ATH Series of Temperature and Relative Humidity Sensors

Humidity and temperature sensors available today come in varying degrees of quality – in ease of long-term maintenance, stability and durability. In response to the experiences of researchers and customers, the ATH-2S was developed to have greater instrument accuracy, easier upkeep, and an extended life. The ATH-2S is ideally suited to in-canopy measurement and for use in calculation of Vapour Pressure Deficit. Sensor Stability & Calibration Drift An understanding of how temperature and humidity sensors function over time in the installed environment should be central to any monitoring project.

Questions of long-term drift and recalibration are often overlooked when purchasing a sensor. Drift is inevitable, and is caused by several factors including vibration, environmental contamination, or extreme temperature fluctuations. Previously, reducing inaccurate measurements (caused by sensor drift) meant undertaking a regular, time-consuming, preventative maintenance calibration program. The unique design of the ATH-2S addresses these problems at the core - providing a user replaceable sensing chip which can be installed onsite with no downtime or return to manufacturer required.

Humidity and temperature sensors available today come in varying degrees of quality – in ease of long-term maintenance, stability and durability. In response to the experiences of researchers and customers, the ATH range of microclimate sensor was developed to have greater accuracy, easier upkeep and an extended life. The ATH-2S and ATH-2A provide precision measurement of temperature & humidity.

The ATH-VPD additionally incorporates the following calculated values:

• Measured:
  • Temperature °C.
  • Air Humidity %.
  • Air Pressure Pa.
• Calculated:
  • Dew point °C.
  • Water vapor density g/m3.
  • Vapor pressure deficit Pa.
  • Saturated vapor pressure Pa.
  • Actual vapor pressure Pa.