1. H04DT and H32DT have the same shell size and the appearance is delicate.
2. H04DT has four channels of temperature and humidity input,it can be used to accurately measure temperature and humidity within 200 meters.
3. H32DT has thirty-two channels of temperature and humidity input,it can be used to accurately measure temperature and humidity within 500 meters.
4. Both of them can be used as extend modules for any host PLC, but H32DT has its own RS485 communication port which can be used as a remote I/O module.
5. The power supply is simple, H04DT uses host plc power supply, H32DT use host plc power supply or independent external power supply of DC24V.
6. The acquired temperature value is of high precision and of low cost.
7. H32DT can be used for temperature measurement in a wide range, for example, the industrial environment like coal mining, tunnel, etc.