ASTM F2892 Standard Visual Field Measurement Device
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The Mask Visual Field Tester is designed to evaluate whether the field of vision under a mask meets standard requirements. It ensures that respirators, protective masks, and daily-use masks provide adequate visibility for safe and effective use. The instrument is widely used for quality control, R&D, and certification testing of mask products.
Standards
The instrument is compliant with the following standards:
(1) GB 2890-2009 – Respiratory protection — Self-priming filter gas mask, Section 6.8: Field of vision
(2) GB 2626-2019 – Respiratory protective products — Self-priming filter anti-particulate respirator, Section 6.10: Field of vision
(3) GB/T 32610-2016 – Technical specifications for daily protective masks, Section 6.12: Field of vision
Features
(1) Hemispherical surface of visual field, including holder, accurately measures left and right vision angles
(2) Standard head mold equipped with electric beads and control switch
(3) Spherical projection of field of vision for precise measurement
(4) Head mold can move left and right to simulate real-life mask usage
(5) Compact and portable design suitable for laboratory or production floor testing
(6) Provides objective verification of visual field compliance for respirators and masks
Technical Parameters
| Item | Specification |
|---|---|
| Perimetry Semicircle Radius | 305 mm |
| Left and Right Field of Vision | ≤120° |
| Pupillary Distance | 62.5 mm |
| Head Mold | Movable left and right |
| Instrument Dimensions | 800 × 500 × 750 mm |
| Weight | 30 kg |
Accessories
(1) Standard head mold with electric bead installation
(2) Field of vision hemispherical surface holder
(3) Control switch module for head mold movement
(4) Power cable
(5) Operation manual
(6) Calibration certificate
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