High-performance, energy-saving, programmable constant temperature, forced convection ovens with air velocity control and exhaust dampers. The first 2 in 1 system in the industry!
SKU: DNF-911
Manufacturer part number: DNF-911


High-performance,  energy-saving,  programmable constant temperature, forced convection ovens with air velocity control and exhaust dampers.  The first 2 in 1 system in the industry!

Performance and functions

  • Two types of circulation, forced and natural convection, in one unit (compatible with model 300/400/600)
  • Eco-oven with improved air velocity control system and adjustable damper
  • Program featured to reduce power consumption significantly
  • Superior heat tightness and insulation of chamber
  • Excellent dust tightness, dust can hardly enter the chamber
  • Air velocity changeable in 10 stages using digital setting of controller
  • Standard with 99 step program operation with repeat operation, auto start, auto stop and quick auto stop functions
  • Adjustable damper position at chamber front to optimize operation
  • Fluorescent display, interactive input method, calibration off-set function
Circulation method Forced convection + Natural convection Forced convection
External temp. range 5~35°C
Temperature set range 0~130°C (Wind velocity: 0), 0~270°C (Wind velocity: 1~10) 0~270°C (Wind velocity: 1~10)
Temperature control range RT +25~120°C (Wind velocity: 0), RT +15~260°C (Wind velocity: 1~10) RT +15~260°C (Wind velocity: 1~10)
Temp. control accuracy *¹ Forced convection ±0.3°C (at 260°C)
Natural convection ±0.5°C (at 120°C) ±0.3°C (at 120°C) Not applicable
Temp. fluctuation *¹ Forced convection ±0.5°C (at 260°C)
Natural convection ±1.0°C (at 120°C) ±0.8°C (at 120°C) ±0.6°C (at 120°C) Not applicable
Temp. distribution precision *¹ Forced convection ±2.5°C (at 260°C)
Natural convection ±5°C (at 120°C) ±3°C (at 120°C) Not applicable
Temp. gradient *¹ Forced convection 5°C (at 260°C) 7°C (at 260°C) 8°C (at 260°C) 12°C (at 260°C) 6°C (at 260°C)
Natural convection 15°C (at 120°C) 13°C (at 120°C) Not applicable
Temp. rise time *¹ Forced convection ~70min. ~105min. ~100min. ~60min. ~100min.
Natural convection ~20min. ~25min. Not applicable
Chamber / Exterior / Insulation Stainless steel / Cold rolled steel paneling, chemical-proof baked-on finish / Glass wool
Door Single swing (left side) Double doors (opening from center)
Heater (stainless steel tube) 0.8kW 0.6kWx2 0.83kWx2 1.35kWx2 1.65kWx2
Wind velocity adjusting system 10 steps (600~1500rpm) + Wind velocity (0) 10 steps (600~1500rpm)
Damper Circulation-Ventilation Manual switching: Interlocked intake and exhaust system (Complete exhaust applicable / Unable to reach 260°C with damper fully open)
Cable port Inner diameter: 33mm×1 (right side)
Exhaust port Outer diameter: 50mm×1 (back side) Outer diameter: 50mm×2 (back side)
Inlet port Inner diameter: 33mm×1 (right side) Inner diameter: 33mm×2 (both side)
Controller Model V type
Temperature control / setting system PID Z control / Digital setting with ▲/▼ keys
Temperature display system Temperature reading display: green 4-digit digital LED/Temperature setting display: orange 5-digit digital LED
Other indications LED indicates temperature patterns for heating/stabilizing/cooling
Timer Fixed temperature operation, Program operation (maximum 99 steps or 99 patterns, with repeat operation function), Timer or clock operation function (Fixed temperature operation w/ auto start/auto stop/quick auto stop, program operation auto start)
Additional functions Variable Air Flow Function, Power-on Time and Operation Time Accumulation Monitor (up to 65,535 hours); Calibration Offset; Monitoring Display for Accumulated Power Consumption, Total CO 2 Emissions, and Heater Operation Output; Power Recovery Mode; Setting Data Backup and Recovery
Temperature sensor K type Thermocouple double sensor (for temperature control and independent overheat prevention device)
Heater control Triac with Zero-cross Control
Control board Self-diagnostic Functions (Detection for Temp. Sensor Failure, TRIAC Short Circuit, Automatic overheating prevention, Heater Line Disconnect, Main Relay Contact Damage ), Earth leakage breaker, Fan Motor Failure, Key Lock Function, Independent overheating prevention device
Earth leakage breaker Leak Current/Short Circuit/Over-current Protection, Rated Current Sensitivity 30mA
Door switch Door open: fan motor and heater circuit OFF, Door close: fan motor and heater circuit ON
Internal dimensions (W×D×H mm)*² 300×300×300 450×450×450 600×500×500 600×500×1000 1090×500×1000
External dimensions (W×D×H mm)*² 430×495×740 580×645×890 730×695×940 730×695×1685 1220×695×1685
Capacity 27L 90L 150L 300L 540L
Weight ~50kg ~75kg ~90kg ~135kg ~210kg
Number of shelf bracket step / pitch 6steps/30mm 11 steps/30mm 13 steps/30mm 29 steps/30mm
Withstand load of shelf 15kg/shelf
Power supply V±10% 50/60Hz Single phase AC115V, 7.5A (with plug) AC115V 11A (with plug)
AC220V 6A (no plug, round terminal)
AC115V 15A (with plug)
AC220V 8A (no plug, round terminal)
AC220V 15.5A (no plug, round terminal) AC220V 18.5A (no plug, round terminal)
Shelf plate / bracket 2 pcs. / 4 pcs. 4 pcs. / 8 pcs. 8 pcs. / 16 pcs.


*1. Temperature Accuracy / Rise time Standard: Testing Machinery Association of Japan. Temperature Fluctuation/Gradient Standard: Japanese Industrial Standard
Performance data above based on 115V or 220V AC supplied power, 23°C±5°C (room temperature), 65%RH ±20% humidity, maximum air speed (FAN setting 10), damper closed, and no process load.
*2. Protrusions excluded.

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