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Radiometric measurement Gamma Modulator FHG65

Effective suppression of background radiation and extraneous radiation at the Gammapilot FMG50

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Radiometric measurement Gamma Modulator FHG65

Effective suppression of background radiation and extraneous radiation at the Gammapilot FMG50

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Benefits

  • Unhindered measurement with Gammapilot FMG50 in the event of interference radiation from non-destructive material testing up to 50μSv/h or fluctuating background radiation
  • Highest system safety thanks to safe measuring signals
  • Continuing measurements which increase plant availability and reliability
  • Cost efficient system without maintenance requirements
  • Easy installation in conjunction with FQG61/62 source containers
  • Easy integration into existing systems and fast operation
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.

Learn more

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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Product information

Gamma Modulator FHG65 - Radiometric measurement
Radiometric - Gamma Modulator FHG65
Specifications
Continuous / Liquids
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Description

The Gamma Modulator FHG65 is made for effective suppression of background and extraneous radiation (e. g. from non-destructive materials testing). The Gammapilot FMG50 can separate useful signals from interference radiation by its modulated radiation. This enables continuing measurements which increase plant availability and reliability.

Field of application

Improving the measurement results of radioactive measurement through the effective suppression of background radiation and extraneous radiation (e.g. from non-destructive material testing) at the Gammapilot FMG50.

  • Temperature: No limitation (non-invasive, extraneous)
  • Pressure: No limitation (non-invasive, extraneous)
Benefits
  • Unhindered measurement with Gammapilot FMG50 in the event of interference radiation from non-destructive material testing up to 50μSv/h or fluctuating background radiation
  • Highest system safety thanks to safe measuring signals
  • Continuing measurements which increase plant availability and reliability
  • Cost efficient system without maintenance requirements
  • Easy installation in conjunction with FQG61/62 source containers
  • Easy integration into existing systems and fast operation
Downloads
Most downloaded
Ex Safety Instruction (XA)
Safety Instructions Gamma Modulator FHG65 Ex d IIC T6, T5 Gb
Ex d e IIC T6, T5 Gb
English version - 10/2014
Download
Technical Information (TI)
Gamma Modulator FHG65 Synchronizer FHG66 Radiometric measuring technology
English version - 02/2022
Download
Operating Instruction (BA)
Gamma Modulator FHG65 Synchronizer FHG66 Radiometric measuring technology
English version - 03/2022
Download
The CAD Drawings will be available after the configuration.
All downloads
33 Downloads
Technical Information (TI)
Most downloaded
Gamma Modulator FHG65 Synchronizer FHG66 Radiometric measuring technology
English version - 02/2022
Download
Operating Instruction (BA)
Gamma Modulator FHG65 Synchronizer FHG66 Radiometric measuring technology
English version - 03/2022
Download
Installation Instructions (EA)
Motor/ gear assembly Installation instruction Gammamodulator FHG65
English version - 04/2012
Download
Installation Instructions (EA)
Optical switch / motor connection Installation instruction Gammamodulator FHG65
English version - 04/2012
Download
Installation Instructions (EA)
Electronics / distance bolts Installation instruction Gammamodulator FHG65
English version - 04/2012
Download
Ex Safety Instruction (XA)
Most downloaded
Safety Instructions Gamma Modulator FHG65 Ex d IIC T6, T5 Gb
Ex d e IIC T6, T5 Gb
English version - 10/2014
Download
Ex Safety Instruction (XA)
Gamma Modulator FHG65 1Ex d e IIC T5...T6 Gb X
1Ex d IIC T5...T6 Gb X
English version - 02/2022
Download
Ex Safety Instruction (XA)
Gamma Modulator FHG65 II 2 G Ex dbIIC T6, T5 Gb
II 2 G Ex db eb IIC T6,T5 Gb
English version - 10/2022
Download
Ex Safety Instruction (XA)
Gamma Modulator FHG65 ATEX:
II 2 G Ex db IIC T5/T6 Gb
II 2 G Ex db eb IIC T5/T6 Gb
II 2 D Ex tb IIIC Txx°C Db
IECEx:
Ex db IIC T5/T6 Gb
Ex db eb IIC T5/T6 Gb
Ex tb IIIC Txx°C Db
English version - 08/2021
Download
Ex Safety Instruction (XA)
XA Gamma Modulator FHG65 Ex db eb IIC T5/T6 Gb
Ex db IIC T5/T6 Gb
English version - 09/2023
Download
Certificates FM/CSA (ZD)
Modulator FHG65 CSA
Drawing No.: 960008704 -
Drawing Type: Control Drawing
English version - 08/2008
Download
Certificates FM/CSA (ZD)
Modulator FHG65 FM
Drawing No.: 960008703 -
Drawing Type: Control Drawing
English version - 08/2008
Download
Fields of Activities (FA)
Misura di livello Misura di livello
Panoramica dei prodotti per
applicazioni in liquidi e solidi sfusi
Italian version - 06/2026
Download
Fields of Activities (FA)
Catálogo Medición y Detección de nivel Gama de productos para aplicaciones con líquidos y sólidos
Spanish version - 06/2022
Download
Fields of Activities (FA)
レベル計 総合カタログ 液体および粉体アプリケーション向けレベル計・レベルスイッチ
Japanese version - 12/2025
Download
Fields of Activities (FA)
Misura di livello Misura di livello
Panoramica dei prodotti per applicazioni in liquidi e solidi sfusi
Italian version - 03/2023
Download
Fields of Activities (FA)
Füllstandsmesstechnik Produktübersicht für Anwendungen in Flüssigkeiten und Schüttgütern
German version - 10/2022
Download
Fields of Activities (FA)
Level measurement Product overview for applications in liquids and bulk solids
English version - 03/2026
Download
Manufacturer Declaration
Product family: Accessory radiometry Product root: FHG65-
Declaration number: HE_00582_01.17
Manufacturer specification: RoHS
Chinese version - 03/2017
Download
EU Declaration
Product family: Accessory radiometry Product root: FHG65-
Declaration number: EC_00198_03.16
English version - 08/2021
Download
UK Conformity Assessed
Product family: Accessory radiometry Product root: FHG65-
Declaration number: UK_00263_01.21
English version - 11/2021
Download
UK Conformity Assessed
Product family: Accessory radiometry Product root: FHG65-
Declaration number: UK_00457_01.21
Additional information: FHG65
English version - 11/2021
Download
Miscellaneous
Product family: Accessory radiometry Product root: FHG65-, FHG66-
Region: Australia
Approval agency: ACMA
Approval number: EC12027A
English version - 12/2012
Download
Explosion Protection
Product family: Accessory radiometry Product root: FHG65-
Region: USA
Approval agency: FM
Category: I,II,III/1/A,B,C,D,E,F,G/
Protection: DIP, XP
English version - 09/2008
Download

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Spare parts and accessories

Cover
Cover

Cover FHG65, 304, gasket

Cover
Cover
Order code 71071829
Drawing number 20
Sealing
Sealing

O-ring 91.67x3.53 FKM, 5 pieces

Sealing
Sealing
Order code 71071830
Drawing number 21
further parts
further parts

Fixing cooling tube FMG60/FHG65

further parts
further parts
Order code 71071848
Drawing number 70
Spare parts and accessories
Gamma Modulator FHG65 - Radiometric measurement
Radiometric - Gamma Modulator FHG65

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Gamma Modulator FHG65 - Radiometric measurement
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Spare parts and accessories

Cover
Cover

Cover FHG65, 304, gasket

Cover
Cover
Order code 71071829
Drawing number 20
Sealing
Sealing

O-ring 91.67x3.53 FKM, 5 pieces

Sealing
Sealing
Order code 71071830
Drawing number 21
further parts
further parts

Fixing cooling tube FMG60/FHG65

further parts
further parts
Order code 71071848
Drawing number 70
Spare parts and accessories

Selection of compatible products

/