SHANG ZHUN DM49-60 Mechanical Contact Thickness Gauge
| Brand | SHANG ZHUN |
|---|---|
| Origin | Guangdong, China |
| Model | DM49-60 |
| Measurement Range | 0–2.5 mm / 0–6 mm / 0–12 mm (selectable single range per unit) |
| Resolution | 0.1 µm |
| Accuracy | ±1 µm or ±0.1% of reading (whichever is greater) |
| Parallelism Between Measuring Surfaces | ±0.1 µm |
| Test Speed | 10 tests/min (adjustable) |
| Contact Pressure | 17.5 ± 1 kPa (for films, 0.875 N force) or 100 ± 5 kPa (for paper) |
| Contact Area | 50 mm² (Φ8 mm for films) or 200 mm² (for paper) |
| Power Supply | AC 220 V, 50 Hz, 80 W |
| Dimensions | 461 × 334 × 357 mm (L×W×H) |
| Net Weight | ~32 kg |
| Interface | Color touchscreen, bilingual (Chinese/English), unit switching (mm/mil/µm/inch) |
| Data Output | USB/RS232, PC connectivity, remote control, real-time data transfer |
| Software | Optional SHANG ZHUN Thickness Analysis Suite v49-60-1 |
Overview
The SHANG ZHUN DM49-60 Mechanical Contact Thickness Gauge is a precision metrology instrument engineered for high-reproducibility thickness measurement of planar, flexible sheet materials—including polymer films, foils, coated papers, laminates, and nonwovens. It operates on the fundamental principle of controlled mechanical contact: a calibrated, motorized measuring head descends under programmable actuation onto a stationary sample placed on a rigid anvil surface. The displacement between the two precisely parallel contact surfaces—measured via a high-stability linear variable differential transformer (LVDT) sensor—is converted into thickness with sub-micron resolution. Unlike optical or ultrasonic methods, this contact-based approach eliminates refractive index dependency and surface reflectivity artifacts, delivering traceable, tactile measurements compliant with standardized mechanical compression protocols.
Key Features
- Three factory-configurable measurement ranges (0–2.5 mm, 0–6 mm, or 0–12 mm) — selected at time of order to optimize resolution and mechanical stability for target material classes.
- 0.1 µm resolution and dual-mode accuracy specification: ±1 µm absolute or ±0.1% of reading (whichever dominates), verified across full range using NIST-traceable gauge blocks.
- Automated pressure control system maintains consistent contact force: 17.5 ±1 kPa (0.875 N over 50 mm²) for thin films or 100 ±5 kPa (over 200 mm²) for rigid substrates such as paperboard — conforming to ISO 534 and ASTM D374 loading requirements.
- Thermally stable granite base and hardened steel measuring surfaces ensure long-term parallelism ≤ ±0.1 µm, critical for minimizing edge effects in low-modulus materials.
- 10-test-per-minute throughput with adjustable dwell time and descent speed; programmable test sequence memory supports batch processing of up to 99 samples per session.
- Integrated thermal printer enables immediate hardcopy output of individual readings, statistical summaries (mean, SD, min/max, CV%), and operator ID/time stamps — supporting GLP documentation workflows.
Sample Compatibility & Compliance
The DM49-60 accommodates specimens up to 300 mm × 300 mm in footprint, with thicknesses spanning from 10 µm (e.g., PET carrier film) to 12 mm (e.g., corrugated board liners). Its dual-contact-area configuration (Φ8 mm for films; 200 mm² circular anvil for paper) ensures compliance with standardized footprints mandated by ISO 4593 (plastic film), ISO 3034 (paper and board), ASTM D1777 (textile thickness), TAPPI T411 (paper caliper), and JIS K6250 (rubber sheeting). All mechanical tolerances, pressure calibration, and sensor linearity are validated against ISO/IEC 17025-accredited reference standards. The instrument meets CE marking requirements for electromagnetic compatibility (EN 61326-1) and functional safety (EN 61010-1).
Software & Data Management
The optional SHANG ZHUN Thickness Analysis Suite v49-60-1 provides full PC-based instrument control via USB or RS232 interface. It supports real-time graphing of sequential measurements, automated pass/fail threshold evaluation against user-defined spec limits, and export of raw data in CSV, XLSX, and PDF formats. Audit trail functionality records all parameter changes, calibration events, and user logins — satisfying FDA 21 CFR Part 11 requirements for electronic records when configured with role-based access control and digital signature modules. Data files include embedded metadata: instrument ID, firmware version, environmental timestamp, operator code, and test method identifier.
Applications
This gauge is routinely deployed in QC laboratories for incoming raw material inspection (e.g., BOPP film lot acceptance), in-process monitoring of extrusion and coating lines (e.g., adhesive layer uniformity), and final product release testing for medical packaging (ISO 11607), food-grade laminates (ASTM F1249), and battery separator films (IEC 62660-1). Its mechanical robustness and minimal maintenance profile make it suitable for high-volume production environments where optical interferometers or capacitance gauges may be sensitive to ambient dust, vibration, or electrostatic discharge.
FAQ
Is the DM49-60 suitable for measuring soft elastomeric sheets?
Yes — provided the material recovers fully within the specified dwell time (default 1 s); users may extend dwell duration to accommodate viscoelastic relaxation in silicone or TPU substrates.
Can the instrument store calibration coefficients internally?
Yes — dual-point calibration (zero and span) is stored in non-volatile memory with date/time stamp and operator ID; recalibration intervals follow ISO 9001 internal audit schedules.
Does the built-in printer support label formats for LIMS integration?
The thermal printer outputs fixed-format reports; however, exported CSV files contain all fields required for direct ingestion into common LIMS platforms including LabWare, STARLIMS, and Thermo Fisher SampleManager.
What environmental conditions are recommended for optimal performance?
Operate within 15–25°C ambient temperature, ≤50% RH, and on a vibration-isolated bench; avoid direct sunlight or airflow from HVAC vents to prevent thermal drift in LVDT signal.
Is firmware upgrade supported remotely?
Firmware updates are delivered via encrypted USB key with SHA-256 verification; no network connectivity is required, preserving air-gapped lab security policies.
