PPM Technology

PPM Technology

Museums, galleries, libraries and archives are at risk from indoor pollutants

Source: PPM Technology

Indoor Air Quality is a significant issue in libraries, museums and archival collections - due mainly to the fact that many compounds, as well as unsuitable temperature and humidity has a deteriorating effect on many valuable and precious items stored in these buildings.

Air pollution can attack heritage materials. Museums, galleries, libraries and archives are all at risk. Deterioration is usually slow and progressive but prolonged exposure can cause severe damage. Different materials are susceptible to different pollutants.

Nitrogen Dioxide, Sulphur Dioxide, Ozone, Hydrogen Sulphide and Formaldehyde tend to be most common and damaging. The below table outlines the effect these gases has on different materials which can be found in these environments.

Sulphur Dioxide

  • Attacks photographic materials
  • Tarnishes metals
  • Damages paints and dyes
  • Embrittles and discolors papers.
  • Reduces strength of textiles.

Nitrogen Dioxide

  • Induces fading in textiles dyes
  • Reduces strength of textiles
  • Damages photographic film


  • Cracks rubber
  • Induces fading in dyes
  • Attacks photographic materials


  • May be oxidized to formic acid – effects include -corrodes certain metals, especially lead, zinc and copper alloys with high lead content.
  • Attacks calcareous materials such as seashells
  • Attacks mineralogical specimens

For accurate understanding of a building’s indoor air quality, it is advised to simultaneously monitor multiple indoor air quality parameters. PPM Technology’s range of continuous IAQ monitoring instruments enable instantaneous monitoring of a number of parameters within a single instrument. PPM Technology’s monitors utilizes a combination of different sensor technologies to enable rapid response, high sensitivity and stability and excellent accuracy.

- Automatic IAQ profiling provides instantaneous graphical presentations of the levels of gaseous pollutants in the working environment.

- Each unit is capable of continuously measuring up to 7 customer specified IAQ parameters simultaneously.

- A building-wide network of monitoring units is possible to offer complete air quality monitoring.

- Each unit can be configured with unique sensor specifications if required.

- Relays can be triggered for 3rd party alarms and systems such as air-con.

- Immediate warnings if a dangerous level of a hazardous substance is detected.

- The user can automate sampling and log data at specific times using the specialist PPMonitor software.

- Analysis of the recorded data allows for more efficient management of resources and energy.

- Able to troubleshoot, identify and eliminate the causes of poor air quality.

- Touch Screen, Wireless, Compact and Stand-Alone instruments available.

Please visit www.ppm-technology.com for more information.

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