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Portable RH&T Meters

April 15, 2014
Vaisala Portable GM70 with diffusion probe and case

Vaisala HM40 Portable Relative Humidity and Temperature instrumentation offers a low cost solution to spot check RH&T applications. Available with fixed probe and probe on a 1.2m remote ‘curly cable’, the Vaisala HM40 comes fitted with the reliable HUMICAP sensor from Vaisala ensuring a stable, responsive sensor technology.  Typical specifications as follows:

  • Humidity measurement range 0…100 %RH
  • Operating temperature range -10 °C…+60 °C
  • Display a wide range of quantities: RH, T, Td, Tw, a, x, h
  • Graphical display indicates when measurement has stabilized
  • Compact and robust housing
  • Hold-button to freeze the screen and save the reading
  • Multilingual user interface with 10 languages
  • The interchangeable measurement probe HMP113 can be user calibrated
  • Incorporates the proven Vaisala HUMICAP 180R® sensor


Vaisala HM40 Portable RH&T instrumentation Product Page