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The HM-HZ3 is the flagship model in the HM Instruments haze meter lineup, engineered for applications that demand both measurement versatility and precision. Its standout feature is the dual aperture system — a 21mm port for standard flat samples and a 7mm port for small, curved, or edge-zone specimens that cannot be properly seated on a single-aperture instrument. Combined with dual-standard haze calculation (ASTM D1003 and BS ISO 14782), 0.05 repeatability, and 0.01 resolution, the HM-HZ3 handles the full spectrum of transparent material testing — from architectural glass edge zones to OLED display cover glass and optical lenses. For labs that need dual-standard capability but work exclusively with standard flat samples, the HM-HZ2 offers the same standards compliance at a lower price. For ASTM-only routine needs, see the HM-HZ1.
Applications
- Architectural and automotive glass — flat center zones and curved edge regions
- OLED and LCD display cover glass with anti-glare coating verification
- Optical lens and prism haze inspection for LED lighting and imaging systems
- Small-diameter transparent tubing and medical catheter quality testing
- Coating R&D requiring highest resolution (0.01) for formulation comparison
- Chemical solution clarity assessment with optional cuvette fixture
Functional Performance
- Dual aperture (21mm + 7mm) — unique versatility for diverse sample geometries
- Highest repeatability in series (0.05) for precision-critical applications
- Dual-standard haze calculation (ASTM + ISO) for global report acceptance
- 7-inch IPS capacitive touchscreen with Chinese/English switching
- LED light source (CIE C illuminant) — instant-on, 5-year lifespan
- 0/d optical geometry with CIE Y/V(λ) human-eye-response detector
- 20,000 data set storage with USB export and multi-sample comparison view
- WiFi for remote firmware updates and automatic time synchronization
- Multi-level user permission management for GLP/GMP compliance
- Optional cuvette test fixture ($150) for liquid sample measurement
- Open measurement area (150mm) supporting vertical and horizontal postures
- DC 12V/3A low-voltage operation, ≤5.5 KG, compact footprint
Main Parameters
| Parameter | Value |
|---|---|
| Model | HM-HZ3 |
| Aperture | 21mm + 7mm (dual) |
| Haze Standards | ASTM + ISO |
| Repeatability | 0.05 |
| Resolution | 0.01 |
| Measurement Range | Transmittance 0–100%; Haze 0–100% |
Technical Parameters
| Parameter | Value |
|---|---|
| Operation | 7-inch touchscreen |
| Light Source | LED calibrated to C illuminant (380nm–780nm) |
| Standards | GB/T 2410-2008, ASTM D1003-07, BS ISO 14782-2021 |
| Optical Structure | 0/D |
| Spectral Response | CIE Y/V(λ) |
| Aperture | 21mm, 7mm |
| Repeatability | 0.05 |
| Resolution | 0.01 |
| Haze Data | ASTM, ISO |
| Data Interface | USB |
| Language | Chinese/English switching |
| Temperature | (5–40)°C |
| Humidity | ≤85%RH |
| Power | DC 12V/3A |
| Dimensions | 470mm × 270mm × 170mm |
| Sample Chamber Height | 150mm (open) |
| Weight | ≤5.5 KG |
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