The Yamato DX-402C is the 74 L mid-capacity model of the DX natural-convection drying-oven family, a constant-temperature gravity-convection oven with a maximum control range of 40–300 °C. The Yamato DX-402C roughly triples the chamber of the 28 L DX-302C while keeping the same fan-free gravity airflow and rotating exhaust damper, making it a practical general-purpose drying oven for busier benches. It sits between the 28 L and 153 L family members.
Key Specifications
| Spec | Value |
| Model (focus) | Yamato DX-402C (brochure model DX402) |
| Type | Natural-convection constant-temperature drying oven |
| Temperature control range | 40–300 °C |
| Temperature control accuracy | ±1 °C (at 300 °C, exhaust port fully open) |
| Temperature distribution accuracy | ±10 °C (at 300 °C, exhaust port fully open) |
| Temperature rise time | Approx. 60 min (ambient to 300 °C) |
| Exhaust port | Rotating damper, avg. 20 % opening when closed |
| Heater | Iron-chrome heater, 1.36 kW |
| Control system | PID heater control by microcomputer |
| Setting method | Digital, up/down keys |
| Operation modes | Fixed temperature, quick auto-stop, auto-stop, auto-start |
| Sensor | K-thermocouple |
| Internal dimensions (W×D×H) | 450 × 410 × 400 mm |
| External dimensions (W×D×H) | 550 × 540 × 730 mm |
| Chamber volume | 74 L |
| Weight | Approx. 38 kg |
| Power supply | 100V AC, 14 A, 50/60 Hz (US nominal 115 V) |
| Included | 2 shelves (15 kg/shelf load), instruction manual, warranty card |
Application Profile
The 74 L DX-402C suits general laboratory drying at higher throughput, batches of glassware, samples, and prepared media, plus curing of coatings and adhesives and dry-to-constant-weight gravimetric prep below 300 °C. Its natural-convection design moves air without a fan, so it disturbs light samples and powders less than a forced-convection oven and produces fewer airborne particulates.
Why the Yamato DX-402C fits gravity-convection work
The rotating exhaust damper trades uniformity for moisture removal, closed for a stable soak, opened to vent evolved moisture during drying. Gravity convection accepts a wider distribution band (±10 °C at 300 °C) and slower recovery in exchange for gentle airflow; where tighter uniformity is required, a forced-convection oven is the better fit. (See the gravity-vs-forced-convection-oven guide.)
Frequently Asked Questions
What temperature range does the Yamato DX-402C reach? Its control range is 40–300 °C, with ±1 °C control accuracy at 300 °C (exhaust port fully open).
How large is the chamber? The DX-402C offers a 74 L chamber measuring 450 × 410 × 400 mm internally, with two 15 kg-rated shelves.
Is this a forced-air (fan) oven? No. It is a natural-convection (gravity) oven; moisture is vented through a rotating exhaust damper rather than a fan.
What voltage does it use? The DX402 base model is rated 100V AC, 14 A (US nominal 115 V). The 220 V sibling is the DX-412C.
How long does it take to heat up? Approximately 60 minutes from ambient to 300 °C.
Ordering & Configuration
quote-based. The DX-402C is a capital drying oven sold through a quote. At quote we confirm bench service and plug configuration (this 115 V-nominal unit maps to the brochure's 100 V / 14 A rating), target soak temperature, shelf count and loading, and the 550 × 540 × 730 mm footprint with exhaust routing. Warranty terms are confirmed with the quote, and lead time is provided at quotation. Request a quote to configure the DX-402C for your drying or curing workflow.
DX natural-convection family (capacity ladder): DX-302C/312C (28 L) → DX-402C/412C (74 L, this unit) → DX-602C/612C (153 L). Choose the DX line for gentle gravity-convection drying; step up to the programmable DVS series for multi-step ramp/soak recipes, or to a forced-convection oven when tighter uniformity matters.
