SPECIFIC SCALES ON IDP FOR AIR:Measuring tube must be in PolysulfonGraduated scales: HCl 30 – 33%: Measuring tube may be in PVC or Polysulfon
Graduated scales: NaOH 30%:Measuring tube must be in PolysulfonGraduated scales: NaOH 50%: Measuring tube must be in Polysulfon