Non-Contact Earth Resistance On-line Detector, on-line monitoring of grounding resistance and metal loop coupling resistance, grounding condition monitoring 1. Model No.: ETCR2800B 2. Test Mode: Non-contact type 3. Communication Mode: RS485 or GPRS communication (optional) 4. Resistance Range: 0.01Ω~200Ω; 5. Accuracy: ±2%rdg±3dgt(20℃±5℃,Below70%RH) 6.Power Supply: 6VDC~12VDC, 50mA Max.