Pepperl+Fuchs LGC
Level probe
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- Hydrostatic pressure sensor for level measuring of water
- Measuring ranges: 0 bar ... 0.1 bar to 0 bar ... 20 bar
- High-precision and long-term stability ceramic measuring cell
- High mechanical resistance to overload and aggressive media
- Permanent hermetically sealed level probe
- Electronics comprising 4 mA ... 20 mA output signal and integrated overvoltage protection
- Simultaneous level and temperature measuring by optional integrated temperature probe Pt100
- KTW and NSF drinking water approval
Item Number:
LGC
Delivery standard: 3-6 weeks, depending on the country.
Condition: new
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| Measurement range | LGC: - nine fixed pressure measuring ranges in bar, see ordering information - customer-specific measuring ranges, factory-calibrated Pt100 (optional): temperature measurement from -10 ... 70 В°C (263 ... 343 K) |
| Adjustment time | LGC: 150 ms, Pt100 (optional): 300 s |
| Degree of protection | IEC 60529:2001 |
| Output signal | LGC: 4 ... 20 mA for hydrostatic pressure measured value, two-wire Pt100 (optional): temperature-dependent resistance of Pt100 temperature transmitter (optional): 4 ... 20 mA for temperature measured value, two-wire |
| Input signal | LGC: change in capacitance Pt100 (optional): change in resistance temperature transmitter (optional): Pt100 resistance signal, 4-wire |
| Long-term drift | LGC, Pt100 (optional): В± 0.1 % of upper range value (URL) per year temperature transmitter (optional): В± 0.1 K per year |
| Drinking water approval | KTW certificate and NSF approval |
| Degree of protection | LGC, Pt100 (optional): IP68, permanently hermetically sealed, optional terminal box IP66/IP67 temperature transmitter (optional): IP00, moisture condensation permissible, when mounted in the optional terminal boxes IP66/IP67 |
| Influence of medium temperature | - thermal change in zero signal and output span for typical temperature range 0 ... 30 В°C (273 ... 303 K): В± 0.4 % (В± 0.5 %)* of the measuring span - thermal change in zero signal and output span for the total medium temperature range -10 ... 70 В°C (263 ... 343 K): В± 1.0 % (В± 1.5 %)* of the measuring span (Pt100) - temperature coefficient (TK) in zero signal and output span: 0.15 %/10 K (0.3 %/10 K)* of the measuring span (Pt100 and temperature transmitter) *specifications for sensors 0.1 bar and 0.6 bar |
| Material | level probe LGC: 1.4435/316L process ceramic: Al2O3 aluminum oxide ceramic seal (internal): EPDM or Viton protective cap: PE-HD (high-density polyethylene) terminal box LGC-Z11: PC (polycarbonate) temperature transmitter LGC-Z13: housing PC (polycarbonate) extension cable PE: insulation PE (polyethylene), copper wires, twisted extension cable FEP: insulation FEP (fluorinated ethylene propylene), copper wires, twisted |
| Construction type | device with rod probe |
| Measuring method | Level control with ceramic measuring cell (dry measuring cell). The pressure acts directly on the rugged ceramic membrane of the LGC level probe and causes it to move by about max. 0.005 mm. The effects of air pressure on the liquid surface are transferred via a pressure compensating tube through the extension cable to the rear of the ceramic membrane and compensated. Pressure-dependent changes in capacitance caused by membrane movement are measured at the electrodes of the ceramic carrier. The electronics convert the movement into a pressure-proportional signal which is linear to the medium level. |
| Equipment architecture | The measuring system consists of a LGC level probe and a SMART transmitter power supply (e. g. KFD2-STC4-Ex1) with a supply voltage between 10 ... 30 V DC. |
| Dimensions | level probe LGC: Г (optional): -40 ... 100 В°C (233 ... 373 K) |
| Reverse polarity protection | Reverse voltage protection is integrated in LGC level probe and in the temperature transmitter LGC-Z13 changing the polarities has no impact on operation. |
| Connection | 3 terminals in terminal housing as standard 4 terminals in block, accessories LGC-Z15 for conductor cross section 0.08 ... 2.5 mm2 |
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