Things to know before you buy ultra low freezer

Ultra low temperature freezers characteristically include a temperature variety of -45C to -86C and are employed for the accumulation of enzymes, drugs, viruses, chemicals, cell preparations, bacteria and tissue samples, amongst others. There are various designs for ultra low temperature freezers with differing sizes based on how much accumulation is required and obtainable footprint gap. For recurrent employment, an upright ULT freezer allows simple access, personal adaptable interior sections, and quick cooling subsequent to opening. A chest ULT freezer gives you secured long-term accumulation for lesser-employed products. Under-bench and Table-top ULT freezers are also present. With detachable inventory stands, an ultra low temperature freezer can be employed to accumulate both freezer boxes and big products. Search for good temperature arrangement in variable voltage situations or excessive ambient temperature, and a variety of temperature controls from easy manual settings to distant electronic checking with alarm arrangements.


In most widespread jargon, ultra-low freezers are containers able to manage an inner temperature of about –80 °C, characteristically by perfunctory ways.

A big university with a veterinary, medical or agricultural school, or a biotechnology or pharmaceutical organization, may have various thousand ULT freezers spread all through the campus in individual labs as well as in central facilities. These are employed to accumulate chemicals, drugs, enzymes, DNA and protein take outs, bacteria, viruses, tissue and cell groundwork, agricultural and environmental tasters, plates, in tubes, bags and different containers developed to endure such cold situations.

In its quintessence, a ULT or ultra low freezer is a very much insulated cupboard fixed with an indication to carry out and keep the heat inside the box down. The most widespread method to achieve this, known as a flow refrigeration system, is to employ a couple of vapor-compression refrigeration arrangements communicating in sequences. The primary takes up heat from the inner side of the cabinet and shifts it to the secondary system, which then shifts the heat to the outer side.

Most upright ULT freezers attribute a sole outer door and various inner doors that may or may not be wadded.

Significant safety tips for hotplate stirrers

Hotplate stirrers, also known as magnetic hotplate stirrers, are adaptable lab amalgamation tools able to operate unattended for various hours. The only poignant part is a revolving magnet in the bottom of the component, the pace of which can be proscribed by the operator.  This creates a covered bar magnet in the amalgamation beaker or container to turn and carry out the amalgamation action.  Stirring speeds as with the heat, based on the model, but can get to 1600 RMP in equipment.

Researchers operating a hotplate stirrer should take steps to decrease unintentional spillage via these two easy steps before filling containers:

  1. Make sure that the container is totally clean
  2. Scrutinize the flask for hairline breaks or scuffs.  Note that scuffs may build up at the layout amid the revolving bar magnet and the inner base of the container or beaker. If any are seen the flask should be redundant.

Magnetic stirrer hot plate is made and developed to expect and respond to conditions that could create a calamity in the laboratory. The attributes are particularly significant when experimentations are done at high temperatures after a long period of time and are generally left unattended by laboratory staff. It initiates with a system-wide verification of all safety task once the component is turned on.  As stirring moves forward response methods involve:

  • A power failure if the hotplate goes beyond involuntary temperature
  • Breakdown of the hotplate temperature antenna
  • Overheated tool housing

Maybe the most significant input to hotplate stirrer safety is an elective Pt100 temperature query which when used correctly takes over operation of the tool.  Submerged at least 2 cm in the taster the query detects and initiates a shutdown in instances including:

  • Breakdown of the query itself because of a cut off or break
  • A striking drop in query-detected heat created by a container leak or taster evaporation under the query tip
  • The hotplate temperature improves, but the query-detected temperature does not
  • Container breakdown – such as a break letting the taster to run away.