- Polypropylene construction provides excellent chemical resistance
- Smart control system modulates blower speed to maintain constant air velocity past the operator as a function of sash height
- Activated charcoal filters remove organic fumes for safe indoor release
- Hydrocarbon sensor detects breakthrough of fumes through charcoal filter
- Audible and visible alarms indicate unsafe operating conditions: low entrance air velocity, carbon filter breakthrough, excessive backpresure accross HEPA filter
- Baffle system optimizes fume ventilation, can be removed for easy cleaning
- Differential pressure gauge monitors HEPA pre/post filters to ensure clean conditions, inside and out
- Provides spacious working area yet fits through standard doorway
- Options include service utilities and monitoring of relative humidity, temperature, pH
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Front Access to Filters —
Quick-release holders securely position HEPA and 1 – 3 charcoal filters |
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| Full-width ergonomic air foil: minimizes turbulence and provides a comfortable, flexible arm rest (elevated arm rest available) |
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| Baffle system optimizes non-turbulent flow away from operator |
Terra’s SmartHood™ Ductless Fume Hood ventilates and removes organic vapors released inside the hood to allow safe recirculation of exhaust into the room.
Polypropylene construction offers excellent chemical resistance, and a 1" front lip provides a safe spill containment area. The airflow baffling system minimizes airflow turbulence that could result in backflow toward an operator or retain fumes inside the hood. The onboard fan module draws fumes safely toward the rear of the containment area and directs them into activated carbon filters, which remove chemical fumes from the exhaust flow. Terra’s bonded charcoal filters minimize particle sloughing and eliminate voids that can allow chemical bypass of the charcoal media.
HEPA filters may be installed inside the hood to remove submicron particles, including aerosols that cling to dust. An external HEPA filter module is also available for final filtration, allowing air recirculation into a cleanroom environment.
Smart Controller Maintains Constant Air Velocity
The SmartHood controller automatically modulates the fan speed to maintain a constant airflow velocity (typically, 100 feet/minute) past the operator as the sash height or HEPA filter backpressure changes. The measured air velocity is displayed on the LCD readout. The constant velocity set point, programmable on the touchpad control, helps meet provisions of ASHRAE 110-95 test protocol.
The controller also provides several audible and visible safety alarms:
- Airspeed alarm: Alarms signal if measured air speed past the operator falls below set point value (typically 100 ft./minute).
- Charcoal filter breakthrough: A hydrocarbon sensor monitors integrity of the charcoal filter. When “breakthrough” is detected, the controller issues a warning alert to change the filter.
- HEPA backpressure alarm: When pressure differential exceeds a programmable limit, the controller issues an alert to indicate the need to replace the HEPA filter(s).
- Elapsed time alarm: Based on predicted filter lifetime, a timer can be used to signal the need for filter replacement before “breakthrough.” Secondary timers can be programmed to issue elapsed-time alerts for process operations.
- Process alerts: When probes for monitoring relative humidity, pH and temperature are installed, alarms can be programmed to indicate that specified process limits are exceeded.
The SmartHood includes a fluorescent light, mounted externally, and a 12"-dia. x 2"H exhaust flange mounted at the top rear of the unit. |
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