The British Made low cost 6500 therma-hygrometer measures both relative humidity and air temperature. The instrument displays %rh over the range of 0 to 100%rh with a resolution of 0.1 %rh and temperature over the range of -20 to 70 °C with a resolution of 0.1 °C.

The therma-hygrometer incorporates a clear custom LCD with °C, %rh, max/min, hold and dew point indication. An auto power-off facility turns the instrument off after 10 minutes non-use.

The 6500 therma-hygrometer incorporates four, easy to use, push buttons allowing the user to select on/off, °C/°F, max/min and mode functions. Each unit is supplied with a remote sensor and integral PVC lead.