Low-Temperature BOD Incubator

What is the Low-Temperature BOD Incubator?

A low-temperature BOD incubator reaches below 20 C, often to 0 or 5 C, for incubation methods that need colder conditions. It is chosen for cold BOD variants and low-temperature sample holding.

Overview

This incubator extends the BOD chamber to lower setpoints, from about 0 or 5 C up to 60 C, using a larger refrigeration system and careful insulation. It supports cold BOD variants and other methods incubated below 20 C, such as certain microbial or enzyme studies, and provides reliable sample holding at 4 to 10 C. Uniformity of plus or minus 0.5 to 1 C is kept across the range, though gradients widen near 0 C, and defrost is scheduled to avoid excursions. Door heaters and heated frames prevent condensation and frost. Chambers run 100 to 400 liters, and controllers may be digital or programmable with logging. It suits environmental laboratories with varied incubation requirements and research needing cold, dark incubation.

How does it work?

A BOD incubator maintains a fixed setpoint, commonly 20 C, with compressor refrigeration and heating under PID control, so it holds temperature whether the room is warmer or cooler. Forced-air circulation keeps uniformity within plus or minus 0.5 to 1 C across the chamber, and a door heater or heated frame prevents condensation at the fixed low temperature. The interior is dark, since light can affect samples and encourage algae, and shelves or racks hold BOD bottles or other vessels. Defrost cycles are scheduled to avoid temperature excursions during the five-day test, and many models include a timer or chart for the incubation period. Alarms warn of temperature deviation, and some units log temperature continuously so a valid test can be demonstrated.

What are the key features?

• Extended range from about 0 to 60 C
• Reliable holding at 4 to 10 C
• Larger refrigeration system for low setpoints
• Door heaters and heated frames against frost
• Scheduled defrost to avoid excursions
• Digital or programmable control with logging

What are the technical specifications?

A typical low-temperature bod incubator configuration offers chamber volume of 100–400 L, temperature range of 0–60 C, set at 5–20 C, temperature uniformity of ±0.5–1 C, temperature stability of ±0.5 C, cooling system of Compressor, larger capacity and defrost of Automatic or scheduled. Values are indicative of the product class; the exact figures for each configuration are confirmed on the quotation and the calibration documents supplied with the instrument.

Which applications is it used for?

The Low-Temperature BOD Incubator is used in cold BOD method variants, sample holding at 4 to 10 C, low-temperature microbial and enzyme studies and environmental sample preservation. Across the wider BOD Incubators class, laboratories also deploy it for five-day BOD determination in water and wastewater, biochemical oxygen demand method training and influent and effluent monitoring.

Which standards and certifications apply?

Relevant standards and methods include IEC 61010-1, IEC 61010-2-010, DIN 12880, APHA 5210, ISO 5815-1 and ISO 9001. Certification candidates for this model are CE, ISO 9001 manufacturing and RoHS; each is to be confirmed for the specific configuration before shipment, and certificates are supplied only where they have been issued.

Place the incubator in a ventilated location with clearance for the condenser and door swing, away from heat sources and direct sunlight. Keep the interior dark and do not open the door during the incubation other than at defined checkpoints, since temperature recovery may alter the result. Verify the temperature at the working setpoint with a calibrated probe, and log it continuously where the method requires evidence. Clean spills promptly and disinfect as needed, taking care not to scratch the interior or leave residues that affect samples. Check the condenser, gaskets and door heater during scheduled service, and record all maintenance.

How do I select the right Low-Temperature BOD Incubator?

Select the low-temperature BOD incubator when methods need setpoints below 20 C or when the same unit must also hold samples at 4 to 10 C. Standard BOD models are simpler and cheaper if only 20 C is required. In the RFQ, specify lowest setpoint, cooling capacity, uniformity at that point and logging needs.

How does it compare with other BOD Incubators variants?

Choose a BOD incubator when a method specifies incubation at a fixed low temperature, most often the 20 C five-day BOD test, and when the laboratory needs to show that temperature was held. Set the required temperature and tolerance, then check uniformity at that point rather than a midpoint. Match chamber volume to bottle count and to the use of racks or shelves. Confirm defrost behaviour, since ice build-up or regular defrost cycles can disturb the incubation. Decide whether programmable control, dual chambers or temperature logging are needed for compliance. Check door type, alarms, data output and refrigerant type before ordering.