The Yamato DH-412 is a 91 L forced-air-circulation "fine oven" with high-accuracy temperature control to 360 °C and ±0.2 °C adjustment accuracy. The high-temperature counterpart to the DF-412, the Yamato DH-412 circulates uniformly heated air horizontally for precision uniformity at elevated temperature, with full program operation (up to 99 steps / 99 patterns). It is a capital fine oven for precision heat treatment up to 360 °C.
Key Specifications
| Spec | Value |
| Model (focus) | Yamato DH-412 (brochure model DH412) |
| Circulation method | Forced air circulation and ventilation |
| Operating temperature range | Room temp +15 °C to 360 °C |
| Temperature adjustment accuracy | ±0.2 °C (at 360 °C) |
| Temperature distribution accuracy | ±2.5 °C (at 360 °C) |
| Max temp. reaching time | ~50 min (reaches 360 °C at a 370 °C setting) |
| Temp control / setting | PID Z control / digital with ▲▼ keys |
| Display | Green 4-digit LED (reading), orange 5-digit LED (setting) |
| Operation functions | Fixed temperature, auto-start, auto-stop, program (max 99 steps / 99 patterns, repeat) |
| Additional functions | Variable air-flow, power/CO₂/heat monitoring, calibration offset, power-failure recovery, data backup |
| Sensor | Double K-thermocouple |
| Heater / control | Stainless pipe heater with fan / Triac zero-cross; 2.7 kW |
| Blower fan | Axial-flow fan (capacitor motor, 20 W) |
| Exhaust / cable port | Automatic exhaust damper I.D. 80 mm / cable port I.D. 33 mm (rear) |
| Earth leakage breaker | 20 A (rated current sensitivity 30 mA) |
| Internal dimensions (W×D×H) | 450 × 450 × 450 mm |
| External dimensions (W×D×H) | 1050 × 630 × 850 mm |
| Chamber capacity | 91 L |
| Shelf load / support / pitch | ~30 kg/shelf / 9 steps / 45 mm |
| Power source | AC 220V, 15.5 A, single phase (no plug, round terminal) |
| Weight | ~112 kg |
| Included | 2 shelves / 4 brackets |
| Compatible accessories | Stand OP43 (415464) / OP46 with casters (415466); SS-wire shelf ODQ10 (211063, 30 kg); SS-punching shelf ODQ30 (211098); SS-mesh shelf ODT12 (212924); stacking support ODF48 (213700); sheath K-sensor ODT48 (212946) |
Application Profile
The 91 L DH-412 is built for precise heat treatment at elevated temperature — polymer and coating cure, materials conditioning, drying and baking, and any process needing a tightly held setpoint up to 360 °C. Forced air circulation in a horizontal flow pattern holds ±2.5 °C distribution at 360 °C, and the automatic exhaust damper allows quick venting and cooling of the chamber between stages. An independent overheat-prevention circuit (settable 0–400 °C on DH models) backs up high-temperature operation.
Why the Yamato DH-412 extends fine-oven precision to 360 °C
The DH-412 is the DF-412's high-temperature sibling: it keeps forced-convection precision (±0.2 °C adjustment, ±2.5 °C uniformity) but a larger 2.7 kW heater and higher independent-overheat setpoint let it hold 360 °C. That 100 °C of extra headroom is the reason to choose DH over DF; if your process stays at or below 260 °C, the DF-412 is the more economical choice. (See gravity-vs-forced-convection-oven.)
Frequently Asked Questions
What temperature range does the Yamato DH-412 reach? Room temperature +15 °C to 360 °C, with ±0.2 °C adjustment accuracy and ±2.5 °C distribution accuracy at 360 °C.
Is the DH-412 forced-air or natural convection? Forced air circulation and ventilation — a fan circulates heated air horizontally for high uniformity even at 360 °C.
Is it programmable? Yes. It supports program operation up to 99 steps or 99 patterns with repeat, plus fixed-temperature, auto-start, and auto-stop modes.
How is it different from the DF-412? Same 91 L forced-air fine oven, but the DH-412 reaches 360 °C (vs 260 °C) using a 2.7 kW heater (vs 2.1 kW).
What power supply does it need? Single-phase AC 220V, 15.5 A, supplied without a plug (round-terminal connection) — hard-wiring to a suitable 220 V circuit is required.
How large is the chamber? 91 L (450 × 450 × 450 mm internal), with 9 shelf positions at 45 mm pitch and shelves rated ~30 kg each.
Ordering & Configuration
quote-based. The DH-412 is a capital forced-convection fine oven sold through a quote. At quote we confirm the single-phase 220 V circuit and round-terminal connection (no plug supplied), your process temperature and program profile within 360 °C, shelving type and stand/caster options, and floor space for the 1050 × 630 × 850 mm cabinet plus exhaust routing. Warranty terms are confirmed with the quote, and lead time is provided at quotation. Request a quote to configure the DH-412.
DF/DH 412/612 fine-oven series: DH-412 (91 L, 360 °C, this unit) / DH-612 (216 L, 360 °C) and DF-412 (91 L, 260 °C) / DF-612 (216 L, 260 °C). Pick DH for 360 °C work and DF for 260 °C; pick 412 for bench-scale 91 L and 612 for 216 L throughput. Step to the 3-phase DF/DH 832/1032 for large chambers or the DH-650Z for 500 °C.
