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 rated to 260 °C with microcomputer PID control and full program operation. This is the 220V-nominal export variant of the DKN-303. It suits laboratories on 220 V single-phase service that need entry-capacity forced-convection drying, curing, and dry-heat conditioning at the single-bench scale.
Voltage note (author-flagged): The brochure itemizes the 27 L model (DKN302) only at 100V AC / 8.5 A; a 220V rating for this specific capacity is not printed in the specification table (the family's 200 V single-phase service appears on the larger DKN612/812/912). Treat the 220 V figure as a nominal export configuration and confirm exact current draw and plug type with Yamato at quote.
Key Specifications
| SKU | DKN-303-220V |
| 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 | 220V nominal (export variant; confirm current draw; brochure itemizes 27 L at 100V/8.5A only) |
| 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 forced-air circulation matters more than raw chamber size:
- General drying. Glassware, samples, and prepared media requiring uniform, repeatable dry heat.
- 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 delivers tighter 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 where uniformity and throughput matter. (See the gravity-vs-forced-convection-oven hook.)
Design Architecture
The DKN-303 uses forced circulation with the heater in the airflow path, governed by a microcomputer PID controller (type VS4) reading a K-thermocouple. A front damper trades uniformity (closed) for moisture exhaust (opened). Operation modes include fixed temperature, quick auto-stop, auto-stop, auto-start, and program operation, with lock, auto-recovery after power failure, and calibration-offset functions; calibration offset trims to plus or minus across the full 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 automatic overheating prevention. Construction is a single silicon-packing door with a 0.8 kW iron-chrome heater. This variant is specified for 220 V-nominal single-phase service; because the brochure does not itemize a 220 V rating for the 27 L model, the exact current draw must be confirmed with Yamato.
Frequently Asked Questions
What is the DKN-303's chamber capacity? Approximately 27 L (brochure model DKN302), the entry-capacity, bench-top member of the DKN forced-convection drying-oven family.
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, the reason to pick the DKN family where uniformity and throughput matter.
Is the 220V rating confirmed for this size? Not fully, the brochure itemizes the 27 L model only at 100V AC / 8.5A. Treat the 220V figure as a nominal export configuration and confirm exact current draw and plug type with Yamato at quote.
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.
Confirm at quote: voltage and plug configuration as the priority (this 220V variant is not itemized in the brochure; confirm exact voltage, current draw, and plug type for your service); the application temperature and program profile (target soak ≤ 260 °C and any multi-step recipes); shelf count and load distribution; 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-303-220V, and use the quote to lock down the 220 V electrical specification.
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). The larger members carry the family's documented 200 V single-phase service.
