Model Number: FX3D Brand Name: DOTECH INC. Key Specifications/Special Features: 1. Main features:- Heating/cooling output- Independent timer output- High/low limit alarm- Defrost output- Sensor calibration- Sensor error detection- Automatic output cycle after sensor error- Minimum on/off duration time2. Models:

FX3D-00: Basic model
FX3D-R4: Add on RS485 communication (Modbus)
FX3D-A1: Add on 4 to 20mA transmission output
FX3D-A1R4 : Add on 4 to 20mA transmission output and RS485 communication (Modbus)