Specifications

39
CONFORMS WITH HIGH INTERNATIONAL
STANDARDS
The HMT 360 transmitter has been rigorously tested
and conforms with all requirements for intrinsically
safe instruments and EMC. It is the ideal solution for
controlling humidity and dewpoint in potentially
explosive applications.
SELECT THE CONFIGURATION TO SUIT YOUR
APPLICATION
True flexibility is made possible by microprocessor-
based electronics and a variety of options and
accessories. Customers can specify the configuration
of the HMT 360 transmitter when ordering, but if
required, they can also easily make changes to the
configuration in the field. In addition to the five probe
types, there is a choice of:
 Local display
 Three different humidity sensors
 Two analog output channels
(one standard, one optional)
 LonWorks® interface module
The transmitter measures relative humidity and
temperature, and calculates various humidity quanti-
ties (dewpoint, wet bulb temperature, mixing ratio,
and absolute humidity). All these features make the
HMT 360 transmitter versatile and ensure its suitability
for almost any application.
INTERCHANGEABLE PROBES
The HMT 360 intrinsically safe transmitters are
based on a totally new approach for ease of opera-
tion, installation and maintenance. This new concept
of modularity includes five different types of inter-
changeable probes, enabling fast and easy removal
or reinstallation when required.
Calibration of the probes, for example, can be
performed in a laboratory and the probe then easily
replaced in the field without removing the transmitter.
SAFE INSTALLATION AND PERFORMANCE IN
MOST HAZARDOUS AREAS
In hazardous environments, safe and reliable opera-
tion is a prerequisite for any instrument. Vaisala
knows the humidity business and understands your
need for accurate and trouble-free humidity control.
In these environments, safety is of utmost importance.
HMT 360 Intrinsically Safe
Humidity and Dewpoint Transmitter
with Interchangeable Probes
Our new HMT 360 transmitter is rugged and employs
the latest sensor technology. It operates safely and
reliably even in Division 1.
The HMT 360 transmitters proven performance and
technology conform with the most rigorous interna-
tional standards. And, as future standards change to
reflect new knowledge, you can be confident that the
HMT 360 series will conform to these standards as
well.
The HMT 360 transmitters are an investment for the
future; their longevity combined with trouble-free
operation ensure a long term solution for your
hazardous humidity and dewpoint monitoring
requirements.
OPTIMIZED SENSORS
In addition to Vaisalas standard HUMICAP® Sensor,
two application specific sensors are available:
 For environments with high concentrations
of hydrogen (H
2
)
 For environments with high concentrations
of demanding chemicals.
HMT 360 Transmitter shown with
selection of interchangeable probes.
HMT 360