Xi'an Yunyi Instrument Co., Ltd
Xi'an Yunyiyibiao Instrument Co., Ltd. is a national high-tech enterprise, specializing in the R&D, production and sales of pressure transmitter,level meter, flow , temperature instrument and
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4-20ma Variable Electromagnetic Flowmeter fule Digital Flow Meter
Description 4-20ma Variable Electromagnetic Flowmeter fule Digital Flow Meter
Intelligent electromagnetic flowmeter consists of two parts, the sensor and converter. It is based on the work of Faraday's law of electromagnetic induction, used to measure the conductivity is greater than 5μS / cm conductive liquid volumetric flow rate, is a measure of the volume flow of conductive medium for induction meter.
Parameter 4-20ma Variable Electromagnetic Flowmeter fule Digital Flow Meter
| Nominal Diameter(mm) (Special specifications can be customized) |
pipeline tetrafluoroethylene lining:DN10～DN2600 | |
| Pipeline rubber lining:DN40～DN2600 | ||
| Flow direction: | positive and negative, the net flow | |
| Turndown ratio: | 1500:1 | |
| Repeatability error: |
± 0.1% of measured value
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| Accuracy: | Pipeline:0.5,1.0 | |
| Measured medium temperature: | ordinary rubber lining::－20～＋60℃ | |
| High-temperature rubber lining: －20～＋90℃ | ||
| PTFE lining:－30～＋120℃ | ||
| High temperature tetrafluoroethylene lining:::－20～＋180℃ | ||
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Rated working pressure: (High voltage can be customized) |
DN6－DN80:≤2.5MPa | |
| DN100－DN250:≤1.6MPa | ||
| DN300－DN2600:≤1.0MPa | ||
| Flow rate range: | 0.1－15m/s | |
| Conductivity range: | the measured fluid conductivity≥5μs/cm | |
| Current output: | load resistance | 0～10mA:0～1.5kΩ |
| 4～20mA:0～750 kΩ | ||
| Digital frequency output: |
transistor output frequency limit can be set with optical isolation within 1 ~ 5000HZ bidirectional open-collector output. External power supply is turned ≤35V maximum collector current of 250mA
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| Power supply: | AC220Vor DC24V | |
| Length of straight pipe requirements | upstream≥5DN,downstream≥2DN | |
| Explosion levels | mdIIBT4 | |
| Protection class: | IP65,special order up to IP68 | |
| Ambient temperature: | －25～＋60℃ | |
| Relative humidity: | 5%～95% | |
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Total power consumption:
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less than 20W | |
Select the lining material 4-20ma Variable Electromagnetic Flowmeter fule Digital Flow Meter
Should be based on the measured medium temperature corrosive wear and to select the lining material
| Lining material | corrosion resistance | Working temperature | Application |
| Ne | General resistance to low concentrations of acid salt corrosion | -20～70℃ | lower industrial water effluent pH and salt concentration |
| PO | Has an excellent wear resistance, abrasion resistance slurry dedicated to strong, not decay | -10～60℃ | Liquids containing solid particles (slurry pulp, etc.) |
| FEP |
1 corrosion resistant and quite PTFE 2 high mechanical strength, good wear resistance 3 table smooth, easy adhesion precipitate 4 have strong abrasive media fluid good resistance to outside negative, anti-vacuum effect |
-40～180℃ | except mortar. Like with PTFE can be used for drinks and other health requirements of the media |
| PTFE | lmost all of the corrosion resistant chemical media, poor wear resistance | -40～180℃ | Not be used for pipes and wear strong negative fluid |
Selective Electrode Materials
Should be based on the measured fluid corrosive to select material of the electrodes, check the manual for special fluids should be corrosion test
| Material | Code | corrosion resistance | |
| 316Lstainless steel | V | 1 applies to a neutral solution of industrial, domestic water, raw water wells, urban sewage 2 weak corrosive acids, bases, salts medium such as carbonic acid, acetic acid, etc. |
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| Hastelloy C | HC |
1 applies to anti-oxidizing acids, such as a mixture of nitric acid, mixed acid, chromic acid and sulfuric acid 2 oxidation resistance salt or other corrosive environments, such as the oxidant Fe, Cu 4 NA: hydrochloric acid |
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| Hastelloy B | HB |
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| Titanium | Ti | seawater resistant, various chlorides suddenly hypochlorite and a variety of corrosion hydroxide | |
| Ta | Ta | except hydrofluoric acid, almost all corrosive chemical media capability. But expensive | |
| Platinum | Pt | salt solution applicable to all of the acid (fuming sulfuric acid and nitric acid) | |
| Tungsten | W | has excellent wear resistance, dedicated to the mud, pulp and other abrasive media |