The easy-to-use Vaisala HM40 is a compact and portable humidity meter that provides reliable measurements in a wide range of applications. It is the ideal spot-checking tool for everything from structural moisture measurement and air conditioning systems to humidity measurement in industrial production processes and life science applications. The HM40 has a large, user-friendly graphical display and easy-to-use push buttons. In addition to relative humidity and temperature, the HM40 provides five calculated humidity parameters, all of which are available in metric and non-metric units. Included in delivery is a certificate of calibration which is traceable to national and international standards. There are four different models available: HM41, HM42, HM45, and HM46. Calibrating the HM40 is easy. The meter or the probe can be sent to a Vaisala Service Center for recalibration. Alternatively, calibration can be completed on site by users with a humidity reference such as the...

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