INSTRUMENTA O INDUSTRIAL

INSTITUTO FEDERAL DE EDUCAÇÃO, CIÊNCIA E TECNOLOGIA DO RIO DE JANEIRO

CAMPUS SÃO GONÇALO

INSTRUMENTAÇÃO INDUSTRIAL

CONDUTIVÍMETROS E ELETRODOS

BRISSA ROCHA
ISABELE RODRIGUES
JULIANA RAMOS
PAOLA ANDRADE
VITÓRIA PINA

1

SUMÁRIO

1.

CONDUTIVÍMETROS­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­03

1.1INTRODUÇÃO­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­03
1.2 UNIDADES E ORDENS DE GRANDEZA­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­ 03
1.3 A VARIAÇÃO DA CONDUTIVIDADE COM A TEMPERATURA­­­­­­­­­­­­­­­­04 1.4 A VARIAÇÃO DA CONDUTIVIDADE COM O pH­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­04
1.5 APLICAÇÕES­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­05
1.6 OS INSTRUMENTOS­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­ 06
1.7 MONTAGEM DAS CÉLULAS NO PROCESSO­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­07 1.8 CALIBRAÇÃO ­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­08 1.9 LEITURAS EM RESISTIVIDADE­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­09 2. ELETRODOS­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­09 2.1 MEDIÇÃO­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­09
2.2

CARACTERÍSTICAS INERENTES AOS ELETRODOS DE

MEDIÇÃO­­­­­­10 2.2.1 ­ ELETRODOS DE ANTIMÔNIO­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­10 2.2.2 ­ O I.S.F.E.T­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­11 2.3 CARACTERÍSTICAS INERENTES AOS ELETRODOS DE REFERÊNCIA­11 2.4 ­ ELETRODOS COMBINADOS INDUSTRIAIS­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­11 2.5 ANALISADORES DE pH­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­12
2.5.1 SISTEMAS DE