The Yamato SM-301 is an automatic high-pressure steam sterilizer with a drying stage (SM300 class), running a microprocessor-controlled STERILIZE or STERILIZE & DRY cycle in a 36 L (1.2 cu ft) chamber. Sterilization runs 105–128 °C at up to 0.2 MPa (29.0 psi), followed by a hot-air dry to 150–180 °C. This is the 115V model; the 220V sibling is the SM-311.
Key Specifications
| SKU | SM-301 |
| Base model | Yamato SM300 |
| 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) | 1.7 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 | AC115V, 17 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-301 automates the whole cycle (air purge, pressurization, timed hold at setpoint, then cooling) with an optional drying stage so loads emerge sterile and dry, ready to store or use.
The 36 L chamber steps up from the 22 L SM200 class for higher-throughput benchtop work: larger media batches, more glassware, mixed instrument loads. Its slightly higher 128 °C / 0.2 MPa ceiling shortens dense-load cycles versus the SM200. Always run with the basket in place, fill with distilled water (2800–3000 mL) to prevent scale and corrosion, and confirm 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 stops 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 is it different from the SM-201? The SM-301 has a larger 36 L chamber and a higher 128 °C / 0.2 MPa ceiling (versus 22 L, 123 °C, 0.18 MPa on the SM-201), for bigger or denser loads.
Which voltage is this? This is the 115V model (AC115V, 17 A); order SM-311 for 220V supply.
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-301 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-301 (this product): 36 L, 105–128 °C, 115V
- SM-311: 36 L, 220V
- 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-301 for higher-throughput benchtop sterilize-and-dry on 115V.
