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Smart™ Pass-Through with Recirculating HEPA Filtration

Recirculating-Air-Shower-Pass-Through Recirculating-Air-Shower-Pass-Through
Recirculating HEPA-filtered pass-through,
wall-mount model No. 6705-72 (support brackets recommended on opposite side). 
Recirculating HEPA-filtered pass-through,
floor-mount model No. 6705-68
with cart ramps included.
  • Double-walled 304 stainless steel construction creates plenum chambers for recirculating HEPA-filtered air
  • Air return slots along the bottom of the chamber circulate air back through the HEPA filter
  • Speed control knob lets users adjust the blower RPM, increasing the airflow and pressure within the chamber
  • Flush mounting on the "clean" side reduces horizontal surfaces that collect particles
  • HEPA filter removes contaminating particles of 0.3 um or larger at 99.99% efficiency
  • Brushless DC fan motor is clean, quiet and energy-efficient
  • Choose between wall-mount and floor-mount models to fit your workflow
The stainless steel screen in the ceiling can be removed for HEPA filter replacement.  Return vents are positioned along the bottom of the chamber to pull airflow back to the blower.
Air recirculates through a HEPA
filter fan module to remove
sub-micron contaminants

The Recirculating HEPA-Filtration version of the Smart™ Pass-through adds another layer of protection against contamination for materials being transferred.  A blower/filter module emits a continuous, laminar flow of HEPA-filtered air from the ceiling that prevents airborne contamination from reaching senstive materials.

When run continuously, this micro-filtration system sweeps away any particles that may enter the transfer chamber when the doors are opened and maintains an extremely clean pass-through environment.  The blower also slightly pressurizes the chamber, similar to the ISO-classified positive pressure utilized in a cleanroom.  Because the pressurization is minimal, the pressure gauge on the unit measures the backpressure at the filter, which can be used to monitor its efficiency and remaining filter life.

As with all Smart™ Pass-throughs, the status indicator lights confirm that the pass-through is operational and the LED light bar indicates door status: green when both doors closed, red when one door is open and the interlock is engaged. Audible chimes will also sound when a pass-through door is opened, alerting personnel on the other side. The installed Minihelic gauge measures backpressure at the HEPA filter in order to determine when a replacement filter is needed. Wall support brackets are recommended to support chamber weight (order separately).

Also available: Smart™ Pass-Through™ with single-pass ULPA-filtered air shower for surface removal of particles and debris.

Smart™ Pass-Through Chamber with Recirculating HEPA Filtration
Outside Dimensions (mm)
Internal Dimensions (mm)

Power Cat. # Price
31"W x 26"D x 45"H
(787 x 660 x 1143)
24"W x 24"D x 24"H
(610 x 610 x 610)
316 Stainless Steel;
SDPVC Glass window
120VAC, 60 Hz 6705-72-316 $ 14,011
240VAC, 60 Hz 6705-72-316-220 $ 14,011
37"W x 48"D x 72"H
(940 x 1219 x 1829)
30"W x 48"D x 60"H
(762 x 1219 x 1524)
316 Stainless Steel;
SDPVC Glass window
120VAC, 60 Hz 6705-68-316 $ 29,899
240VAC, 60 Hz 6705-68-316-220 $ 29,899
Terra FFU Replacement Filters
Type  Filter Size / Inches; (mm) Aluminum Frame with Andodized Aluminum Face Grille
Cat. # Price
24 x 16 (610 x 406) 6601-40 $ 295

File Type File Name Publication Date
Manual (PDF) Smart Pass-Through™ Chambers: Doc. # 1788-27
This manual contains installation and operating instructions for Terra's Smart Pass-Through chamber line. It also addresses various electronic accessories exclusive to the Smart Pass-Through.
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