TDR sensor for continuous level and interface measurement of liquids

Rated 3.31 out of 5 based on 26 customer ratings
(53 customer reviews)
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SKU: VEGAFLEX 81 Categories: ,


Cable, rod or coaxial sensor. Even in applications with steam, buildup, foam or condensation, the sensor delivers precise and reliable readings – also in standpipes or bypass pipes.

The VEGAFLEX 81 level sensor measures maintenance-free all kind of liquids. Even in applications with vapour, buildup, foam generation and condensation, the sensor delivers precise and reliable measured values. The VEGAFLEX 81 is the economical solution for various level and interface measurements.

Your benefit

  • The guided adjustment enables a simple, time-saving and reliable setup
  • Shortenable probes offer a simple standardisation and highest flexibility in the planning
  • Comprehensive diagnostic possibilities ensure a maintenance-free operation and hence a high plant availability
Technical specifications
Measuring range – Distance
75 m
Process temperature
-60 … 200 °C
Process pressure
-1 … 40 bar
± 2 mm
Basic version for exchangeable cable ø 2; ø 4 mm
Basic version for exchangeable rod ø 8 mm
Basic version for exchangeable rod ø 12 mm
Coax version ø 21.3 mm for ammonia application
Coax version ø 21.3 mm with single hole
Coax version ø 21.3 mm with multiple hole
Coax version ø 42.2 mm with multiple hole
Exchangeable rod ø 8 mm
Exchangeable rod ø 12 mm
Exchangeable cable ø 2 mm with gravity weight
Exchangeable cable ø 4 mm with gravity weight
Exchangeable cable ø 2 mm with centering weight
Exchangeable cable ø 4 mm with centering weight
Exchangeable cable ø 4 mm without weight
exchangeable, PFA-coated cable ø4 mm with non-coated centering weight
Materials, wetted parts
Alloy C22 (2.4602)
Alloy 400 (2.4360)
Alloy C276 (2.4819)
Duplex (1.4462)
Threaded connection
≥ G¾, ≥ ¾ NPT
Flange connection
≥ DN25, ≥ 1″
Seal material
Silicone FEP coated
Borosilicate glass
Housing material
Stainless steel (precision casting)
Stainless steel (electropolished)
Protection rating
IP 66/IP 68 (0.2 bar)
IP 66/IP 67
IP 66/IP 68 (1 bar)
Profibus PA
Foundation Fieldbus
4 … 20 mA/HART – two-wire
4 … 20 mA/HART – four-wire
Ambient temperature
-40 … 80 °C
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