Elsys ELT-2

The ELT-2 have the capability of solving almost any problem. It is enclosed in an IP67 box which makes it ideal for mounting outside or in extreme conditions. The ELT-2 can measure both analog or digital signals and can handle up to two external sensors simultaneously.  

Not only can you connect external sensors to the ELT-2, but it also has four internal sensors: temperature sensor, humidity sensor, accelerometer, and an atmospheric pressure sensor.