Description
Overview
The intelligent ductless filtered safety cabinet is a self-contained containment system: a sealed, negative-pressure enclosure whose dual-layer activated carbon beds adsorb the chemical load from the air and return it purified to the room. No ductwork, no exhaust fan, no roof penetration — placement and a 220V socket are the entire installation.
The monitoring is what makes it intelligent. Two VOC probes — one watching the exhaust path, one watching room air — feed the 7-inch touchscreen, which runs temperature, humidity, fan state and filter status with integrated alarms. The saturation alarm fires on your threshold, before breakthrough, and the controller logs the exposure history for audit. The fan adjusts its speed to hold negative pressure as the filters load.
The molecular filtration is documented against a published compatibility chart: 500+ common laboratory chemicals adsorbed on activated and impregnated media, with modular bays configured for liquids, dusts or mixed loads. The same cabinet protects the weighing and stores the chemicals — monitored, duct-free, relocatable.
Key features
- Dual-layer carbon filtration. bulk-load bed plus polish stage, with impregnated media for acid gas, ammonia and formaldehyde classes
- Dual VOC probes. exhaust breakthrough and room air monitored continuously on the 7-inch touchscreen
- Filter saturation alarm. user-set thresholds fire before breakthrough, with logged exposure history
- Negative pressure containment. fan-speed control holds the differential as filters load — nothing leaves unfiltered
- 500+ chemicals adsorbed. documented against the published compatibility chart; modular bays for liquid, dust and mixed loads
- ≥1.2mm steel body, 6mm acrylic panels. epoxy powder coated body with full-visibility acrylic front and sides
- JG/T 385-2012 compliant. face velocity 0.4-0.6 m/s at 235-690 m³/h by model; PSC fan at 39-40 dBA
Specifications
| Model | Intelligent ductless filtered safety cabinet (DNJQ series) |
|---|---|
| Widths | 800 / 1000 / 1275 / 1600mm (benchtop and floor-standing models) |
| Body | ≥1.2mm steel, epoxy powder coated, chemical-resistant finish |
| Front and side panels | ≥6mm acrylic, transparent |
| Display | 7-inch LCD touchscreen |
| Monitoring | Temperature, humidity, dual VOC concentration, fan state, filter status |
| Alarms | Filter saturation (user-set) · fan failure · setpoint deviation |
| Filtration | Dual-layer activated carbon + HEPA; modular liquid / dust / mixed configurations |
| Air handling | 235-690 m³/h by model; face velocity 0.4-0.6 m/s |
| Fan | PSC, 24-hour duty, 39-40 dBA, 82-218W |
| Power | 220-240V, 50-60Hz |
| Compliance | JG/T 385-2012 · UL 1805 (ductless listing practice) |
Where you would install it
- Chemical weighing. hazardous inventory weighed under monitored, filtered capture
- Chemical storage. bottles held under continuous negative-pressure filtration
- Sample preparation. solvent and reagent prep in interior rooms without ductwork
- Histology and pathology. staining and drying steps with odour and vapour control
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