Tongxintianbo TX-350 Grain Moisture Analyzer

Overview

The Tongxintianbo TX-350 Grain Moisture Analyzer is a portable, microprocessor-controlled instrument engineered for rapid and reliable moisture quantification in bulk agricultural commodities. It operates on the principle of electrical capacitance and conductance measurement — a well-established, non-destructive method for estimating water content in hygroscopic granular materials. Unlike oven-drying reference methods (e.g., AOAC 950.46 or ISO 712), which require sample preparation, thermal treatment, and extended waiting periods, the TX-350 delivers real-time results within 10 seconds using a calibrated dielectric response algorithm. Its design targets routine quality control in grain receiving stations, feed mills, storage facilities, and field inspection units where speed, portability, and operational simplicity are critical. The analyzer integrates an internal load cell for simultaneous mass determination, enabling direct moisture calculation as mass percent (w/w) without manual tare steps.

Key Features

• High-speed analysis: Full moisture readout in ≤10 seconds per sample, supporting throughput of >300 tests per day under continuous operation.
• Dual power architecture: Operates seamlessly on AC adapter (100–240 V, 50/60 Hz) or rechargeable Li-ion battery (up to 8 hours runtime), ensuring uninterrupted use in off-grid silos or mobile inspection vans.
• Intelligent environmental compensation: Real-time temperature and ambient humidity sensing enables dynamic correction of dielectric signal drift, improving consistency across seasonal and geographic variations.
• Multi-point calibration support: Users may configure up to five custom calibration curves — each tied to specific grain types (e.g., paddy rice, hard red winter wheat, dent corn, soybean, rapeseed) — stored in non-volatile memory with timestamped versioning.
• Integrated mass measurement: Built-in 0.01 g resolution load cell eliminates external balance dependency and reduces operator-induced error during sample loading.
• Energy-efficient display: High-contrast monochrome LCD with adjustable backlight; auto-dimming and programmable sleep mode extend battery life without compromising readability in low-light environments.

Sample Compatibility & Compliance

The TX-350 is validated for use with intact, unground kernels of cereal grains and oilseeds meeting standard size and density specifications per ISO 712:2017 Annex A. Compatible matrices include but are not limited to Oryza sativa (paddy and milled rice), Triticum aestivum (wheat), Zea mays (corn), Glycine max (soybean), and Brassica napus (rapeseed). Sample volume is standardized at 100–150 mL (approx. 120–180 g depending on bulk density), loaded directly into the removable stainless-steel sample cup. While not intended for powdered or pelleted feed formulations, optional cup inserts (sold separately) allow adaptation for smaller-seeded crops such as barley or oats. The device complies with IEC 61000-4-2 (ESD immunity) and IEC 61000-4-3 (radiated RF immunity) standards. Its firmware architecture supports audit-ready operation under GLP and GMP-aligned workflows, including user-accessible calibration logs, measurement history export (CSV via USB-C), and password-protected parameter modification.

Software & Data Management

Data handling is managed through embedded firmware v3.2+, supporting local storage of up to 2,000 test records with metadata (date/time, operator ID, grain type, calibration ID, ambient temperature). Export is enabled via USB-C interface to standard FAT32-formatted drives; no proprietary software installation is required. Each record includes raw capacitance/conductance values, compensated moisture %, and confidence flagging based on signal-to-noise ratio thresholds. Optional PC-based Desktop Manager (v2.1) provides advanced functions: statistical process control (SPC) charting, batch-level moisture variance reporting, trend analysis across harvest seasons, and PDF certificate generation compliant with ISO/IEC 17025 documentation requirements. All data transfers adhere to FDA 21 CFR Part 11 principles — electronic signatures, audit trails, and role-based access control are enforced when used with the Desktop Manager.

Applications

• Grain procurement: Rapid verification of moisture compliance against contractual limits (e.g., ≤14.0% for U.S. No. 2 yellow corn per USDA FGIS standards).
• Storage management: Monitoring moisture migration in static bins to prevent mold proliferation and mycotoxin formation (critical below 13.5% for long-term safe storage).
• Processing line control: Inline spot-checking prior to drying, milling, or extrusion to avoid thermal degradation or equipment clogging.
• Research & extension services: Field-deployable assessment tool for agronomists evaluating hybrid performance under variable irrigation regimes.
• Export documentation: Generating traceable moisture reports for phytosanitary certificates and international trade compliance (e.g., EU Regulation (EC) No 852/2004).

FAQ

What reference method is recommended for periodic verification of TX-350 accuracy?
AOAC Official Method 950.46 (Loss-on-Drying) or ISO 712:2017 should be used with triplicate oven-dried samples from the same lot tested on the TX-350.
Does the TX-350 require annual recalibration by the manufacturer?
No — end users may perform full calibration using NIST-traceable moisture standards (e.g., certified grain reference materials from USDA ARS or IRMM); factory recalibration is only advised after physical impact or sensor replacement.
Can the TX-350 measure moisture in frozen or chilled grain?
No — samples must be equilibrated to ambient temperature (15–30 °C) prior to testing; condensation or surface frost invalidates dielectric readings.
Is bulk density conversion applicable to all grain types?
Conversion algorithms are preloaded for 12 major commodities; custom density coefficients may be entered manually for regional varieties or experimental cultivars.
How is measurement uncertainty reported in exported data files?
Each CSV record includes “Uncertainty_95%” column derived from repeatability studies per ISO/IEC 17025 Clause 7.6.3, reflecting combined standard uncertainty at k=2.