... Flow Meter Accuracy: 0.5% to 1% Communications: RS-232, RS-485,Hart, MODBUS BF-LDH Series Electromagnetic Flow Meter1 ... 63Hz), 16 to 36VDC;- Signal output: Current Output: 0~10mA or 4~20mA;- Frequency Output: 0~5000Hz with photoelectric isolation ... Output: Upper Alarm-ALMH, Lower Alarm-ALML with photoelectric isolation;- Communications: RS-232, RS-485,Hart, MODBUS. Electromagnetic Flow Meter ...