2) Used SMC Digital Pressure Switches ISE30 and ISE40 -- 1/8"NPT

SMC ISE40-M5-62L NSFP ISE40M562L PRESSURE SWITCH DIGITAL 12-24VDC .1-1MPA ANALOG

SMC ISE40-01-22L PRESSURE SWITCH 12-24V

SMC ISE40-01-22L DIGITAL PRESSURE SWITCH H/PRECISION INTERGRATED SENSOR

SMC Pressure Switch - ISE40-T1-22L w/Warranty

SMC ISE40-01-22L-M Pressure Switch ISE400122LM

SMC ISE40-T1-22 Pressure Switch ISE40T122

SMC DIGITAL VACUUM SWITCH ISE40-T1-62L 12-24VDC 0.1-1.0 MPa