The Yamato AC-505A is a single-operator anaerobic chamber that automates the purge sequence: press the on-screen "Go Anaerobic" button and the chamber creates and holds an oxygen-free atmosphere without manual valve work. Configured for 110–120 V / 50–60 Hz, it adds a touch-screen controller, continuous oxygen display in percent and ppm, automatic pressure-hold, and 24-hour USB data logging on top of the same 55-inch single-operator chassis as the manual AC-505. It is the choice when reproducible, hands-off atmosphere control matters.
Key Specifications
| Configuration | Single-operator chamber; automatic "Go Anaerobic" purge |
| Oxygen sensor | 0–100.0% ±1.0%; 0–10,000 ppm ±1.0% FS (auto-switches to ppm below 0.5% O2) |
| Temperature range | Ambient to 41 °C, accuracy ±0.5 °C |
| Gas to reach anaerobic | 300 L |
| Pressure range | −3 to +3 in WC (−1500 to +1500 Pa), automatic pressure hold |
| Optional Rh control | 5–90% Rh, accuracy ±1.0% |
| Control / logging | Touch-screen display; on-screen 24-hr data logging via USB; high/low alarms with history; password-protected admin |
| Gas selection | User-selectable nitrogen or anaerobic gas mixture |
| Inside dimensions | 41 × 28 × 26 in / 1041 × 711 × 660 mm |
| Outside dimensions | 55 × 35 × 38 in / 1397 × 889 × 965 mm |
| Power | 110–120 VAC, 50/60 Hz, 5 A |
| Shipping weight | 450 lbs / 205 kg (crated) |
| List price | Contact for pricing |
Application Profile
Where the manual AC-505 asks the operator to run each purge by hand, the Yamato AC-505A turns anaerobic setup into a single button press. The "Go Anaerobic" sequence automatically purges both the main and transfer chambers, then an automatic pressure-hold function keeps the chamber at a user-set level between −3 and +3 in WC. A larger touch screen continuously reports oxygen in percent and, once levels fall below 0.5%, automatically switches to a parts-per-million readout — the resolution needed to confirm a truly anaerobic environment for strict anaerobes and oxygen-sensitive assays.
That automation pays off in reproducibility and record-keeping. On-screen 24-hour data logging with a USB port captures oxygen and pressure history for long-term studies, high- and low-level alarms with a history log flag excursions, and a password-protected administration window locks down settings in shared or regulated labs. Reaching anaerobic conditions consumes roughly 300 L of gas, and an optional relative-humidity monitoring and control package (5–90% Rh) extends the chamber to moisture-sensitive work. The result is a hands-off, auditable atmosphere on the compact single-operator footprint.
Frequently Asked Questions
What does the "Go Anaerobic" button do? It launches an automatic purge sequence that evacuates and inert-gas-fills both the main and transfer chambers, then holds the set pressure — no manual valve operation required.
How precisely can the AC-505A measure oxygen? The oxygen sensor reads 0–100.0% at ±1.0% and 0–10,000 ppm at ±1.0% full scale, and automatically switches to the ppm display once O2 drops below 0.5%.
What voltage does it use? 110–120 V at 50/60 Hz, drawing 5 A. The AC-515A is the equivalent automatic chamber for 220 V service.
Does it log data? Yes — on-screen 24-hour data logging with a USB port for long-term studies, plus high/low alarms with an alarm-history log.
How much gas does it take to reach anaerobic conditions? Approximately 300 L. The user can select nitrogen or an anaerobic gas mixture.
Can it control humidity? Optionally — an Rh monitoring and control package covers 5–90% Rh at ±1.0% accuracy.
Ordering & Configuration
The AC-505A is quote-based capital equipment. Add it to your quote and our team will confirm current pricing, the optional Rh package, gas selection, and lead time. It ships crated as a complete system (~450 lbs); plan for an inert-gas supply at install.
Warranty: Per Yamato standard terms. Safety: Never use in a flammable or explosive gas atmosphere, and never introduce explosive or flammable materials.
Positioning: The Yamato AC-505A is the automatic, touch-screen single-operator anaerobic chamber — choose it over the manual AC-505 when you want one-touch purging, continuous %/ppm oxygen readout, and USB data logging. Pick the AC-515A for 220 V service, or step up to the four-glove AC-706/716 for two-operator throughput.
