The Yamato FO-101CR is a 1.5 L benchtop muffle furnace reaching 1150 °C with ±2 °C control accuracy at top temperature, built on a lightweight ceramic-fiber chamber and a factory-fitted communication port for RS485/RS232C data output. Its compact 100 × 150 × 100 mm chamber and PID VS4 controller suit ashing, ignition-loss, and small-batch heat-treatment work where bench space is tight. This is the 115V variant; the 220V sibling is the FO-111CR.
Key Specifications
| Model / capacity | Yamato FO100 (FO-101CR, comm-port gen) — approx. 1.5 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), 1.0 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 × 150 × 100 mm (W×D×H) |
| External dimensions | 346 × 405 × 516 mm (W×D×H) |
| Weight | Approx. 24 kg |
| Power supply | 115V, 50/60 Hz (base FO100: 100V AC single phase, 11 A) |
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-101CR 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.
The ceramic-fiber chamber heats and cools quickly and draws less power than a firebrick furnace, which is why the small FO models reach 1150 °C in roughly an hour. 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) lets you script staged ramp-soak-cool profiles for reproducible ashing or annealing. For clean gravimetry, allow full burn-off before weighing and — where volatile or corrosive off-gassing is expected — pair the furnace with the optional exhaust system unit.
Frequently Asked Questions
What maximum temperature does the FO-101CR reach? It operates from 100 to 1150 °C, with ±2 °C adjustment accuracy at 1150 °C.
How long does it take to heat up? Approximately 60 minutes to reach 1150 °C (about 40 minutes to 850 °C), aided by the low-mass ceramic-fiber chamber.
What does the "communication port" (CR) add? The CR generation provides an RS485/RS232C communication port for data output/logging — corresponding to the communication adapter listed as optional in the base-model manual.
Can it run automated ramp-and-soak profiles? Yes — the VS4 controller supports fixed-temperature, timer, and program operation with up to 6 patterns (30 steps×1, 15×2, or 10×3), plus auto-recovery after a power failure.
What ships with it? A spare fuse and the instruction manual. Optional accessories include an exhaust system unit, sample tray, N₂ gas leading device, and time-up/alarm output terminals.
Ordering & Configuration
Add to quote or cart for a formal quotation. At quote we confirm supply voltage (this is the 115V SKU; order FO-111CR for 220 V), exhaust/off-gas handling, any output-terminal or sample-tray options, and lead time.
At ~24 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, 1.5 L (comm-port generation):
- FO-101CR (this product) — 1.5 L, 115V
- FO-111CR — 1.5 L, 220V
- Step up in the FO line (FO-201CR 3.75 L, FO-301CR 7.5 L …) for larger charges; step to the FP series for ±1.5 °C accuracy and ramp programming.
