The BO-302A is Yamato's economy constant-temperature oil bath — a 5 L flat-bottomed bath (φ240 mm ID) with no heater or sensor inside the reservoir, making it easy to clean. Designed primarily as a rotary-evaporation heat source (compatible with Yamato RE202-A/212-A and REV-202M-A/212M-A evaporators), it delivers digital PID control to a 180 °C ceiling. This is the 100-115V variant; the 200-230V sibling is the BO-312A.
Key Specifications
| SKU | BO-302A |
| Type | Economy constant-temperature oil bath, flat-bottom, digital PID |
| Reservoir capacity | ~5 L (φ240 mm ID) |
| Temperature control range | Room temp. +10 °C to 180 °C |
| Temperature accuracy | ±2.0 °C |
| Control system | PID control, Pt100Ω sensor, white LED digital display (1 °C min. digit) |
| Heater | 1000 W aluminum sheathed heater |
| Bath reservoir | Stainless steel (flat-shaped, no internal heater/sensor) |
| Exterior | PBT (fiber-glass reinforced) |
| External dimensions | φ262 mm (max. D286) × H240 mm |
| Weight | ~4.5 kg |
| Service outlet | 2 A |
| Voltage / power | 100-115V, 10-12 A, 15 A fuse (200-230V sibling = BO-312A) |
Application Profile
The 5 L flat-bottom oil bath is built as a clean, high-capacity heat source for evaporation and constant-temperature work:
- Rotary-evaporation heat source — matched to Yamato RE202-A/212-A and REV-202M-A/212M-A rotary evaporators
- Constant-temperature oil heating to 180 °C for synthesis and sample conditioning
- Reactions above the water-bath ceiling — oil enables set points past 100 °C
- Wide, shallow flask immersion — the large φ240 mm bath accepts large evaporation flasks
- Workflows needing easy cleanup — the flat interior with no submerged heater or sensor wipes out cleanly
At ±2.0 °C control the BO-302A targets broad, stable heating rather than tight-uniformity metrology; for tighter control choose the BOG/BOS remote-controller series.
Design Architecture
A 1000 W aluminum-sheathed heater and Pt100Ω sensor sit outside the reservoir, driving PID control with a white LED digital display (1 °C minimum digit). Keeping heater and sensor out of the bath is what makes the flat stainless reservoir easy to clean. The PBT (fiber-glass) exterior resists heat and solvents. A built-in 2 A service outlet powers an attached rotary evaporator, and the unit resumes automatically after a power interruption. Safety layers include automatic overheat prevention, an independent overheat prevention device (fixed-temperature type), a temperature upper-limit error alarm, an overshoot alert, and an overcurrent-protection fuse.
Frequently Asked Questions
What is the BO-302A's reservoir capacity? ~5 L in a φ240 mm flat-bottom stainless reservoir.
What temperature range and accuracy does it offer? Room temperature +10 °C to 180 °C under digital PID control, held to ±2.0 °C.
Why does the BO-302A have no heater or sensor inside the bath? The 1000 W heater and Pt100Ω sensor sit outside the reservoir, so the flat interior wipes out cleanly — the unit is built as an easy-to-clean rotary-evaporation heat source (matched to Yamato RE202-A/212-A and REV-202M-A/212M-A evaporators).
Is oil included? No. Fill to ~5 L with a suitable heat-transfer/silicone oil for the target set point — oil is not included.
What voltage is the BO-302A? The 100-115V variant; order the BO-312A for 200-230V.
Ordering & Configuration
In the box: 3 m power cable with inlet plug, spare 15 A main-power fuse (large), and spare 2 A service-outlet fuse (small).
Add oil separately. Fill to ~5 L with a suitable heat-transfer/silicone oil for the target set point — oil is not included.
Confirm voltage. BO-302A covers the 100-115V range (choose a suitable power plug); order BO-312A for 200-230V. Note: at low ambient temperature or if source voltage falls below ~95 V, the maximum temperature may not be reached.
Optional accessory: BC102 Bath Protection Cover.
Catalog-priced; no quote gate. Confirm voltage at checkout.
Warranty: Per Yamato standard terms.
Yamato BO-302A/312A oil bath:
- BO-302A (this product) — 5 L, 100-115V
- BO-312A — 5 L, 200-230V
