Perm Porometry porometer | Demcon convergence Convergence Industry B.V.

Specifications

Pore size diameter range circa 1 – 50 nm
Pressureless method and non-destructive
Fits hollow fiber and flat sheet membranes
Plug and play system using pore condensation to measure pore size distribution
Integrated touch screen system
Integrated oven & heating system
Integrated test cell for flat membranes included
Measurement independent of surface-liquid properties such as contact angle

Perm Porometery Porometer

The permporometer porometer measures the pore size distribution of materials using the ‘Kelvin equation’. The Kelvin equation describes the change in vapor pressure due to a curved liquid–vapor interface (pore). The Kelvin equation is dependent upon thermodynamic principles and does not allude to special properties of materials.

POROPERM™ is a permporometer for the measurements of pore sizes in the range between 1 nm and 50 nm at low pressures. It is based on the controlled stepwise evaporation of the liquid blocking the pores (condensable gas) and the simultaneous measurement of the flow rate of an inert gas through the sample, at a constant temperature.

Standard pressure range

Pressure supply required 0-2 bar (29 psi) N2
Actual operating & measurement pressure in the pressure range 1- 100 mbar (1.45 psi)

Membrane cell

The POROPERM™ 1000 comes with a flat sheet membrane cell (total area ~4 cm²). Smaller/larger and special sample holders are available on demand.

Hardware

All flow meters and pressure sensors are digital and are temperature compensated.
3 mass flow controllers (MFC): feed, permeate and crossflow.
Oven: control and readout via software. Maximum temperature 70ºC continuous during measurements.

Software

Advanced service menu facilitates diagnosis and service via Internet.