Esplorazione dei vari tipi di trasmettitori di flusso: una guida completa

I trasmettitori di flusso sono componenti integrali in un’ampia gamma di settori, dal petrolio e gas al trattamento dell’acqua, e svolgono un ruolo cruciale nel monitoraggio e nel controllo del flusso di liquidi, gas e vapore. Questi dispositivi misurano la portata del flusso e la convertono in un segnale che può essere letto da un operatore o da un sistema di controllo. Esistono diversi tipi di trasmettitori di flusso, ciascuno con le sue caratteristiche e applicazioni uniche. Questo articolo ha lo scopo di fornire una guida completa ai vari tipi di trasmettitori di flusso.

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Uno dei tipi più comuni di trasmettitori di flusso è il trasmettitore di flusso a pressione differenziale. Questo dispositivo funziona misurando la differenza di pressione attraverso una strozzatura nel tubo, come un orifizio, un Venturi o un ugello di flusso. La differenza di pressione è proporzionale al quadrato della portata e il trasmettitore la converte in un segnale che può essere letto da un sistema di controllo. I trasmettitori di flusso a pressione differenziale sono ampiamente utilizzati grazie alla loro affidabilità, precisione e versatilità.

Modello Misuratore pH/ORP-810 pH/ORP
Intervallo 0-14 pH; -2000 – +2000mV
Precisione \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\±0,1 pH; \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\±2mV
Temp. Comp. Compensazione automatica della temperatura
Opera. Temp. Normale 0\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\~50\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\℃; Alta temperatura 0\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\~100\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\℃
Sensore sensore pH doppio/triplo; Sensore ORP
Visualizzazione Schermo LCD
Comunicazione Uscita 4-20 mA/RS485
Uscita Controllo relè doppio limite alto/basso
Potenza AC 220 V\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\±10 per cento 50/60 Hz o CA 110 V\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\±10 per cento 50/60 Hz o 24 V CC/0,5 A
Ambiente di lavoro Temperatura ambiente:0\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\~50\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\℃
Umidità relativa\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\≤85 per cento
Dimensioni 96\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\×96\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\×100mm(H\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\×W\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\×L)
Dimensione foro 92\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\×92mm(H\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\×W)
Modalità di installazione Incorporato

Un altro tipo di trasmettitore di flusso è il trasmettitore di flusso magnetico, che viene utilizzato per misurare la portata di liquidi e fanghi conduttivi. Questo dispositivo funziona applicando un campo magnetico al fluido e misurando la tensione indotta dal movimento del fluido attraverso il campo. La tensione è direttamente proporzionale alla portata, fornendo una misurazione estremamente accurata. I trasmettitori di flusso magnetico sono particolarmente utili in settori quali il trattamento delle acque reflue e la produzione di alimenti e bevande, dove la misurazione non invasiva è essenziale.

I trasmettitori di flusso a turbina sono un altro tipo comune, utilizzato per misurare la portata di liquidi e gas. Questi dispositivi funzionano posizionando una turbina nel percorso del flusso, che ruota ad una velocità proporzionale alla portata. La rotazione viene rilevata da un sensore che la converte in un segnale leggibile da un sistema di controllo. I trasmettitori di flusso a turbina sono noti per la loro elevata precisione e tempi di risposta rapidi, che li rendono ideali per applicazioni come la misurazione del carburante e la distribuzione dell’acqua.

I trasmettitori di flusso a ultrasuoni sono un tipo di trasmettitore di flusso non invasivo che misura la portata di liquidi e gas utilizzando le onde sonore. Questi dispositivi funzionano trasmettendo onde ultrasoniche attraverso il fluido e misurando il tempo impiegato dalle onde per viaggiare. La portata viene calcolata in base alla differenza del tempo di percorrenza tra le onde a monte e a valle. I trasmettitori di flusso a ultrasuoni sono particolarmente utili nelle applicazioni in cui il fluido è corrosivo o sporco, poiché non entrano in contatto con il fluido.

Infine esistono i trasmettitori termici di portata massica, che misurano la portata dei gas rilevando le variazioni nel trasferimento di calore. Questi dispositivi funzionano riscaldando un elemento nel percorso del flusso e misurando l’effetto di raffreddamento del gas che scorre. La quantità di raffreddamento è direttamente proporzionale alla portata, fornendo una misurazione estremamente accurata. I trasmettitori di portata massica termica sono comunemente utilizzati in settori quali HVAC e controllo di processo, dove la misurazione precisa del flusso di gas è fondamentale.

In conclusione, esistono diversi tipi di trasmettitori di flusso, ciascuno con le sue caratteristiche e applicazioni uniche. La scelta del trasmettitore di flusso dipende dai requisiti specifici dell’applicazione, incluso il tipo di fluido, la precisione richiesta e le condizioni operative. Comprendendo i vari tipi di trasmettitori di flusso, gli operatori possono prendere decisioni informate e garantire prestazioni ottimali nei loro sistemi di misurazione e controllo del flusso.