| Cable Ports | Cable ports: 2", 4", or 6" diameter (50, 100, or 150mm). One 2" port is standard on the left wall. |
| Cart | Roll-around cart with storage cabinet (suitable for chart recorder placement) |
| Chart Recorder | Honeywell circular-chart recorders |
| Control sensor output | Control sensor output for customer use |
| Emergency Stop | Emergency stop 'mushroom' button |
| Ethernet | Ethernet access for F4 |
| Ext. water supply tank | External water supply tank with recirculating capability |
| Extended Low Humidity | Extended low humidity range to 5°C/15% (see chart, page 7) |
| Liquid Nitrogen | Liquid nitrogen (LN2 ) injection boost for faster cooling |
| Overcool Protector | Overcool protector (overheat is standard) |
| Paperless Recorder | Yokogawa paperless recorders with optional Ethernet |
| RS-485 | RS-485 interface (in place of RS-232C) |
| Shelf | Adjustable stainless-steel shelving |
| Solid-state humidity sensor | Solid-state humidity sensor in place of wet-bulb |
| Strip Recorder | Yokogawa strip-chart recorders |
| Water Filter | Water filter (de-ionizing type) |
| WatView Upgrade | WatView software upgrade for full data-logging capability |
| Window | Heated viewing window, 6"x6" (150x150mm) with interior light |