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.
