The model acon md-01 is the seven segment display with modbus communication.
The model THI-02 is a TEMPERATURE/HUMIDITY INDICATOR WITH ALARM for TEMPERATURE.
The model DI-02 is a DIGITAL TEMPERATURE / HUMIDITY INDICATOR with facility of average TEMP and RH value indication for last 24 Hrs. This unit also gives o/p of 2-10 V for each Temp and RH input.