Digital flow meter for heating ventilation air conditioning Item No.：DG-EFM004MOQ：1 pcApplication:√ Central air-conditioning√ Heating industry√ Heat exchanger unitAdvantages:√ ?No pressure loss, the measurement is not affected by temperature、pressure and other changes.√ ?A heat insulation device between the transducer and the sensor to prevent the transfer of temperature√ Dual current output or double pulse output (positive and negative flow rate respectively) can be selected.√ The BACnet communication protocol can be selected.√ ?Excellent low flow rate measurement performance with a 400:1 turndown ratio√ The four-electrode structure is suitable for the installation and measurement of various process pipelines, including plastic pipes, fluoride-lined pipes and cement pipes, etc., without the need for another grounding ring.√ Reliable empty pipe detection technology√ ?Five-segment nonlinear correction function√ ?Both the power supply and the output circuit adopt reliable lightning protection and surge protection, with high reliability and low fault.√ ?The measurement is stable and the stability is excellentPerformance parameters：■ Accuracy grade: 0.25 and 0.5■ Repeatability: ±0.1% of measured value■ Response time: the maximum 0.3 milliseconds relative to the input change.■ Stability: the stability over 6 months is ±0.1% of measured value?■ Impact of ambient temperature: ±0.25% over operating temperature range ■ Impact of the installation location: the installation is not affected as long as the sensor can be fully charged and enough straight sections are ensured before and after■ Startup time: it takes 50 milliseconds to start from zero flow■ Preheating time: it takes 15 minutes from power supply to rated measurement accuracySensor parameters:Nominal diameter3/8 inch to 32 inch ( DN10 to DN800 )The measured fluid conductivity requirements≥ 5 μS/cmTemperature range of the measured fluid- 29 to 150 ℃ (PTFE lining); -29 to 80 (rubber lining); -29 to 180 (PFA lining)Body materialSUS304 stainless steelFlange material and shellcarbon steel, SUS304 stainless steel (optional)Shell coatinganti-corrosion polyester paintLining materialPTFE, neoprene, PFA and polyurethane linings, etc.Electrode material316L, Hastelloy B2/C276, Titanium, Tantalum, Platinum, Tungsten Carbide, etc.Process connectionDIN PN10 to PN250 ; ANSI Class 150 / class 300; JIS10 /JIS20KExcitation coil impedanceMaximum 115 ohmsSensor protection levelIP65、IP68Converter parameters:Ambient temperature range- 20 to 149 of (- 29 to 65 ℃)Shell materiallow copper die-casting aluminum (standard), or stainless steel material converter shellPowerAC 86 to 265V, 50/60HZ, 1A fast fuse insurance; DC 16V to 36V, 1A fast fuse insuranceOutput4-20 mA output, pulse or frequency outputCommunication protocolRS485 communication, Hart protocol and Profibus-DP protocol can be selected.Protection levelIP65Correction10-segment nonlinear correctionLCD displayshowing instantaneous flow, ?total volume, flow rate, etc.Excitation currentThree amplitude excitation technology,excitation current 250mAElectrical Interface2 PG13.5Power10 wattsFlow measurement range http://www.meterschina.com/flow-meter/electromagnetic-flow-meter/digital-flow-meter.html