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.
