SM4xxx, SM6xxx, SM7xxx, SM8xxx
SM4xxx, SM6xxx, SM7xxx, SM8xxx by ifm electronic gmbh. DNV TA certificate TAA000037D.
Inspector Detail
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Common issues
- Product residue or condensate build-up on the antenna/sensor face reducing signal return
- False echoes from tank internals such as ladders, heating coils, or agitators
- Foam or heavy vapour on the liquid surface causing signal loss, depending on the measuring principle
- Cable gland or junction box moisture ingress
- Loss of the 4-20 mA/HART or fieldbus signal from wiring faults
- Tank echo map/mapping not updated after internal tank modifications
Inspection checklist
- Antenna/sensor face condition for build-up or damage
- Junction box and cable gland seal integrity
- Intrinsically-safe (Ex) certification labels and barrier intact, if fitted in a hazardous area
- Calibration/zero-span verified against an independent level reference (manual dip or equivalent)
- Signal strength/echo quality checked via the maker's configuration tool where available
- Earthing/bonding continuity
- Mounting nozzle/flange for corrosion or damage
Service intervals
| Antenna/sensor face inspection and cleaning | every 6-12 months, depending on cargo/product type |
| Calibration verification against an independent reference | annually or per the vessel's cargo system survey |
| Cable gland/junction box seal check | annually |
| Ex-certification label and barrier check | annually |
Typical wear limits
| Measurement accuracy drift | typically expected to remain within the maker's stated accuracy band for a radar-type level transmitter - confirm against the specific instrument's calibration certificate and manual |
| Junction box seal condition | any visible ingress of moisture indicates the seal has failed and should be renewed before it affects the electronics |
| Antenna face build-up | any coating thick enough to visibly change echo strength on the diagnostic trend should prompt cleaning - confirm the maker's acceptable build-up guidance for this sensor type |
Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.
Critical spares
- Sensor/transducer head assembly
- Junction box seal/gasket kit
- Mounting flange gasket
- Signal cable of the correct rating
- Ex-rated cable gland matching the installation's certification
Safety
- Hazardous area/intrinsically-safe certification must be preserved on any repair or gland replacement
- Work at cargo tank gauging points requires gas-free testing and a permit to work
- Electrical isolation required before opening the instrument housing
- Incorrect Ex-barrier reinstatement can defeat the intrinsic safety of the whole measuring loop
Class survey
Class interest is typically on cargo tank level/temperature gauging system integrity for cargo control and overfill/high-level alarm functions (SOLAS/IBC/IGC as applicable) - verify calibration records and that the DNV type approval certificate TAA000037D matches the installed sensor variant.
Components & Design
Component data being added…
Technical Data
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Maritime Network →DNV type approval
Verified against the DNV Approval Finder — the certificate below is issued by DNV, not by us.
- Certificate
- TAA000037D
- Approved as
- Flow Transmitter · Instrumentation and Automation
- Certificate holder
- ifm electronic gmbh (Germany)
- Valid until
- 2027-10-16