Temperature and Humidity



Parameters measured:

Ambient & local probe Temp & RH%, Wood Moisture Equivalent, CO2, motion, tilt, and Power

Parameters measured:
Ambient & local probe Temp & RH%, and Wood Moisture Equivalent

MSR Dataloggers

Parameters measured:

3 axis acceleration, shock, temperature, humidity, light and pressure


Temperature and Humidity is essential in a multitude of applications, such as:

  • Monitoring of concrete setting in construction projects
  • Monitoring building moisture levels following escape of water damage or flooding to ensure restoration is safe to start
  • Monitoring conditions in mould prone dwellings to identify root causes and safeguard occupants health
  • Providing links to Building Management Systems
  • Monitoring and managing environments for agriculture and horticulture
  • embedding technology to monitor in-situ critical health service equipment, data centres, broadcast equipment, pest control equipment as well as food and beverage dispensing equipment
  • This list describes a range of differing applications but is not an exhaustive list of application in which temperature and humidity monitoring is necessary


There are three main measurements of humidity:

  • Absolute humidity is the water content of air
  • Relative humidity [RH] expressed as a percent, measures the current absolute humidity relative to the maximum for that temperature
  • Specific humidity is a ratio of the water vapour content of the mixture to the total air content on a mass basis
  • See Wikipedia for more information


Our customers are mostly interested in RH readings and often “in situ” (which means within specially created cavities in building materials, or air flows of drying equipment), so we have developed a range of custom sensors specifically for those applications, and this includes the award winning HygroBug.


Combined Temperature and Relative Humidity

Regardless of the application area Relative Humidity (RH) and temperature almost always go hand in hand as RH without temperature is almost meaningless. For a given amount of moisture in a set amount of air, the RH value will reduce as temperature increases, because hot air is capable of carrying a larger amount of water. This movement of RH with temperature is one of the many important reasons why it is important to record and display graphically the RH and temperature over time with monitoring systems, and not just take sporadic isolated data points on their own

DBK DRying Data Slide

The graph above demonstrates data taken from the HygroNet. The HygroNet was chosen as the system of choice for use by the BDMA in seminars and test comparisons.



Specific Humidity and Mixing Ratio are derived values from RH and temperature that are calculated on line, in real time on the CDLSmarthub so it can also be displayed graphically per sensor location along with all the other parameters, and have high and low alarms thresholds set for alarm notifications.

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