Innovating science for over 125 years

Standard Muffle Furnace



Yamato muffle furnaces are recognized for their durability and tightly sealed doors which is of utmost importance when the furnace reaches their maximum temperatures of over 1000°C. The FO Series represents the standard type of muffle furnaces that use a microprocessor-controlled thermoregulator characterized by excellent repeatability. They are used for high temperature applications such as fusing glass, creating enamel coatings, ceramics, soldering and brazing metals, alloying, fusion, heat treating, melting, annealing, metallurgy, mining, environmental testing, pharmaceutical development, in R&D and more.


  • Wide  selection of space-saving compact units with maximum inner capacity
  • Easy to use controller
  • Excellent heat tightness with a firmly sealed chamber door
  • High temperature accuracy at ±2.0°C
  • Program operation of maximum of 6 patterns: 30 steps x 1 pattern, 15 steps x 2 patterns or 10 steps x 3 patterns
  • Safety features include self-diagnostic functions, calibration off-set, lock function, auto-recovery after power failure, earth leakage breaker and automatic overheat prevention device
  • Selectable options include exhaust system unit, N₂ gas loading device (with flow meter), temperature output terminal, time up/alarm output terminal and sample tray
  • Upgraded with long life R-thermocouple sensors
  • Designed with communication port
Operating temp. range100~1150°C
Temp. control accuracy±2°C (at 1150 ° C)
Max. temp. reaching time~60min.~60min.~70min.~70min.
Exterior materialCold rolled steel plate with baked-on melamine resin finish
Internal materialCeramic fiber
HeaterIron-chrome wire
Exhaust portø20mm (top)
Cooling Fan TypeAxial fan motor
Temp. controllerPID controll by microprocessor
Temp. setting/display methodDigital setting by▲/▼ keys / Digital display
Operation functionFixed temperature, quick auto stop, auto stop, auto start, program (maximum 6 patterns: 30 steps x 1 pattern, 15 steps x 2 patterns or 10 steps x 3 patterns)
Additional functionsCalibration off-set, power failure compensation, lock, RS485 communication interface
Timer1 min. to 99 Hrs. 59 min. and 100 Hrs. to 999 Hrs.
Safe DeviceSelf diagnostic (memory error, heater disconnection, sensor error, SSR short curcuit), Electric leakage breaker, Overheat prevention device
Internal dimensions WxDxH100×150×100 mm100×250×150 mm200×250×150 mm200×300×150 mm
External dimensions WxDxH346×405×517 mm346×505×567 mm446×505×567 mm446×554×567 mm
Internal capacity1.5L3.75L7.5L9L
Power source (50/60Hz)AC115V 10A
AC220V 5A
AC115V 14.5A
AC220V 7.5A
AC115V 19A
AC220V 9.5A
AC220V 10.5A single phase
AccessoriesExhaust port cap 1 pc.


Click on the links below to download the associated PDFs.

Muffle Furnace Overview

FO Series Catalog

FO Series Poster

To download Operational Manual, visit our Technical Support Center