Technical Data
CompareContinuous / Liquids
| Measuring Principle | Hydrostatic |
| Characteristic / Application | Compact probe with ceramic cell for hydrostatic level measurement, Diameter = 22 mm: General applications, Fresh water Diameter = 42 mm: Waste water applications Diameter = 29 mm: Salt water applications |
| Specialities | Automatic density compensation Version w/o metal parts in contact to process |
| Supply / Communication | 10.5 ...35 VDC |
| Accuracy | 0.2% 0.1% (optional) |
| Long term stability | 0.1% of URL/year |
| Ambient temperature | -10°C...70°C (14°F...158°F) Diameter 29 mm (1.14"): 0°C...50°C (32°F...122°F) |
| Process temperature | -10°C...70°C (14°F...158°F) Diameter 29 mm (1.14"): 0°C...50°C (32°F...122°F) |
| Pressure measuring range | 100 mbar...20 bar (1.5 psi...300 psi) |
| Main wetted parts | Diameter 22 mm and 42 mm: Seal, 316L, Ceramic Diameter 29 mm: Seal, PPS, Polyolefin, Ceramic Extension cable: PE, PUR, FEP |
| Process connection | Suspension clamp Cable mounting screws |
| Max. measurement distance | 200 m H2O (656 ft H2O) |
| Communication | 4...20 mA 4...20 mA HART |
| Certificates / Approvals | ATEX, FM, CSA, CSA C/US, IEC Ex, NEPSI |
| Marine approval | GL/ ABS/ BV/ DNV/ LR |
| Drinking water approvals | KTW/ NSF/ ACS |
| Options | Absolute measuring cell Integrated temperature sensor Pt100, 4-wire customer specific adjustment customer specific cable marking |
| Application limits | Measuring cell: ceramics |
Pressure
| Measuring Principle | Hydrostatic pressure |
| Characteristic | Compact probe with ceramic cell for hydrostatic level measurement, Diameter = 22 mm: General applications, fresh water Diameter = 42 mm: Waste water applications Diameter = 29 mm: Salt water applications |
| Supply voltage | 10.5 ...35V DC |
| Reference Accuracy | 0.2% 0.1% (optional) |
| Long term stability | 0.1% of URL/year |
| Process temperature | -10°C...70°C (14°F...158°F) Diameter 29 mm (1.14"): 0°C...50°C (32°F...122°F) |
| Ambient temperature | -10°C...70°C (14°F...158°F) Diameter 29 mm (1.14"): 0°C...50°C (32°F...122°F) |
| Measuring cell | 100mbar...20bar (1.5psi...300psi) |
| Process connection | Suspension clamp Cable mounting screws |
| Communication | 4...20 mA 4...20 mA HART |
| Certificates / Approvals | ATEX, FM, CSA, CSA C/US, IEC Ex, INMETRO, NEPSI, UK Ex |
| Marine approvals | GL/ ABS/ BV/ DNV/ LR |
| Drinking water approvals | NSF/ KTW/ ACS |
The Waterpilot FMX21 transmitter uses an oil-free capacitive ceramic measuring cell for hydrostatic level measurement in the process industry and the environmental sector. With HART output, a freely adjustable measuring range and automatic density compensation, it increases level measurement accuracy. It is approved for drinking water measurement and offers built-in temperature measurement. Application versions for wastewater and sludge measurement are also available.
Advantages
High-purity ceramic sensor (99.9% Al2O3) with strong overload resistance
4...20 mA with superimposed HART 6.0 output
Automatic density compensation for improved measurement accuracy
Built-in Pt100 temperature sensor (optional) for simultaneous level and temperature measurement
A wide range of accessories provides complete measuring point solutions
Fully sealed electronics and dual-filter pressure compensation system protect the sensor from climatic influences
Small 22 mm (0.87“) outside diameter version suitable for drinking water applications and small-diameter measurement locations such as pumping and deep wells
Areas of application
Three different versions for drinking water, wastewater and sewage, and salt water respectively.
Process connection: suspension clamp, cable gland
Temperature: -10...+ 70°C (14...158°F)
Measuring range: 0...20 bar / 200m H2O (0...300 psi / 600ft H2O)
Accuracy: ±0.2%, platinum version: ±0.1%
International explosion protection approval, marine approval, drinking water approval
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Source:Endress+Hauserwebsite public information
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