... , papermaking, electric power, environmental protection and so forth. 2. Special Features- zero pressure losing;- Corrosion protection, abrasion ... Standard pressure: PN1.0MPa~40MPa;- Accuracy: ±0.5%~±1.0%;- Supply power: 85 to 250VAC (45 to 63Hz ... Output: Upper Alarm-ALMH, Lower Alarm-ALML with photoelectric isolation;- Communications: RS-232, RS-485,Hart, MODBUS. Electromagnetic Flow Meter