SINCE 1889 Yamato Scientific Co.,Ltd.
Industrial & Laboratory Constant Temperature Ovens

 DNF400/410/600/610/810/910 have been discontinued.


  • Special construction makes it difficult for dust from surrounding environment to enter the oven.
  • Temperature settings, measurement temperatures, over-heating prevention temperature settings are displayed simultaneously with the digital setting and display system.
  • Programmable operation enables a maximum of 32 steps repeat and graduated operation.
  • Calibration offsetting, timer, integrated time calculation and other added functions.
  • Comprehensive safety features.
  • A recorder can be equipped as option.
High-performance, energy-saving, programmble constant temperature, forced convection ovens with air velocity control and exhaust dampers.
They achieve an energy-saving rate of 30 to 40% compared to previous models. Air velocity can be changed in 10 stages using the digital setting of the controller. Operability has been enhanced by locating a slider-type open/close adjustment knob on the front side of the main unit.

810 910
Operating Temperature Range
Room temp. +10deg.C to 260deg.C
Temp. Distribution Accuracy
±2.5deg.C (at260deg.C)
Internal Capacity (L)
90 150 300 540

PDF Catalog

Model DNF400 DNF410 DNF600 DNF610 DNF810 DNF910
Circulation method Air velocity control, Forced air circulation(with manual slide type exhaust damper)
Operating temperature range Room temp. +10 to 260deg.C
Temp. adjustment accuracy ±0.5deg.C (at 260deg.C)
Temp. distribution accuracy ±2.5deg.C (max. air velocity, at 260deg.C)
Max. temp. reaching time Approx. 75 min. Approx. 60 min. Approx. 75 min.
Interior/Exterior material Stainless steel /Electro-galvanized steel sheet with epoxy and melamine resin baking finish
Heat insulating material Glass wool
Heater Stainless pipe heater,
1.25 kW
Stainless pipe heater,
1.5 kW
Stainless pipe heater,
1.35 kW×2
Stainless pipe heater,
1.65 kW×2
Fan Type Scirocco fan
Motor DC24V, Brushless motor (800~1,500rpm) variable type (10 steps), 50W 50W×2
Cable hole/Air in-take hole 30mm I.D. (the right side) each 1pc.
Exhaust port 50mm I.D.×1 pc. (the back) 50mm I.D.×2 pcs.(the back)
Temp. controller PlD control by microprocessor
Temp. setting method Digital setting by UP/DOWN key
Temp display method Digital display by Orange LED (4 digit)
Timer/Min.division 0 min. to 999 Hrs. 59 min. /1 min.
Operation function
Program mode
Fixed temperature operation, Program operation, Auto start, Auto-stop,
Program operation; Maximum 32 steps, Repeat function
Additional functions Timer (Total operating hours : max. 49,999 Hrs.), Calibration offset function, Time display, Fan stop
Heater circuit control Triac zero-cross control
Sensor K-thermocouple
Safe Device
Safety countermeasures Self diagnosis functions (temp. sensor abnormal, Heater disconnection, SSR- short, Main relay abnormal, Automatic overheating prevention), Key lock function, Independent overheat prevention, Electric leakage breaker with over current protection
Internal dimensions (W×D×Hmm)
External dimensions(W×D×Hmm)
Internal capacity
90 liters
150 liters
300 liters
1,220 ×696×1,675
540 liters
Shelf plate with standard load Approx. 15kg/piece
Shelf rest step number 11 steps 13 steps 29 steps 29 steps
Shelf rest pitch 30 mm
Power source 50/60Hz AC 100V
single phase
single phase
AC 100V
single phase
single phase
AC 200V/220V
single phase
AC 200V/220V
single phase
weight Approx. 61 kg Approx. 77 kg Approx. 113 kg Approx. 180 kg
Shelf plate Stainless steel, 2 pcs. Stainless steel, 4 pcs. Stainless steel, 8 pcs.
Shelf bracket 4 pcs. (1 pair - 2 pcs. is fixed) 8 pcs. (Same as left) 16 pcs. (2 pairs are fixed)

* The performance shown here is the value under the condition of the ambient temperature of 23deg.C±5deg.C, humidity of 65%RH±20%.

* The projection is not included for Internal dimensions and External dimensions.

Control Panel Temp.Rising Curve




Dimensions (mm)

Optional items
Remark Description Model No. Product Code
ON61 Stand for DNF400/410/600/610 DNF Series 211856
OT42 Stand for DNF400/410 DNF Series 212348
OT62 Stand for DNF600/610 DNF Series 212349
  Stacking support for ODN26 DNF400/410 DNF Series 212806
  Stacking support for ODN28 DNF600/610 DNF Series 212807
  Shelf (with support 2 pcs) for DNF400/410 DNF Series 212246
  Shelf (with support 2 pcs) for DNF600/610/810 DNF Series 212266
  Shelf (with support 2 pcs) for DNF910 DNF Series 212490
Cable port, 25mm dia DNF Series 281037
Cable port, 50mm dia DNF Series 281038
Door, right open type for DNF400/410 DNF Series 281039
Door, right open type for DNF600/610 DNF Series 281040
Door, right open type for DNF810 DNF Series 281041
External communication function (RS485) DNF Series 281042
External communication adapter (changeable to RS232C) DNF Series 281043
Temperature output terminal  DNF Series 281044
External alarm terminal  DNF Series 281045
Time-up output terminal DNF Series 281046
Individual alarm output terminal (4 points output) DNF Series 281047
Sample temperature monitoring terminal (max 3 terminals) DNF Series 281048
Sheath sensor for sample monitoring (K-thermocouple) DNF Series 281049
Flange for exhaust port (DNF910 requires 2 pcs.) DNF Series 281050
Exhaust duct (50mm dia with exhaust flange) for DNF400/410 DNF Series 281051
Exhaust duct (50mm dia with exhaust flange) for DNF600/610 DNF Series 281052
Exhaust duct (50mm dia with exhaust flange) for DNF810 DNF Series 281053
Exhaust duct (50mm dia with exhaust flange) for DNF910
(50mm dia with exhaust flange x 2 points)
DNF Series 281054
1. The item marked " ● " in the column of "Remark" shall be ordered together with the main unit.
2. The transportation cost will not be required if the order is together with main unit except the item marked "○".
In case you order the item marked "○" together with the main unit, please ask Yamato to obtain the correct transportation cost.

ON Model

OT Model
Mounting Parts
Shelf (with 2 support)

Stainless Punching Metal (Weight Tolerance 15kg/pc)