The Yamato BM-312A is a 5 L digital water bath with PID temperature control across room temp +10 to 90 °C, holding ±1 °C, a step up from analog dial baths for work that needs a stable, digitally set water temperature. It is the 200–230V build of the BM302A/312A 5 L bath (the 115V sibling is the BM302A), with a flat-shaped tank that has no heater or sensor inside for easy cleaning and water changes.
Key Specifications
| SKU | BM-312A |
| Model / capacity | Yamato BM312-A, 5 L water bath |
| Operating temp. range | Room temp. +10 to 90 °C |
| Control accuracy | ±1 °C |
| Control system | PID microprocessor |
| Setting / display | Digital ▲/▼ key entry, white LED display (1 °C min. digit) |
| Heater | Aluminum-sheathed SUS316 pipe heater, 1 kW |
| Sensor | Pt100 Ω |
| Tank | Flat-shaped, ~5 L (no heater/sensor inside) |
| Bath medium | Water |
| External dimensions | Φ262 mm (max D286) × H240 mm |
| Weight | ~4.5 kg |
| Safety | Overheat prevention, independent overheat protection, upper-limit alarm, overcurrent fuse, thermal fuse |
| Voltage | 200–230V, 5–6 A (115V = BM302A) |
Application Profile
A digital water bath is the everyday constant-temperature tool of the wet lab: reagent and sample warming, gentle thawing, enzyme and molecular-biology incubations, and constant-temperature reactions all rely on a stable, reproducible water temperature. The BM-312A's PID control and ±1 °C accuracy make it a better fit than an analog dial bath (like the BM-100/110) where a specific setpoint must be held and shown on a display. The flat-shaped tank with no internal heater or sensor is the practical touch, nothing protrudes into the water, so cleaning, descaling and water changes are quick, and the whole bottom is usable. With a 1 kW aluminum-sheathed heater and a 5 L tank, it warms and recovers briskly for a bath its size.
As a water bath, its ceiling is 90 °C (sub-boiling); for higher temperatures or non-aqueous work, a Yamato oil bath (BO/BOG/BOS series) is the correct selection. See the water-bath-vs-oil-bath guidance.
Frequently Asked Questions
What temperature range does the BM-312A reach? Room temperature +10 to 90 °C, with ±1 °C PID control and a digital display.
How big is the tank? 5 L, flat-shaped, with no heater or sensor inside for easy cleaning.
Analog or digital control? Digital. PID microprocessor control with white-LED display and ▲/▼ key entry, versus the analog dial of the BM-100/110 baths.
What voltage is it? The BM-312A is the 200–230V build; the BM302A is the 100–115V version of the same 5 L bath.
Can it go above 90 °C or use oil? No. It is a water bath with a 90 °C ceiling. For higher temperatures or non-aqueous media, use a Yamato oil bath.
Ordering & Configuration
Confirm at quote: supply voltage (this SKU is 200–230V) and whether you want the optional bath protection cover (BC102). Fill with water only.
Warranty: Per Yamato standard terms. Confirm coverage at quote.
Add the Yamato BM-312A to a quote to lock voltage and accessories.
Positioning: the BM-312A is the 5 L digital water bath in the BM line. Choose it over an analog BM-100/110 when you need a displayed, PID-held setpoint; step to a Yamato oil bath when your work exceeds 90 °C or requires a non-aqueous medium.
