The Hybrid series model HTx104-P is a new generation of EBTRON's
advanced thermal dispersion airflow measurement technology. It combines
features of EBTRON's successful Gold and Silver Series product lines.

The HTx104-P is ideal for dilution ventilation control of outside air intake flow
rates for ASHRAE® 62.1-2007 compliance and is paramount for the acquisition
of LEED® points. In addition, this flow technology is essential for the control
of the pressurization flow and building and space pressurization, a prerequisite
for moisture and contaminant management for indoor air quality
(IAQ), healthcare and process applications. Sensor probes can be directly
installed in outside air intakes, supply and return ducts, exhaust ducts and
air handler cabinets to accurately measure airflow rates.

Unlike pitot arrays, EBTRON advanced thermal dispersion technology uses
heat transfer rather than differential pressure to determine airflow. Accuracy
is percent of reading, rather than percent of full scale and sensitivity increases
as the flow rate decreases. Individual sensors, rather than a single averaging
pressure manifold, assure true average airflow in extreme velocity profiles
typical for HVAC applications. Pitot arrays have significant averaging
error in extreme velocity profiles since only a single sensor, the pressure
transducer, is used to convert the average velocity pressure to airflow.

EBTRON uses only precision "bead-in-glass" thermistor probes. These
extremely stable and reliable thermistors, developed for use in the space
program, are also used in precision milli-degree laboratories where precise
temperature control is required with negligible long-term drift. Competitors
typically use inexpensive "chip" style thermistors that do not provide the
same long-term performance and reliability. These devices are subject to
drift and mechanical failure over time. EBTRON sensing probes and transmitters
are designed for years of trouble free operation. Periodic field calibration
and maintenance are not recommended or required in most environments1.