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.
