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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Technical documentation
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Source:Endress+Hauserwebsite public information
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Case Studies
Municipal Wastewater Treatment — Wastewater Treatment Plant · Static Pressure Measurement Application Case
Project Background
Municipal Wastewater Treatment customers at the Wastewater Treatment Plant stage have long faced the challenge of insufficient accuracy in effluent quality monitoring and instruments prone to contamination causing data drift, affecting compliance discharge, placing higher demands on the stability and measurement accuracy of Static Pressure Measurement.
Solution
Based on the on-site conditions, the Ainstru technical team selected suitable Static Pressure Measurement for the customer and delivered one-stop service covering selection, installation, commissioning and tuning.
Results
- Measurement accuracy and response speed significantly improved, with stable and reliable data;
- Instruments adapt to complex Municipal Wastewater Treatment conditions, greatly reducing maintenance;
- Helping customers achieve continuous online monitoring and cost reduction, highly recognized by customers.
Food & Beverage — Food Production Line · Static Pressure Measurement Application Case
Project Background
Food & Beverage customers at the Food Production Line stage have long faced the challenge of high hygienic measurement requirements, with inline instruments needing to withstand CIP/SIP cleaning while maintaining stable accuracy, placing higher demands on the stability and measurement accuracy of Static Pressure Measurement.
Solution
Based on the on-site conditions, the Ainstru technical team selected suitable Static Pressure Measurement for the customer and delivered one-stop service covering selection, installation, commissioning and tuning.
Results
- Measurement accuracy and response speed significantly improved, with stable and reliable data;
- Instruments adapt to complex Food & Beverage conditions, greatly reducing maintenance;
- Helping customers achieve continuous online monitoring and cost reduction, highly recognized by customers.
Chemical & Pharmaceutical — Reactors and Storage Tanks · Static Pressure Measurement Application Case
Project Background
Chemical & Pharmaceutical customers at the Reactors and Storage Tanks stage have long faced the challenge of highly corrosive media and complex conditions, requiring corrosion-resistant and explosion-proof instruments, placing higher demands on the stability and measurement accuracy of Static Pressure Measurement.
Solution
Based on the on-site conditions, the Ainstru technical team selected suitable Static Pressure Measurement for the customer and delivered one-stop service covering selection, installation, commissioning and tuning.
Results
- Measurement accuracy and response speed significantly improved, with stable and reliable data;
- Instruments adapt to complex Chemical & Pharmaceutical conditions, greatly reducing maintenance;
- Helping customers achieve continuous online monitoring and cost reduction, highly recognized by customers.
Power & Energy — Power Plant Boiler and Turbine · Static Pressure Measurement Application Case
Project Background
Power & Energy customers at the Power Plant Boiler and Turbine stage have long faced the challenge of unstable measurement under high temperature and pressure, with high maintenance and downtime costs, placing higher demands on the stability and measurement accuracy of Static Pressure Measurement.
Solution
Based on the on-site conditions, the Ainstru technical team selected suitable Static Pressure Measurement for the customer and delivered one-stop service covering selection, installation, commissioning and tuning.
Results
- Measurement accuracy and response speed significantly improved, with stable and reliable data;
- Instruments adapt to complex Power & Energy conditions, greatly reducing maintenance;
- Helping customers achieve continuous online monitoring and cost reduction, highly recognized by customers.
