WP401B maɓallin matsa lamba yana ɗaukar ɓangarorin firikwensin ci-gaba da aka shigo da su, wanda aka haɗe tare da ƙaƙƙarfan tsarin fasaha da keɓance fasahar diaphragm. An ƙera mai watsa matsi don yin aiki da kyau a ƙarƙashin yanayi daban-daban. Matsakaicin ramuwa na zafin jiki yana yin tushe na yumbura, wanda shine kyakkyawan fasaha na masu watsa matsa lamba. Yana da daidaitattun sigina na fitarwa 4-20mA da aikin sauya (PNP, NPN). Wannan matsi na matsa lamba yana da ƙarfi anti-jamming kuma ya dace da aikace-aikacen watsawa mai nisa.