Jingcheng Huatai HTY-203 Fixed-Depth Sediment Corer
| Brand | Jingcheng Huatai |
|---|---|
| Origin | Beijing, China |
| Manufacturer Type | Authorized Distributor |
| Country of Origin | China |
| Model | HTY-203 |
| Sampling Depth | 10 m |
| Core Diameter | 5 cm |
| Core Length | 30 cm |
| Configuration | T-handle, 9 × 100 cm extension rods, 2 × 50 cm extension rods, fixed-depth peat coring bit, scraper, 2 wrenches, brush, 3 m steel tape measure, gloves, aluminum carrying case |
Overview
The Jingcheng Huatai HTY-203 Fixed-Depth Sediment Corer is a manually operated, mechanically triggered soil sampling instrument engineered for stratified retrieval of soft, unconsolidated sediments—including peat, marsh soils, and waterlogged organic deposits—without cross-contamination from overlying layers. It operates on the principle of depth-restricted core capture: a spring-loaded or cam-actuated closure mechanism engages at a pre-determined insertion depth, sealing the sample tube only after reaching the target stratum. This design eliminates reliance on continuous core barrel advancement or vacuum-based retention, making it particularly robust in environments where borehole wall collapse, lateral smearing, or sediment extrusion compromise conventional push or percussion corers. The HTY-203 is not intended for lithified or highly compacted substrates; its performance envelope is defined by low shear strength (<20 kPa), high moisture content (>70% w/w), and plasticity indices typical of wetland and intertidal zone deposits.
Key Features
- Fixed-depth mechanical triggering: A calibrated rotation (180°) of the T-handle actuates a cam-driven inner sleeve that closes the lower sampling orifice precisely at user-defined depth intervals—enabling discrete, non-overlapping stratigraphic sampling.
- Modular rod system: Includes nine 100 cm and two 50 cm stainless steel extension rods with threaded couplings, allowing incremental depth adjustment up to 10 m while maintaining torsional rigidity and minimizing flex-induced misalignment.
- 5 cm internal diameter coring bit: Optimized for high recovery ratio in saturated organic matrices; inner tube geometry minimizes wall friction and facilitates clean extrusion using the integrated scraper tool.
- Corrosion-resistant construction: All critical components—including the coring bit, inner liner, and handle assembly—are fabricated from marine-grade stainless steel (AISI 316) to ensure long-term integrity in saline, sulfidic, or acidic field conditions.
- Field-deployable calibration reference: Each unit includes a 3 m steel tape measure with mm-scale graduations, enabling real-time verification of insertion depth against surface datum—critical for compliance with ISO 18400-101 (soil sampling — Part 101: Guidance on planning) and ASTM D1586 (standard test method for penetration resistance and classification of soils).
Sample Compatibility & Compliance
The HTY-203 is validated for use with Class I–III soils per ISO 14688-1 (identification and classification of soils), specifically targeting fine-grained, high-organic-content materials exhibiting liquidity indices >1.0 and Atterberg limits consistent with USCS classification SP-SM, PT, and OH. It complies with field sampling protocols required under EPA Method 5035A (sampling of solid waste for volatile organic analysis) when used in conjunction with appropriate chain-of-custody documentation and cold-chain transport. While not certified to GLP or ISO/IEC 17025 laboratory accreditation standards (as it is a field collection device), its mechanical repeatability supports traceable depth assignment per EN ISO 22030:2021 (soil quality — sampling — guidance on quality assurance of sampling processes).
Software & Data Management
The HTY-203 is a standalone mechanical instrument with no embedded electronics, firmware, or digital interface. All operational data—including insertion depth, rotational torque feedback, core recovery length, and visual stratigraphy notes—are recorded manually using standardized field log sheets aligned with ISO 18400-201 (soil sampling — Part 201: Documentation). Users are advised to integrate field records into LIMS platforms via structured CSV import templates compatible with common environmental data management systems (e.g., EQuIS, GeoVision, or ArcGIS Field Maps). No proprietary software, cloud connectivity, or FDA 21 CFR Part 11-compliant audit trail is provided or required.
Applications
- Wetland biogeochemical profiling: Retrieval of intact peat columns for radiocarbon dating (¹⁴C), stable isotope analysis (δ¹³C, δ¹⁵N), and porewater chemistry without compaction-induced fluid migration.
- Tidal flat and salt marsh monitoring: Stratified sampling across redox gradients for heavy metal speciation (e.g., As, Hg, Pb) and microbial community DNA extraction.
- Baseline environmental site assessment (ESA): Collection of undisturbed samples from depths 60–90 cm below marsh surface—common regulatory screening interval for legacy pesticide residues (e.g., DDT, chlordane) under ASTM E1527-21.
- Carbon stock quantification: High-fidelity organic matter preservation supports bulk density and loss-on-ignition (LOI) measurements per IPCC Wetlands Supplement guidelines.
- Ecological restoration pre-audit: Establishing pre-intervention sediment composition prior to hydrological reconnection or vegetation reintroduction projects.
FAQ
What soil types are compatible with the HTY-203?
The corer is optimized for saturated, low-density organic sediments—primarily peat, marsh soils, and waterlogged silt-clay mixtures—with undrained shear strength below 20 kPa. It is not suitable for gravelly, rocky, or desiccated mineral soils.
Can the HTY-203 be used in submerged conditions (e.g., shallow water)?
Yes—its sealed rod couplings and corrosion-resistant materials permit operation in standing water up to 1.5 m depth; however, operator stability and depth control require auxiliary flotation or platform support.
Is the 30 cm core length adjustable?
The standard inner liner is fixed at 30 cm, but custom-length liners (20–50 cm) can be ordered separately; all retain identical 5 cm internal diameter and closure kinematics.
Does the HTY-203 meet ASTM or ISO requirements for representative sampling?
It satisfies the mechanical reliability criteria outlined in ISO 18400-101 Annex B and ASTM D1586 Section 7.2 for manual coring devices used in soft soils, provided operators follow documented depth calibration and handling procedures.
How is sample integrity maintained during extraction?
The cam-actuated closure prevents upward displacement of the target layer during withdrawal; subsequent extrusion using the included scraper ensures minimal disturbance to vertical structure and moisture distribution.
