# Operazioni Code Description
121 PDT PRESSURE DIFFERENTIAL TRANSMITTER
122 PSH PRESSURE SWITCH HIGH
123 PSHH PRESSURE SWITCH HIGH HIGH
124 PSHL PRESSURE SWITCH HIGH LOW
125 PSL PRESSURE SWITCH LOW
126 PSLL PRESSURE SWITCH LOW LOW
127 PT PRESSURE TRANSMITTER
128 TDT TEMPERATURE DIFFERENTIAL TRANSMITTER
129 TS TEMPERATURE SWITCH
130 TSH TEMPERATURE SWITCH HIGH
131 TSHH TEMPERATURE SWITCH HIGH HIGH
132 TSHL TEMPERATURE SWITCH HIGH LOW
133 TSL TEMPERATURE SWITCH LOW
134 TSLL TEMPERATURE SWITCH LOW LOW
135 AT ANALYSIS TRANSMITTER
136 EC Control boards (e.g. EMS, LLS, etc.)
137 EJ Interconnecting panels, Junction boxes
138 EL Auxiliary Service Panel (ASP), Lighting, Small Power, tracing distribution boards
139 ER Electrical Power Unit (EPU)
140 ES Motor Driver panel (e.g. VFD, VSD, Soft-Starter, etc.)