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Radiometric Level and density Source Container FQG66

Radiation source container with sliding source support rod for manual or pneumatic on/off switching

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Radiometric Level and density Source Container FQG66

Radiation source container with sliding source support rod for manual or pneumatic on/off switching

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Benefits

  • High safety level thanks to highest safety classification for the source supplied
 (DIN 25426/ISO 2919, typically classification C66646) and simple and easy source replacement
  • Extremely high shielding ensures that no control areas are generally required and that installation in accessed areas is possible
  • Additional metallic protective capsule with O-ring seal to protect the source against mechanical and chemical influences
  • Low space requirement and simple mounting and various angles of emission for optimum adaption to the application
  • Padlock for fixation the on/off switch position and to protect against theft
  • Easy identification of switch status through sight glasses on the cover or by remote display with proximity switches
FLEXible answers to individual needs
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Radiometric Level and density Source Container FQG66

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  • Specialized products
  • Designed for demanding applications

What is FLEX?

FLEX selections
Technical excellence
Simplicity
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Fundamental selection Meet your basic measurement needs
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Lean selection Handle your core processes easily
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Extended selection Optimize your processes with innovative technologies
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Xpert selection Master your most challenging applications
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Manufacturer's warranty

Engineered for confidence

Our instruments are designed for long‑lasting performance, precise measurement, and dependable operation in demanding industrial environments. Each product includes a standard manufacturer’s warranty that reflects our commitment to quality and to the trust you place in our solutions.

Should a warranty case occur, the device will be assessed and the applicable remedy will be provided in line with the warranty terms – helping ensure a reliable and efficient resolution and supporting continued operation of your measurement point.

Request for extended warranty

If you require extended warranty coverage, simply contact your local Endress+Hauser representative. Our experts will advise you on the available options to match your application and risk profile, helping you protect your investment, reduce unexpected repair costs, and ensure reliable long‑term operation beyond the manufacturer's warranty period.

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Warranty terms apply

The manufacturer's warranty and extended warranty are subject to specific conditions. For full details, please refer to the locally applicable General Terms and Conditions (GTC), which can be found on the respective country page of our website.

Services by your side

Right‑first‑time commissioning, worldwide

Endress+Hauser’s qualified service engineers ensure your measurement devices are commissioned right the first time, delivering application‑aligned accuracy, regulatory compliance, and operational confidence from startup onwards, anywhere in the world.

Remote support you can trust wherever you operate

With Endress+Hauser Smart Support, you benefit from faster issue resolution, higher uptime, reliable global expertise across the entire product lifecycle – and lasting peace of mind.

Committed to long‑term, sustainable performance

With deep field expertise, harmonized processes, and continuous monitoring, we accompany you with comprehensive service offerings – from initial start‑up through instrumentation maintenance to process optimization – as a true lifetime partner delivering improved outcomes.

For additional information, please contact your local Endress+Hauser representative.

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Select and download all technical documentation such as operating manuals, calibration certificates, approvals and CAD drawings conveniently bundled as a complete documentation package for your entire order or quote.

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Product information

Source Container FQG66 - Radiometric measurement
Radiometric - Source Container FQG66
Specifications
Continuous / Liquids
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Description

The FQG66 source container is designed to hold the radioactive source with highest activities during radiometric point level detection, continuous level and density measurement. The radiation is emitted almost unattenuated in one direction only, and is damped in all other directions. This guarantees highest safety for the personnel and a reliable measurement.

Field of application

Encloses the radioactive source used for radiometric point level detection, level and density measurement. Operating with very high sensitivity rod scintillation detectors, provide lowest possible radiation loads in the surrounding.

  • Used if the shielding effectiveness of smaller source containers (FQG61/62) are too low
  • Activity: 137Cs 740GBq (20,000mCi), 60Co to 185GBq (5,000mCi)
  • Process temperature: No limitation (extraneous)
  • Process pressure: No limitation (extraneous)
Benefits
  • High safety level thanks to highest safety classification for the source supplied
 (DIN 25426/ISO 2919, typically classification C66646) and simple and easy source replacement
  • Extremely high shielding ensures that no control areas are generally required and that installation in accessed areas is possible
  • Additional metallic protective capsule with O-ring seal to protect the source against mechanical and chemical influences
  • Low space requirement and simple mounting and various angles of emission for optimum adaption to the application
  • Padlock for fixation the on/off switch position and to protect against theft
  • Easy identification of switch status through sight glasses on the cover or by remote display with proximity switches
Downloads
Most downloaded
Technical Information (TI)
Source container FQG66 Radiometric level measurement
English version - 06/2020
Download
Special Documentation (SD)
Source container FQG60, FQG61, FQG62, FQG63, FQG66 Instructions for loading and changing the source Label set Special Documentation Radiometric level measurement
English version - 10/2016
Download
Operating Instruction (BA)
BA Source container FQG66 Radiometric level measurement
English version - 12/2025
Download
The CAD Drawings will be available after the configuration.
All downloads
29 Downloads
Technical Information (TI)
Most downloaded
Source container FQG66 Radiometric level measurement
English version - 06/2020
Download
Operating Instruction (BA)
BA Source container FQG66 Radiometric level measurement
English version - 12/2025
Download
Installation Instructions (EA)
Proximity switch Installation Instruction Source container FQG61, FQG62, FQG66
English version - 11/2015
Download
Installation Instructions (EA)
Source holder and gasket set Installation Instruction Source container FQG66
English version - 11/2015
Download
Installation Instructions (EA)
Terminal box Source container FQG61, FQG62, FQG66
English version - 11/2021
Download
Installation Instructions (EA)
Ball locking bolt Installation instruction Source container FQG66
English version - 09/2016
Download
Installation Instructions (EA)
Sight glass and vent screw Installation Instruction Source container FQG66
English version - 11/2015
Download
Installation Instructions (EA)
O-ring cap Installation Instruction Source container FQG66
English version - 11/2015
Download
Installation Instructions (EA)
Slide bearing set Installation Instruction Source container FQG66
English version - 11/2015
Download
ZE (Certificate)
RFID TAG Certificate/Declaration of Conformity ATEX:
II 2 G Ex ia IIC T6 Gb
II 2 D Ex ia IIIC T80°C Db;
IECEx:
Ex ia IIC T6 Gb
Ex ia IIIC T80°C Db
IECEx EPS 15.0042X; EPS 15 ATEX 1 1011 X
English version - 02/2019
Download
Special Documentation (SD)
RFID TAG Special Documentation RFID TAG
Special Documentation
English version - 08/2015
Download
Special Documentation (SD)
SD Transportation cask for shipping radioactive sources Radiometric level measurement
English version - 03/2024
Download
Special Documentation (SD)
SD Tagging Level and pressure measuring instruments
English version - 04/2024
Download
Special Documentation (SD)
SD QGx, FQGx, FSG6x Returning: Source containers, radiation sources
English version - 02/2025
Download
Special Documentation (SD)
Most downloaded
Source container FQG60, FQG61, FQG62, FQG63, FQG66 Instructions for loading and changing the source Label set Special Documentation Radiometric level measurement
English version - 10/2016
Download
Special Documentation (SD)
Radiation Safety and Technical Reference Manual U.S. Specific License for source container FQG66
English version - 05/2020
Download
Special Documentation (SD)
SD Source Container FQG60, FQG61/62, FQG63, FQG66, FQG74 Supplementary safety instructions for radiation sources and source containers approved for use in Canada
English version - 01/2026
Download
Fields of Activities (FA)
Füllstandsmesstechnik Produktübersicht für Anwendungen in Flüssigkeiten und Schüttgütern
German version - 10/2022
Download
Manufacturer Declaration
Product family: Strahlenschutzbehälter Product root: FQG66-
Declaration number: HE_02026_02.26
Manufacturer specification: Operating conditions
English version - 01/2026
Download
Manufacturer Declaration
Product family: Strahlenschutzbehälter Product root: FQG66-
Declaration number: HE_01666_01.22
Manufacturer specification: Performance characteristics
German version - 09/2022
Download
EU Declaration
Product family: Strahlenschutzbehälter Product root: FQG66-
Declaration number: EU_01263_01.26
English version - 02/2026
Download
EU Declaration
Product family: Strahlenschutzbehälter Product root: FQG66-
Declaration number: EU_01262_01.26
English version - 02/2026
Download
Metrology
Product family: Gammapilot, Strahlenschutzbehälter, Strahler, Accessory radiometry Product root: FHG65-, FHG66-, FMG50-, FQG60-, FQG61-, FQG62-, FQG63-, FQG66-, FSG60-, FSG61-
Region: Kazakhstan
Approvalagency: KazStandard
Approval number: 1254
Metrology type: Metrology
Russian version - 10/2021
Download
Metrology
Product family: Gammapilot, Strahlenschutzbehälter, Accessory radiometry Product root: FHG65-, FHG66-, FMG50-, FQG60-, FQG61-, FQG62-, FQG63-, FQG66-
Region: Uzbekistan
Approval agency: UZS
Approval number: 02-2.0094
Metrology type: Metrology
Russian version - 02/2022
Download

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Selection of compatible products

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Spare parts and accessories

Sealing
Sealing

O-ring cap FQG66, FVMQ

Sealing
Sealing
Order code 71301286
Drawing number 21
Miscellaneous
Miscellaneous

Slide bearing set FQG66

Miscellaneous
Miscellaneous
Order code 71301296
Drawing number 52
Housing/housing accessories
Housing/housing accessories

Ball locking bolt FQG66, VA

Housing/housing accessories
Housing/housing accessories
Order code 71341171
Drawing number 53
Miscellaneous
Miscellaneous

Sight glass FQG66, seal

Miscellaneous
Miscellaneous
Order code 71301299
Drawing number 24
Spare parts & accessories
Source Container FQG66 - Radiometric measurement
Radiometric - Source Container FQG66

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Source Container FQG66 - Radiometric measurement
Radiometric - Source Container FQG66
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Spare parts and accessories

Sealing
Sealing

O-ring cap FQG66, FVMQ

Sealing
Sealing
Order code 71301286
Drawing number 21
Miscellaneous
Miscellaneous

Slide bearing set FQG66

Miscellaneous
Miscellaneous
Order code 71301296
Drawing number 52
Housing/housing accessories
Housing/housing accessories

Ball locking bolt FQG66, VA

Housing/housing accessories
Housing/housing accessories
Order code 71341171
Drawing number 53
Miscellaneous
Miscellaneous

Sight glass FQG66, seal

Miscellaneous
Miscellaneous
Order code 71301299
Drawing number 24
Spare parts & accessories

Selection of compatible products

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