The Yamato FO-211CR is a 3.75 L benchtop muffle furnace reaching 1150 °C with ±2 °C control accuracy at top temperature, on a low-mass ceramic-fiber chamber with a factory-fitted communication port for RS485/RS232C data output. It is the 220 V counterpart of the 3.75 L FO furnace, for labs on 220 V single-phase supply. Chamber, heater, and dimensions follow the FO200 base model; the 115 V sibling is the FO-201CR.
Key Specifications
| Model / capacity | Yamato FO200 (FO-211CR, comm-port gen) — approx. 3.75 L |
| Operating temperature range | 100 to 1150 °C |
| Adjustment accuracy | ±2 °C (at 1150 °C) |
| Time to reach temperature | Approx. 60 min to 1150 °C (approx. 40 min to 850 °C) |
| Control system | PID control by VS4 controller |
| Sensor | R thermocouple (W sensor) |
| Setting / display | Digital setting; digital display |
| Operation functions | Fixed temperature; timer (auto-stop, auto-start); program (max. 6 patterns — 30 steps×1 / 15×2 / 10×3) |
| Communication | Communication port (RS485/RS232C) — CR generation |
| Additional functions | Lock function; auto recovery after power failure; calibration offset |
| Heater | Iron-chrome wire (Kanthal AF), 1.5 kW |
| Furnace unit | Ceramic fiber |
| Cooling fan | Axial fan motor |
| Safety devices | Earth-leakage/circuit breaker, thermal fuse, overheating-prevention device, self-diagnostics |
| Ambient temperature range | 5 to 35 °C |
| Internal dimensions | 100 × 250 × 150 mm (W×D×H) |
| External dimensions | 346 × 405 × 516 mm (W×D×H) |
| Weight | Approx. 30 kg |
| Power supply | 220V, 50/60 Hz (200V amperage not documented at this capacity — confirm at quote) |
Application Profile
A muffle furnace isolates the sample from the heating elements behind a refractory "muffle," so combustion products and radiant elements never contact the charge — the reason it is the standard tool for gravimetric ashing, loss-on-ignition, sample incineration, and small-part heat treatment. Reaching 1150 °C, the FO-211CR covers the temperatures used in ASTM/AOAC ash determinations, coal and food ashing, and residue-on-ignition work, where a clean, repeatable burn-off is what makes the mass measurement valid. Its deeper 3.75 L chamber lets a lab batch several crucibles per run for higher throughput.
The ceramic-fiber chamber heats and cools quickly and draws less power than a firebrick furnace, so the FO-211CR still reaches 1150 °C in roughly an hour despite the larger volume. Control is PID via the VS4 controller with an R thermocouple, holding ±2 °C at 1150 °C; a 6-pattern program (up to 30 steps) scripts staged ramp-soak-cool profiles. For clean gravimetry, allow full burn-off before weighing and — where volatile or corrosive off-gassing is expected — add the optional exhaust system unit.
Frequently Asked Questions
What maximum temperature does the FO-211CR reach? It operates from 100 to 1150 °C, with ±2 °C adjustment accuracy at 1150 °C.
What is the electrical rating on the 220 V version? The supplied FO100-810 manual documents the 3.75 L model at 100 V (16 A) only; the 220 V amperage is not stated in the brochure, so it is confirmed at quote rather than inferred here. The 115 V sibling FO-201CR is the documented electrical build.
How long does it take to heat up? Approximately 60 minutes to reach 1150 °C (about 40 minutes to 850 °C).
What does the "communication port" (CR) add? The CR generation provides an RS485/RS232C communication port for data output/logging.
Can it run automated ramp-and-soak profiles? Yes — the VS4 controller supports fixed-temperature, timer, and program operation with up to 6 patterns, plus auto-recovery after a power failure.
Ordering & Configuration
Add to quote or cart for a formal quotation. At quote we confirm the 220 V electrical rating (not documented in the brochure at this capacity), exhaust/off-gas handling, output-terminal options, and lead time.
At ~30 kg and 346 × 405 × 516 mm, site it on a stable, noncombustible bench with clearance and ventilation for the hot exterior and exhaust. Warranty: per Yamato standard capital-equipment terms — confirmed at quote.
Yamato FO muffle furnace, 3.75 L (comm-port generation):
- FO-211CR (this product) — 3.75 L, 220V (electrical rating confirmed at quote)
- FO-201CR — 3.75 L, 115V (documented at 100V/16A)
- Step up to FO-311CR (7.5 L) for larger charges.
