors in highly trafficked lobby areas to duct sensors in remote maintenance areas or unreachable wall sensors near the ceiling of large rooms.  For this reason, it’s best to use a sensor platform that offers a choice of interfaces to suit the needs of each individual device.

The Veris IAQ room sensor platform, for instance, offers these three interface options:

  • Touchscreen Display: A modern touchscreen sensor interface brings flexibility and intuitive in-the-field operation to a wall mounted sensor. A backlit high-resolution display makes the sensor touchscreen easier to read than LCD, and provides a sleek aesthetic to your network of air quality sensors. The touchscreen interface also offers an innovative stoplight feature with a color-changing background to indicate CO2 status.
  • 3-Button LCD Display: LCD is a cost-effective solution with a convenient and straightforward 3-button operation. They’re simple to operate while technicians are wearing gloves and perfect for economically-minded installations.
  • Non-Display: A blank-face sensor is best for areas in which you do not want room occupants to access or operate the settings on the sensor device. These are also useful for placing subtle sensors in locations that would be difficult to operate in the field (such as near the roof in a tall ballroom).

It’s possible to mix and match sensor interfaces throughout your installation, so that each device is optimized for the context. If you need more information, check out our brief guide on choosing an IAQ sensor platform.

Find the Right Solution With Veris

Indoor air quality doesn’t need to be complicated. If you have any questions we haven’t answered here, or want to learn more about IAQ sensors, installation, integration, interfaces, outputs, or anything else, don’t hesitate to contact Veris for help. Our expert team is always available to offer personalized advice or guide you towards the right solution for your building.

Looking for some of the indoor air quality sensors we’ve discussed? You’ve come to the right place. Shop online now for sensors in the category you need:

Veris is committed to providing high-quality energy, environmental, and IAQ sensor solutions at the right price for your budget. Our knowledgeable staff will work with you on a custom order scaled to the precise needs of your facility and your BAS. And if you’re ever in need of technical support, simply contact us and we'll be ready to help.

Indoor Air Quality Monitors



Indoor Air Quality Monitors

Comply with indoor air quality standards for healthy and safe building environments

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