Intelligent Fully Automatic 4‑Gang Variable Head Permeameter
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Intelligent Fully Automatic 4‑gang Variable Head PermeameterDescription The BTU-CVP-4 intelligent fully automatic 4-gang variable head permeameter is a laboratory apparatus used to determine the permeability coefficient of sandy soils or soil‑aggregate mixtures. It features a 4-gang structure allowing simultaneous variable head permeability tests on four soil specimens. The instrument includes a built‑in multi‑channel data acquisition unit and dedicated post-processing software for automated data collection and analysis. Test Standards l ASTM D2434(Standard test method for permeability of granular soils) l ASTM D5084(Standard test methods for measurement of hydraulic conductivity of soils using variable head) l ISO 17892-11(Geotechnical laboratory testing- Determination of permeability) l GB/T 50123-2019(Standard for geotechnical testing method- Variable head permeability section) Specification
Detail l Permeability cell: Includes cell, cell base, upper pressure piston, fixing bracket, etc. l Anti-particle loss design: The base is equipped with a 3-way 2-position ball valve and a hand‑tightened reaction device to prevent loss of coarse particles during testing. l Water supply system: A micro pump automatically fills the 2 L water tank to maintain a stable head. l Water level measuring panel: Two sets of acrylic water level tubes (20 mm diameter) allow clear reading of head height (0-600 mm). l Automated data acquisition: Built-in multi-channel acquisition unit simultaneously records permeability data from 4 channels, reducing manual errors. l Post-processing software: Dedicated software for data management, permeability coefficient calculation, and report generation. Application
Advantages l 4-gang high efficiency: Tests up to 4 specimens simultaneously, greatly improving testing throughput – ideal for batch testing. l Suitable for coarse-grained soils: Specifically designed for sandy soils and mixtures, overcoming clogging or particle loss issues common in conventional permeameters. l High-precision head measurement: 1 mm resolution, ±0.3% FS accuracy ensures reliable data. l Highly automated: Built‑in acquisition unit + software for real‑time head monitoring and automatic k‑value calculation. l Anti-loss design: Hand-tightened reaction device and 3‑way ball valve effectively prevent fine particles from being washed away. l Large specimen size: Φ100mm* 100mm specimen provides a more representative sample for coarse‑grained soils. What To Choose
Process Flow l Specimen preparation: Prepare a Φ100mm × 100mm sandy soil or mixture specimen according to standard procedures. l Specimen installation: Place the specimen into the permeability cell, ensuring a good seal with no side leakage. l System connection: Connect the water level tubes, water supply tank, 3‑way valve, and data acquisition unit. l Saturation and degassing: Saturate the specimen using the water supply system and remove air bubbles from the lines. l Set initial head: Set the initial water head height (within 0–600 mm range). l Start test: Activate the pump to maintain head; the acquisition unit automatically records water level vs. time for all 4 channels. l Calculate permeability coefficient: The software automatically computes the permeability coefficient for each specimen using the variable head formula. l Generate report: Produce a test report including head‑time curves and permeability coefficient results.
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