Yamato BM-401 Digital Constant-Temperature Water Bath, 7 L / 115 V vs Large Capacity Oil Bath 37 L, 220V
Which should you choose?
- ▸If budget is the priority, Yamato BM-401 Digital Constant-Temperature Water Bath, 7 L / 115 V is the lower-cost option; Large Capacity Oil Bath 37 L, 220V lists higher and typically adds capability or capacity.
Specifications side by side
| Spec | Yamato BM-401 Digital | Large Capacity Oil |
|---|---|---|
| Type | Digital constant-temperature water bath | Large-capacity constant-temperature oil bath, stirred, digital PID |
| Model | Yamato BM401 — BM-series economy water bath | — |
| Safety | Bath protection cover; self-diagnostics; circuit protector; thermal fuse | — |
| Drainage | Equipped with drain | — |
| Power source | AC115V, 11 A (50/60 Hz single phase) | — |
| Bath capacity | ~7 L | ~37 L (oil level ≤50 mm from top edge); effective ~31.9 L with lowest shelf installed |
| Control system | PID by microprocessor; digital ▲/▼, LED, 1 °C resolution | PID controller, platinum (Pt) sensor, digital ▲▼ set, 0.1 °C resolution |
| Heater / sensor | SUS316 pipe heater, 1 kW / K thermocouple | — |
| Control accuracy | ±1 °C (at 60 °C) | — |
| Country of origin | Japan | — |
| External dimensions | W310 × D360 × H230 mm; approx. 7 kg | ~531 W × 520 D × 578 H mm (bath height 397 mm) |
| Operation functions | Fixed temperature, auto start, auto stop, quick auto stop | — |
| Additional functions | Calibration offset, power-failure recovery, keypad lock | — |
| Operating temperature range | RT +5 to 95°C | — |
| Class | — | Capital — large durable heating instrument |
| Heater | — | SUS316 pipe heater, 4.5 kW |
| Weight | — | ~37 kg |
| Stirrer | — | Vertical propeller, 25 W induction motor |
| Bath dimensions | — | ~440 W × 460 D × 320 H mm |
| Voltage / power | — | 200V AC single-phase, 23 A (with external transformer) |
| Temperature control range | — | Room temp. +10°C to 270°C |
| Temperature control accuracy | — | ±0.1°C (200°C silicone oil) |
| Effective internal dimensions | — | ~293 W × 340 D × 270 H mm (top edge to lowest shelf) |
| Temperature distribution accuracy | — | ±0.3°C (200°C silicone oil) |
Highlighted rows differ. Specs are sourced from manufacturer documentation.
FAQ
- What's the difference between the Yamato BM-401 Digital Constant-Temperature Water Bath, 7 L / 115 V and the Large Capacity Oil Bath 37 L, 220V?
- The main differences are in Type, Model, Safety. The table above shows every spec side by side; the decision guide highlights which fits which use case.
- Which should I buy?
- If budget is the priority, Yamato BM-401 Digital Constant-Temperature Water Bath, 7 L / 115 V is the lower-cost option; Large Capacity Oil Bath 37 L, 220V lists higher and typically adds capability or capacity.
- Do both carry a warranty?
- Yes — both are sold through Legacy Lab Supplies as an authorized distributor and carry full manufacturer warranty.
Still deciding? Our team compares options with you — no pressure.