The number of channels should be matched with the capacity.
Determine whether the cooling capacity of each channel of the channel chiller can meet the corresponding heat load requirements, and consider the possible future load increase. Select the appropriate number of channels and total cooling capacity.
Temperature range and accuracy you need:
Consider the low and high working temperatures that each channel of the channel chiller needs to reach, as well as the requirements for temperature control accuracy, to ensure that the performance parameters of the chiller meet the application requirements.
Independent temperature control function: 
Multi-channel chiller should have the ability to independently adjust the temperature of each channel to adapt to different experimental or production process conditions.
Compatibility and connection method:
Select the appropriate model of the chiller based on the interface type and size of the equipment to be cooled, and confirm whether the pipeline connection is convenient and whether the medium (such as water or heat transfer oil) is compatible.
Control system and intelligence:
Understand whether the control system of the channel chiller is feasible, and whether it supports remote monitoring, program setting and other functions, to facilitate operation and management.
Protection mechanism:
Ensure that the channel chiller is equipped with various measures such as high and low pressure alarms, overheating protection, and anti-freezing protection to ensure the safety during the equipment operation process.
Maintenance and after-sales service:
Understand the daily maintenance methods of the channel chiller and the after-sales service commitment provided by the supplier, including warranty period, repair response speed and spare parts supply situation.
Installation space and environmental requirements:
Based on the actual layout of the laboratory or production site, select a suitable-sized multi-channel chiller and ensure that there is sufficient ventilation and heat dissipation space around it.
 
In summary, when purchasing a multi-channel chiller, it is necessary to evaluate various technical indicators, safety performance and subsequent service guarantees based on the specific application requirements and conditions.