|  | HT-4X Series II Vacuum Evaporator"The earlier HT-4 model tended to require regular maintenance and draining prior to final drying. This later upgrade facilitates draining." 5 July 2008 | - Ease of use4 out of 5
- After sales service3 out of 5
- Value for money4 out of 5
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|  | Explorer®"Earlier models were unreliable but this has now been sorted out." 3 July 2008 | - Ease of use5 out of 5
- After sales service5 out of 5
- Value for money4 out of 5
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