This sensor is specifically designed for applications where there is only limited space is present. It measures relative humidity and temperature present in air and also other gases that are non-aggressive. It is not recommended to use this device for outdoor applications. The device follows the technology of miniature sensors used in the calHT series. The sensor comes with a filter and a 4-pin plug. It can also remain permanently connected to a 1.5 m long cable. These cables are available in different lengths. The device is durable and offers accurate dynamic performance. It also provides small hysteresis.