The Yamato SM-311 is an automatic high-pressure steam sterilizer with a drying stage (SM310 class), running a microprocessor-controlled STERILIZE or STERILIZE & DRY cycle in a 36 L (1.2 cu ft) chamber on 220V supply. Sterilization runs 105–128 °C at up to 0.2 MPa (29.0 psi), followed by a hot-air dry to 150–180 °C. The 115V sibling is the SM-301.
Key Specifications
| SKU | SM-311 |
| Base model | Yamato SM310 |
| System | Automatic high-pressure steam sterilizer with dryer |
| Sterilization temperature range | 105–128 °C |
| Drying temperature range | 150–180 °C |
| Max. operating pressure | 0.2 MPa (29.0 psi) |
| Controller | Hi Tec IV CR microprocessor type |
| Sensor 1 (chamber temp.) | Pt100Ω resistance thermometer |
| Sensor 2 (water temp.) | Type-T thermocouple |
| Timer | 1 min – 99 h 59 min / 100–999 h |
| Heater 1 (sterilize) | 2.0 kW |
| Heater 2 (dry) | 1.5 kW |
| Chamber (dia. × depth) | 30 cm × 44.5 cm |
| Chamber capacity | 36 L (1.2 cu ft) |
| External dimensions (W×D×H) | 44 × 53 × 96.5 cm |
| Weight | 80 kg (176.4 lb) |
| Water requirement | 2800–3000 mL (distilled water) |
| Safety | Main short-circuit protection, safety-valve overpressure relief, self-diagnostic sensor monitoring, low-water sensor, SSR/heater protection |
| Power supply | AC220V, 11 A (50/60 Hz) |
Application Profile
Steam sterilization works because saturated steam under pressure carries far more heat than dry air, denaturing proteins and killing spores at practical temperatures. The SM-311 automates the whole cycle (air purge, pressurization, timed hold at setpoint, then cooling) with an optional drying stage so loads emerge sterile and dry.
The 36 L chamber and 220V, 2.0 kW sterilize heater make the SM-311 the 220V counterpart to the 115V SM-301, suited to higher-throughput benchtop work: larger media batches, more glassware, mixed instrument loads. Its 128 °C / 0.2 MPa ceiling shortens dense-load cycles. Always run with the basket in place, fill with distilled water (2800–3000 mL) to prevent scale and corrosion, and verify each run with a chemical indicator. The self-diagnostic controller and low-water sensor prevent dry-firing; the safety valve relieves overpressure. Never process flammable or explosive materials.
Frequently Asked Questions
What temperature and pressure does it reach? Sterilization runs 105–128 °C at up to 0.2 MPa (29.0 psi); the drying stage reaches 150–180 °C.
How large is the chamber? 36 L (1.2 cu ft): 30 cm diameter × 44.5 cm deep.
How much water does it need? 2800–3000 mL of distilled water; a low-water sensor halts operation if the level is too low.
Does it dry loads? Yes. A STERILIZE & DRY cycle uses a separate 1.5 kW dryer heater to remove residual moisture.
How does it compare to the SM-511? The SM-311 has a 36 L chamber; the SM-511 offers 51 L in the same 220V class for larger loads. Both reach 105–128 °C at 0.2 MPa.
Which voltage is this? This is the 220V model (AC220V, 11 A); the 115V counterpart is SM-301.
Ordering & Configuration
Confirm at quote: supply voltage, chamber size versus your typical load, and siting (ventilation and clearance for the lid and steam exhaust).
Warranty: Per Yamato standard capital-equipment terms. Confirm coverage at quote.
Add to a quote to lock voltage and lead time; the SM-311 ships with a water bottle, two baskets, a bottom plate, a steam receiver (saucer), the manual, and the warranty card.
Yamato SM sterilizer family:
- SM-311 (this product): 36 L, 105–128 °C, 220V
- SM-301: 36 L, 115V
- SM-201 / SM-211: 22 L class (115V / 220V), 105–123 °C
- SM-501 / SM-511: 51 L class (115V / 220V), 105–128 °C
Choose the SM-311 for higher-throughput benchtop sterilize-and-dry on 220V.
