WP311B Nau'in Rarraba Jifa-in PTFE Probe Anti-lalacewar Ruwa Level Sensor, wanda kuma aka sani da firikwensin matsa lamba na hydrostatic ko firikwensin matakin ƙasa, yana amfani da abubuwan da aka shigo da su na anti-lalata diaphragm, an ajiye su a cikin madaidaicin PTFE mai dorewa. Ƙarfe na saman ƙarfe yana aiki azaman ƙarin kariya ga mai watsawa, yana tabbatar da hulɗar santsi tare da ma'aunin ruwa mai auna. Ana amfani da kebul na bututu na musamman don sanya ɗakin matsa lamba na baya na diaphragm daidai ya haɗa da yanayi. WP311B matakin firikwensin yana da ma'auni daidai, kwanciyar hankali na dogon lokaci mai kyau da kyakkyawan hatimi da aikin lalata, WP311B kuma ya dace da ma'aunin ruwa kuma ana iya saka shi kai tsaye cikin ruwa, mai da sauran ruwaye don amfani na dogon lokaci.
WP311B yana ba da kewayon ma'auni mai faɗi daga 0 zuwa mita 200 H2O, tare da zaɓuɓɓukan daidaito na 0.1%FS, 0.2%FS, da 0.5%FS. Zaɓuɓɓukan fitarwa sun haɗa da 4-20mA, 1-5V, RS-485, HART, 0-10mA, 0-5V, da 0-20mA, 0-10V. Ana samun kayan bincike / kwasfa a cikin bakin karfe, PTFE, PE, da yumbu, yana ba da yanayin aiki daban-daban.