Prior to this, isolation was only mandatory for people coming into custody from the North-West of the state or where considered appropriate in response to COVID-19 screening questions.

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Corrections Minister Elise Archer said this precautionary response was being taken to minimise the risk of COVID-19 in the state's prisons.

"The Tasmanian Prison Service has developed an isolation strategy that allows the appropriate housing of prisoners of all security classifications by using existing infrastructure," Mr Archer said.

Ms Archer said it was recognised physical isolation could have a negative impact on a prisoner's health and wellbeing and a range of measures had been put in place to monitor this.

"Isolated prisoners will still be able to maintain contact with their families and social supports by mail and telephone, and in some cases also by virtual visits," she said.

"They will also be offered a range of materials and equipment to keep them engaged and active."

In response to the pandemic, over the next week the TPS will also install fixed non-contact temperature scanners at entry points to all TPS facilities to improve detection of persons who may be infected with COVID-19.

"Once the devices are installed, anyone entering TPS facilities will be required to submit to a non-contact temperature scan before they are permitted entry," Ms Archer said.

"Anyone whose temperature exceeds 38 degrees Celsius will be denied entry and instructed to seek medical advice.

"Where a person has been denied entry, they will not be permitted to return to a TPS facility until they have received written clearance from a medical practitioner."