532-100
Category:
Soils
Sub Category:
Soil Physics
Product Group:
Pressure plate extractors
Used to determine - available water capacity, water retentivity, hydraulic conductivity and field capacity.
Applications include - soil classification and survey, optimisation of irrigation and drainage, calibration of soil water and measuring apparatus for field use.
The pressure plate is used to determine soil water retention and suctions greater than 0.4 bar. The apparatus consists of strongly built metal chambers containing one or more ceramic plates, on to which uniform soil samples are placed. Having attained maximum moisture retention (field capacity) the samples within the cells are then subjected to controlled positive air pressures and water is gradually removed. By careful control of pressure, the various equilibrium conditions of pressure and soil water tension or suction are obtained.
The air pressure is provided either from a compressor, compressed air bottle or nitrogen bottle. The air pressure source must always be routed via a pressure regulation manifold.
ELE can supply three types of pressure plate extraction systems, which cover the pressure range 0-15 bar.
| Description | 5-Bar Pressure Plate Extractor |
| Capacity | 4 pressure plate cells. (Up to 48 samples) |
| Pressure | 0-5 bar extractor (75psi) |
| Closure | 6 bolts with wing nuts; O-ring seal on lid |
| Support Clips | Stainless steel, adjustable |
| Outflow | 4 tube assemblies with 3 plug bolts; screw into side wall |
| Dimensions | 30cm dia x 22cm deep |
| Weight | 10 kg |
532-104
y porous, inert to most all solutions, possesses hard exterior and interior surfaces, and pure white in colour. Recommended for standard pressure differentials under 1 Bar (14.5 psi). Typical bubbling pressure: 28 - 32 psi. Effective pore size: 2.5 microns. Hydraulic conductivity: 0.0000086 cm/sec. Approximate porosity: 45% by vol. Flow through.
532-106
ately fired ceramic body. Good porosity and good hydrologic flow capability. The material is moderately hard and tannish-white in colour, not recommended for fluid sampling. Recommended for specialised applications where the pressure differentials are under 3 Bars (43.5 psi). Typical bubbling pressure: 46 - 70 psi. Effective pore size: 0.7 microns. Hydraulic conductivity: 0.00000025 cm/sec. Approximate porosity: 34% vol. Flow through.
532-107
o a fired ceramic body. Good porosity and good hydrologic flow capability. The material is very hard and brownish-white in colour, is not recommended for fluid sampling. Recommended for specialised applications where the pressure differentials are under 5 Bar (72.5 psi). Typical bubbling pressure: 80 psi. Effective pore size: 0.5 micron. Hydraulic conductivity: .000000121 cm/sec. Approximate porosity: 31% by vol. Flow through.
532-120
Used to determine - available water capacity, water retentivity, hydraulic conductivity and field capacity. Applications include - soil classification and survey, optimisation of irrigation and drainage, calibration of soil water and measuring apparatus for field use. The pressure plate is used to determine soil water retention and suctions greater than 0.4 bar. The apparatus consists of strongly built metal chambers containing one or more ceramic plates, on to which uniform soil samples are placed. Having attained maximum moisture retention (field capacity) the samples within the cells are then subjected to controlled positive air pressures and water is gradually removed. By careful control of pressure, the various equilibrium conditions of pressure and soil water tension or suction are obtained. The air pressure is provided either from a compressor, compressed air bottle or nitrogen bottle. The air pressure source must always be routed via a pressure regulation manifold. ELE can supply three types of pressure plate extraction systems, which cover the pressure range 0-15 bar.
