Technical Data
ComparePoint Level / Liquids
| Measuring Principle | Conductive |
| Characteristic / Application | Compact rod probe with multipoint detection, possible up to 5 switch points. Simple rod shortening. |
| Supply / Communication | DC PNP 10,8V ... 45V Relay 20V ... 230V AC Relay 20V ... 55V DC |
| Ambient temperature | -40 °C ... 70 °C (-40 °F ... 158 °F) |
| Process temperature | -40 °C ... 100 °C (-40 °F ... 212 °F) |
| Process pressure / max. overpressure limit | Vacuum ... 10 bar (Vacuum ... 145 psi) |
| Min. conductivity of medium | 10 µS/cm |
| Main wetted parts | 316L, PP, PPS |
| Max. tensile strength | 1000 N |
| Process connection | G 1 1/2 NPT1 1/2" |
| Sensor length | 0.1m ... 4m (3.9" ... 157") |
| Communication | DC PNP Relay |
| Certificates / Approvals | ATEX, EAC Ex |
| Safety approvals | Leakage Detection |
| Components | Transmitter: FTW325 |
| Application limits | Observe min. medium conductivity |
The FTW31 is a rod-type conductive point level switch; for the cable version use the FTW32.
The Liquipoint FTW31 can be used for point level detection of conductive liquids, with simple and safe measurement. The multi-point detection function (up to 5 probes) gives the Liquipoint FTW31 a wider measuring range.
Benefits
One probe can be used for up to five point level detections
Two-point control with upper and lower limit detection
Flexible use:
1. Rod probe with plug-in electronics, optionally with 2 or 3 transistor or relay outputs;
2. Connection to a separate transmitter power supply unit
No calibration required; suitable for common conductive liquid measurement
No moving parts: - long service life - no wear and blockage, reliable operation
Four selectable measuring ranges: 100 Ω, 1 kΩ, 10 kΩ, 100 kΩ
Economical probe for conductive liquids
Application areas
The Liquipoint T sensor is suitable for point level detection of conductive liquids (10 μS/cm). Depending on the number of measuring points (up to 5 rod probes), tasks such as overflow protection, dry-run protection, two-point pump control and multi-point detection can be performed via the existing process connections.
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Source: public information from the Endress+Hauser website
Case Studies
Municipal Wastewater Treatment — Wastewater Treatment Plant · Conductive 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 Conductive.
Solution
Based on the on-site conditions, the Ainstru technical team selected suitable Conductive 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 · Conductive 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 Conductive.
Solution
Based on the on-site conditions, the Ainstru technical team selected suitable Conductive 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 · Conductive 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 Conductive.
Solution
Based on the on-site conditions, the Ainstru technical team selected suitable Conductive 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 · Conductive 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 Conductive.
Solution
Based on the on-site conditions, the Ainstru technical team selected suitable Conductive 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.
Related Products
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Endress+HauserPump protection sensor FTW360
Endress+Hauser