Large Capacity Oil Bath 37L With External Transformer Overview
The Large Capacity Oil Bath 37L With External Transformer (model BOA311) is a high-temperature oil bath from Yamato Scientific, supplied by LabSupplies.com as an authorized dealer. Its 37-liter reservoir heats from room temperature +10°C up to 270°C, supporting demanding thermal work across research and QC laboratories.
Construction pairs a stainless steel inner bath with a melamine-resin-coated iron and steel exterior, while PET resin film protects the control plates. Jet stirring circulates the silicone-oil medium for tight temperature distribution of ±0.2°C at 200°C. A Pt100Ω platinum sensor feeds PID control managed by an onboard microcomputer.
Operating on 220V power, the unit occupies a 36 × 36 × 30 inch footprint and weighs 130 lbs. Yamato manufactures the bath in Japan under ISO 9001:2015 and ISO 14001:2015 certification. An external transformer ships with the system.
Key Features
- Jet stirring: circulates silicone oil for high temperature-distribution accuracy, holding ±0.2°C and ±0.1°C accuracy at 200°C.
- Triple overheat prevention: automatic shut-off at set point +6°C, an overheat-prevention device, and an independent overheat-prevention device.
- Float-switch protection: dual float switches guard against empty heating and oil overflow.
- Emergency safety: emergency-stop switch forces cut-off of the overcurrent circuit, backed by an overcurrent leakage breaker and key lock.
- Digital control: green 4-digit LED shows the reading, red 4-digit LED shows the set point, with menu and ▲▼ key entry.
- Connectivity: external alarm output, temperature output (4–20 mA / 1–5V), RS485 communication, self-diagnostic and power-failure compensation functions.
How to Choose the Right Oil Bath
Matching an oil bath to your workflow comes down to reservoir size, temperature ceiling, control sophistication, and site power. Weigh each axis against your throughput and safety requirements before specifying a unit.
- Capacity: a 37 L reservoir suits large vessels or batch immersion; confirm the working volume fits your flasks and sample count.
- Temperature range: this bath reaches room temperature +10°C to 270°C, so verify your protocol stays within that window with silicone oil.
- Control type: PID microcomputer control with digital LED readouts delivers tight setpoint stability versus simpler analog dials.
- Voltage: the 220V configuration ships with an external transformer; match it to your bench circuit and available power.
- Footprint: plan for the 36 × 36 × 30 inch dimensions and 130 lb weight on a stable surface.
- Safety devices: triple overheat prevention, float switches, and an emergency-stop switch matter for unattended high-temperature runs.
Specifications
| Specification | Detail |
|---|---|
| Capacity | 37 L |
| Voltage | 220V |
| Operating Temperature Range | Room temperature +10°C to 270°C *1 |
| Temperature Accuracy | ±0.1°C (at 200°C, silicone oil) *2 |
| Temperature Distribution | ±0.2°C (at 200°C, silicone oil) *2 |
| Heat-up Time | ~70 min (to 200°C) *2 |
| Temperature Control System | PID control by microcomputer |
| Temperature Setting / Display | Digital menu and ▲▼ keys; green 4-digit LED (reading), red 4-digit LED (set point) |
| Sensor | Pt100Ω platinum sensor |
| Stirring | Jet stirring for high temperature-distribution accuracy |
| Reservoir Capacity | ~37 L |
| Heat-Transfer Medium | Silicone oil (heat-resistant dimethyl silicone, viscosity ≤100 cSt) |
| Safety Devices | Triple overheat prevention (auto shut-off at set +6°C, overheat-prevention device, independent overheat-prevention device); emergency-stop switch; float switch (prevents empty heating and oil overflow); overcurrent leakage breaker; key lock; power-failure compensation; self-diagnostic function |
| Communication / Output | External alarm output; temperature output (4–20 mA / 1–5V); RS485 communication |
| Usage Note | Use with an exhaust device such as a fume hood — silicone-oil smoke is flammable |
| Material | Iron and steel plate baked with melamine resin coating (exterior) Stainless steel bath (inner bath) PET resin film (plates) |
| Country of Origin | Japan |
| GTIN (Barcode) | 797059932184 |
| Shipping Weight | 130 lbs |
| Dimensions (L × W × H) | 36 × 36 × 30 in |
| Component Size | 37 L |
*1 No-load operation of bath only; maximum temperature varies with circumstances and operating conditions. *2 Measured under ambient temperature 23°C ±5°C, humidity 65%RH ±20%, per Yamato Scientific test conditions.
Available Sizes and Configurations
| SKU | Configuration | Pack |
|---|---|---|
| BOA-311 | EA | EA |
Documentation
More in This Series
- Oil Bath Digital 7L
- Oil Bath 2.2L Hard Transparent Glass
- Oil Bath 2.2L Stainless Steel
- Oil Bath 1L Hard Transparent Glass
- Oil Bath 1L Stainless Steel
- Oil Bath Digital 5L
Why Buy From LabSupplies.com
Order the Yamato BOA311 oil bath directly from LabSupplies.com and receive a genuine unit backed by the manufacturer warranty. Our lab-equipment specialists answer spec questions before you commit.
- Authorized Yamato Scientific dealer: every unit is genuine and covered by the manufacturer warranty.
- In stock: ready to ship now from USA inventory.
- Ships from USA: domestic fulfillment shortens lead times.
- Specialist support: dedicated lab-equipment staff help confirm fit and specifications.
Frequently Asked Questions
What is the temperature range of the Yamato BOA311 oil bath?
The BOA311 operates from room temperature +10°C up to 270°C. PID microcomputer control with a Pt100Ω platinum sensor maintains ±0.1°C accuracy at 200°C using silicone oil.
What is the reservoir capacity and footprint?
The reservoir holds approximately 37 liters. External dimensions measure 36 × 36 × 30 inches and the unit weighs 130 lbs, so plan for a stable, dedicated bench location.
What voltage does the BOA311 require?
This configuration runs on 220V and ships with an external transformer. Confirm your bench circuit supplies the required power before installation.
What heat-transfer medium and materials are used?
Use heat-resistant dimethyl silicone oil with viscosity of 100 cSt or less. The inner bath is stainless steel, the exterior is melamine-resin-coated iron and steel, and the control plates use PET resin film.
What safety features protect against overheating?
Triple overheat prevention safeguards the bath: automatic shut-off at set point +6°C, an overheat-prevention device, and an independent overheat-prevention device. Float switches prevent empty heating and oil overflow, while an emergency-stop switch cuts the overcurrent circuit.
Does the BOA311 support external communication or monitoring?
Yes. The unit provides external alarm output, a temperature output terminal (4–20 mA / 1–5V adjustable), and RS485 communication, plus self-diagnostic and power-failure compensation functions.
