High Accuracy Coolant Tester. Why Choose Our High Accuracy Coolant Tester?. Your Essential Tool for 6/12/24V Battery Systems. Manufacturer Part Number: Coolant Tester Unit Quantity: 2.82 ounces OBD Interface: CAN,EOBD,OBD,OBDII Supported System: ABS,DPF,EPB,SAS,SRS,TPMS.