I-WP401B Pressure Switch idibanisa i-cylindrical structural pressure transmitter kunye ne-2-relay inside tilt LED indicator, enika i-4~20mA current signal output kunye nomsebenzi weswitshi we-alamu ephezulu nesezantsi. Isibane esihambelanayo siya kukhazimla xa i-alamu ivulwa. Imida ye-alamu isetwa ngamaqhosha akhelwe ngaphakathi kwindawo.