| 摘要 |
Apparatus for testing a fluid comprises a flow conduit 10, a probe 15 having an inlet opening 32 which is disposed in a circular cross-section portion 16 of the probe 15 and which communicates with an outlet opening 35 which is disposed in a non-circular cross-section portion 17 of the probe 15, the latter portion 17 being such that the points at which boundary layer separation occurs are not substantially affected by variations in the fluid flow rate turbulent intensity or by the characteristics of the fluid, the probe 15 being provided, between the said circular and non- circular cross-section portions 16, 17 with a flange or plate 18 and measuring means 41, 42. Flow rate is measured using electrically heated thermisters or Pt resistance thermometers. Other parameters such as density, temperature, pH, conductivity and oxygen content may be measured. <IMAGE> |
