The Yamato IN-804-115V is a programmable low-temperature (refrigerated) incubator with a 286 L stainless chamber that holds any setpoint from −5 °C to +50 °C — below, at, or above ambient — using a full-closed mechanical refrigeration circuit and a 750 W iron-chrome heater. Forced-circulation airflow and PID control deliver ±0.3 °C adjustment accuracy with the refrigerator in continuous operation, giving high-throughput labs the sub-ambient capacity for BOD testing, culture near ambient, and long-run stability work. This is the 115V variant; the 220V sibling is the IN-804-220V.
Key Specifications
| Model / capacity | Yamato IN804 — 286 L |
| Circulation method | Forced circulation (axial fan) |
| Temperature control range | −5 °C to +50 °C |
| Adjustment accuracy | ±0.3 °C (refrigerator continuous); ±1.0 °C (cycle operation) |
| Distribution accuracy | ±1.0 °C (at 37 °C, refrigerator continuous) |
| Time to highest temp | 20 → 50 °C in approx. 55 min |
| Time to lowest temp | 20 → −10 °C in approx. 90 min |
| Control system | PID by microcomputer; programmable, 32 steps |
| Setting / display | Digital up/down keys; orange LED display |
| Operation modes | Fixed temp, auto-start, auto-stop, program (32 steps, repeat) |
| Refrigerator | Air-cooled full-closed reciprocating compressor, 300 W |
| Cooling medium | R404A, 260 ±5 g |
| Heater | Iron-chrome, 750 W |
| Sensor | Platinum resistance bulb (Pt100Ω) |
| Interior / insulation | Stainless steel; expanded polystyrene (non-fluorocarbon) |
| Inner door | Tempered glass, 5 mm thick (divided upper and lower) |
| Defrost | Manual ON / automatic OFF, cycle operation |
| Shelves | 5 stainless punching-metal shelves; 15 kg/shelf; 23 bracket steps at 30 mm |
| Cable port | Inner diameter 30 mm (right side) |
| Internal dimensions | 600 × 477 × 1000 mm (W×D×H) |
| External dimensions | 710 × 645 × 1630 mm (W×D×H) |
| Weight | Approx. 120 kg |
| Power supply | 115V, 50/60 Hz (spec sheet: AC100V, 14 A, 15 A breaker) |
Application Profile
A refrigerated incubator differs from a heat-only incubator in one decisive way: an active compressor lets it hold setpoints at or below room temperature without drifting up as the lab warms during the day. That capability is what BOD (biochemical oxygen demand) protocols at 20 °C, insect and plant-tissue rearing, enzyme and reagent stability studies, and low-temperature microbial culture depend on — none can be met by a heat-only unit that can only servo upward from ambient. At 286 L the IN-804 roughly doubles the IN-604's capacity for labs running many plates or vessels in parallel.
The IN-804 reaches ±0.3 °C adjustment accuracy and ±1.0 °C distribution at 37 °C with the refrigerator running continuously, the mode to select when uniformity matters more than energy use; a cycle mode trades tighter control (±1.0 °C) for reduced compressor duty. Its divided upper/lower tempered-glass inner door lets you inspect or access one zone while limiting heat and cold loss from the other. Because the interior is SUS304 stainless, avoid strong acids and halide-releasing samples, and — as the manual stresses — space samples apart and use the shelves rather than packing the chamber, since a crowded load defeats the forced-circulation uniformity the design provides.
Frequently Asked Questions
What temperature range does the IN-804 cover? It holds any setpoint from −5 °C to +50 °C, spanning sub-ambient refrigerated incubation through warm-incubation setpoints.
How large is the chamber? The internal volume is 286 L (600 × 477 × 1000 mm), served by five stainless punching-metal shelves rated 15 kg each across 23 bracket steps.
How accurate and uniform is it? Adjustment accuracy is ±0.3 °C with the refrigerator in continuous operation, and temperature distribution is ±1.0 °C at 37 °C (measured no-load at ~23 °C ambient).
How long does it take to reach temperature? Approximately 55 minutes to climb from 20 °C to 50 °C, and about 90 minutes to pull down from 20 °C to −10 °C — the larger mass takes longer than the IN-604.
Can it run unattended multi-step programs? Yes — PID microcomputer control supports 32-step programming with repeat, plus fixed-temperature, auto-start, and auto-stop modes.
What ships with it? Five stainless punching-metal shelves, ten shelf brackets, and the instruction manual. Optional items include RS485 external communication, an RS-232C adapter, temperature/alarm/time-up output terminals, and a hybrid recorder.
Ordering & Configuration
Add to quote or cart for a formal quotation. At quote we confirm supply voltage (this is the 115V SKU; order IN-804-220V for 220 V), continuous-vs-cycle operating mode for your uniformity target, any communication/recorder outputs, and lead time.
At ~120 kg and 710 × 645 × 1630 mm, this is a floor-standing unit — plan a stable, ventilated location with clearance for the air-cooled condenser and door swing. Warranty: per Yamato standard capital-equipment terms — confirmed at quote.
Yamato IN804 refrigerated incubator, 286 L:
- IN-804-115V (this product) — 286 L, 115V
- IN-804-220V — 286 L, 220V
- Step down to the IN-604 (143 L) when bench footprint matters more than capacity.
