The Yamato DKN-303 is the 27 L bench-top member of the DKN forced-convection drying-oven family (brochure model DKN302), a forced-circulation constant-temperature drying oven with a maximum operating temperature of 260 °C, microcomputer PID control, and full program operation. It is the entry-capacity, entry-price unit in a family that scales to 535 L, and it is the natural pick for routine drying, curing, and dry-heat conditioning at the single-bench scale where 27 L of chamber volume is sufficient.
Key Specifications
| SKU | DKN-303-115V |
| Brochure model | DKN302 (27 L) |
| Type | Forced-convection (forced-circulation) constant-temperature drying oven |
| Temperature control range | 0 to 260 °C (ambient 23 °C, no load, damper full closed) |
| Temperature adjustment accuracy | ±1 °C (mid-chamber, set 210 °C, damper closed) |
| Temperature distribution accuracy | ±2.5 °C (set 210 °C, damper closed) |
| Temperature rise time | Approx. 60 min |
| Capacity | Approx. 27 L |
| Internal dimensions (W×D×H) | 300 × 300 × 300 mm |
| External dimensions (W×D×H) | 410 × 451 × 670 mm |
| Heater | Iron-chrome heater, 0.8 kW |
| Power supply | 100V AC, 8.5A, 50/60 Hz (US nominal 115V) |
| Weight | Approx. 35 kg |
| Controller | Type VS4, PID heater control by microcomputer |
| Sensor | K-thermocouple |
| Shelves | 2 shelves (withstand load 15 kg / shelf) |
Application Profile
The 27 L DKN-303 targets everyday laboratory dry-heat work where a forced-convection oven's active air circulation matters more than raw chamber size:
- General drying. Glassware, samples, and prepared media where uniform, repeatable dry heat is required.
- Curing and post-processing. Coatings, adhesives, and epoxies with defined temperature/time profiles.
- Moisture determination and gravimetric prep. Dry-to-constant-weight workflows benefiting from forced-air uniformity.
- Conditioning and method development. Controlled soaks below 260 °C, with 32-step program capability for multi-stage ramp/soak recipes.
Forced convection (a circulating sirocco-style airflow) delivers tighter temperature uniformity and faster recovery after door openings than a natural-convection oven of the same class, the reason to select the DKN family over a gravity-convection oven when uniformity and throughput matter. (See the gravity-vs-forced-convection-oven selection hook.)
Design Architecture
The DKN-303 uses forced circulation driven by a fan with the heater in the airflow path, governed by a microcomputer PID controller (type VS4) reading a K-thermocouple. A front damper allows the operator to trade uniformity (closed) for moisture exhaust (opened). Operation modes include fixed temperature, quick auto-stop, auto-stop, auto-start, and program operation, with additional lock, auto-recovery after power failure, and calibration-offset functions. Calibration offset can be trimmed to either the plus or minus side across the full temperature range.
Safety and self-diagnostics are integral: an earth-leakage breaker and an independent overheating-prevention device, plus self-diagnostic coverage for sensor, heater, SSR, memory, internal-communication, and temperature-input-circuit faults, and an automatic overheating-prevention function. Construction is a single silicon-packing door with a 0.8 kW iron-chrome heater. The unit runs on standard single-phase 100V AC (US nominal 115 V) at 8.5 A, so it does not require the 200 V service the larger family members need.
Frequently Asked Questions
What is the DKN-303's chamber capacity? Approximately 27 L (brochure model DKN302), the entry-capacity, entry-price member of the DKN forced-convection drying-oven family, which scales to 535 L.
What temperature range and uniformity does it deliver? 0 to 260 °C, with ±1 °C adjustment accuracy and ±2.5 °C distribution (set 210 °C, damper closed), under microcomputer PID control (type VS4).
Why choose forced convection over a natural-convection oven? Forced circulation delivers tighter uniformity and faster recovery after door openings than a gravity-convection oven of the same class.
What electrical service does it require? Standard single-phase 100V AC (US nominal 115V) at 8.5 A. It does not need the 200 V service the larger family members require.
How many program steps does it support? Up to 32-step program operation, plus fixed-temperature, quick auto-stop, auto-stop and auto-start modes.
Ordering & Configuration
Standard delivery includes the oven, 2 stainless shelves (15 kg/shelf load rating), and the instruction manual.
As a capital drying oven, the DKN-303 is sold through a quote. Confirm at quote: voltage and plug configuration (this 115V-nominal variant maps to the brochure's 100V AC / 8.5 A rating; confirm your bench service); the application temperature and program profile (target soak ≤ 260 °C and any multi-step ramp/soak recipes); shelf count and load distribution for your sample set; the 410 × 451 × 670 mm external bench footprint (clearances and exhaust routing); and lead time and warranty per Yamato standard capital-equipment terms.
Request a quote to configure the DKN-303-115V for your drying, curing, or dry-heat conditioning workflow.
DKN forced-convection oven family (capacity ladder): DKN302 (27 L, this unit) → DKN402 (90 L) → DKN602/612 (150 L) → DKN812 (300 L) → DKN912 (535 L). Larger members move to 200 V service and, at the top of the range, a 210 °C ceiling and double-door construction.
