Overview
Model PT295 is a single point fixed sensor for the detection of toxic gases in ambient
air. Table I lists the target gases and the detection ranges. PT295 displays the gas
concentration and transmits a linear 4-20mA analog output signal that is
proportional to the gas concentration displayed. The unit is also equipped with a
form “C” type alarm relay contacts.
The sensor also features a non-intrusive calibration. Calibration is performed by
activating an internal magnetic switch. All calibration and alarm configuration data
is maintained in a non-volatile memory
Sensor transmitter board and connection board are enclosed in an explosion proof
junction box (rated Class I, Div 1 & 2). The unit consists of three assemblies, the
transmitter and display board, the connection board, and the stainless steel sensor
head assembly. Each of these assemblies can be purchased separately.
Figure 1. Model PT295 Sensor
PT295 Series Toxic Sensor Rev 5.1
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