ELECALL electromagnetic flowmeters measure conductive liquids in water treatment, chemical processing, electroplating wastewater, textile dyeing, pulp and slurry systems. The unobstructed measuring tube has no moving parts, keeping pressure loss low. A backlit dot-matrix LCD displays flow data and provides access to configuration menus.
Integrated, split and insertion arrangements are available. The illustrated flanged integrated meter uses reinforced lining construction, copper excitation coils and protected electronics. Select electrode and lining materials for the liquid, concentration and temperature, then specify the installation, power supply and output configuration.
| Parameter | Specification |
|---|---|
| Measuring medium | Conductive liquids, including water, wastewater, chemical liquids, pulp and slurry |
| Accuracy | ±0.5%FS |
| Published overall flow range | 0-9999.99m³/h; actual operating range depends on sensor size and configuration |
| Turndown ratio | 150:1 |
| Reference nominal sizes | DN15-250; see the individual dimension and flow rows below |
| Working pressure options | 1.6MPa, 4MPa, 16MPa |
| Engineering pressure options | 0.6MPa, 1.0MPa, 1.6MPa, 4.0MPa; higher pressure configurations can be customized |
| Operating temperature | Rubber lining ≤60°C; PTFE lining ≤120°C |
| Supply configurations | 220VAC, 24VDC, 12VDC; optional lithium battery, including a 3.6V battery-pack configuration |
| Analog and serial options | 4-20mA, 0-10mA, RS485, RS232; Modbus, HART and Profibus configurations |
| Pulse and frequency options | Pulse volume 0.001L-1m³ in the product specification; the converter manual provides a programmable 0.001-10000L pulse-volume range and 0-10000Hz frequency output |
| Electrode options | 316L stainless steel, Hastelloy B, Hastelloy C, tantalum, platinum-iridium alloy, tungsten carbide; titanium and platinum are included in the material-selection guide |
| Lining options | Neoprene, PTFE/F4, F46/FEP, PFA, polyurethane |
| Process connection | Flange as standard; threaded or quick-clamp connection can be customized |
| Display and controls | Backlit dot-matrix LCD; four keys; Chinese or English menus |
Supply, pressure and output choices are configuration options. The size-specific flange ratings below apply to the reference dimensions; a general high-pressure option does not change the rating of every listed flange.
A is the outside flange diameter, L is the face-to-face length, and n-Ø identifies mounting-hole count and diameter. Dimensions are in mm.
| DN | A | L | Pressure (MPa) | Holes n-Ø |
|---|---|---|---|---|
| 15 | 95 | 200 | 1.6 | 4-14 |
| 20 | 105 | 4-16 | ||
| 25 | 115 | 4-18 | ||
| 32 | 150 | |||
| 40 | 165 | 4-20 | ||
| 50 | 185 | 4-22 | ||
| 65 | 200 | 4-24 | ||
| 80 | 220 | 8-24 | ||
| 100 | 285 | 250 | 8-26 | |
| 150 | 300 | 8-28 | ||
| 200 | 340 | 350 | 8-24 | |
| 250 | 395 | 450 | 1.0 | 12-26 |
Values are volume flow in m³/h at the stated velocity. This geometric conversion table helps compare nominal sizes; it does not define the accuracy-qualified measuring range at every velocity. No DN32 flow row is specified.
| DN | 0.01m/s | 1m/s | 2m/s | 3m/s | 4m/s | 5m/s | 15m/s |
|---|---|---|---|---|---|---|---|
| 15 | 0.0064 | 0.6362 | 1.2723 | 1.9085 | 2.5447 | 3.1809 | 9.5426 |
| 20 | 0.0113 | 1.1310 | 2.2619 | 3.3929 | 4.5239 | 5.6549 | 16.9646 |
| 25 | 0.0177 | 1.7671 | 3.5343 | 5.3014 | 7.0686 | 8.8357 | 26.5072 |
| 40 | 0.0452 | 4.5239 | 9.0478 | 13.5717 | 18.0956 | 22.6195 | 67.8584 |
| 50 | 0.0707 | 7.0686 | 14.1372 | 21.2058 | 28.2743 | 35.3429 | 106.0288 |
| 65 | 0.1195 | 11.9459 | 23.8918 | 35.8377 | 47.7836 | 59.7295 | 179.1886 |
| 80 | 0.1810 | 18.0956 | 36.1911 | 54.2867 | 72.3823 | 90.4779 | 271.4336 |
| 100 | 0.2827 | 28.2743 | 56.5487 | 84.8230 | 113.0973 | 141.3717 | 424.1150 |
| 150 | 0.6362 | 63.6173 | 127.2345 | 190.8518 | 254.4690 | 318.0863 | 954.2588 |
| 200 | 1.1310 | 113.0973 | 226.1947 | 339.2920 | 452.3803 | 565.4867 | 1696.4600 |
| 250 | 1.7671 | 176.7146 | 353.4292 | 530.1438 | 706.8583 | 883.5729 | 2650.7188 |
| Material | Chemical-service guidance |
|---|---|
| Molybdenum stainless steel, 0Cr18Ni12Mo2Ti | Nitric acid; sulfuric acid below 5% at room temperature; boiling phosphoric acid; acetic acid; alkali solutions; sulfurous acid under specified pressure conditions; seawater |
| Hastelloy C / Hastelloy B, HC / HB | Grade-dependent selection for oxidizing acids and salts, seawater, nonoxidizing acids and salts, alkalis and sulfuric acid at room temperature |
| Titanium, Ti | Seawater, chlorides, hypochlorites, oxidizing acids including fuming nitric acid, organic acids and alkalis |
| Tantalum, Ta | Broad chemical resistance, including boiling hydrochloric and nitric acids and sulfuric acid below 175°C; excludes hydrofluoric acid, fuming sulfuric acid and alkalis |
| Platinum, Pt | Acids, alkalis and salts; excludes aqua regia |
Choose the individual alloy for the actual concentration and temperature. Material compatibility alone does not raise the complete flowmeter's operating-temperature rating.
| Lining | Properties | Applications and material reference temperatures |
|---|---|---|
| Neoprene | High elasticity, tear strength and abrasion resistance; resists ordinary acid and alkali concentrations; unsuitable for oxidizing media | Water, wastewater, mud and ore slurry. Generic material guide lists 80°C and 120°C without configuration assignments. |
| PTFE / F4 | Chemical resistance to boiling hydrochloric, sulfuric and nitric acids, aqua regia, concentrated alkalis and organic solvents | Strongly corrosive and hygienic media; generic material range -40°C to 180°C |
| Polyurethane | Abrasion resistance described as approximately ten times natural rubber; poor acid and alkali resistance | Neutral abrasive ore and coal slurries; material guide specifies below 80°C |
| F46 / FEP | Chemical properties similar to F4; improved resistance to negative pressure; higher price | Applications as for F4; no independent temperature value supplied |
| Mesh-reinforced PFA | Chemical properties similar to F4; excellent resistance to negative pressure; higher price |
Instrument temperature limits: use rubber lining at ≤60°C and PTFE lining at ≤120°C for the stated instrument. The higher generic material reference values in the selection guide are not ratings for the assembled flowmeter.
The four-key converter supports forward and reverse measurement, low-flow cutoff, excitation and empty-pipe alarms, totalizers and five-point flow correction. Its settings are summarized below; the English operation manual provides complete key sequences, terminal assignments and calibration procedures.
| Menu group | Setting | Available values or function |
|---|---|---|
| Measurement | Pipe diameter | 3-3000mm; fine adjustment ±0 to ±99mm. This is converter configuration capability, not sensor-size availability. |
| Damping | 0-99s | |
| Flow units | L/h, L/min, L/s, m³/h, m³/min, m³/s, t/h, t/min, t/s, kg/h, kg/min, kg/s, GPM | |
| Flow decimal places | Automatic or manual; manual 0-3 places | |
| Totalizer units | 0.001m³, 0.01m³, 0.1m³, 1m³; 0.001L, 0.01L, 0.1L, 1L; 1t, 1kg, GAL | |
| Range | Set upper flow limit; lower limit is zero | |
| Excitation frequency | 1/8 of mains frequency | |
| Fluid density | Set the fluid density | |
| Functions | Direction | Forward or reverse |
| Reverse measurement | Enable or disable | |
| Reverse output | ||
| Apply cutoff to display | ||
| Low-flow cutoff | Set as percentage of instrument range | |
| Instrument alarms | Enable or disable all alarm indications | |
| Excitation alarm | Enable or disable | |
| Empty-pipe alarm | ||
| Empty-pipe threshold | Adjust using the empty-pipe ratio with a full pipe | |
| Modbus | Address | 001-255; 0 reserved |
| Baud rate | 300, 600, 1200, 2400, 4800, 9600, 19200, 38400 | |
| Parity | None, odd or even | |
| Output | Type | Pulse or frequency |
| Pulse polarity | Positive or negative | |
| Volume per pulse | 0.001-10000L converter setting | |
| Pulse width | 0.1-100ms | |
| Frequency | 0-10000Hz output; adjustable full-scale frequency 1-10000Hz | |
| System | Language | Chinese or English |
| Restore factory settings | Restore saved factory parameters | |
| Save factory settings | Save factory parameters | |
| LCD contrast | Adjust contrast | |
| Backlight | On or off | |
| Backlight timeout | 1, 5, 10, 30 or 60 minutes; any key restores the backlight | |
| Forward total preset | Set forward cumulative total | |
| Reverse total preset | Set reverse cumulative total | |
| Clear total | Reset cumulative flow | |
| Password display | View passwords subject to access level | |
| Password setting | Set the current access-level password; three levels | |
| Calibration | Flow zero correction | Set zero with a full pipe and stationary fluid |
| Sensor factor | Enter calibrated sensor factor | |
| Sensor factor calculation | Enter reference flow for automatic factor calculation | |
| Converter normalization | Factory adjustment | |
| Piecewise correction units | m³/h, m³/min, m³/s, kg/h, kg/min, kg/s, t/h, t/min, t/s, GPM, m/s, L/h, L/min, L/s | |
| Correction points 1-5 | Five pairs of measured flow correction point and reference flow | |
| Piecewise correction enable | Enable for the correction entries to take effect |
Keep the measuring tube full. Install in a low section of horizontal pipe or in upward flow, avoiding the highest point and vertical downward-flow sections. For open discharge, locate the sensor in the lower pipe section. Where the downstream drop exceeds 5m, fit an air-release valve downstream of the sensor.
Place the flowmeter on the pump outlet side. Provide at least 10D of straight pipe upstream and 5D downstream, where D is the internal meter diameter. Set the flow direction, range, output type and communication parameters for the receiving system. Use the English operation manual for active or passive current-output wiring, pulse-output DIP settings and zero calibration.
