Choosing The Right Laboratory Incubator

Choosing the Right Laboratory Incubator:

A Lesson in Ambient Temperature

When purchasing a benchtop incubator, most users focus on setpoint accuracy and uniformity. However, one critical factor is often overlooked: the ambient temperature of the laboratory itself. A recent inquiry from a laboratory customer highlights why this parameter can make or break your selection.

The Customer's Requirement

The user needed a compact temperature‑controlled chamber to maintain 27 °C with ±0.5 °C tolerance for routine sample incubation. On paper, this seems straightforward – many standard incubators offer that precision. But the real challenge lies in how the equipment achieves that temperature relative to its surroundings.

Initial Recommendation: A Heating‑Only Model

Based on the initial enquiry, we proposed our ALP‑DHP‑9022 benchtop incubator. Its specifications are attractive:

Temperature range: RT+5 ~ 65 °C

Accuracy: ±0.5 °C

Digital microprocessor control with timer function

Mirror‑finished stainless steel interior

Double‑door design with inner glass door for observation

At first glance, this unit appears ideal. The key, however, is understanding what "RT+5" means – RT stands for Room Temperature, i.e., the ambient air in the laboratory. The lowest achievable chamber temperature is always 5 °C above the current room temperature. So if your lab is at 22 °C, you can set 27 °C perfectly. But if the lab warms up, that window closes.

The Missing Piece: Real Lab Conditions

When we explained this principle, the customer responded with vital data: their laboratory is air‑conditioned to 24 °C, but it can fluctuate between 23 and 25 °C depending on the season. This seemingly small variation completely changed the equipment suitability.

At 24 °C ambient, the heating‑only DHP‑9022 can only reach a minimum of 29 °C – that is 2 °C above the required 27 °C. Even at 23 °C, the minimum is 28 °C. Clearly, this model would never meet the customer's specification, regardless of its precision.

The Correct Solution: A Refrigerated Biochemical Incubator

To achieve 27 °C when ambient is 23‑25 °C, the incubator must be able to cool below ambient. We therefore recommended the ALP‑SPX‑50 Biochemical Incubator (BOD Incubator), which includes a built‑in refrigeration system.

1. Understand "RT" specifications – RT+5 is not an absolute value; it depends entirely on your ambient conditions. Always ask what the actual room temperature is and how much it fluctuates.
2. Map your environment year‑round – Air conditioning helps, but seasonal changes can shift temperatures by a few degrees. If your setpoint is close to or below ambient, you need a refrigerated unit.
3. Choose the right technology – Heating‑only incubators are perfectly adequate when the target temperature is at least 5 °C above the maximum ambient. For applications near or below room temperature, a cooling‑capable model is non‑negotiable – it ensures consistent performance throughout the year.

A seemingly simple requirement – 27 °C at ±0.5 °C – became a valuable lesson in environmental awareness. The initial recommendation would have been a costly mistake if not for the customer's candid room‑temperature data. By switching to a refrigerated incubator, we provided a solution that not only meets the specification but also offers extra versatility for future low‑temperature applications.

At ALP Technology, we believe in matching equipment to real‑world conditions, not just paper specs. Whether you need heating‑only or refrigeration‑equipped incubators, we have the right model for your lab.

For personalized advice, contact us today – we are here to help you choose wisely and avoid hidden pitfalls.

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