Close

Contact form

Telephone consultation

You’d like to talk with an expert? You’re looking for the ideal sensor for your requirements? Then call us. We’ll be glad to help you select the right instrument.

You’ll be connected with your VEGA consultant via our switchboard:

+1 513 2720131

Service hotline

If you need service, feel free to call our 24-hour hotline, available seven days a week. Only normal call charges are incurred:

+49 1805 85 85 50


VEGA Americas service line

For assistance during normal business hours, call:

+1 844-VEGA-NOW (834 2669)

+1 800-367-5383 (Toll free)

VEGAFLEX 81

TDR sensor for continuous level and interface measurement of liquids

VEGAFLEX 81
VEGAFLEX 81

Application area

All kind of liquids, applications with vapour, buildup, foam or condensation

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 data

Measuring range - Distance
75 m
Process temperature
-60 ... 200 °C
Process pressure
-1 ... 40 bar
Accuracy
± 2 mm
Version
  • 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
  • PFA
  • 316L
  • Alloy C22 (2.4602)
  • Alloy 400 (2.4360)
  • Alloy C276 (2.4819)
  • Duplex (1.4462)
  • 304L
Threaded connection
≥ G¾, ≥ ¾ NPT
Flange connection
≥ DN25, ≥ 1"
Seal material
  • EPDM
  • FKM
  • FFKM
  • Silicone FEP coated
  • Borosilicate glass
Housing material
  • Plastic
  • Aluminium
  • 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)
Output
  • Profibus PA
  • Foundation Fieldbus
  • 4 … 20 mA/HART - two-wire
  • Modbus
  • 4 … 20 mA/HART - four-wire
Ambient temperature
-40 ... 80 °C

Configurator

Configure product

VEGA Recommends

PLICSCOM with Bluetooth

Provides access to configure the sensor, and visualize the measured value right at the sensor housing. This can be ordered as part of the model code of the sensor or as a separate item.

Product details
PLICSCOM now with Bluetooth!

Application Data Sheet

Download and complete an Application Data Sheet to send to your VEGA contact so that we can recommend the most beneficial solution for your application.

Application Data Sheet

Download and complete an Application Data Sheet to send to your VEGA contact so that we can recommend the most beneficial solution for your application.

The ace for level measurement and interface measurement in all liquids

The VEGAFLEX 81 guided radar sensor is exceptional when it comes to measuring the level or interface of liquids. Guided radar is extremely versatile and can be found in almost every industrial sector. Whether bitumen or liquefied gas, in storage containers or standpipes, in a metering tank or in tank farms – VEGAFLEX 81 measures the level or interface (separation layers) of liquids with great reliability and accuracy.

Guided radar delivers reliable measurements data for control or safety systems for

  • Level measurement in ammonia storage tanks
  • Level measurement in standpipes
  • Interface measurement in storage tanks, bypass tubes, standpipes

Product configuration

Configure product

Documentation & Software

appropriate to VEGAFLEX 81

Accessories

appropriate to VEGAFLEX 81

PLICSCOM

Measured value indication and adjustment of plics® sensors

Protection rating
IP 20/IP 40
Ambient temperature
-15 ... 70 °C

Bluetooth USB adapter

Wireless adjustment of sensors and instruments via Bluetooth

Version
Bluetooth Smart
Ambient temperature
-40 ... 85 °C
Forecast
Forecast

VEGADIS 81

Remote measurement value indication and adjustment of plics® sensors

Housing material
Plastic
+2 other
Protection rating
IP 66/IP 67
Ambient temperature
-20 ... 70 °C

VEGADIS 82

External measured value display and adjustment for 4 ... 20 mA/HART sensors

Housing material
Plastic
+2 other
Protection rating
IP 66/IP 67
Ambient temperature
-20 ... 70 °C

VEGADIS 176

Remote display for use in 4 ... 20 mA current loop

Protection rating
IP 20/IP 65
Ambient temperature
-10 ... 60 °C

Magnetic pen for display/adjustment module PLICSCOM

Magnetic pen for on-site adjustment

VEGAMET 381

Measured value display and simple control functions

Protection rating
IP 20/IP 40
Input
1 x 4 … 20 mA sensor input
Output
1 x 0/4 … 20 mA current output
+2 other

VEGAMET 391

Measured value indication, simple control functions, remote enquiry of measured data. optimized for water/sewage water industry

Protection rating
IP 20/IP 65
Input
1 x 4 … 20 mA/HART sensor input
+1 other
Output
1 x 0/4 … 20 mA current output
+3 other

VEGAMET 624

Measured value indication, simple control functions such as remote enquiry of measured values for a 4 ... 20 mA/HART sensor

Protection rating
IP 20/IP 30
Input
with transmitter power supply
+1 other
Output
1 x fail safe relay
+4 other

VEGAMET 625

Measured value indication, simple control functions such as remote enquiry of measured values for two HART sensors

Protection rating
IP 20/IP 30
Input
2 x 4 … 20 mA/HART sensor input with transmitter power supply (only HART capable sensors)
Output
1 x fail safe relay
+4 other

VEGASCAN 693

Measured value indication and remote enquiry of measured data for up to 15 HART sensors

Protection rating
IP 20/IP 30
Input
up to 15 HART-capable sensors
+1 other
Output
1 x fail safe relay
+2 other

VEGATOR 141

Transmission of 4 ... 20 mA signals for level signalling

Protection rating
IP 20
Input
1 x 4 … 20 mA sensor input
Output
1 x operating relay (SPDT)
+1 other

VEGATOR 142

Transmission of 4 ... 20 mA signals for level signalling

Protection rating
IP 20
Input
2 x 4 … 20 mA sensor input
Output
2 x operating relay (SPDT)

VEGATRENN 141

Single channel separator for 4 … 20 m/HART sensors

Protection rating
IP 20
Input
1 x 4 … 20 mA/HART sensor input
Output
1 x 4 … 20 mA

VEGATRENN 142

Double channel separator for 4 … 20 m/HART sensors

Protection rating
IP 20
Input
2 x 4 … 20 mA sensor input
Output
2 x 4 ... 20 mA

VEGATRENN 151

Single channel separator in two-wire technology for 4 … 20 mA sensors

Protection rating
IP 20
Input
1 x 4 … 20 mA/HART sensor input
Output
1 x 4 … 20 mA

VEGATRENN 152

Double channel separator in two-wire technology for 4 … 20 mA sensors

Protection rating
IP 20
Input
2 x 4 … 20 mA sensor input
Output
2 x 4 ... 20 mA

Overvoltage protection B 81-35

Pluggable overvoltage protection for supply and signal cables

Process temperature
-40 ... 85 °C
Output
4 … 20 mA/HART
+4 other

Overvoltage protection B 63-32

Overvoltage protection for Profibus PA and Foundation Fieldbus circuits

Protection rating
IP 66
Ambient temperature
-40 ... 85 °C

Overvoltage protection B 63-48

Overvoltage protection for two-wire circuits

Protection rating
IP 66
Ambient temperature
-40 ... 85 °C

Overvoltage protection B 62-30 W

Overvoltage protection for Profibus PA and Foundation Fieldbus circuits

Housing material
Plastic
+1 other
Protection rating
IP 20/IP 65
Ambient temperature
-40 ... 60 °C

Overvoltage protection B 62-36 G

Overvoltage protection for two-wire circuits

Housing material
Plastic
+1 other
Protection rating
IP 20/IP 65
Ambient temperature
-40 ... 60 °C

VEGACONNECT

Interface adapter between PC and VEGA instruments

Housing material
Plastic
Protection rating
IP 40
Ambient temperature
-20 ... 60 °C

VEGABOX 03

Protection rating
IP 66/IP 68 (0.2 bar)
Ambient temperature
-20 ... 70 °C

Ethernet switch

up to 8 RS45 pluggable

Protection rating
IP 20

Profibus PA/DP segment coupler

Simple segment coupler for up to 93.75 kbit/s DP-side

Protection rating
IP 20
Ambient temperature
-20 ... 60 °C

G1½ threaded adapter for VEGAFLEX 80 and VEGAPULS 64

VEGAFLEX series 80 cable and rod components

VEGAFLEX series 80 probe extensions

VEGAFLEX series 80 spacers

Spacers or centering weights fix the measuring probe in the middle of the tube.

VEGAFLEX series 80 centering/gravity weights

FLEX80 tensioning facility for cable version of FLEX81, FLEX86

Electronics VEGAFLEX serie 80

Process component VEGAFLEX 81