1. temperature indicator 2. CE,CQC,ISO9001 3. Retransmission 4. 4loops of alarms 5. Various dimensions selectable YUDIAN AI-500 ... ~5V,0~100mv,0~20mv, 0~60mVLinear Current: 0~20mA, 4~20mALinear resistor: 0~80ohm, 0~400ohm-9990~3000 defined by ... .Operating Ambient : temperature -10~60°C; humidity ≤90%RH3.Ordering code:4. Why us ?YUDIAN is of over 20 years experience of ...