The HDI model # 3300 is a battery powered, stand alone, electronic temperature sensing and
display system. The display is a liquid crystal display (LCD), which includes both a numeric (5
digits) representation (for accuracy) and a bargraph (101 segments) representation (for trend),
battery low indicators, optional slaved units, optional recorders and alarms may be included.
The sensor itself is housed in a stainless steel case. The sensor is commonly housed in either
a 1502 hammer union or a flange. Any style of housing may be specified by the customer.
Once calibrated, the gauge and the sensor become a matched pair and the substitution of any
component, including wire, requires recalibration of the system. The HDI Model # 2400 system
will directly replace any panel gauge (6" diameter) with either a four bolt (90°) or a three bolt
(120°) pattern without any modifications.