The Yamato IN-604-115V is a programmable low-temperature (refrigerated) incubator with a 143 L stainless chamber that holds a stable setpoint anywhere from −5 °C to +50 °C — below, at, or above ambient — using a full-closed mechanical refrigeration circuit paired with an iron-chrome heater. Forced-circulation airflow and PID control give ±0.3 °C adjustment accuracy with the refrigerator in continuous operation, making it suited to BOD testing, cell and microbial culture near ambient, and long-run stability studies. This is the 115V variant; the 220V sibling is the IN-604-220V.
Key Specifications
| Model / capacity | Yamato IN604 — 143 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. 30 min |
| Time to lowest temp | 20 → −10 °C in approx. 55 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, 250 W |
| Cooling medium | R134a, 310 ±5 g |
| Heater | Iron-chrome, 550 W |
| Sensor | Platinum resistance bulb (Pt100Ω) |
| Interior / insulation | Stainless steel; expanded polystyrene (non-fluorocarbon) |
| Inner door | Tempered glass, 5 mm thick |
| Defrost | Manual ON / automatic OFF, cycle operation |
| Shelves | 3 stainless punching-metal shelves; 15 kg/shelf; 13 bracket steps at 30 mm |
| Cable port | Inner diameter 30 mm (right side) |
| Internal dimensions | 600 × 477 × 500 mm (W×D×H) |
| External dimensions | 710 × 645 × 913 mm (W×D×H) |
| Weight | Approx. 93 kg |
| Power supply | 115V, 50/60 Hz (spec sheet: AC100V, 13 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.
The IN-604 reaches ±0.3 °C adjustment accuracy and ±1.0 °C distribution at 37 °C with the refrigerator running continuously, which is the mode to select when uniformity matters more than energy use; a cycle mode trades tighter control (±1.0 °C) for reduced compressor duty. 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. A 32-step programmable profile supports multi-stage ramp-and-hold work such as germination or thermal-cycling regimes.
Frequently Asked Questions
What temperature range does the IN-604 cover? It holds any setpoint from −5 °C to +50 °C, spanning sub-ambient refrigerated incubation through warm-incubation setpoints.
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 (both measured no-load at ~23 °C ambient).
How long does it take to reach temperature? Approximately 30 minutes to climb from 20 °C to 50 °C, and about 55 minutes to pull down from 20 °C to −10 °C.
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.
How is frost managed? Via a manual-ON / automatic-OFF defrost with cycle operation; the evaporator can be checked through the frost inspection window, and defrost is run when frost accumulates.
What ships with it? Three stainless punching-metal shelves, six shelf brackets, and the instruction manual. Optional items include RS485 external communication, an RS-232C adapter, temperature/alarm/time-up output terminals, a hybrid recorder, an extra shelf set, and a stand for the IN604.
Ordering & Configuration
Add to quote or cart for a formal quotation. At quote we confirm supply voltage (this is the 115V SKU; order IN-604-220V for 220 V), continuous-vs-cycle operating mode for your uniformity target, any communication/recorder outputs, and lead time.
At ~93 kg and 710 × 645 × 913 mm, plan a stable, ventilated bench or stand location with clearance for the air-cooled condenser. Warranty: per Yamato standard capital-equipment terms — confirmed at quote.
Yamato IN604 refrigerated incubator, 143 L:
- IN-604-115V (this product) — 143 L, 115V
- IN-604-220V — 143 L, 220V
- Step up to the IN-804 (286 L) when a larger chamber or divided-glass inner door is needed.
