Technical Data
CompareContinuous / Liquids
| Measuring Principle | Radiometric |
| Characteristic / Application | Source container Emission angle: 40 / 20 degrees 435kg |
| Specialities | Sliding source support rod for manual or pneumatic on/ off switching |
| Ambient temperature | -55 °C...+100 °C (-67 °F...+212 °F) |
| Process temperature | Any |
| Process pressure / max. overpressure limit | Any |
| Main wetted parts | Non-contact |
| Process connection | Non-contact |
Continuous / Solids
| Measuring Principle | Radiometric |
| Characteristic / Application | Source container Emission angle: 40 / 20 degrees 435kg |
| Specialities | Control area calculation with Applicator |
| Ambient temperature | -55 °C...+100 °C (-67 °F...+212 °F) |
| Process temperature | Any |
| Process pressure / max. overpressure limit | Any |
| Main wetted parts | Non-contact |
| Process connection | Non-contact |
Density
| Measuring Principle | Radiometric Density |
| Characteristic / Application | Source container Emission angle: 5/ 20 / 40 degrees 435kg |
| Ambient temperature | -55 °C...+100 °C (-67 °F...+212 °F) |
| Process temperature | Any |
| Process pressure | Any |
| Wetted parts | Non-contact |
| Hygienic | Non-contact |
| Specialities | Control area calculation with Applicator |
Point Level / Liquids
| Measuring Principle | Radiometric Limit |
| Characteristic / Application | Source container Emission angle: 5 degrees Approximately 435 kg |
| Specialities | Control area calculation with Applicator |
| Ambient temperature | -55 °C ... +100 °C (-67 °F ...+212 °F) |
| Process temperature | Any |
| Process pressure / max. overpressure limit | Any |
| Main wetted parts | Non- contact |
| Process connection | Non- contact |
| Process connection hygienic | Non- contact |
Point Level / Solids
| Measuring Principle | Radiometric Limit |
| Characteristic / Application | Source container Emission angle: 5 degrees 435kg |
| Specialities | Control area calculation with Applicator |
| Ambient temperature | -55 °C...+100 °C (-67 °F...+212 °F) |
| Process temperature | Any |
| Process pressure / max. overpressure limit | Any |
| Main wetted parts | Non- contact |
| Process connection | Non- contact |
| Process connection hygienic | Non- contact |
The radiation source capsule FQG66 is used to house the radiation source in radiometric limit detection, continuous level measurement and density measurement. The radiation is emitted almost without attenuation in only one direction and is shielded in all other directions, ensuring maximum personnel safety and measurement reliability.
Benefits
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Highest safety class (DIN 25426/ISO 2919, typical class C66646), allowing simple and convenient source replacement
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Extremely strong shielding effect, direct installation without a controlled area
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Additional metal source capsule with O-ring seal protects the source from mechanical and chemical influences
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Small space requirement, simple installation and various radiation angles for optimum application results
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Open/close switch position locked with a padlock for anti-theft protection
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Switch status conveniently visible through the glass window in the cover or via the remote display of a proximity switch
Applications
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Houses the radiation source for radiometric limit detection, level and density measurement. Highly sensitive rod-type scintillator detectors minimize the surrounding radiation dose
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Used when the shielding effect of smaller source capsules (FQG61/62) is insufficient
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Source activity: 740 GBq (20,000 mCi) for 137Cs, 185 GBq (5,000 mCi) for 60Co
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Process temperature: unrestricted (external installation)
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Process pressure: unrestricted (external installation)
Spare Parts & Accessories 9
9 spare parts · click to collapse
| Order code | Description | |
|---|---|---|
| 71301286 | O-ringO-ring 138.0x6.0 FVMQ. Usage: FQG66. | Details |
| 71301296 | plain bearing assemblyConsists of: bearing bush, thrust washer. Usage: FQG66. | Details |
| 71341171 | boltConsisting of: Bolt, fixing wire with sleeve. Usage: FQG66. | Details |
| 71301299 | Sight glass FQG66, sealMaterial: 1.4305. Window: glas. Flat seal: FVMQ. Usage: hood FQG66. | Details |
| 71301302 | padlockWith key, simultaneous locking. Usage: FQG61/FQG62/FQG66. | Details |
| 71301303 | ScrewConsists of: ventilation screw 304. Pressure compensation filter. O-ring VMQ, protection lid. Usage: hood FQG66. | Details |
| 71099277 | Proximity switchUsage: FQG61/FQG62/FQG66. Two pieces per instrument are required. | Details |
| 71301298 | Junction BoxWith fixing screws. Usage: FQG66. | Details |
| 916497-0000 | Label "caution radiation" _SSCorrosion resistant steel, 304. | Details |
Configurator / Comparison
Source: Endress+Hauserpublic information from the website
Manuals & Documents 4
All documents for this modelCase Studies
Municipal Wastewater Treatment · radiant — Application Case
Site Conditions
This is a Municipal Wastewater Treatment customer whose plant is at the inlet, biological and outlet stages of a municipal plant. The main task was non-contact level measurement in extreme duty using radiometric principles.
The Problem
The difficulty lies in high solids and corrosive fractions, with large diurnal flow swings; at the same time effluent parameters drift and probes foul with sludge and biofilm. Specification therefore means sizing source strength against wall thickness, density and licensing requirements.
What We Did
We took a level range approach — level solution matched to the actual tank and silo geometry. Delivery was built around sizing source strength against wall thickness, density and licensing requirements, with point-by-point checks on: stable compliance with Grade 1A discharge limits and online data reporting.
Operating Outcome
In service the system performs as intended — measurable under high temperature, pressure and corrosion without intruding into the vessel, with routine maintenance falling noticeably.
Food & Beverage · radiant — Application Case
Application Context
dosing, pasteurising, filling and CIP stages is a typical Food & Beverage duty. The project started from radiant, focusing on non-contact level measurement in extreme duty using radiometric principles.
Process Constraints
frequent cleaning demands instruments that withstand hot CIP/SIP caustic cycles, and syrups, dairy and beverages that scale easily, under strict hygienic requirements only amplify it. The radiant specification must therefore cover sizing source strength against wall thickness, density and licensing requirements.
Delivery Approach
Delivery was handled as the level range — level solution matched to the actual tank and silo geometry. Execution centred on sizing source strength against wall thickness, density and licensing requirements, together with food-safety and hygienic design per 3-A / EHEDG.
Field Results
Operation shows the benefit clearly — measurable under high temperature, pressure and corrosion without intruding into the vessel, with confidence in this measuring point improving markedly.
Chemical & Pharmaceutical · radiant — Application Case
Customer Profile
The typical setting in Chemical & Pharmaceutical is reactors, metering vessels and finished-product tanks. The measuring point is radiant; the focus is non-contact level measurement in extreme duty using radiometric principles.
Key Difficulties
Conditions are highly corrosive media with solvents and crystallisation, partly in explosive atmospheres and, on top of that, corrosion plus Ex protection shortens instrument life and makes downtime costly, which a standard configuration cannot handle for long. The design therefore starts with sizing source strength against wall thickness, density and licensing requirements.
Implementation
The scope ran through the level range: level solution matched to the actual tank and silo geometry. Technically it hinges on sizing source strength against wall thickness, density and licensing requirements, and on these requirements: Ex certification and GMP traceability of records.
Customer Benefit
In practice this means measurable under high temperature, pressure and corrosion without intruding into the vessel, which cut the workload on the site maintenance team.
Power & Energy · radiant — Application Case
Project Background
The project covers boiler feedwater, turbine condensate and FGD/DeNOx systems. The work centres on radiant and the core task is non-contact level measurement in extreme duty using radiometric principles.
Operating Challenges
The medium and duty are characterised by high temperature and pressure with both steam and saline water, and drift under high temperature and pressure, with very costly unplanned outages. So radiant cannot be specified generically — it calls for sizing source strength against wall thickness, density and licensing requirements.
Solution
The Ainstru engineering team worked through the level range: level solution matched to the actual tank and silo geometry. The configuration involves sizing source strength against wall thickness, density and licensing requirements, with these requirements in view: compliance with power-industry codes and unit availability targets.
Results
Since start-up the system has run steadily; the practical result is measurable under high temperature, pressure and corrosion without intruding into the vessel.
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