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38

5 Mounting

VEGAPULS 6X • Two-wire 4 … 20 mA/HART

66190-EN-221107

Fig. 37: Radar sensors on traverse crane

The separating walls in multi-chamber silos are often constructed 

from trapezoidal sheets to ensure the required stability.

Note:

If the radar sensor is mounted too close to such a separating wall, 

»ÇÆËÁ¼½Ê¹ºÄ½ÁÆ̽ʾ½ÊÁƿʽŴ½»ÌÁÇÆËŹÑÇ»»ÍÊƖǹÎÇÁ¼ÌÀÁËƓÌÀ½

sensor should be installed at the greatest possible distance from the 

separating walls.
The optimal installation of the device is therefore on the outer wall of 

the silo. The sensor should be directed towards the emptying point in 

the centre of the silo. This can be done, for example, using the mount-

ing strap.

Fig. 38: Installation and orientation in multiple chamber silos

Mounting in multiple 

chamber silo

Содержание VEGAPULS 6X

Страница 1: ...Operating Instructions Radar sensor for continuous level measurement of liquids and bulk solids VEGAPULS 6X Two wire 4 20 mA HART Document ID 66190 ...

Страница 2: ...ctions 15 5 2 Housing features 15 5 3 Mounting preparations mounting strap 18 5 4 Mounting versions plastic horn antenna 19 5 5 Mounting instructions 21 5 6 Measuring rigs bypass 40 5 7 Measurement setup Flow 42 6 Connecting to power supply 45 6 1 Preparing the connection 45 6 2 Connecting 46 6 3 Wiring plan single chamber housing 47 6 4 Wiring plan double chamber housing 48 6 5 Wiring plan versio...

Страница 3: ...odule 91 12 2 VEGA Tools app and PACTware DTM 94 12 3 Special parameters 99 13 Set up with other systems 102 13 1 DD adjustment programs 102 13 2 Field Communicator 375 475 102 14 Diagnosis asset management and service 103 14 1 Maintenance 103 14 2 Measured value and event memory 103 14 3 Asset Management function 104 14 4 Echo curve 108 14 5 Rectify faults 114 14 6 Exchanging the electronics modu...

Страница 4: ...s 142 17 4 Industrial property rights 160 17 5 Licensing information for open source software 160 17 6 Trademark 160 Safety instructions for Ex areas à ÆÇÌ Ç ÌÀ Ð ËÈ ÁŲ Ë ÌÑ ÁÆËÌÊÍ ÌÁÇÆË ÇÊ Ð ÈÈÄÁ ÌÁÇÆËƖ These instructions are attached as documents to each instrument with Ex approval and are part of the operating instructions Editing status 2022 10 26 ...

Страница 5: ... Docu ment ID By entering the Document ID on www vega com you will reach the document download Information note tip This symbol indicates helpful additional infor mation and tips for successful work Note This symbol indicates notes to prevent failures malfunctions damage to devices or plants Caution Non observance of the information marked with this symbol may result in personal injury Warning Non...

Страница 6: ...omplying with all prevailing regulations and directives The instrument must only be operated in a Ì ÀÆÁ ÄÄÑ Ŵ ÏÄ ËË Æ Ê ÄÁ ºÄ ÇÆ ÁÌÁÇÆƖ À ÇÈ Ê ÌÇÊ ÁË Ê ËÈÇÆËÁ ble for the trouble free operation of the instrument When measuring aggressive or corrosive media that can cause a dangerous situation if the instrument malfunctions the operator has to implement suitable measures to make sure the instrument...

Страница 7: ...tutes a violation of the regulations of the radio approvals of the respective country 2 6 Installation and operation in the USA and Canada This information is only valid for USA and Canada Hence the follow ing text is only available in the English language Installations in the US shall comply with the relevant requirements of the National Electrical Code ANSI NFPA 70 Installations in Canada shall ...

Страница 8: ...ooth unlock code Device code Emergency device code Documentation Quick setup guide VEGAPULS 6X Instructions for optional instrument components ÐƘËÈ ÁŲ ͷ Safety instructions with Ex versions Safety Manual with SIL version Radio licenses Æ ËË ÊÑƓ ÍÊÌÀ Ê ÊÌÁŲ Ì Ë Information Optional instrument features are also described in this operating instructions manual The respective scope of delivery results ...

Страница 9: ... the instrument 5 4 3 2 1 Fig 2 Layout of the type label example 1 Device type order code radar frequency 2 Field for approvals product code 3 Technical data 4 QR code for VEGA Tools app 5 Reminder to observe the instrument documentation 6 Field for conformity logos The type label contains also the serial number of the instrument With ÁÌ ÑÇÍ Æ ŲÆ ÌÀ ÇÄÄÇÏÁÆ ÁÆËÌÊÍÅ ÆÌ Ì ÇÆ ÇÍÊ ÀÇÅ È ƕ Product info...

Страница 10: ... The VEGAPULS 6X is a radar sensor for continuous level measure Å ÆÌ Ç ÄÁÉÍÁ Ë Ë Ï ÄÄ Ë ºÍÄà ËÇÄÁ Ë ÍÆ Ê ÁŰ Ê ÆÌ ÈÊÇ ËË ÇÆ Á tions À ÁÆËÌÊÍÅ ÆÌ ÁË Î ÁÄ ºÄ ÏÁÌÀ ÁŰ Ê ÆÌ ÆÌ ÆÆ ËÑËÌ ÅËƕ 1 2 3 4 5 6 Fig 3 Antenna systems VEGAPULS 6X 1 Plastic horn antenna 2 Thread with integrated antenna system 3 Flange with encapsulated antenna system ˁ Ñ Á ÆÁ ŲÌÌÁÆ 5 Horn antenna 6 Flange with lens antenna The instr...

Страница 11: ...erability without tools Devices with integrated Bluetooth module can be adjusted wirelessly via standard adjustment tools Smartphone tablet iOS or Android operating system PC notebook Windows operating system 1 3 2 Fig 4 Wireless connection to standard operating devices with integrated Bluetooth LE 1 Sensor 2 Smartphone Tablet 3 PC Notebook Devices with signal output 4 20 mA HART can also be opera...

Страница 12: ...t must be carried out in due consideration of the notes on the transport packaging Nonobservance of these instructions can cause damage to the device The delivery must be checked for completeness and possible transit damage immediately at receipt Ascertained transit damage or con cealed defects must be appropriately dealt with Up to the time of installation the packages must be left closed and sto...

Страница 13: ...IS 81 is an external display and adjustment unit for VEGA plics sensors VEGADIS 82 is suitable for measured value indication and adjustment of sensors with HART protocol It is looped into the 4 20 mA HART signal cable The PLICSMOBILE T81 is an external GSM GPRS UMTS radio unit for transmission of measured values and for remote parameter adjust ment of HART sensors Welded sockets are used to connec...

Страница 14: ... mm 7 87 Connection technology Wiring plan 5 6 7 8 4 20mA Display 1 2 Display and adjustment module VEGA Tools app 2 Liquids Bulk solids Enter medium type application vessel height adjustment and mode 100 0 0 5 m 19 68 5 m 196 9 100 0 1 m 39 37 35 m 1378 Indicators Output Prepare Mount and connect sen sor Select adjustment Parameterize sensor Check measured value 2 Download via Apple App Store Goo...

Страница 15: ...ËƖ ÇÍ Æ ŲÆ Ì ÁÄ ÁÆ ÇÊÅ ÌÁÇÆ ÇÆ the process conditions in chapter Technical data of the operating instructions or on the type label Hence make sure before mounting that all parts of the instrument ex posed to the process are suitable for the existing process conditions These are mainly Active measuring component ÊÇ ËË ŲÌÌÁÆ Process seal Process conditions in particular are Process pressure Process ...

Страница 16: ...e chamber stainless steel single chamber precision cast ing 4 Stainless steel single chamber electropolished 5 Plastic double chamber 6 Aluminium stainless steel double chamber housing precision casting Information For devices in protection class IP66 IP68 1 bar ventilation is pro ÎÁ ºÑ ÈÁÄÄ ÊÑ ÁÆ ÌÀ ŲÐ ºÄ Ɩ Æ ÌÀ Ë ÎÁ ËƓ ºÄÁÆ ÈÄÍ ÁË ÁÆËÌ ÄÄ ÁÆ ÌÀ ÀÇÍËÁÆ ÁÆËÌ Ç ÌÀ ŲÄÌ Ê Ä Å ÆÌƖ The housing of VEGAP...

Страница 17: ...son please also observe the notes on polarisation in chapter Mounting instructions With the aluminium and stainless steel housing precision casting the housing cover can be secured with a screw This protects the device against unauthorised opening of the cover 3 2 1 1 Fig 8 Position of the safety screw depending on housing 1 Safety screw 2 Aluminium stainless steel single chamber housing precision...

Страница 18: ...agon socket screws and spring washers before setup Required tool Hexagon spanner size 4 Max torque see chapter Technical data À Ê Ê ÌÏÇ ÁŰ Ê ÆÌ Î ÊÁ ÆÌË Ç Ë Ê ÏÁÆ ÌÀ ËÌÊ È ÌÇ ÌÀ Ë ÆËÇÊƓ see following illustration 1 2 Fig 9 Mounting strap for screwing to the sensor 1 Variant 1 Inclination adjustable in steps 2 Variant 1 Inclination steplessly adjustable Depending on the selected variant the sensor ...

Страница 19: ... ÄÁ Æ ÌÀ Ë ÆËÇÊ ÌÇ ÌÀ ËÍÊ Ç ÌÀ bulk solid material The following versions are available Length 300 mm Length 170 mm Note For safe operation of the device stable permanent mounting on a load bearing surface concrete wood steel etc is required Take this into account when choosing the installation location and use suit able fastening materials screws dowels pipe clamps etc The instrument is normally ...

Страница 20: ...ernative the strap mounting is carried out horizontally or obliquely 200 mm 7 87 Fig 13 Wall mounting horizontally via the mounting strap with length 170 mm Fig 14 Wall mounting with inclined wall via the mounting strap with length 300 mm Two versions are available for mounting the instrument on a nozzle Mounting strap Wall mounting Flange ...

Страница 21: ...ÇÍËÁÆ Ɠ Ê ÌÊÇŲÌÌÁÆ ÌÇ Ç꼀 chamber housing is not possible 1 Á Ɩ ʾ ƕ ÇźÁ ÇÅÈÊ ËËÁÇÆ Ŵ Æ ʾ ÇźÁ ÇÅÈÊ ËËÁÇÆ Ŵ Æ ÈÌ Ê Ŵ Æ ƕ À ÈÌ Ê Ŵ Æ ÁË Î ÁÄ ºÄ ÊÇÅ ʾʽʽƓ ˀͷ Æ ʾʽʽƖ Ì is permanently connected with the radar sensor and sealed 3 1 2 Á Ɩ ʾ ƕ ÈÌ Ê Ŵ Æ 1 Connection screw ʿ ÈÌ Ê Ŵ Æ 3 Process seal 5 5 Mounting instructions Radar sensors for level measurement emit electromagnetic waves The polarisation is ...

Страница 22: ...nna size beam angle G NPT 14 G1 1 NPT 7 80 mm 3 3 1 m 0 25 m 0 12 m 0 05 m 2 m 0 5 m 0 25 m 0 1 m 3 m 0 75 m 0 25 m 0 15 m 5 m 1 2 m 0 35 m 0 25 m 8 m 2 m 1 m 0 4 m 10 m 2 4 m 1 2 m 0 5 m 20 m 4 8 m 2 4 m 1 m 30 m 7 25 m 3 5 m 1 5 m When mounting the device keep a distance of at least 200 mm 7 874 in from the vessel wall If the device is installed in the center of dished or round vessel tops multi...

Страница 23: ...ottom it can be advantageous to mount the device in the centre of the vessel as measurement is then possible down to the bottom Fig 19 Mounting of the radar sensor on vessels with conical bottom Mount the instrument at least 200 mm 7 874 in away from the vessel wall 200 mm 7 87 Fig 20 Mounting the radar sensor on the vessel top Mounting position bulk solids ...

Страница 24: ...tic horn antenna The reference plane is the sealing surface on the lower side Thread with integrated antenna system The reference plane is the sealing surface at the bottom of the hexa gon Flange with encapsulated antenna system À Ê Ê Æ ÈÄ Æ ÁË ÌÀ ÄÇÏ Ê ËÁ Ç ÌÀ Ŵ Æ ÈÄ ÌÁÆ Ɩ Ñ Á ÆÁ ŲÌÌÁÆ ƕ The reference plane is the highest contact point between sensor ÈÊÇ ËË ŲÌÌÁÆ Æ Ï Ä ËÇ Ã ÌƖ Horn antenna The re...

Страница 25: ...tion Ñ Á ÆÁ ŲÌÌÁÆ 6 Horn antenna 7 Flange with lens antenna Ç ÆÇÌ ÅÇÍÆÌ ÌÀ ÁÆËÌÊÍÅ ÆÌ ÁÆ ÇÊ ºÇÎ ÌÀ ŲÄÄÁÆ ËÌÊ ÅƖ à ËÍÊ ÌÀ Ì ÑÇÍ Ì Ì ÌÀ Å ÁÍÅ ËÍÊ Ɠ ÆÇÌ ÌÀ ÁÆŴÇÏÁÆ ÈÊÇ Í ÌƖ Á Ɩ ʿʿƕ ÇÍÆÌÁÆ Ç ÌÀ Ê Ê Ë ÆËÇÊ ÏÁÌÀ ÁÆŴÇÏÁÆ Å ÁÍÅ As a general rule the device must not be mounted too close to or ºÇÎ ÌÀ ÁÆŴÇÏÁÆ Å ÁÍÅƓ ÇÌÀ ÊÏÁË ÌÀ Ê Ê ËÁ Æ Ä ÇÍÄ º disturbed ÆŴÇÏÁÆ Å ÁÍÅ Ƙ ÄÁÉ uids ÆŴÇÏÁÆ Å ÁÍÅ Ƙ ºÍÄà solids ...

Страница 26: ...Ê Ɩ Ç ÎÇÁ À ÎÑ ËÇÁÄÁÆ Ç ÌÀ ÆÌ ÆÆ Ɠ ÌÀ ÁËÌ Æ ÌÇ ÆÑ ŲÄÌ Ê ÇÊ ÍËÌ exhauster should be as large as possible Á Ɩ ʿˀƕ ÇÍÆÌÁÆ Ç ÌÀ Ê Ê Ë ÆËÇÊ ÏÁÌÀ ÁÆŴÇÏÁÆ Å ÁÍÅ Ʊ ŲÄÄÁÆ ÊÇÅ ÌÇÈ ÁÄÇ ÏÁÌÀ Ä Ì Ê Ä ŲÄÄÁÆ ƕ À ÇÈÌÁÅ Ä ÅÇÍÆÌÁÆ ÈÇËÁÌÁÇÆ ÁË Æ ÐÌ ÌÇ ÌÀ ŲÄÄÁÆ Ɩ Ç ÎÇÁ À ÎÑ ËÇÁÄÁÆ Ç ÌÀ ÆÌ ÆÆ Ɠ ÌÀ ÁËÌ Æ ÌÇ ÆÑ ŲÄÌ Ê ÇÊ ÍËÌ ÐÀ ÍËÌ Ê should be as large as possible ...

Страница 27: ... Ë ÆËÇÊ ÏÁÌÀ ÁÆŴÇÏÁÆ Å ÁÍÅ Ʊ ŲÄÄÁÆ ÊÇÅ ÌÀ side For nozzle mounting the nozzle should be as short as possible and ÁÌË Æ ÊÇÍÆ Ɩ ÀÁË Ê Í Ë ÄË Ê Ŵ ÌÁÇÆË ÊÇÅ ÌÀ ÆÇÒÒÄ Ɩ With threaded connection the antenna end should protrude at least 5 mm 0 2 in out of the nozzle Socket mounting short nozzles ...

Страница 28: ...er than the antenna The socket end should be smooth and burr free if possible also rounded Note When mounting on a longer socket piece we recommend to carry out a false signal suppression see chapter Parameter adjustment This adapts the device to the metrological properties of the socket ÇÍ ÏÁÄÄ ŲÆ Ê ÇÅÅ Æ Î ÄÍ Ë ÇÊ ËÇ Ã Ì À Á ÀÌË ÁÆ ÌÀ ÇÄÄÇÏÁÆ illustration or the tables The values come from typic...

Страница 29: ...with integrated antenna system 3 Flange with encapsulated antenna system 4 Horn antenna 5 Flange with lens antenna Thread with integrated antenna system Socket diameter d Socket length h 40 mm 1 ʾ ʽ ÅÅ Ɩˆ ÁÆ 50 mm 2 ʿʽʽ ÅÅ Ɩˆ ÁÆ 80 mm 3 ˀʽʽ ÅÅ ʾʾƖ ÁÆ 100 mm 4 ˁʽʽ ÅÅ ʾ Ɩ ÁÆ 150 mm 6 ʽʽ ÅÅ ʿˀƖ ÁÆ Plastic horn antenna Socket diameter d Socket length h 80 mm 3 ˁʽʽ ÅÅ ʾ Ɩ ÁÆ 100 mm 4 ʽʽ ÅÅ ʾˆƖ ÁÆ 150 m...

Страница 30: ...iameter d Socket length h 100 mm 4 ʽʽ ÅÅ ʾˆƖ ÁÆ 150 mm 6 ʽʽ ÅÅ ˀʾƖ ÁÆ À ÎÁ ÁË ÄËÇ Î ÁÄ ºÄ ÏÁÌÀ Ŵ Æ Æ Æ ÈËÍÄ Ì ÆÌ ÆÆ system In this version the PTFE washer of the antenna encapsula tion is also the process seal 2 1 Á Ɩ ʿ ƕ ÏÁÌÀ Ŵ Æ Æ Æ ÈËÍÄ Ì ÆÌ ÆÆ ËÑËÌ Å 1 PTFE washer 2 Antenna encapsulation Note ƘÈÄ Ì Ŵ Æ ËƓ ÀÇÏ Î ÊƓ À Î ÈÊ ÄÇ ÄÇËË ÇÎ Ê ÌÁÅ ÏÁÌÀ large temperature changes This can negatively the s...

Страница 31: ...ntervals depend ing on the process pressure and temperature This will maintain the sealing properties of the antenna encapsulation against the process PTFE threaded adapters are available for VEGAPULS 6X with thread G1 resp 1 NPT Due to this only PTFE is in contact with the medium 1 3 2 4 5 6 6 Fig 29 VEGAPULS 6X with PTFE threaded adapter example VEGAPULS 6X with thread G1 1 Sensor 2 O ring seal ...

Страница 32: ... the hexagon into the threaded adapter Torque see chapter Technical data Torques Instruments for a temperature range from 200 C have a spacer for Ì ÅÈ Ê ÌÍÊ ÇÍÈÄÁÆ Ɩ Ì ÁË ÄÇ Ì º ÌÏ Æ ÈÊÇ ËË ŲÌÌÁÆ Æ electronics housing Note Incorrect installation of the device can render this temperature decou ÈÄÁÆ ÁÆ Ű ÌÁÎ Ɩ Å ÌÇ ÌÀ Ä ÌÊÇÆÁ Ë Æ º ÌÀ Ê ËÍÄÌƖ Æ ÆËÍÊ Ű ÌÁÎ Ì ÅÈ Ê ÌÍÊ ÇÍÈÄÁÆ Ɩ Æ ÄÍ ÌÀ ËÈ Ê ÁÆ ÌÀ Î ËË ...

Страница 33: ...essel installations such as struts or supports cause false echoes these can be attenuated through supplementary measures Å ÄÄƓ ÁÆ ÄÁÆ ËÀ Ì Å Ì Ä º ų Ë ºÇÎ ÌÀ ÁÆËÌ ÄÄ ÌÁÇÆË ͷ scatter ÌÀ Ê Ê ËÁ Æ ÄË Æ ÈÊ Î ÆÌ ÁÊ Ì ÁÆÌ Ê ÊÁÆ Ê Ŵ ÌÁÇÆËƖ Á Ɩ ˀʾƕ ÇÎ Ê Ŵ ÌƓ Ä Ê Ƙ Ê ÈÊÇŲÄ Ë ÏÁÌÀ Ŵ ÌÇÊË In liquids direct the device as perpendicular as possible to the me dium surface to achieve optimum measurement results F...

Страница 34: ...ume Tip The easiest way to align the device is with the optional swivelling holder Determine the suitable inclination angle and check the align ment with the alignment aid in the VEGA Tools app on the device Alternatively the angle of inclination can be determined using the following drawing and table It depends on the measuring distance d and the distance a between vessel centre and mounting posi...

Страница 35: ... 4 4 0 1 0 3 0 4 0 6 0 7 6 0 2 0 4 0 6 0 8 1 1 8 0 3 0 6 0 8 1 1 1 4 10 0 3 0 7 1 1 1 4 1 8 15 0 5 1 1 6 2 1 2 6 20 0 7 1 4 2 1 2 8 3 5 25 0 9 1 7 2 6 3 5 4 4 30 1 2 1 3 2 4 2 5 3 35 1 2 2 4 3 7 4 9 6 2 40 1 4 2 8 4 2 5 6 7 1 45 1 6 3 1 4 7 6 3 7 9 50 1 7 3 5 5 3 7 8 8 60 2 1 4 2 6 3 8 4 10 5 70 2 4 4 9 7 3 9 7 12 2 80 2 8 5 6 8 4 11 1 13 9 90 3 1 6 3 9 4 12 5 15 6 100 3 5 7 10 5 13 9 17 4 ...

Страница 36: ...of the swivel holder by one turn Use a hexagon socket wrench size 5 1 Fig 35 VEGAPULS 6X with swivelling holder 1 Terminal screws 6 pieces 2 Align the device check angle of inclination Note The max angle of inclination of the swivelling holder is approx 10 3 Re tighten the terminal screws max torque see chapter Techni cal data ÁÌ ÌÇÊË ÁÆ ÌÀ Î ËË Ä Æ Ê Ŵ Ì ÌÀ Å ËÍÊ Å ÆÌ ËÁ Æ Ä Æ ÌÀÍË lead to undesi...

Страница 37: ...rs with guided radar Large material heaps are best measured with several instruments which can be mounted on e g traverse cranes For this type of ap plication it is advantageous to orient the sensor perpendicular to the bulk solid surface À Ë ÆËÇÊË Ç ÆÇÌ ÁÆŴÍ Æ À ÇÌÀ ÊƖ Information In these applications it must be taken into account that the radar sen sors are designed for relatively slow level ch...

Страница 38: ...ch a separating wall ÇÆËÁ Ê ºÄ ÁÆÌ Ê ÊÁÆ Ê Ŵ ÌÁÇÆË Å Ñ Ç ÍÊƖ Ç ÎÇÁ ÌÀÁËƓ ÌÀ sensor should be installed at the greatest possible distance from the separating walls The optimal installation of the device is therefore on the outer wall of the silo The sensor should be directed towards the emptying point in the centre of the silo This can be done for example using the mount ing strap Fig 38 Installati...

Страница 39: ...hauster inside the vessel To protect the device against buildup particularly in case of strong condensation air rinsing is recommended Plastic horn antenna The VEGAPULS 6X with plastic horn antenna is optionally available ÏÁÌÀ ÊÁÆËÁÆ ÁÊ ÇÆÆ ÌÁÇÆƖ À Å À ÆÁ Ä ÇÆŲ ÍÊ ÌÁÇÆ ÁŰ ÊË ÇÊ ÁÆ ÌÇ ÌÀ Ŵ Æ Î ÊËÁÇÆƓ Ë ÇÄÄÇÏÁÆ Ê ÈÀÁ ËƖ 1 Á Ɩ ˁʽƕ Ä ËÌÁ ÀÇÊÆ ÆÌ ÆÆ ÏÁÌÀ ÇÅÈÊ ËËÁÇÆ Ŵ Æ 1 Rinsing air connection Dust dep...

Страница 40: ...cketed lens antenna 1 Rinsing air connection ÇÍ Æ ŲÆ Ì ÁÄË ÇÆ ÌÀ ÊÁÆËÁÆ ÁÊ ÇÆÆ ÌÁÇÆ ÁÆ À ÈÌ Ê ͷ Techni cal data 5 6 Measuring rigs bypass ºÑÈ ËË ÇÆËÁËÌË Ç ËÌ Æ ÈÁÈ ÏÁÌÀ Ä Ì Ê Ä ÈÊÇ ËË ŲÌÌÁÆ ËƖ Ì ÁË Ì tached to the outside of a container as a communicating vessel The VEGAPULS 6X in 80 GHz technology is suitable as standard for non contact level measurement in such a bypass Information For standpipe...

Страница 41: ...e marking must be in one plane with the tube connections to the vessel Instructions for the measurement The 100 point may not be above the upper tube connection to the vessel The 0 point may not be below the lower tube connection to the vessel Min distance sensor reference plane to upper edge of upper tube connection 200 mm The antenna diameter of the sensor should correspond to the inner diameter...

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