I-WP401B Pressure Switch ihlanganisa i-cylindrical structural pressure transmitter ne-2-relay ngaphakathi kwesikhombi se-LED esitshekile, ihlinzeka ngokuphuma kwesignali yamanje engu-4~20mA kanye nomsebenzi wokushintsha we-alamu yomkhawulo ongaphezulu nophansi. Isibani esihambelanayo sizocwayiza lapho i-alamu icushiwe. Imikhawulo ye-alamu ingasethwa ngokhiye abakhelwe ngaphakathi esizeni.