Temp-max transmitter from pyrotech electronics pvt ltd is more reliable than conventional temperature scanners. This accepts up to 6 rtd inputs, selects highest for local display of temperature, and gives a corresponding 4-20 ma optical and galvanic isolated output on 4-wire 230 v ac version. The company also offers 2-wire 24 v dc versions. These are very effective for control and measurement of bearing winding temperatures of ht motors. As the analogue circuitry and temperatures of all channels are read and compared at the same time there is no false tripping. Abs of ip-65 class is used to make the housing of 2-wire version temp-max. Cast aluminium of ip-65 class is used to make housing of 4-wire version temp-max. It has input/output isolation and lead resistance compensation facilities. Wiring cost of this temp-max is too low. These instruments have been tested for high voltage test, insulation resistance test, dry heat test, cold test, dump test and vibration test at national laboratories.
