| 摘要 |
A detector (100), such as a gas or flame detector, having a housing which provides protection against explosion and/or ingress, which detector comprises at least one temperature sensor, a heating and/or cooling element (14) and at least one heat pipe (7, 8, 9) connected between a first and a second part of the detector, the arrangement being such that, in use, said temperature sensor provides an output signal indicating a temperature of a part of said at least one heat pipe (7, 8, 9), and which output signal is used to control said heating and/or cooling element (14) to warm or cool said at least one heat pipe, whereby the temperature at each of said first and second parts of the detector may be maintained substantially the same. |
