Safe Measurements in Hazardous Areas

The Vaisala HMT360 Series Industrial Humidity and Temperature Transmitter was launched in 1999 with the European EEx approval for use in hazardous areas. However, global needs in this strictly controlled application area do not necessarily follow European regulations. This has caused the need to expand the range of local approvals for HMT360 Series Transmitters. In addition to the European approval ATEX100a from PTB (Physikalisch-Technische Bundesanstalt/Federal Institute of Physics and Metrology in Germany), the HMT360 series now has approvals from Factory Mutual in the USA, TIIS in Japan and Test Safe in Australia.

In industrial applications in the USA, Factory Mutual (FM)is an authority on approving instruments for use in potentially explosive atmospheres. Factory Mutual Research electrical equipment testing is based on Factory Mutual Research standards, American National Standards Institute (ANSI) Standards, and International Electrotechnical Commission (IEC)Standards.