Nā Miki Wai Ultrasonic vs. Electromagnetic: He Hoʻohālikelike Piha

Nā Kumu Hana Koʻikoʻi

Hilinaʻi nā mika wai Ultrasonic i ka ʻokoʻa manawa transit a i ʻole ka hopena Doppler. Hoʻouna nā hiʻohiʻona manawa transit i nā hōʻailona ultrasonic me a kūʻē i ke kahe wai; helu ka manawa ma waena o kēia mau hōʻailona i ka wikiwiki o ke kahe. ʻO nā hiʻohiʻona Doppler, ma ke ʻano ʻē aʻe, ʻike i nā neʻe alapine mai nā nalu ultrasonic e lele ana mai nā ʻāpana i loko o ka wai, e hana maikaʻi ana me ke kahe paʻa ʻole.

Hoʻohana nā mika wai electromagnetic i ke Kānāwai o Faraday no ka Induction Electromagnetic. Hoʻokumu lākou i kahi kahua magnetic like ma waena o ka paipu. Ke kahe ka wai alakaʻi ma o kēia kahua, hoʻopuka ia i kahi ikaika electromotive (EMF) i loko o nā electrodes—pili pololei ka ikaika EMF i ka wikiwiki o ke kahe ʻana, e hiki ai ke ana pololei.

Nā ʻokoʻa hana koʻikoʻi

Ma ke ʻano o ka pololei, loaʻa pinepine i nā mika electromagnetic kahi lihi iki: mālama ka hapa nui i ka pololei ±0.2% a i ±0.5% ma waena o nā pae kahe, ʻoiai ʻo nā hiʻohiʻona ultrasonic mai ±0.5% (kalepa) a i ±0.2% (ʻoihana). No ka laulā kahe, hāʻawi nā mika electromagnetic i kahi lakio hoʻohuli a hiki i ka 1:1000, e lawelawe ana i nā kahe haʻahaʻa loa a me ke kiʻekiʻe. Hiki i nā mika Ultrasonic ke hōʻea i ka 1:500, ikaika mau akā ʻaʻole i maʻalahi no nā kahe koʻikoʻi.

ʻO ka hoʻohālikelike ʻana o ka pāpāho kahi mahele nui. Hana nā mika Ultrasonic me nā wai conductive a me nā wai non-conductive (e laʻa, ka wai maʻemaʻe, nā kemika), e kūpono ai lākou no nā ʻoihana e like me nā lāʻau lapaʻau. Pono nā mika electromagnetic i ka wai me ka conductivity ≥5 μS/cm—hāʻule lākou me ka wai maʻemaʻe a i ʻole ka aila.

ʻOkoʻa nō hoʻi nā pono o ke kau ʻana. Pono nā mika ultrasonic manawa transit i 5-10 mau anawaena paipu pololei ma luna/i lalo no ke kahe paʻa, ʻoiai ʻoi aku ka maʻalahi o nā hiʻohiʻona Doppler. Pono nā mika electromagnetic i 3-5 mau anawaena pololei wale nō, a pale aku kā lākou mau electrodes i kau ʻia ma luna o ka flush i ka hoʻopilikia ʻana o ke kahe.

Nā Pōmaikaʻi a me nā Palena

ʻIke ʻia nā mika Ultrasonic i ka versatility: hoʻokomo ʻia nā mana clamp-on ma waho, ʻaʻohe pono o ka hoʻololi ʻana i ka paipu—maikaʻi no nā retrofits. Loaʻa iā lākou ka mālama haʻahaʻa, me ka ʻole o nā ʻāpana neʻe e pili ana i ka wai. Eia nō naʻe, hiki i ka turbidity kiʻekiʻe a i ʻole nā ​​​​​​pehu ea ke hoʻopilikia i ka pololei, a ʻoi aku ke kumukūʻai o nā hiʻohiʻona ʻoihana.

ʻOi aku ka maikaʻi o nā mika electromagnetic i nā kūlana ʻino: mālama nā electrodes pale i ka palaho (tantalum, platinum-iridium) i ka wai hoʻoneoneo a me ka wai sediment kiʻekiʻe. Hoʻohui maʻalahi lākou me nā ʻōnaehana IoT no ka nānā ʻana i ka manawa maoli. Akā, ʻo kā lākou hilinaʻi conductivity e kaupalena ana i ka hoʻohana ʻana, a ʻo ka hapa nui e pono ai ka mana o waho—ʻaʻole kūpono no nā wahi mamao.

Nā hiʻohiʻona noi kūpono

He kūpono loa nā mika Ultrasonic no nā hale noho/hale kalepa (nā anawaena liʻiliʻi, ka wai paipa), nā ʻōnaehana wai maʻemaʻe (nā lāʻau lapaʻau, nā keʻena hoʻokolohua), a me ka hoʻoponopono hou ʻana i nā paipu kahiko. Kūpono nō hoʻi lākou no nā paipu kūlanakauhale a ʻoihana paha me ke anawaena nui.

ʻOi aku ka maikaʻi o nā mika electromagnetic no ka kaohi ʻana i nā kaʻina hana ʻoihana (kemika, nā hale hana wai ʻino), ka hoʻolaha ʻana o ka wai kūlanakauhale (ʻike ʻana i ka leaka), nā hale kalepa (hoʻohana wai hui ʻia), a me ka hoʻoinu wai mahiʻai (ka wai honua alakaʻi).

Hopena

He holomua nā mika ʻelua, akā ʻo ko lākou mau ikaika ke alakaʻi i ke koho ʻana. E koho i ka ultrasonic no nā mea hana ʻole a i ʻole nā ​​​​​​mea hoʻoponopono; electromagnetic no ka pololei kiʻekiʻe me nā mea hana a i ʻole nā ​​​​​​wahi ʻino. ʻO ka hoʻomaopopo ʻana i kēia mau ʻokoʻa e hōʻoiaʻiʻo ana i ke ana wai kūpono, inā no ka bila, ka mana ʻoihana, a i ʻole ka hoʻokele kūlanakauhale.