ZiQi ZF-1 Desktop Tri-Wavelength UV Transilluminator

Overview

The ZiQi ZF-1 Desktop Tri-Wavelength UV Transilluminator is a purpose-engineered benchtop instrument designed for safe, reliable, and routine fluorescence visualization in life science laboratories. It operates on the principle of ultraviolet-induced fluorescence—exciting endogenous or dye-labeled biomolecules (e.g., ethidium bromide-, SYBR®-stained DNA/RNA, or fluorescein-conjugated proteins) at discrete wavelengths to enable real-time detection and qualitative assessment without requiring imaging hardware. Unlike gel documentation systems, the ZF-1 serves as a dedicated transilluminator with independent control of short-wave (254 nm), long-wave (365 nm), and visible-light illumination—enabling simultaneous comparative analysis across excitation conditions. Its compact ABS housing ensures mechanical stability and electrical insulation, while its low-power UV lamp configuration (6 W per channel) minimizes ozone generation and thermal load during extended use—critical for maintaining gel integrity and operator safety.

Key Features

• Benchtop tri-wavelength operation: Independent toggle switches for 254 nm (short-wave UV), 365 nm (long-wave UV), and broadband visible light (400–700 nm), enabling flexible excitation selection without cross-contamination of optical paths.
• Dedicated transillumination surface: Uniform 200 × 50 mm active area defined by high-transmission UV filter glass, optimized for standard electrophoresis mini-gels (e.g., 8 × 10 cm formats) and thin-layer chromatography (TLC) plates.
• Low-ozone, low-heat UV source: Dual 6 W UV lamps engineered for stable output over time; no forced-air cooling required, reducing vibration-induced image blur during manual gel documentation.
• Operator-safety oriented design: Integrated UV-blocking acrylic shield (standard configuration); lamp housings fully enclosed to prevent direct line-of-sight exposure; compliance with IEC 62471 Photobiological Safety classification for UV-A/UV-C emission limits.
• Robust mechanical construction: Injection-molded ABS chassis provides ESD-safe grounding, chemical resistance to common lab solvents (e.g., ethanol, isopropanol), and structural rigidity under repeated sample loading.

Sample Compatibility & Compliance

The ZF-1 supports visualization of nucleic acids stained with intercalating dyes (e.g., ethidium bromide, GelRed™, SYBR® Safe), fluorescently labeled proteins, TLC-separated metabolites, and naturally fluorescent compounds (e.g., aflatoxins, riboflavin, chlorophyll). It is routinely employed in workflows aligned with ISO 16140 (validation of alternative microbiological methods), USP (fluorescence assay validation), and CLSI EP17-A2 (detection limit verification). While not a regulated medical device, its optical performance meets baseline requirements for GLP-compliant documentation in QC labs performing qualitative gel-based assays per ASTM D7793 (fluorescent additive screening in food packaging) and AOAC Official Method 2005.02 (aflatoxin B1 detection in grains).

Software & Data Management

As a standalone transilluminator, the ZF-1 does not incorporate embedded firmware or digital connectivity. It functions as an analog optical platform compatible with external documentation systems—including DSLR cameras (with UV-pass filters), smartphone adapters, and commercial gel imagers (e.g., Bio-Rad ChemiDoc™, Thermo Fisher iBright™). For audit-trail compliance in regulated environments, users integrate the ZF-1 into documented SOPs specifying lamp warm-up duration (≥2 min), exposure time ranges (5–60 s), and visual inspection criteria. Its lack of network interfaces inherently satisfies air-gapped operational requirements under FDA 21 CFR Part 11 when used solely for observation—not data acquisition.

Applications

• Molecular biology: Rapid post-electrophoresis visualization of DNA/RNA fragments, PCR product verification, restriction digest analysis, and plasmid screening.
• Pharmaceutical QC: Thin-layer chromatography (TLC) spot identification for active pharmaceutical ingredients (APIs), degradation product tracking, and excipient fluorescence profiling.
• Food safety testing: Qualitative detection of aflatoxin contamination in cereals and nuts, fluorescent whitening agents in flour, and adulterants in edible oils and dairy products.
• Forensic science: Latent fingerprint development using cyanoacrylate fuming followed by UV excitation, and document authenticity verification via ink fluorescence differentiation.
• Materials science: Assessment of polymer photostability, identification of fluorescent pigments in textiles, and mineralogical screening in geological samples.

FAQ

Is the ZF-1 suitable for quantitative densitometry?
No—the ZF-1 is a qualitative transilluminator. Quantitative band intensity analysis requires calibrated CCD-based imaging systems with linear response curves and background subtraction algorithms.
Can I use it with SYBR® Gold stain?
Yes—SYBR® Gold exhibits strong excitation maxima near 300 nm and 495 nm; optimal visualization occurs under 365 nm illumination, though 254 nm may be used for higher sensitivity at the expense of increased DNA damage.
Does it comply with CE or UL safety standards?
The ZF-1 meets general electrical safety requirements per IEC 61010-1 (Edition 3.1) for laboratory equipment; CE marking is available upon request for EU-distributed units meeting RoHS 2011/65/EU directives.
How often should the UV filter glass be cleaned?
Wipe gently with lint-free lens tissue and reagent-grade isopropanol after each use; avoid abrasive cleaners or pressure that may scratch the coated surface—optical transmission degrades irreversibly if scratched.
What is the expected lifetime of the UV lamps?
Rated for ≥2,000 hours of cumulative operation under nominal voltage; output intensity declines gradually—lamps should be replaced when observed fluorescence signal falls below 70% of initial brightness under standardized test conditions.