PA420 Preamplifier0 pages
PA420 preamplifier
The PA420 preamplifier is a loop powered two-wire level transmitter
used in conjunction with all lengths of LP20 level probes. It amplifies
the capacitance measured and converts it to a direct 4-20 mA output
proportional to the liquid level.
A water level control transmitter for steam boilers and process tanks that provides
a direct 4-20 mA output to either a Spirax Sarco level controller or to an alternative
existing PLC control system.
The PA420 is easily commissioned using only two buttons to set up and calibrate the
desired water levels in your level control application. A dual green / red LED indicates
status for confirmation, error or alarm.
The PA420 can be configured to output 4 - 20 mA over a water level range. The 4 - 20 mA
signal may also be inverted for applications that require 20 mA high and 4 mA low
water levels.
Steam boiler application
PA420
LP20